Polini clutch springs engineered to restore low-end power on tuned engines.

Modified powerplants shift peak performance to higher RPMs, leaving acceleration sluggish at lower speeds—these variable-rate springs compensate by engaging the clutch progressively across the rev range.

Set includes 4 springs in 3 different strengths, designed for original clutch baskets. Pairs exceptionally well with performance exhausts to unlock full potential of your build.

Fits Piaggio NRG / Typhoon, Piaggio / Gilera 2-stroke 50cc, and Aprilia 4-stroke 100cc models.