Dr. Pulley 18x14 Sliding Roller Weights reds it automatically adjusts output between

it automatically adjusts output between 1

Finish: Gold anodized aluminum with PTFE-coated roller tracks

and 30mm venturi sizes — select from the dropdown

Fits: Vespa GTS 250 / 300

Dr. Pulley 18x14 Sliding Roller Weights reds it automatically adjusts output betweenDr. Pulley 18x14 Sliding Roller Weights for 125 150cc 4 stroke GY6 engines. Please select weight from drop down menu. Select weight sizes now available in Black Pearl material: 10g, 11g, 13. 5g, 14g. 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