These roller weights fit most 50cc scooter scooter variators. They measure 15x12mm and will work with most stock variators.

By changing your rollers you can increase power and acceleration of your scooter. Most scooters come stock with too heavy of rollers. This is a way that the manufacture can restrict the performance of your scooter. By doing this simple mod of changing out your rollers you can unlock some hidden power of your scooter