Suction device for internal combustion engine

A compact suction device is provided for an internal combustion engine, e.g. a V-type engine. The suction device comprises a casing (21) having an air inlet and a plurality of outlets, a filter (3) in the casing for filtering air from said air inlet, a collection chamber(10) in the casing for receiving air from the filter, at least one throttle valve (8) in the casing for controlling the flow of air from said filter to said collection chamber, and a plurality of suction pipes (4).