With Moto GP styling, the Torsen WD swing arm is designed to stiffen the engine case therefore avoiding flexing which could lead to cracking. The addition of a bearing to support the axle further reduces flexing and stress and according to Polini, improves transmission efficiency. The system also improves stability when riding and cornering as well as reducing asymmetric tyre wear.
The Torsen WD is suitable for both track use and road use and can be fitted exclusively together with the new Big Evolution exhausts or the Polini For Race 2 and Scooter Team homologated exhausts.
Fitment: Piaggio engines (both short and long engine cases). Minarelli engines, CW series with vertical cylinder, MY series (air cooled) and MA series (liquid cooled) with horizontal cylinder and long case.