Dr. Pulley 16x13 Sliding Roller Weights for a Honda Ruckus, honda METROPOLITAN and also fits 50cc QMB139 gy6
this listing is for 8 grams
Dr. Pulley Sliding Roller Weights have exceptional durability, heat resistance and are low friction and low wear.
Dr. Pulley's U.S. Patent Number 7,276,004 states that their sliding 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.