Sudden engine shutdown without warning and the subsequent difficulty in restarting can be caused by various factors. While it's challenging to pinpoint the exact issue without a proper inspection, here are some potential causes to consider:
Fuel Delivery Issues: A problem with fuel delivery can result in engine shutdown and difficulty in restarting. This could be due to a clogged fuel filter, a malfunctioning fuel pump, or a problem with the carburetor or fuel injection system. Insufficient fuel supply or improper fuel mixture can cause the engine to stall. The waiting period you mentioned might allow the fuel system to recover or clear any blockages temporarily.
Ignition System Problems: Issues with the ignition system can cause sudden engine shutdown and difficulty in restarting. Faulty ignition coils, spark plugs, ignition switch, or wiring can disrupt the spark required for combustion. If the ignition system gets overheated during operation, it might need time to cool down before it can function properly again.
Electrical Malfunctions: Electrical faults, such as a loose connection, faulty wiring, or a failing battery, can cause intermittent power loss and engine shutdown. When the electrical system is compromised, it can affect various components, including the ignition system, fuel pump, and engine control unit (ECU). After some time, the electrical system might stabilize, allowing the engine to start again.
Overheating: If the engine is overheating due to a cooling system malfunction, it can trigger an automatic shutdown to prevent damage. Once the engine cools down within the waiting period, it may be able to start normally again. Issues like a malfunctioning thermostat, radiator blockage, or low coolant level could contribute to overheating.
Sensor or ECU Problems: Faulty sensors or a malfunctioning ECU can cause intermittent engine shutdowns. Sensors such as the crankshaft position sensor or engine temperature sensor provide crucial data to the ECU for proper engine operation. If these sensors fail or the ECU receives incorrect information, it may shut down the engine as a safety precaution.
Given the recurring nature of the problem, it's recommended to have your motorcycle inspected by a qualified mechanic. They can perform diagnostics, check for error codes, and conduct a thorough examination of the fuel system, ignition system, electrical connections, and sensors to identify the underlying issue and provide appropriate repairs.