What are the reasons for a motorcycle's weak starting power?

[DeKathryn]

Here are the reasons for a motorcycle's weak starting power: 1. High-temperature operation: The motorcycle may have been running at high temperatures for an extended period, meaning prolonged use of low gears; 2. Insufficient cylinder pressure: Damage to the cylinder head gasket causing air leakage, resulting in insufficient pressure inside the cylinder; 3. Poor fuel quality: The gasoline quality is poor, possibly containing too many impurities; 4. Throttle lever in closed state: The throttle lever did not return to its position after being opened, remaining in a closed state. Additional information: 1. Check if the air filter is clean: Mainly inspect whether the filter element (usually a piece of sponge) is clean. If it is covered in dust, it can be washed with soapy water, dried, and reinstalled. If this is the issue, the motorcycle will produce a muffled sound, and thick smoke will come out of the exhaust pipe when accelerating. 2. Check if the cylinder pressure is normal: Inspect whether the cylinder head and cylinder are tightly sealed, whether the gasket is damaged, and whether the cylinder is worn, causing a gap between the piston and the cylinder wall.