Polini "Big Valve" Minarelli Vertical / Zuma Prebug Intake
Polini put together a nice combo for the Zuma Prebug and engineered a intake with a much larger area resulting in more HP for your engine.
Fits: Dellorto 17.5-21mm carburetors
For even more flow you can upgrade to the V Force 3, 8 petal reed !