Inspecting and cleaning the airbox

The air box is connected to the carburetor and so engine intake system and has two functions: it filters the outside air that comes into the engine and reduces its noise effect. Hence its “double” name: intake silencer and, more commonly, air filter.
Back in the day, karts didn’t come with air boxes. The component was developed over time, both to cut noise emmissions and to keep dirt and debir to wind up into the engine. Eventually, use of air boxes became so widespread, that the CIK-FIA made homologation mandatory, setting specific parameters on three fronts: noise reduction, filtering capacity, and internal volume (not above 4 liters). Today’s karting marketplace offers a great variety of air boxes, with significant differences also in appearance. However, they all function more or less the same. This article features the BR model (BR30R or BR23R, depending on restrictor size) by Freeline, the Birel ART accessory brand.