the gears are for YAMAHA motorcycle 125cc---scotter gears This series of gears are used on scooter engines, it carries out ... made according to the technical requirements for Yamaha models---including scotter gearsspecifications:1) Modal: 1.25 - 1.75mm2) Material: alloy-carburized steel3) Main processing ... ) Main customer: GM, TRW, ZF, DANA, Ford, MAGNA, BorgWarner, HONDA, YAMAHA, SUZUKI, etc.