What are the reasons for a motorcycle frequently stalling and feeling like it's not getting fuel?
2 Answers
The following are the reasons for a motorcycle frequently stalling and feeling like it's not getting fuel: 1. Faulty kill switch: Over time, the kill switch may become moldy, leading to poor contact. 2. Faulty voltage regulator: The internal components of the voltage regulator may fail due to excessively low stall protection voltage or excessive charging current. 3. Fuel supply issues: During normal operation, the motorcycle may suddenly lose power, with the speed gradually and evenly decreasing until the engine stalls. Below are the diagnostic principles and methods for motorcycle faults: 1. Basic principles of motorcycle fault diagnosis: First, investigate and familiarize yourself with the issue. When receiving a faulty motorcycle, first ask the owner about the circumstances and symptoms before and after the fault occurred. Based on the information provided by the user, carefully analyze the circuit and understand its principles and the role of its components. 2. Methods for identifying motorcycle faults: First, analyze the fault based on the symptoms to determine possible causes and locations before conducting inspections. This avoids ineffective checks on unrelated parts and prevents missing critical inspections that could delay fault resolution.
My old motorcycle used to stall like this all the time—running fine one moment and then suddenly losing power before stopping completely. I figured it was most likely a fuel system issue. The bottom of the fuel tank tends to accumulate water and impurities, which can clog the fuel line and cut off the gasoline supply. Those tiny fuel passages inside the carburetor also get easily blocked by dirt—I had to clean it several times before it flowed properly. If the spark plug is fouled or has too much carbon buildup, the ignition becomes erratic, causing the bike to jerk while riding. A dirty air filter can also suffocate the engine, messing up the air-fuel mixture and leading to stalling. I remember that time it stalled on a mountain road—almost got into trouble—had to push it to a mechanic for a thorough fuel system cleaning before it was fixed.
