Remote air filter system based on the bgm PRO intake hose and a Marchald foam air filter.
bgm PRO intake hose with increased volume in front of the carburetor compared to the original intake hose. The intake hose is available with four different connection sizes at the carburetor: 40 mm (e.g. Dellorto PHBL 25), 42 mm (Dellorto PHBH 28-30), 45 mm (Mikuni TM24 and Jetex SH22) or 50 mm (Keihin PWK 28, Polini 28 - 30).
On the diagram in the downloads section is a direct comparison between the Lambretta dl/GP standard intake hose and the bgm. The comparison was made with Racetour cylinder 225, 58 mm stroke, Keihin 28 PWK, bgm air filter box and the bgm big box exhaust. The omission of the air filter box brings here again a clear increase in performance.
Another big advantage of the bgm PRO intake hose is the lower outlet. Here the spit back from the carburetor is not collected in the hose and the idle system can therefore not clog.