SSP-G 180cc Big Bore Power Kit for 150cc and 125cc 4-stroke GY6 Engines.

This complete Power Pack comes with a 63mm cylinder and matching crankcase with all of the oil seals installed. This means there is no machining required unlike all other kits on the market.

Includes the following: 63mm cylinder, piston, rings, pin, clips, Super HP 2-valve head, valve cover, camshaft, rocker arm assembly, cylinder mounting studs, complete gasket set, bushings for right-hand and left-hand cases, and bearings.