Contrast springs Big Evolution kit for Polini variators

Code: 243.101

Polini has created contrast springs for the rear movable 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 optimal power transmission. This kit consists of 2 springs

Features:

• Specific for: Malaguti F12 50 Phantom LC 1994> 2T water cooled

Spring features

• % increase: 8%
• Spring load mm/Kg: 50/30
• Number of turns: 5,5
• Filament diameter: 4,4
• Discharged spring length: 90
• Internal diameter: 48,5
• NB: If used on Yamaha engines, it can only be mounted in conjunction with the Polini Speed Drive.