torque spring POLINI -30% for Piaggio

Polini springs that reduce pressure by 30%, making them ideal for lightly tuned engines. The springs press the gear on the rear converter against the belt. They also create the pressure needed to shift the variator. Lower pressure is required once an engine has been tuned to prevent it from reaching a dangerously high RPM range. Spring pressure is closely linked to the variator. If a spring is fitted, it must be matched to the variator. Original spring weight: 50/28mm/kg. Polini spring weight: 50/20mm/kg. Spring thickness: 4mm. Total length: 96mm. Internal diameter: 49.5mm. Number of coils: 6.