1. Loosen the bottom screw of the carburetor with a screwdriver, observe whether there is gasoline flowing out, and eliminate the oil circuit problem;
2. Block the installation position of the spark plug with your fingers, start the engine, and observe whether there is gasoline remaining on your fingers to rule out the possibility of oil flooding. When starting a motorcycle engine, not only the starter needs to run, but the ignition system and fuel supply system also need to run, and the operation of these systems is inseparable from electricity.
