# Variator rollers

> Variator rollers are cylindrical weights in the front variator that move outwards under centrifugal force and increase the belt's running diameter.

- **Also known as:** Varyatör ağırlığı, Rulo ağırlık, Roller weights
- **Turkish term:** Varyatör bilyası
- **Category:** [Variator Rollers](https://motorsikletparcasi.com/en/category/variator-rollers)
- **Page:** https://motorsikletparcasi.com/en/glossary/variator-rollers

Rollers are specified by diameter × width in millimetres (e.g. 16 × 13, 20 × 12) and by weight in grams; the size is model-specific. Roller weight decides at what engine speed the variator "shifts up".

- **Lighter rollers:** the engine stays at higher revs; launch and roll-on acceleration improve, fuel use may rise.
- **Heavier rollers:** the ratio gets taller at lower revs; cruising is calmer and pulling away is softer.

Over time the rollers develop flat spots and become uneven, which causes jerky acceleration. Always replace them as a set, together with the sliders.

## Related terms

- [Variator](https://motorsikletparcasi.com/en/glossary/variator): A variator is the pulley system in scooters and other CVT motorcycles that changes the drive ratio steplessly according to engine speed.
- [CVT drive belt](https://motorsikletparcasi.com/en/glossary/cvt-drive-belt): A CVT drive belt is the V-section, cogged rubber belt that carries power between the front and rear variator pulleys of a scooter.
- [CVT (continuously variable transmission)](https://motorsikletparcasi.com/en/glossary/cvt): A CVT is the automatic transmission used in scooters that varies the drive ratio continuously with variator pulleys and a belt, without fixed gears.

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- Source page: https://motorsikletparcasi.com/en/glossary/variator-rollers
- Last updated: 2026-10-09
- Türkçe sürüm: https://motorsikletparcasi.com/sozluk/varyator-bilyasi.md
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