Piaggio / Minarelli Horizontal Clutch Spring Polini Evolution blue -8%

Blue clutch spring -8% for Piaggio / Minarelli Horizontal Polini Evolution

The contrast spring plays an important role in the variator adjustment. By exerting back pressure on the rear pulleys, it influences the variator shift.

The spring should be reinforced when the belt tends to slip, if the variator does not work continuously, or if the engine, despite lighter rollers, continues to run at a very low number of revolutions.
When changing the spring, the variator must be readjusted.