POLINI EVOLUTION thrust spring for PIAGGIO CIAO BOSS - BOXING - BRAVO - CBA - ECO - GRILLO - SI

Ideal for hardening the opening of your corrector when you have a racing variation and a motor that speaks in the higher regimes than your original engine, here is the POLINI EVOLUTION thrust spring steel Ø4mm painted blue. They allow better performance in terms of variation in combination of a powerful engine and a sport variation!