Polini Evolution #6 Exhaust will fit on a Piaggio Zip SP LC 2000. One is on mine, but you have to remove the side stand. From my findings most persons Winning out there say the Polini motor is the Fastest!!!!!!!!
Here are my choses for exhaust for 70cc competition racing using a Piaggio motor. I have tried them All using a Kehlin 28mm Carburetor.
1. Polini Evo #7
2. Polini Evo #6
3. Metrakit Pro Race
4. Hebo Racing 11
5. Malossi MHR 2000 Race Team
6. Pinisco
7. Bidalot
8. Turbo Kit
Most of the time it depends on your set up.
Added Speed