Why can't motorcycle carburetor start?

Common causes of start-up difficulty caused by carburetor;

The metering hole inside the carburetor is blocked, and the problem will be solved if the metering hole is cleaned and unblocked in time.

The fuel filter outside the carburetor is blocked, resulting in insufficient or excessive fuel supply to the carburetor. The problem of replacing the fuel filter in time is solved.

The internal oil level of carburetor is too low, which leads to the mixture ratio of carburetor being too thin to form enough combustible mixture. At this time, you can adjust the float position of carburetor and change the oil level height, and the problem will be solved.

If it is a carburetor with a negative pressure tube, when the negative pressure tube falls off and cracks to form a serious air leakage problem, it will also lead to the problem of difficult start-up

Finally, less common is that the main metering hole screw of carburetor falls off, and the symptom is also difficult to start. At this point, the problem can be solved by reinstalling the metering hole screw.