Quick view Details GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS MSRP: Now: $9.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $21.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS MSRP: Now: $9.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $21.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS MSRP: Now: $9.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $21.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $21.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $21.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $21.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS MSRP: Now: $22.95 Add to Cart Compare Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view Details GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 80106 150cc (57mm BORE) CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH: 66mm SHAFT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 90099 150cc (57mm BORE) EGR STYLE CYLINDER HEAD *WITH VALVES INSTALLED* FOR GY6 MOTORS 150cc EGR STYLE CYLINDER HEAD WITH VALVES INSTALLED FOR MOTORS WITH 57mm CYLINDER BORE OVERALL HEIGHT: 60mm INTAKE PORT DIAMETER: 24mm EXHAUST PORT DIAMETER: 24mm INTAKE VALVE VALVE DIAMETER: 27.75mm LENGTH:... MSRP: Now: $19.95 Add to Cart Compare Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view TAIDA | sku: 60167 150cc VALVE COVER WITH EGR FOR SCOOTER ATV KART WITH GY6 MOTORS 150cc GY6 VALVE COVER (EGR) FITS: 54mm SPACING (A-BLOCK) 57mm SPACING (B-BLOCK) SHIPS FROM SHELBY, NC MSRP: Now: $9.95 Add to Cart Compare Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 63078 50cc (39mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 90090 50cc (39mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc NON-EGR CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* NON-EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER:... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 90087 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $21.95 Add to Cart Compare Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 90088 50cc (39mm) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 50cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 39mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 39mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.5mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 87861 60cc (44mm BORE) CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 90094 60cc (44mm BORE) CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 87862 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *64mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $19.95 Add to Cart Compare Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected × OK
Quick view GY6 STORE | sku: 90092 60cc (44mm BORE) EGR STYLE CYLINDER HEAD WITH *69mm VALVES* FOR QMB139 MOTORS 60cc EGR STYLE CYLINDER HEAD WITH 69mm VALVES INSTALLED FOR MOTORS WITH 44mm CYLINDER BORE* EGR STYLE CYLINDER HEAD * 44mm BORE * VALVE LENGTH: 69mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 17mm * EXHAUST PORT... MSRP: Now: $22.95 Add to Cart Compare Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected
Quick view GY6 STORE | sku: 89274 72cc / 80cc (47mm BORE) CYLINDER HEAD *64mm VALVES* FOR QMB139 MOTORS 72cc / 80cc CYLINDER HEAD WITH 64mm VALVES INSTALLED FOR MOTORS WITH 47mm CYLINDER BORE* CYLINDER HEAD * 47mm BORE * VALVE LENGTH: 64mm * OVERALL HEIGHT: 59.60mm * INTAKE PORT DIAMETER: 18mm * EXHAUST PORT DIAMETER: 18mm *... MSRP: Now: $19.95 Add to Cart Compare 1 2 3 4 5 6 Next 1 2 3 4 5 6 Next Compare Selected