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Home > Parts > GY6 50 High Performance Parts > GY6 50 70cc Big Bore Cam Gear Kit
GY6 50 139QMB Cylinder Kit with Head 70cc at 47mm
OK here it is the very affordable quality made complete head piston with rings, gaskets and cylinder for 70cc upgrade for your GY6 50 139QMB engine. A performance cam and gear set are also included for complete engine upgrade please remember to do clutch and variator plus exhaust also.
This is a true 70cc and is the quality Scootertronics puts out the door with no piston problems or parts missing. Need more power see our 80/85 kits with cams and air and jets.
Great kit that puts you where you need to be in traffic and not holding things up.
48 Lower States Only