Contrast spring for Polini variatorsCode: 243.043Polini 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 spring 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. Features: - Specific for: Aprilia SR50 R-Factory Motore Piaggio 2T water cooled
Spring features 243.047 - % increase: -8%
- Spring load mm/Kg: 50/26
- Number of turns: 6
- Filament diameter: 4
- Discharged spring length: 108
- Internal diameter: 49,5
Spring features 243.046- % increase: -30%
- Spring load mm/Kg: 50/20
- Number of turns: 6
- Filament diameter: 4
- Discharged spring length: 96
- Internal diameter: 49,5
|
