CG125 motorcycle copper seal ring, with outer diameter of 4cm and inner diameter of 3cm, is fully matched with the installation position of the corresponding parts of CG125. The original seal ring is directly replaced without adjusting the assembly structure. High quality brass material, both good sealing and wear resistance, high temperature resistance, corrosion resistance, suitable for engine, gearbox and other parts of the sealing conditions; The ductility of copper material can closely fit the assembly surface, effectively prevent oil and gas leakage, and ensure the normal working environment of components; Can be used for CG125 engine cylinder head, transmission interface and other parts of the seal, strong versatility.