Torque spring Polini Evo-Slider +87% for Minarelli

Description

The Polini Evo-Slider contra spring increases pressure by 87%, making it ideal for tuned Minarelli engines. The stiffer spring provides higher pressure of the rear pulley on the drive belt and ensures correct and stable variator shifting. In tuning applications, this is crucial as it prevents the engine from running at excessively high RPM or losing power.

Since the contra spring directly affects variator operation, the new spring must always be properly matched to the transmission setup.

Technical data:

Original spring stiffness: 45/20 mm/kg
Polini spring stiffness: 45/37.5 mm/kg
Spring thickness: 3.8 mm
Overall length: 106 mm
Inner diameter: 46 mm
Number of coils: 5

An excellent choice for improved throttle response, stable shifting, and optimal power transmission on tuned engines.