How to determine the size?
Front Sprocket
The front sprocket is fitted to the drive shaft. The shape and size of the drive shaft is motorbike specific. One should always look for the same shape otherwise the new sprocket won't fit.
The size of the sprocket is determined by the number of teeth.
The other important spec is the pitch which is the length and distance between the teeth. The most common pitches are 420, 428, 520, 525 and 530.
The pitch and the number of teeth is always shown on the sprocket, however if for some reason it is not visible, you can also count the number of teeth and take the pitch from the rear sprocket or the chain.
Pro Tip: The pitch must be the same for the sprockets and the chain.
Rear Sprocket
The rear sprocket is on the rear wheel connected to the wheel hub. The fitting holes size and position are motorbike specific.
The size of the sprocket is determined by the number of teeth.
The other important spec is the pitch which is the length and distance between the teeth. The most common pitches are 420, 428, 520, 525 and 530.
You will also find these numbers printed on the sprocket.
Drive Chain
The chain connects the 2 sprockets and transfers the power to the rear wheel.
The pitch, which is also printed on the side plates, refers to the distance between the rollers.
The length is the number of chain links.
User specific chains are available for special needs (i.e. quad/ATV, trial, race etc).
Pro Tip: To make sure that you buy the right length, it is recommended to count the number of teeth starting from the connection link.
