> Daniel '' Wrote:
> -------------------------------------------------------
> A lot of the rippiest +15hp scooter kits don’t have windows in the
> piston, most have a small notch on the intake side. With case induction
> you don’t need Swiss cheese out the piston, you’re gonna see more gains
> opening up the C transfers.
This is actually really true. Both the Athena 47.6 (MinaHor) and the Polini Evolution II 47.6 (Piaggio Pent.) I have are just solid pistons. The Athena is rated for 16hp, and the Polini for like 20hp. Also, the Polini has a nozzled exhaust.