What are the reasons for a motorcycle frequently stalling during startup?

[MacAlessandra]

The reasons for a motorcycle frequently stalling during startup are: 1. The fuel pipe is too short or pulled too tight, causing insufficient fuel supply or the use of contaminated fuel; 2. Excessive valve clearance, valve leakage leading to abnormal cylinder pressure, or severe wear of piston rings and cylinder walls resulting in insufficient cylinder pressure; 3. A dirty air filter causing severely inadequate air intake, making it difficult to move or even stalling directly; 4. Poor insulation of the high-voltage coil, severe spark plug erosion, or unstable components like switching transistors in the ignition ECU due to high temperatures causing stalling. Motorcycles are driven by gasoline engines and are two-wheeled or three-wheeled vehicles steered by handlebars to control the front wheel. Motorcycles are categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring bikes, among others.