Dr. Pulley 16×13 Sliding Roller Weights

Dr. Pulley 16x13 Sliding Roller Weights for 50cc 4-stroke QMB139 engines. Please select weight from drop-down menu. The following sizes now come in Black Pearl material: 5g, 6g, 6.5g, 8g. Please see photo gallery for an example. Traditionally, gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of the Movable 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.
Size: 16x13
Set of 6
Available in 3 Gram Through 11 Gram Weights, Including Half Gram Weights
Broadens your range of gear ratios
Increases acceleration and re-acceleration properties
Increases top end speed
Lasts longer than standard roller weights
U.S. Patent Number: 7,276,004
Please Note: Weight Color May Vary
SUPPORTED MODELS: Fits and compatible with Honda Dio, Fits and compatible with Honda Elite 50, Fits and compatible with Honda Ruckus 50 (NPS50), QMB139 50cc/49cc