BR500

Venturi tube: The carburettor venturi tube is a narrow point in the vertical carburettor pipe. It serves to speed up the flow of the fuel and oxygen mixture. As it passes through the constriction, the mixture is forced to move faster.

Float chamber: A float chamber functions to automate and regulate the supply of fluid in an engine. Thus a carburettor float chamber measures and regulates the amount of fuel going to the engine’s cylinders.

Jets: Carburettor jets are small brass fittings positioned between the float chamber and the venturi tube. They control the amount of fuel flowing into the carburettor housing as it’s sucked through the venturi tube into the jets.

Throttle valve: The carburettor throttle valve is also called a piston valve. It’s one of the most important carburettor components, as it regulates the air flowing into it.

Choke: The carburettor choke is also a butterfly valve. Its role is to reduce the amount of air going into the carburettor so that the fuel-air ratio is richer in fuel. This allows a cold engine to be started more easily.

Idle system: The carburettor idle system is responsible for monitoring the fuel supply when the engine is idling. This is necessary because when the engine is running at low rpm, the throttle is almost closed.

Linkages and springs: Carburettor linkages are essentially the mechanical arms of the system that open and close valves, for instance.

Gaskets and seals: There are various types of carburettor seals, all with the same function. For example, dirt plug seals stop any undesired material from entering the carburettor.

Fuel inlet and fuel filter: The carburettor fuel inlet is the entrance to the carburettor to which the fuel inlet lines attach, thus feeding fuel to the carburettor.

Mounting and air cleaner: The carburettor is mounted on top of the engine. In a typical configuration, it sits on the cylinder head, between the intake manifold and the air cleaner.