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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.
Jackson S.
Reviewed in the United States on June 2, 2024
Put these in my 2008 Yamaha C3, and it was a very easy installation all things considered and it's a noticable improvement, nothing crazy of course but definitely improves acceleration and top seed
BrainyJ13US
Reviewed in the United States on February 4, 2018
These are great. I gained 5 mph from these in my stock variator on my 2009 Honda metropolitan. Definitely worth it and easy to install of you got the right tools.
rjones35
Reviewed in the United States on October 3, 2017
Work a lot better if you pay attention and put them in correctly the first time. They will go in a couple different ways. Helped my pickup off the line in Yamaha c3.
Zak
Reviewed in the United States on September 22, 2015
Stellar performance on my Yamaha C3! 10/10 would do again. The cheapo, no-name rollers were garbage in comparison. Don't waste your money.
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