Dr. Pulley 17x12 Sliding Roller Weights Genuine RoughHouse Sport Two Thread Sizes Available: Choose

Two Thread Sizes Available: Choose M8x1

*It is possible to install this spacer 180 degrees reversed

Zhejiang Riya Motorcycle Co

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Dr. Pulley 17x12 Sliding Roller Weights Genuine RoughHouse Sport Two Thread Sizes Available: ChooseDr. Pulley 17x12 Sliding Roller Weights for Aprilia SR50 & SR Di Tech, Derbi Atlantis, Italjet Formula Lc, Malaguti Ciak and many more. All Weights on Clearance! 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.