Dr. Pulley 23x18 Sliding Roller Weights Handles Grips and Controls Cylinder Head for 50cc 2-stroke

Cylinder Head for 50cc 2-stroke Minarelli 1PE40QMB Jog engines

Front wheel assembly for the Razor MX500 and MX650 Dirt Rocket

Starter motor for 150cc and 125cc GY6 4-stroke QMJ152/157 QMI152/157 engines

Gates Powerlink Standard CVT Drive belt size 660-18-28

Dr. Pulley 23x18 Sliding Roller Weights Handles Grips and Controls Cylinder Head for 50cc 2-strokeDr. Pulley 23x18 Sliding Roller Weights for 250cc water cooled 172mm engines. Please select weight from drop down menu. Traditionally, gear ratio is changed by the up and down rolling movement of the roller weights in the ramp of the Moveable 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