Dr. Pulley 18x12 Sliding Roller Weights Options:9G Experience a revolution in CVT

Experience a revolution in CVT performance with the Dr

Make Model Years Notes Yamaha Zuma 125 (YW125) 2009–2015 Pre-2016 body style only Yamaha BW's 125 2009–2015 International models

forged aluminum assembly designed to reduce rotational mass and significantly improve throttle response

Electronic items are non-returnable Compatible with Razor Part #: W13114501164

Rings - Set of 2

Dr. Pulley 18x12 Sliding Roller Weights Options:9G Experience a revolution in CVTDr. Pulley 18x12 Sliding Roller Weights. These weights fit the following: Yamaha: Snosport 125 (Snoscoot), XC125 (Riva Beluga, may require 8pcs), Cuxi 115 Stella: Automatic 125 Please select weight above. 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.