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Your cart is empty.Dr. Pulley 18x14 Sliding Roller Weights for 125/150cc 4-stroke GY6 engines. Please select weight from drop-down menu. Select weight sizes now available in Black Pearl material: 10g, 11g, 13.5g, 14g. 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. Please see our Warranty & Returns Policy.
Justin meglich
Reviewed in the United States on December 9, 2023
I put these on my mad dog 150. They made a huge difference in acceleration and top speed. I’ve tried a different roller before but these sliders are great.
Pam Moore
Reviewed in the United States on September 12, 2020
This helped our go cart pull better up the hills with out shattering the belt.
Donny
Reviewed in the United States on December 2, 2015
Adds quite a bit more take off speed and climbs hills better with no real top end loss. way better than factory and easy to change
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