Timing chain is used in motorcycle engines to transmit the rotation of the crankshaft to the camshaft and maintain the proper opening and closing timing of the intake and exhaust valves of the engine (also called a cam chain).
In motorcycle engines, 6.35mm pitch silent chains
and bush chains are generally adopted as timing chains. DID timing
chains have excellent wear resistance, fatigue strength, quietness, and
impact toughness. Therefore, it is also used in motorcycle high-speed
range engines both in Japan and overseas.