What causes a bike to lose spark?
Faulty ignition switch. Broken down ignition coil. Blown CDI unit. If conventional ignition, closed up points or blown condenser.
What to do if your bike has no spark?
Disable the fuel system. It’s a good idea to close the fuel tank petcock valve as a safety precaution if your bike has one or to remove the fuel pump fuse before checking the spark. Remove the ignition coil lead boot from the spark plug.
Why does my motorcycle engine not start up?
A loose or broken vacuum line might cause too much air to be drawn into the bike’s combustion chamber. This will, inadvertently, alter the mixture of air and fuel. As a result, your engine won’t be able to ignite the mixture well.
How to diagnose why a dirt bike won’t start?
As with a carbureted bike ensure the motorcycle is clean before beginning service. Once the motorcycle is clean, we can begin diagnosis of the motorcycle’s EFI system while keeping in mind that the 2 prerequisites for any fuel injected system to perform properly are are fuel pressure and injector signal.
Why is my bike cranking but not starting?
When the motor cranks 180 degrees, the pickup coil signal turns the voltage back on, so you might have to crank the motor briefly to measure this voltage. If no voltage, you probably have a pickup coil or TCI problem. See the Battery and Electrical Tech Tips.
Why does my motorcycle not start when I turn it on?
Clogged Injector Symptoms of a clogged injector: Your motorcycle will attempt to turn over normally when you try to start it but there won’t be any combustion. If you know it’s sparking correctly and that there is gas in the tank but it has been sitting for a while, your culprit is probably a clogged fuel injector.
How can I tell if my spark plugs are working on my bike?
Holding the spark plugs up to any piece of metal (such as the head bolt), turn over your engine. If you do it correctly, you’ll see a spark from the electrode going towards the metal part. If the spark is weak or non-existent, check the battery of your bike or change your plugs. Then, see if you get better results.
What to do when your bike won’t start?
A minuscule screen helps keep gunk out of the petcock, but corrosion and bits of stray material can cause flow issues. Rattling the petcock a bit can help dislodge any blockages, but replacement or a deep cleaning might be necessary to get your bike running again.
How to know if your engine has no spark?
First Confirm Your Engine Has No Spark. 1 Disable the fuel system by removing the fuel pump fuse or relay. 2 Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine. 3 Finally, Have someone crank the engine and watch for spark.