How to adjust a carburetor on a motorcycle?
After a certain run, it is necessary to perform a large amount of work on the engine. The carburetor should be checked if the engine stops working normally. What does it mean? Uneven running, loss of power and increased fuel consumption. Sometimes the engine overheats.
How does the carburetor work?
In simple terms, due to the vacuum in the intake system, fuel is sucked from the carburetor through the emulsion tube and fed into the cylinder or cylinders in the form of a fuel-air mixture. in the vast majority of cases czVacuum carburetors are used for motorcycle parts. What are they characterized by? Additional choke raised by vacuum. There is a needle at the bottom of the throttle body that allows more fuel to be sucked in when it is raised.
When does a carburetor need cleaning?
When deposits prevent fuel from entering the carburetor. They can be placed in different places. Most often we can find a lot of dirt in the float chamber. The idle system can also become dirty. This is manifested by uneven idling or stalling of the motorcycle. If there is a lot of pollution, it will be felt by a decrease in the power developed by the engine. Where does pollution come from? From low-quality fuel and from corrosion, corroding the fuel tank from the inside.
Cleaning and adjustment
For cleaning, disassemble the carburetor down to the last bolt. All items must be protected from loss. For a single-cylinder engine, this is not so difficult. The ladder starts at multi-cylinder units. Cleaning the carburetor usually consists of unscrewing the so-called mixture screw. Its setting is adjustable. We can also adjust the position of the float in the float chamber, which results in a change in the fuel level in the carburetor. If it is too low, it will be difficult for the engine to develop full power at higher RPMs. If the level is too high, the carburetor may flood. In extreme cases, the engine will stall and we will have problems starting it. The position of the float is adjusted by bending the plate, which presses on the needle valve, which shuts off the fuel supply to the carburetor. However, not all carburetor adjustments can be made. If a plastic float is used, we do not affect the fuel level.
The mixture ratio screw is used to control the amount of fuel supplied to the throat. This is a circuit independent of the emulsion tube. It should be remembered that fuel is always supplied by the idle circuit. If the mixture is set too lean, the engine may behave strangely, for example, not running smoothly from speed. The engine will also overheat. If the mixture is too rich, the spark plug will build up carbon deposits and the engine will run rough.
