If your motorcycle has a fouled spark plug, there could be a number of symptoms that you will notice. The main indication that you are having spark plug problems is that your motorcycle will not start. Other signs include:
- Poor gas mileage
- Rough-sounding engine when idling
- Shut-off when idling
- Difficulty accelerating
If you notice any of these systems when you operate your motorcycle, you should check the spark plug. If the plug is fouled, take steps to replace it as soon as possible.