Arc of counterpressure variomatic clutch black - Aprilia SR 50 LC Funmaster / SR 50 LC Street / SR 50 R LC Ditech Factory - JM

- Athena variomatic pressure spring;
- Black spring: 30 KG;
- A harder pressure spring results in a later movement of the converter, leading to better engine traction;
- When using a sports exhaust, it may be beneficial to use a harder pressure spring for better acceleration;
- Installing lighter variator weights and a harder pressure spring may have a negative effect. Please try them individually;
The different spring resistances vary by color, which indicates the differences in kilograms pressing on the converter:
- Blue: 22 KG Usage: original replacement for lightly tuned engines;
- Yellow: 27 KG Usage: lightly tuned engines up to 10 HP;
- Red: 32 KG Usage: heavily tuned engines over 10 HP;
- Green: 25 KG Usage: original replacement up to lightly tuned engines;
- Black: 30 KG Usage: lightly tuned engines up to 10 HP;
- Purple: 35 KG Usage: heavily tuned engines over 10 HP.

The complete application list can be found below.