YBR125 motorcycle piston assembly, piston size perfect match 54MM cylinder diameter cylinder, with piston pin + spring, direct assembly without additional parts, the suitability of 100%; High strength forged aluminum alloy, the top of the piston is anti-knock treatment, the skirt is covered with wear-resistant coating, high temperature resistance, deformation resistance, suitable for the high pressure condition of the combustion chamber; Piston ring groove machining precision up to micron level, closely fit with the piston ring, greatly reduce the cylinder leakage rate, ensure the engine compression ratio and power output; It is the core replacement part for cylinder wear and piston damage, suitable for cylinder overhaul scenario, saving the time of decentralized procurement.