Where is the damage when a motorcycle experiences high-voltage misfiring?
2 Answers
Motorcycle high-voltage misfiring can be caused by damage to one of the following parts: Electrical component failure: Faulty ignition coil, spark plug, or high-voltage coil itself. Carbon buildup on spark plug electrodes: Carbon deposits on the spark plug electrodes can be resolved by cleaning the carbon buildup. Loose ignition system connectors: Issues such as water ingress (moisture in the ignition coil connectors) can be fixed by tightening the connectors and removing any accumulated water. Internal issues with the high-voltage coil: Sometimes, the engine may start, but acceleration fails when the throttle is increased, or the motorcycle loses power or stalls when shifting gears and increasing throttle. For such cases, replacing the high-voltage coil with a good one from another motorcycle can resolve the issue.
When I used to ride motorcycles, I encountered high-voltage misfires. After some research, I learned the issue might stem from severe spark plug carbon buildup or outright burning out, leading to poor ignition. Another possibility is aging or leaking high-voltage coils—when a coil fails, the current can't keep up, and the spark plug won't fire. Loose or damaged wire connections can also cause power interruptions; I read online that cracked high-voltage wires are a common culprit, especially problematic in rainy weather. If the CDI unit gets damp or damaged, the ignition signal gets disrupted, affecting the whole system. Before tinkering, it's best to unplug and inspect the spark plug's condition—testing the voltage with tools is ideal to avoid misdiagnosis. Safety first! If you spot an issue, stop and fix it. In my case, swapping in a spare spark plug did the trick, saving me a lot of money.
