* Difficulty starting the motorcycle: A bad coil can cause the motorcycle to hesitate or stall when starting, or it may not start at all.
* Misfiring: A bad coil can cause the motorcycle to misfire, which can cause the engine to run rough or vibrate excessively.
* Loss of power: A bad coil can cause the motorcycle to lose power, making it difficult to accelerate or climb hills.
* Backfiring: A bad coil can cause the motorcycle to backfire, which is a loud popping sound that occurs when unburned fuel ignites in the exhaust system.
If you experience any of these symptoms, it's important to have your motorcycle diagnosed by a qualified mechanic to determine if the coil is bad. A bad coil can damage other components of the motorcycle's ignition system, so it's important to have it replaced as soon as possible if it's found to be faulty.