Dr. Pulley 19x15 Sliding Roller Weights Minarelli 1PE40QMB All-In-One axle spacer kit for

All-In-One axle spacer kit for a wide variety of vehicles

Upgrades your engine to 180

Pinion Assembly for 50cc 2-stroke 1DE41QMB engines

Fits a wide range of sizes and models

Dr. Pulley 19x15 Sliding Roller Weights Minarelli 1PE40QMB All-In-One axle spacer kit forDr. Pulley 19x15 Sliding Roller Weights for Aprilia Mojito, Aprilia Scarabeo 4T, Aprilia Sport City One, Aprilia Sr R Factory, Aprilia Sr Street, Piaggio Fly, Piaggio Typhoon, Piaggio Vespa and many more. 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