76mm Air Cylinder Block Piston Ring Piston Pin Card Lower Gasket Set Motorcycle Cylinder Kit For YBS300 Engine Parts This kit includes a cylinder block, piston ring, piston pin, card, and lower gasket designed for use with YBS300 engines.The components are engineered to fit 76mm air cylinder configurations and provide essential parts for engine assembly or repair.Suitable for motorcycle applications requiring replacement or rebuilding of the cylinder unit.Each in the set is constructed to meet standard specifications for and function within the engine system.Compatibility Statement: This is a third-party replacement.Brand/model references serve only as compatibility indicators.