CG125 motorcycle piston set, provide 56.5MM, 62MM, 63.5MM cylinder diameter, with 13MM/15MM pin diameter and corresponding ring groove size, completely match the cylinder/connecting rod of CG125 engine with different displacement, directly replace the original piston assembly; Including piston, piston ring, piston pin, precise matching of parameters between components, no need to purchase accessories separately, suitable for engine overhaul/maintenance scenarios; The piston is made of aluminum alloy forging process, the piston ring is made of alloy cast iron + chromium plating/molybdenum spraying material, and the piston pin is made of high-strength steel, which is resistant to high temperature and wear, and suitable for the high-load working condition of the engine. The matching clearance between piston and cylinder and the side clearance of piston ring are strictly in line with the original factory standards. No additional debugging is required after installation to ensure smooth piston movement and reliable sealing. The new components can restore the air tightness of the combustion chamber, solve the problems of insufficient power and increased fuel consumption caused by the wear of the old piston, and return the engine performance to the best state.