Scooter Roller Weights Increase your scooter's performance with a scooter roller weight kit. Replacing your stock scooter roller weights is an easy, inexpensive way to improve the performance of your scooter and we offer the best products on the market - Prima brand standard roller weights and Dr. Pulley slider sliding roller weights. A lighter scooter roller weight requires higher RPMs to push the rollers outward through centrifugal force and begin changing your CVT's gear ratio. Heavier scooter roller weights need lower RPMs to begin changing gear