Why does the motorcycle suddenly fail to start?

[DiBraxton]

Fuel and electrical circuit issues. Abnormal fuel supply: Check if there is fuel in the carburetor. If there is no fuel, it indicates a blockage in the fuel line from the fuel tank to the carburetor, which should be cleaned and unclogged. If there is fuel in the carburetor but the engine still fails to start, inspect whether the carburetor fuel filter is clogged or if the main jet is dirty. Even if the engine starts, the issue should not be ignored, as it suggests an undetected fault somewhere in the fuel system. The fuel supply system pipelines must be thoroughly unclogged. Otherwise, the issue of the engine stalling automatically may recur. Electrical circuit fault: The cause of sudden engine power loss is generally related to wiring issues. Check all connectors and the trigger coil, clean off any oil stains, increase the clamping force of the connector tabs and sockets, and enhance contact strength to ensure stable contact.