What are the reasons why the motorcycle still won't start after replacing the spark plug?

1 Answers
McVivian
07/30/25 2:45am
Reasons why the motorcycle won't start after replacing the spark plug: 1. Quality issues with the spark plug itself. 2. Ignition coil failure. 3. High voltage coil failure. 4. Magnetic coil failure. 5. Ignition switch lock failure. 6. Short circuit or open circuit in the wiring harness. Motorcycle spark plug replacement steps: First locate the cylinder head position, find the spark plug cap cover, and remove the spark plug cap cover. Before removal, you can use a spray gun to clean the surrounding area to avoid debris falling into the combustion chamber through the installation hole when removing the spark plug. Use the onboard/special tool to unscrew the spark plug counterclockwise. If there is no dedicated removal tool, you can also use a wrench to turn it counterclockwise. Remove the spark plug body by hand and begin inspection and cleaning. Since the onboard tools lack magnetic attraction and a fixed base, the spark plug may drop during removal. After removing the spark plug body, replace it with a new spark plug following the original steps.
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