What are the reasons for difficulty in starting a motorcycle?

[IkerRose]

Motorcycle starting difficulties can be attributed to the following reasons: Temperature issues: Gasoline vaporizes in the fuel line due to high temperatures, forming bubbles that block the fuel line. This phenomenon is particularly common when there is insufficient height difference between the fuel tank and the carburetor, or when fuel levels are low. Oil film issues: In older two-stroke engines with significant sludge buildup in the crankcase, oil film evaporation is severe. In four-stroke engines, the area available for oil film evaporation in the intake pipe is limited, making this phenomenon less severe. Carburetor issues: Sometimes, the float can push the inlet valve needle upward, causing it to stick to the fuel inlet. If the inlet valve needle does not come down, fresh fuel supply is cut off.