Replace a worn sprocket or precisely adjust the character of the drivetrain
The rear sprocket transfers the engine power to the rear wheel via the chain. Wear, material choice, and the number of teeth therefore have a direct impact on the drivetrain’s performance. In this collection, you’ll find model-specific rear sprockets for replacement, performance upgrades, and quick-change systems.
When choosing a rear sprocket, you need to check more than just the motorcycle model. The chain size, number of teeth, pitch circle, number of mounting holes, and the sprocket carrier used must all match. For example, a sprocket designed for a quick-change carrier will not automatically fit the original sprocket carrier.
A rear sprocket with more teeth shortens the final drive ratio. This makes the bike respond more strongly to the throttle and accelerate more easily, but it will run at higher RPMs at the same speed. The theoretical top speed will be lower.
With fewer teeth at the rear, the drive ratio becomes longer. The RPM at a given speed decreases, but the engine may feel less powerful during acceleration. The ultimate effect also depends on the front sprocket, engine power, gearbox, and tire size.
The chain and both sprockets must be the same size. A 520 chain belongs with 520 sprockets and cannot be correctly combined with a 525- or 530-rear sprocket. When you change the number of teeth significantly, a different chain length may also be required.
When replacing a worn drive set, it’s best to replace the chain, front sprocket, and rear sprocket as a complete set. A new chain on clearly worn sprockets will wear out faster and run less smoothly.
Lightweight Aluminium rear sprockets are popular for sporty motorcycles and track use. They reduce rotating mass but can wear faster than heavier steel sprockets depending on use and maintenance. Proper chain tension and regular lubrication remain important.
A quick-change system allows faster switching between different sprocket ratios. Note that the corresponding sprockets may be specifically developed for the particular quick-change carrier.
