If the key is not working to open the fuel tank lock of your KTM RC 200, there are a few steps you can try:
Verify the key: Make sure you are using the correct key for the fuel tank lock. Sometimes, keys can be easily mistaken, so double-check that you have the right one.
Lubricate the lock: Over time, dirt, debris, or lack of maintenance can cause the lock to become stiff or difficult to turn. Try spraying a small amount of lubricant, such as WD-40, into the lock mechanism. Allow it to penetrate for a few minutes, then try turning the key again.
Jiggle the key: Sometimes, the lock mechanism may be slightly misaligned, preventing the key from turning smoothly. While applying gentle pressure, try wiggling or jiggling the key in the lock to see if it helps to engage the mechanism and unlock the fuel tank.
Seek professional assistance: If the above steps do not work, it is recommended to consult a professional locksmith or authorized KTM service center. They have the expertise and tools to diagnose and resolve issues with the lock without causing damage to the motorcycle.
Remember, attempting to force or break the lock can cause further damage and may void any warranties or insurance coverage you have. It is best to seek professional help if you are unable to unlock the fuel tank with the key.