Dr. Pulley 4gm 16x13 Sliding Weights For Scooters With 50cc Qmb139 Motors on 2040-parts.com
Denver, North Carolina, United States
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DR PULLEY PERFORMANCE 4 GRAM SLIDING ROLLER WEIGHTS
 Dr. Pulley 16x13 SLIDING Roller Weights for 50cc 4-stroke QMB139 engines. 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 Round Roller Weights roll up and down the ramp to change the gear ratio. This unique rolling movement provides exclusive advantages to increase CVT performance. With Dr. Pulley, no abnormal wear will occur even when running in high gear. We recommend starting performance upgrades by changing the variator roller weights first. Heavier roller weights= A slower take off speed with more acceleration and a higher top speed. Lighter roller weights = A faster take off speed with less acceleration and lower top speed
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