There can be various reasons why your KTM Duke 200 suddenly stopped while riding and is not starting. Here are a few possible causes:
Fuel-related issues: Check if you have enough fuel in the tank. It's possible that you ran out of fuel, especially if you haven't been keeping track of your fuel level. Also, ensure that the fuel valve is in the proper position, allowing fuel to flow to the engine.
Electrical issues: A problem with the electrical system can prevent the bike from starting. Check the battery to ensure it has a sufficient charge. Check the connections to make sure they are secure and not corroded. If the battery is weak or damaged, it may need to be replaced.
Ignition system malfunction: The ignition system, including the spark plug, ignition coil, or CDI unit, could be faulty. A faulty spark plug may prevent the engine from starting. Consider checking these components and replacing them if necessary.
Overheating: If your engine has overheated, it may shut down to protect itself. This can occur due to insufficient coolant or a malfunctioning cooling system. Check the coolant level and ensure that the cooling system is functioning properly.
Mechanical issues: There may be mechanical problems such as a blocked fuel line, a clogged air filter, or a problem with the engine itself. It's best to have a professional mechanic inspect the bike to diagnose and address any mechanical issues.
It's important to note that without a physical inspection by a qualified mechanic, it can be challenging to determine the exact cause of the problem. If your bike is not starting, it is recommended to contact a certified KTM service center or a knowledgeable motorcycle mechanic to diagnose and resolve the issue. They will have the expertise and tools necessary to identify the problem and get your bike up and running again.