
POLINI Clutch Spring – Manufacturer Ref. 243.114
Polini Evolution compression spring designed for CVT gearboxes on Piaggio engines and derivatives. High preload version of 36 kg, intended for scooters where a firmer setting of the centrifugal clutch is desired. Ideal for fine-tuning the engagement range, adapting the variator response to engine modifications, or for more demanding riding in urban and suburban environments.
This spring is aimed at riders who want to adjust the secondary transmission without modifying the internal components of the variator. Compatible with many Piaggio engine scooters (non-exhaustive list). Common fitment examples: Vespa Sprint 4T EURO 5 (2025), Piaggio ZIP S 50 4T EURO 5 (2025), Aprilia SR 50 R (2022).
WARNING: on some Yamaha engines, use requires pairing with the Polini Speed Drive.