Steel sprocket Gas Gas EC 125 01-16 / Yamaha YZ 125 87-04 Z-13 JT Sprockets

Front sprocket Gas Gas EC 125 01-13 Yamaha YZ 125 88-04 Z-13 520 JT Sprockets

The JT steel sprockets are manufactured using only the finest grade of high carbon C49 steel for the sprockets and rear sprockets, and SCM420 chromoly steel alloy for the front sprockets.

High-quality front sprocket from the manufacturer JT Sprockets. The gear ratios on geared motorcycles are extremely important to get the most out of the engine.

If the gearing is too long, you may not be able to take full advantage of the engine's power, and if it is too short, the same can happen. Normally, you should follow certain guidelines to choose them.

A front sprocket with a higher tooth count will give you more top speed but you will lose torque; by reducing the tooth count of the front sprocket, you will have more torque but less top speed.

In the case of the rear sprocket it is completely different: if it has more teeth it means a shorter gear ratio (higher RPM), whereas if it has fewer teeth it means a longer ratio (more top speed).