Venturi air filter from DOPPLER for smoothing the intake and for clean carburetor tuning.

The Venturi air filter from DOPPLER works with a tapered cross-section towards the carburetor: Due to the negative pressure in the crankcase, the mixture is accelerated and flows faster - similar to a jet of water from a garden hose when the passage is slightly squeezed shut. At the same time, the intake noise is significantly reduced and the carburetor can be tuned cleanly. The air passage can be easily enlarged if required and is then ideal for converting to 19-21 mm carburetors. The filters are inclined and fit all DELL'ORTO/ARRECHE carburetors from 12 to 21 mm.