COUNTER SPRING, POLINI

Molle di contrasto evo slider per variatori Polini
Codice: 243.095
The Polini contrast springs with EVO SLIDER designed with wear-resistant and self-lubricating material allow the Speed Drive mobile half-pulley to slip constantly. Polini has created contrast springs for the rear mobile half-pulley to adapt them to the additional load due to elaborate engines that deliver more power and torque. Polini contrast springs prevent belt slippage and consequent premature wear by applying a variable additional load of 10% for Maxiscooters and 7% (White spring) or 15% (Blue spring) for 50 scooters. in any case, mount this type of springs only if strictly necessary, the best performance will in fact always be obtained using the spring which, with less load, allows for optimal power transmission.
Features:
% increase: +17%
Spring load mm/Kg: 72/92
Number of turns: 6
Filament diameter: 6,7
Unloaded spring length: 166
Internal diameter: 72,5


APPLICATIONS OF THIS PRODUCT:
According to the data provided by the manufacturer, this article is compatible with the following brands, models and years:
GILERA GP 800
APRILIA SRV 850 ie 4T