Traditionally, the gear ratio in scooter CVTs is changed by the in-and-out rolling movement of the roller weights. With the innovative Dr. Pulley sliding roller weights, the roller weights “slide” inward and outward in the Movable Drive Pulley (MDF) to change/extend the gear ratio.

Dr. Pulley sliding roller weights provide the following advantages over traditional "rolling" roller weights:


Eliminate abnormal wear in the high gear position.
Enjoy a broader range of gear ratios.
Experience outstanding acceleration and re-acceleration properties.
Retain explosive low end acceleration and reach higher top speeds.
Last longer than traditional roller weights while experiencing excellent CVT variator performance.


Dr. Pulley Roller Weights The latest roller weights to hit the market and the most advanced weights available. These sliding rollers perform up to 20% better than standard round weights and last up to 18% longer with 22% less performance material loss. The weights have several unique features such as their composite material being nylon for faster performance.
Made of unique tribological material SL-9T and SL-9TS (oilless PA46)
Low friction coefficient / Low wear / High temperature resistance
Aluminum compatible; No abrasive fibers (glass fiber or carbon fiber)
Fastest Roller Weights available