The famous diaphragm carburetor from Tillotson. This carb comes from karting and is only available with a 24mm venturi. Diaphragm carbs allow for adjusting the engine without having to change jets all the time. While slider carbs are adjusted via jets, diaphragm carbs are directly and continually adjusted via 2 screws. If you want to fit an air filter to the carb you need a bellmouth, which you can order in the Spareparts section. In case your carb should get leaky, we of course also offer gasket kits.In order to fit a diaphragm carb, you will usually need an adaptor for the throttle cable. At the end of the day it's better to pump the carb dry because this type of carburettor has problems when left with a standing mixture. You then also can check with the pressure test pump whether the membranes are still leak-proof. If it doesn't have the required pressure, it has to be revised.