CVT Rear Pulley Speed Drive Evolution 3 Piaggio NRG / Zip

With the Evolution 3 line, Polini introduces a fully revised transmission series. The torque drive and pulley halves are now made almost entirely of aluminum, significantly reducing weight compared to previous versions. A version with ceramic coating is also available, designed to reduce power loss thanks to its durable, rough surface.

• Brand: Polini
• SKU: U244.0573
• Availability: In stock

rear pulleyThe torque drive, also called secondary or driven pulley, is an integral part of the automatic transmission on scooters. It is the counterpart to the variator or front pulley and forms the rear drive unit. The rear pulley is located at the rear of the CVT housing and forms a unit with the clutch. As with the front pulley, there are also tuning versions of the rear pulley.Working of a CVT transmissionThe front and rear pulley (variator and torque driver) work together and are interdependent. At idle, the V-belt rides on its highest position on the rear pulley and on its lowest position on the front pulley. When you accelerate and engine speed increases, the drive pulley in front tu