bigger bore cylinder kits for gy6 engine are supplied by GROWSUN, ... parts and accessories Parts List:A. Turning: Wheel, tire & tube.B. Bearing: neck bearings, ball bearings.C. Exhaust: complete ... Others: air filters, silencer, timing adjuster, chain adjuster, valve oil seal, oil seal, spark plug, spoke, etcK. Engine: cylinder, piston kit ... for more details! gy6 performance parts of 100cc cylinder kits