torque spring Malossi yellow +30% for Piaggio Bravo, Boss, Ciao, Grillo, SI M.297009Y0

Reinforced torque spring Malossi for Piaggio and Vespa scooters.
Replacing the spring is necessary when tuning engines, the idea is to prevent the initial response from the variator therefore increasing the engine speed, the the increase power with delayed engagement will increase the power at pull off.
Useful for tuned scooters or if you are having problems with slipping belts.
Simply replace the original.