To check for spark on a motorcycle, you can follow these general steps:
Ensure safety: Before conducting any tests, ensure that the motorcycle is in a safe location with the engine turned off. Make sure you're wearing appropriate safety gear, including gloves and safety glasses.
Locate the spark plug(s): The spark plug(s) are usually found on the cylinder head of the engine. The exact number and location of spark plugs depend on the motorcycle's make and model. Refer to the owner's manual if you're unsure about the spark plug location.
Remove the spark plug wire: Gently pull the spark plug wire off the spark plug. The spark plug wire is the thick insulated cable connected to the top of the spark plug.
Prepare for testing: To test for spark, you can use a spark plug tester or an alternative method. If using a spark plug tester, insert it into the spark plug wire boot (the end that connects to the spark plug) and ground the tester by attaching it to the engine's metal surface.
Observe the spark: With the spark plug wire connected to the tester or alternative method, have someone help you by turning the motorcycle's ignition switch to the "ON" position (without starting the engine). Alternatively, you can use a remote starter button or other methods to engage the starter motor.
Look for a spark: While observing the spark plug tester or alternative method, have your helper engage the starter or ignition switch. Look for a visible spark at the end of the spark plug tester or between the electrodes of the spark plug if you're using an alternative method.
Assess the spark: The spark should be strong and blue in color. If you don't see a spark or the spark is weak, it could indicate an ignition system issue.
Repeat the process: Repeat the process for each spark plug in the motorcycle if there are multiple cylinders.
If you don't observe a spark or have concerns about the quality of the spark, it is recommended to consult a qualified motorcycle mechanic. They can diagnose the ignition system and address any issues that may be causing a lack of spark.