This series of motorcycle gears are used on motorcycle, it's for 100cc, 110cc, 125cc

This series of motorcycle gears are used on motorcycle engines, it carries
out transmission functions. Suitable for 100cc, 110cc, 125cc and
150cc motorcycles made according to the technical requirements
for Honda, Suzuki, and Yamaha models.

Specifications:
1) Modal: 1.5 - 2mm
2) Material: alloy-carburized steel
3) Main processing: precision hot and cold forging, precision
machining and extrusion pressing
4) Heat treatment: carbonitriding, case depth 0.3~0.6mm
5) Good wear resistance and high strength
6) High precision and low noise