17 Tooth Front Sprocket for T-REX 50cc ~ 125cc (420) Description

Front sprocket for T-REX 50cc, 90cc and 125cc.

It can be mounted on the following T-REX :
- Skyteam 50cc (ST50),
- Skyteam 125cc (ST125)

Dimensions:
- Tooth: 17,
- Chain pitch: #420

Tip:
- When mounting a smaller front sprocket (less tooth), the engine will be more responsive and the maximum speed will decrease.
- When mounting a bigger front sprocket (more tooth), the maximum speed will increase and the responsiveness of the engine will decrease.