Quick view Details SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT MSRP: Now: $179.95 Add to Cart Compare Quick view Details TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* MSRP: Now: $822.98 Choose Options Compare Quick view Details TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* MSRP: Now: $643.98 Choose Options Compare Quick view Details GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A MSRP: Now: $109.95 Out of stock Compare Quick view Details GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS MSRP: Now: $94.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $79.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $80.73 Add to Cart Compare Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* MSRP: Now: $822.98 Choose Options Compare Quick view Details TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* MSRP: Now: $643.98 Choose Options Compare Quick view Details GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A MSRP: Now: $109.95 Out of stock Compare Quick view Details GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS MSRP: Now: $94.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $79.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $80.73 Add to Cart Compare Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* MSRP: Now: $643.98 Choose Options Compare Quick view Details GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A MSRP: Now: $109.95 Out of stock Compare Quick view Details GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS MSRP: Now: $94.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $79.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $80.73 Add to Cart Compare Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A MSRP: Now: $109.95 Out of stock Compare Quick view Details GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS MSRP: Now: $94.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $79.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $80.73 Add to Cart Compare Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS MSRP: Now: $94.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $79.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $80.73 Add to Cart Compare Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $79.95 Out of stock Compare Quick view Details TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $80.73 Add to Cart Compare Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON MSRP: Now: $80.73 Add to Cart Compare Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS MSRP: Now: $119.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) MSRP: Now: $249.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 MSRP: Now: $134.95 Add to Cart Compare Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 MSRP: Now: $124.95 Add to Cart Compare Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* MSRP: Now: $110.95 Choose Options Compare Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view SSP-G | sku: 169-154 SSP-G 90cc *54mm BORE* MINARELLI JOG BIG BORE KIT 90cc (BASED ON STROKE) 2-STROKE BIG BORE KIT FOR CHINESE SCOOTERS *SSP-G* THIS KIT HAS A 54mm CYLINDER BORE & 12mm WRIST PIN WRIST PIN DIAMETER: 12mm WRIST PIN LENGTH: 44mm FITS 1PE50QMB MINARELLI BASED ENGINES WITH... MSRP: Now: $179.95 Add to Cart Compare Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view TAIDA | sku: J300-204 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START & BORING TOOL* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $822.98 Choose Options Compare Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view TAIDA | sku: J300-204-2 TAIDA 204cc POLARIS RAZOR 170 BIG BORE KIT COMPLETE *J-300 EASY START* TAIDA HIGH PERFORMANCE 204cc BIG BORE KIT INCLUDED IN KIT CERAMIC *HIGH HEAT* 67mm CYLINDER PISTON, RINGS, TOP & BOTTOM GASKETS WRIST PIN AND CIR CLIPS CYLINDER OD = 69.5mm / ID 67mm CYLINDER 69.3mm HIGH SPECIAL... MSRP: Now: $643.98 Choose Options Compare Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view GY6 STORE | sku: TYPE #3 A 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS TYPE #3 A GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOUR ENGINE TO A 155cc BEAST SET... MSRP: Now: $109.95 Out of stock Compare Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view GY6 STORE 58.5mm (155cc) BIG BORE KIT FOR SCOOTER ATV KART WITH 150cc GY6 MOTORS GY6STORE 155cc BIG BORE KIT FOR CHINESE SCOOTERS58.5mm BORE (NO BORING REQUIRED)TAKE YOUR STOCK 150cc GY6 MOTOR TO THE NEXT LEVEL WITH THIS NO BORING REQUIRED DROP IN KIT. WITH THIS KIT YOU WILL TAKE YOU ENGINE TO A 155cc BEAST SET... MSRP: Now: $94.95 Out of stock Compare Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view TAIDA | sku: GY650-01052 TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 88cc (52mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (52mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $79.95 Out of stock Compare Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view TAIDA | sku: GY650-01050 TAIDA 50mm (81cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON TAIDA HIGH PERFORMANCE 81cc (50mm) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (50mm) 54mm SPACING *A-BLOCK* GASKET SET CAST PISTON PISTON RINGS WRIST PIN & CLIPS EVERYTHING IN THE PHOTOS OD:... MSRP: Now: $80.73 Add to Cart Compare Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view TAIDA | sku: GY650-020-23/20 TAIDA BIG VALVE CYLINDER HEAD (FOR 50mm & 52mm CYLINDER , 23 / 20 VALVES) FOR QMB139 MOTORS TAIDA BIG VALVE RACING CYLINDER HEAD FITS: 50mm & 52mm **64mm OVERSIZED VALVES** 64mm 2-VALVE: 23mm INTAKE / 20mm EXHAUST FACTORY PORTED: 24mm INTAKE / 22mm EXHAUST REQUIRES A 20mm CARBURETOR ALSO A HIGH... MSRP: Now: $119.95 Add to Cart Compare Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view NCY | sku: 1100-1237, 1100-1239 NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR) NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT KIT INCLUDES: CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE... MSRP: Now: $249.95 Add to Cart Compare Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view NCY | sku: 1100-1247 NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139 NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE NCY GY 50/QMB139 47MM BORE, CAST IRON, CYLINDER KIT W/O HEAD OUR MOST POPULAR BIG BORE KIT FOR THE QMB139/GY6 50 SCOOTER ENGINE, THIS BOLT ON 72CC KIT... MSRP: Now: $134.95 Add to Cart Compare Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view NCY | sku: 1100-1237 NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139 NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS... MSRP: Now: $124.95 Add to Cart Compare Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected
Quick view TAIDA | sku: GY6-01054-63 TAIDA 180cc - 206cc (63mm BORE) GY6 CYLINDER SET WITH *54mm SPACING* TAIDA HIGH PERFORMANCE 180cc (63mm BORE) CYLINDER SET FOR 54mm SPACING INCLUDES CYLINDER JUG (63mm) 54mm SPACING *A-BLOCK* GASKET SET YOUR CHOICE PISTON PISTON RINGS WRIST PIN & CLIPS CYLINDER OD = 66.5mm /... MSRP: Now: $110.95 Choose Options Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected