Primary gear on crankshaft - Pinasco
The Pinasco gear replaces the original primary gear and since the wheel is two teeth larger (16T), you achieve both higher top speed, but also fewer revolutions at the same speeds as before. This will of course affect the traction, but you get a quieter engine and at the same time the fuel consumption decreases at the same speed, as the speed is lower.
Click here to see guide on how to change the wheel (German)