Item# Dr--Pulley-16x13-Sliding-Roller-Weights-7g

Dr. Pulley 16x13 Sliding Roller Weights-7g

By Gas Scooters

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$19.69

$29.99 Price with Coupon $19.69

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About Dr. Pulley 16x13 Sliding Roller Weights-7g

img-qind.JPGDr. Pulley 16x13 Sliding Roller Weights for 50cc 4-stroke QMB139 engines. Please select weight from drop-down menu.

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.

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