CG125 motorcycle valve set, including intake valve (disc diameter 25MM), exhaust valve (disc diameter 30MM), size parameters (rod diameter 5.5MM, groove diameter 4.7MM, etc.) with CG125 valve system completely match, directly replace the original valve without modification; The valve rod is made of high quality alloy steel, and the surface of the valve disc is hardened to resist carbon deposition and high temperature corrosion, which is suitable for frequent opening and closing of the engine under high load conditions. Valve disc and valve seat bonding surface through precision grinding, to ensure the combustion chamber air tightness, reduce power loss, improve engine efficiency; It is the core replacement component for valve system failure (such as lax valve seal and ablation), and is suitable for deep overhaul of engine valve system.