The culprit could be things like the timing chain is one tooth forward or backwards of where it should be, or an exhaust valve is sticking open for a little bit too long (which is a pretty common problem with older motorcycles). So if you have a timing issue with an electronically controlled motorcycle then it’s most likely a mechanical timing issue. When the ignition coil receives this voltage signal, it dumps its built up voltage which is carried through your spark plug wire, through your spark plug, and finally ends up as a big spark right at the top of your cylinder.Įlectronic ignition modules generally do a great job at sending the firing signal, even when they’re 40 years old. The way electronic timing works is by sending a voltage signal to your ignition coil when one of the cylinders is in its compression stroke and about ready to fire. Most motorcycles from 1970 on have electronic timing which makes things a lot easier.Įlectronic timing has simplified how to troubleshoot a backfiring problem because there are less parts to check off as the culprit. Motorcycles have two different types of timing, either electronic timing or a points/condenser setup. Click here to see my list of recommended tools to use on your motorcycle. When it comes to troubleshooting motorcycle issues, it’s always nice to have the right, basic tools handy so you can make these fixes in the comfort of your own garage. I’ll describe each possible scenario as simply as possible so you can troubleshoot your motorcycle and try to understand why you might be experiencing this problem. I have a minor in automotive engineering and spent time in some of my classes studying and fixing backfires. I have worked on dozens of motorcycles over the years and backfire issues seem to come around every once in a while. Why is my motorcycle backfiring? A motorcycle backfire happens because of the presence of uncombusted fuel in the exhaust pipe. It can hurt your ears if you’re in a confined space, or could start a fire as some backfires even emit flames. ![]() A motorcycle exhaust backfire is an annoying and potentially dangerous problem to have. A backfire is a loud pop or bang sound that comes from your exhaust pipes when your motorcycle is running.
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