Function: You can get more RPM, power and speed without EGR. This GY6 cylinder rebuild kit upgrades your gy6 50cc 60cc 80cc to 100cc.
Content: The GY6 Cylinder Rebuild Kit includes 6 gram racing pure copper roller weights, cylinder head with 69mm valve, 50mm piston assy , 50mm bore cylinder block , 6pins racing AC CDI, racing 3-electrode A7TC spark plug, rocker arms assembly, valve seals, oil pump assy , engine gasket, set of intake manifold, muffler bolts, and exhaust locking hat , racing ignition coil, clutch small racing spring, racing clutch big spring