Torque clutch (+34%) - blue - Kymco AK 550 E4 ('17-'20) / Sym Maxsym TL 500 ('20->) - Polini

Torque spring (+34%) Polini for the following applications: Kymco AK 550 E4 (2017-2020) / Sym Maxsym TL 500 (2020->).

The torque spring improves the calibration of the transmission. A stiffer spring helps the belt transmit the scooter's engine power to the wheel. It increases engine RPM, making take-offs incredibly quick. Made 100% in Italy.

Features:
- Pressure increase percentage: +34%;
- Polini spring load: 65 mm / 94 kg;
- Original spring load: 65 mm / 70 kg;
- Number of coils: 5.5;
- Spring wire thickness: 6.2 mm;
- Total length: 128 mm;
- Inner diameter: 58 mm;
- Color: blue.