Description
Drive Pulley Polini Evolution P.R.E. 12.5° Piaggio
We offer an oversize drive pulley with a 12.5° angle and fixed fan blades for Polini P.R.E. / Evolution engines. The pulley was specifically developed for high-performance Polini P.R.E. setups, but it can also be used in other tuning transmissions.
Advantages Polini Air Speed
The pulley has an increased diameter of 115 mm and is made from anodized aluminum alloy. Its cooling fins are aerodynamically shaped and face backward. This design increases airflow through the variator and transmission area by up to 30%, especially at high engine speeds between 13,000 and 15,000 rpm.
In addition, the power absorbed by the crank mechanism is reduced by 5%. This keeps engine power consistently at the highest level while ensuring maximum efficiency.
Also available as a fan wheel with a 14° angle.
Note: The pulley has no teeth for the electric starter. The engine can only be started using the kickstarter.
Specs Polini P.R.E. Pulley
- CNC oversize pulley + fan
- Outer diameter: 115 mm
- Pulley face angle: 12.5°
- Material: aluminum
- For Piaggio 50cc 2T/4T from 1998 onward
CVT Pulleys
Pulleys are an integral part of the CVT system on scooters and mopeds with automatic CVT transmission.
The continuously variable transmission consists of fixed and moving pulleys, the V-belt rises and falls between them depending on the engine speed, changing the speed of the vehicle.
When should you change a pulley?
There are two reasons for replacing pulleys:
- Wear and tear. Although pulleys are relatively durable, the constant sliding of the V-belt can deform the surface.
- Tuning. Different pulley angles and diameters can improve the handling of scooters or mopeds.
Note: A CVT variator can only do a good job when CVT pulleys as well as torque drive pulleys are compatible with each other. Pitches and diameters of the individual elements must be matched so that the V-belt can glide evenly.
| Front Pulley / Fan Polini Air Speed Evo Piaggio 12,5° | |
|---|---|
| Article no. | P244.0132 |
| EAN | 8054705126796 |
| Weight | 0,38 kg |
| Series | Evolution, P.R.E. |
| Brand | Polini |
| Product type | Pulley |
| Range | Oversize |
