bigger bore cylinder kits for gy6 engine are supplied by GROWSUN, good ... spare parts ,engine parts and accessories Parts List:A. Turning: Wheel, tire & tube.B. Bearing: neck bearings, ball bearings. ... , winker switch, etc.M. Drive, Chains & Sprocket: front hub, rear hub, hub cover, kick sprocket, oil pump sprocket, sprocket sitting, timing chain ... details! gy6 performance parts of 100cc cylinder kits