Why did the motorcycle suddenly put out the fire when it was idling?

When the motorcycle engine is idling, because the carburetor used is a plunger throttle carburetor, it is easy to stall after slamming on the throttle.

Because the plunger carburetor relies on the throttle pipe to control the air intake, suddenly increasing the throttle at idle speed will cause the air intake to be too large, so that the gasoline in the float chamber will be ejected from the nozzle and form a certain proportion of combustible mixture with air, which will lead to the mixture being too thin to be compressed normally, and then the ignition will be turned off.

Rotary valve throttle carburetor and vacuum plunger carburetor can eliminate this phenomenon.