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Your cart is empty.Dr. Pulley 15x12 Sliding Roller Weights for Minarelli 50cc 2-stroke engines. Please select weight from drop-down menu. These weights also fit many scooters from fits and compatible with Yamaha including Zuma CW50, Zuma 50F, Vino and C3. Select weight sizes now available in Black Pearl material: 5g. Select Weights on Sale: 8.5g, 9.5g, 10.5g. Traditionally, gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of the Moveable 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. Dr. Pulley's U.S. Patent Number 7,276,004 states that their sliding roller weights eliminate abnormal wear, prevent reduction gear ratio deterioration, prolong the useful life of the transmission, and have the availability to adjust reduction gear ratios as well as driving performance. At the same time, Dr. Pulley Sliding Roller Weights are also adapted to compensate wear automatically, to adjust by itself to move further outward in a movable drive pulley half and to make the vehicle reach a higher maximum vehicle speed. Please see our Warranty & Returns Policy.
Peyton Schmidt
Reviewed in the United States on April 12, 2024
Just purchased these for my 2019 Honda Ruckus. Acceleration is slower than stock, but it didn’t sound like the engine is working nearly as hard to get up to speed which is what I wanted. Definitely will be buying these again when they wear out. Worth the $
Bag was half full
Reviewed in the United States on August 8, 2023
These weights are far and away better than the round stock weights. I was skeptical at first, however after installing these, the performance improvement was undeniable. My 50cc zuma accelerates more smoothly and achieves a higher top end. You do sacrifice some climbing speed and off the line speed. But I was more interested in top speed any way. Totally recommend
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