YBS300 Motorcycle 76mm Cylinder Kit Cylinder Block Piston Ring Pin Gasket For 4-stroke Water-Cooled Engine Motocross This cylinder kit is designed for 4-stroke water-cooled engines used in motocross applications.It includes a 76mm cylinder block, piston, piston rings, wrist pin, and gasket set.The components are engineered to fit standard YBS300 engine configurations and provide performance for off-road motorcycles.The cylinder is constructed to support efficient heat dissipation, and the piston ring set proper compression and oil control.This kit is intended for use in engine rebuilds or performance where precise dimensional compatibility is required. This component is not from the brand.References to models are used only to indicate fitment.