60CC Cylinder Piston Gasket Kit compatible with Simson S51, SR50, KR51/2, and S53.Material: Aluminum Engine Type: 2-stroke Displacement: 60cc Bore Size: 41mm Piston Pin Diameter: 12mm Compatibility: Simson models S51, SR50, KR51/2, S53 Includes: Cylinder, piston, rings, piston pin, circlips, and gasket kit This kit provides all components required for a complete engine rebuild and serves as a direct replacement for issues such as low compression, cylinder damage, or piston wear.Installation requires no modifications to the engine case and is designed for straightforward integration to support consistent engine function.