
Reinforced spring for the centrifugal clutch, compatible with your moped equipped with a Sachs 504, 505, or 535 engine.
Among others, this helical spring is compatible with Hercules Prima M, 2, 3, 4, 5, Optima, and MX1 models.
The clutch spring is installed in the original centrifugal weight (Pony part number A4348). Compared to the standard spring, this one is 15% stiffer. Due to its stiffer design, the engagement point shifts to a higher RPM range. This makes the spring particularly well-suited for tuning performance-enhanced engines.
| Spring design | Tension spring |
| Ø wire | 1 mm |
| Total length | 110 mm |
| Material | Spring steel |
| Ø outside | 4.75 mm |
| Sachs | 504 (without pedal shaft) 505 (with pedal shaft) - 1A (AT) , 2A (HG) , 2B (HG) 535 |
| Hercules | Great - 2 , 3 , 4 , 5 , Optima MX 1 |
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