Broken Spark Plug Ground Electrode
#1
After Riding hard for a couple of hours on my 400 Scrambler, the top end started to run like a dog, like it was running very rich. It was backfiring on a trailing throttle, and when I turned it off, the engine was stalling from a fast run when the throttle was lifted off.
I pulled the plug out and the ground electrode had broken off. It was broken, not burnt. The plug was new with only about 3-4 hours on it. Once the plug was in, it ran exceptionaly well again. I hope the plug ground electrode fell out the exhause port. I will have to take the head off to have a look for any damage.
Has anyone broken the tip of a plug like this? What causes it? I have a Wiseco and Cool head, as well as other mods.
I pulled the plug out and the ground electrode had broken off. It was broken, not burnt. The plug was new with only about 3-4 hours on it. Once the plug was in, it ran exceptionaly well again. I hope the plug ground electrode fell out the exhause port. I will have to take the head off to have a look for any damage.
Has anyone broken the tip of a plug like this? What causes it? I have a Wiseco and Cool head, as well as other mods.
#2
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