Why does the motorcycle lack power when starting?

[LeMargaret]

Motorcycle lack of power is usually caused by prolonged high-temperature operation, such as extended use of low gears; damage to the cylinder head gasket leading to air leakage and insufficient cylinder pressure; poor-quality gasoline with excessive impurities; or the throttle lever not returning to its closed position after being opened. Below are specific explanations for why a motorcycle may lack power when starting: 1. Check the air filter: Inspect whether the air filter is clean, focusing on the filter element (usually a piece of sponge). If it's covered in dust, wash it with soapy water, let it dry, and reinstall it. 2. Check the cylinder: Verify if the cylinder pressure is normal. You can unscrew the spark plug and press your thumb firmly over the spark plug hole. Then, step on the kick starter. If you can't hold the pressure no matter how hard you press, it's normal. If no air escapes when pressed, it indicates leakage in the cylinder or combustion chamber. You can also check if the cylinder head and cylinder are tightly sealed, if the gasket is damaged, or if the cylinder is worn, creating a gap between the piston and cylinder wall.