Why Does the Motorcycle Stall When Throttle is Released?
1 Answers
If a scooter stalls when the throttle is released, it may be caused by an overly rich air-fuel mixture. You can check if the air filter is oil-soaked or clogged, whether the carburetor's mixture ratio is too rich, or if the fuel level is too high. Alternatively, immediately giving a slight throttle input after decelerating from high speed can often prevent stalling. The carburetor is a mechanical device that mixes a specific ratio of gasoline and air under the vacuum created by the engine. As a precision mechanical component, it utilizes the kinetic energy of incoming airflow to atomize the fuel. Its critical role in engine operation has earned it the nickname "heart of the engine." A complete carburetor system includes starting, idle, medium-load, full-load, and acceleration circuits. It automatically adjusts mixture concentration and output according to different engine operating conditions, while also ensuring proper fuel atomization for smooth engine operation. Main causes: 1. Unstable idle: Stalling upon throttle release indicates unstable or low idle speed. Low idle is easily adjustable, but unstable idle requires more attention. 2. Prolonged inactivity: Extended periods without use can cause gasoline to form gum deposits on carburetor walls and jets. Drain old fuel and refill with fresh gasoline for testing.
