Traditionally, gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of the Movable Drive Pulley (MDF).

Now the innovative Dr. Pulley Sliding Roller Weights slide up-and-down the ramp to change the gear ratio. This unique sliding movement (not rolling) provides exclusive advantages to increase CVT performance. With Dr. Pulley, no abnormal wear will occur even when running in high gear.

Supported Models

Honda Dio, Honda Elite 50, Honda Ruckus 50 (NPS50), QMB139 50cc/49cc


Size: 16×13
Set of 6

Broadens your range of gear ratios
Increases acceleration and re-acceleration properties
Increases top end speed
Lasts longer than standard roller weights
U.S. Patent Number: 7,276,004

Additional information

Weight.5 lbs

4.5g, 4g, 5g, 6g, 7g