torque spring POLINI Evo-Slider +15% for Piaggio

This Polini compression spring increases the force by 34% over the original and is therefore ideal for tuning applications. The compression spring presses the rear variator pulley against the belt, determining how the variator shifts. Replacing the compression spring with a stronger one is necessary if engine power is increased through tuning, especially if the pulley begins to slip or the engine fails to stop. The variator is highly dependent on the compression spring, so it must always be adjusted when the spring is exchanged for another. Original spring strength: 65-70mm/kg. Polini spring strength: 65-94 mm/kg. Wire thickness 6.2mm. Overall length: 128mm. Internal diameter: 58mm. Number of windings: 5.5.