The diameter of the intake area is tapered down gradually to reduce the initial suction required to start air flow and increase air flow velocity. This is very helpful in 70cc engines where suction is not very high to begin with. The air flow is directed into a resonance chamber via a Venturi insert, this resonance chamber has the combined advantage of reducing intake noise and fuel vibration - the carburetor will run more smoothly and can be adjusted a lot easier.
The Doppler Air Filter "Venturi" is suitable for 12mm - 21mm Dell'Orto and 12mm - 24mm Arreche carburetors; it comes with a second insert for 19-21mm carburetors.
Available in 5 colours: blue, red, black, silver and white. Foam and screens come in different colours as well.
Blue case / red foam / chrome screen.
|Doppler Air Filter "Venturi" blue body/red foam/chrome screen|
|Product Family||Air filter|
|Product type||Air filter|
|Air filter connection||39mm|
|Color||Blue case / red foam|