Dr. Pulley makes some of the best performing variators, clutches, and roller weights in the world.  This variator will maximize your your stock scooter or performance scooter's performance. 

Variator kit includes Back Plate with spacers, Drive Face, Pulley, Pulley Spacers, and Drive Boss. 

This kit will accept 20x12 rollers or you can get the Dr Pulley Sliding rollers

Dr. Pulley Rollers