80cc (47mm BORE) CYLINDER UPGRADE KIT FOR QMB139 MOTORS

80cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERSTHIS KIT HAS A 47mm CYLINDER BORE    THIS KIT HAS NO CYLINDER HEAD   QMB139 47MM PISTON KIT   PISTON DIAMETER: 47mm  PISTON PIN DIAMETER: 13mm  PISTON PIN LENGTH:...

NARAKU SCOOTER PERFORMANCE BIG BORE CYLINDER & HEAD KIT *52.4mm*

NARAKU 50cc QMB139 4-STROKE 52.4mm, RACING BIG BORE CYLINDER AND HEAD KIT. KIT INCLUDES CYLINDER, PISTON, RINGS, PISTON PIN, CIR CLIPS, CYLINDER HEAD, HEAD GASKET, AND BASE GASKET.   WHEN USED IN CONJUNCTION WITH A STOCK STROKE OF 41.4mm THE...

NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT (NON-EGR)

NCY 81cc *50mm BORE* PERFORMANCE CYLINDER AND HEAD KIT   KIT INCLUDES:   CYLINDER HEAD *50mm* CYLINDER JUG *50mm* GASKET SET WRIST PIN WITH CIR CLIPS PISTON & RINGS     THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE...

NCY CYLINDER UPGRADE KIT (72cc, IRON, 47mm BORE) FOR QMB139

NCY 72cc BIG BORE CYLINDER KIT FOR CHINESE SCOOTERS THIS KIT HAS A 47mm CYLINDER BORE    KIT INCLUDES   CYLINDER: 47mm BORE *72cc* GASKET SET PISTON WITH PISTON RINGS WRIST PIN CIR CLIPS   THIS IS A DROP IN CYLINDER KIT, NO...

NCY CYLINDER UPGRADE KIT (81cc, IRON, 50mm BORE) FOR QMB139

NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS...