Timing chain is a kind of chain used in motorcycle engines to transmit the rotation of the crankshaft to the camshaft and maintain the appropriate opening and closing timing of the engine's intake and exhaust valves (also known as cam chain). In motorcycle engines, 6.35mm silent chain and bushing chain are often used as timing chains, and DID timing chain has excellent wear resistance, fatigue strength, smoothness and impact strength, so it is widely used both domestically and internationally, even in. motorcycle engines used in high speed range.