What Causes a Motorcycle to Suddenly Stall During Normal Operation?

[Vernon]

Motorcycles may suddenly stall primarily due to four reasons: inadequate fuel supply, excessively high engine temperature, electrical circuit malfunctions, or clutch/component seizure. Below is a detailed explanation of these four causes: 1. Inadequate Fuel Supply: When the fuel tank has fuel but the carburetor lacks it, this indicates a blockage in the fuel line from the tank to the carburetor, necessitating cleaning and unclogging. 2. Excessively High Engine Temperature: Overheating leads to poor lubrication, causing the piston and cylinder to seize, resulting in stalling. 3. Electrical Circuit Malfunctions: Sudden engine power loss is often due to wiring issues. Inspect all connectors and the trigger coil, clean off oil residue, increase the clamping force of connector tabs and sockets, and enhance contact strength to ensure stable connectivity. 4. Clutch or Component Seizure: If the screws on the clutch support disc are not tightened properly and the safety riveting points are inadequately secured, the screws may loosen progressively during engine operation. This can cause the screw heads to press against the transmission countershaft bearing cover, leading to clutch seizure and sudden stoppage.