Carburettor Parts. Power Air Filter 17 / 21mm for 15mm Bing Carburettor for Scooter Moped Motorbike. Power Air Filter 35mm Carburettor Connection Silver. CVT Roller Sets. Racing Planet UK specialise in scooter parts and small capacity motorcycle parts, with everything from electrical parts, braking, cables and mirrors to engine, transmission, exhausts and accessories.