What's the difference between motorcycle vacuum carburetor and plunger carburetor? How to adjust the idle speed and mixing ratio screw of vacuum carburetor?

The throttle plunger of vacuum diaphragm carburetor is lifted by air pressure, and the plunger carburetor is lifted directly by throttle line, so there is no obvious difference in actual use. The idle speed of vacuum membrane carburetor is also adjusted by idling belt screws, clockwise and counterclockwise, just like plunger carburetor. Its mixing ratio is adjusted to be thinner clockwise and thicker counterclockwise, but the number of revolutions adjusted depends on the specific model. Not all cars are the same. Even the same carburetor may be different in every car, so it should be adjusted according to the actual car condition.