What's the matter with the motorcycle automatic refueling door?

The reason of motorcycle automatic refueling door is generally that the throttle or throttle line and throttle handle are stuck, resulting in no gas return. Others, such as slight air leakage, improper carburetor mixing ratio, and air door problems, will also cause the motorcycle to automatically fill the valve. How to use the motorcycle throttle: 1, initial stage: At this time, unless you want to tilt your head or turn off the engine, you can't fill the throttle in a hurry. It is best to control the throttle range with the clutch and start slowly. 2. Deceleration stage: Sometimes you don't have to brake to complete deceleration. It's not the foreseeable situation of sudden braking. It is necessary to reduce the throttle to complete a certain degree of deceleration and sudden braking or cooperate with front and rear braking. 3. Corner stage: At this time, because of the difficult operation, the throttle control should be quite skilled. Too large or too small throttle will lead to bending failure, too slow will lead to insufficient centrifugal force, and too large inclination angle will lead to poor angle grasp and lost opportunity. 4. Shift stages: Each shift stage has a relative speed range. Different gears need different torque and horsepower to control how many gears can shift smoothly. How many gears will cause the shift to stall? How many speed ranges will cause setbacks? How many speed segments will lead to fuel cut-off and so on are closely related to the throttle.