torque spring MALOSSI yellow +30% for Piaggio ZIP, inner diameter 53.5mm, outer diameter 6

Reinforced counter-pressure spring for the rear converter from Malossi.
The counter-pressure spring increases the contact pressure on the V-belt, preventing it from slipping and increasing traction on the belt.
Useful for tuned vehicles and problems with slipping belts.
Easily replace with the original. 30% harder than the OEM spring.
Dimensions:
Inner diameter: 53.5mm
Outer diameter: 61.60mm
Height: 138mm
Wire diameter: 3.9mm
Spring hardness: 2.4