Dellorto Vent Tube for overflow of the carburetor, 180mm in length. This vent tube is crucial for protection of the carburetor during operation so that dust and particulates do not get into the overflow breathers.
Each tube is perforated along its length at the top to allow for venting of overflow fuel in the case of an over-fill of the carburetor or stuck float.
For most racers, they will be familiar with this tube as it sticks 'up and over' the top of the carburetor and has a slight wedge-shaped chunk removed from the vent tube.