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.

These roller weights fit many 50cc scooters including the Honda Ruckus, Honda Elite LX SR (SA50), Honda Metropolitan (CHF50), and the Yamaha Zuma.

⚠ WARNING California Residents: Proposition 65 Warning