Motorcycle Glossary
Variator
In Turkish: Varyatör
In short
A variator is the pulley system in scooters and other CVT motorcycles that changes the drive ratio steplessly according to engine speed.
A variator consists of two pulleys. The front variator sits on the crankshaft; as revs rise, the variator rollers move outwards under centrifugal force, push the pulley halves together and make the belt run on a larger diameter. The rear pulley uses a spring and a torque cam to pull the belt to a smaller diameter. The ratio is therefore short when pulling away and gets taller as speed builds.
The system works together with the drive belt and the centrifugal clutch.
Symptoms of a problem
- Hesitation or sudden rev flares when accelerating
- Lower top speed and weaker pull
- Knocking or whining from the variator cover
These are usually caused by worn rollers and sliders or a worn belt, so the parts should be inspected together.
Also known as (including Turkish names)
- Ön varyatör
- Arka varyatör
- Kasnak
Related products
Front Variators
Last updated: October 9, 2026
