Starter Clutch, Starter Chain, Timing Chain & Gears - 125cc 54mm ATVs & Dirtbikes

Starter clutches, starter chains, timing chains, and internal gears are key components that keep 125cc 54mm ATVs and dirt bikes starting smoothly and running in proper rhythm. When these parts wear out, riders may experience grinding, slipping, or poor engine timing. This collection provides the essential internal drive components needed to restore reliable operation on Honda-type 125cc 54mm engines.