CVT Shims Polini 13x20mm Minarelli (0.25 / 0.5 / 1mm)

Polini CVT shims

The speed-up shims from Polini allow fine-adjustment of the CVT. The shims are placed between the CVT sleeve and the fixed pulley, thus extending the length of the CVT sleeve. This increases the distance between the movable and fixed pulley. The V-belt then has more space to run all the way down.

Lengthening can improve acceleration, shortening can increase top speed.

Dimensions of the variator control shims:

• Diameter: 13 x 20 mm
• Thickness: 0.25 / 0.5 / 1 mm