Torque spring POLINI Evo-Slider +87% for Minarelli

Polini springs that increase pressure by 87% and are therefore ideal for tuned engines. The springs press the gear on the rear converter onto the belt. They also create pressure to shift the variator. A lighter pressure is required once an engine has been tuned to prevent it from moving into a dangerously high rev range. The pressure of the springs is closely tied to the variator. If a spring is fitted, it must be matched to the variator. Original spring rate: 45/20mm/kg. Polini spring rate: 45/37.5mm/kg. Spring thickness: 3.8mm. Total length: 106mm. Internal diameter: 46mm. Number of coils: 5.