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How do you read this spark plug?
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27-07-13, 22:02
Black Dog
Expert XT-Moto
Join Date: Jan 2007
Location: West Wales, UK
Posts: 199
The side electrode is a perfect biscuit brown, so I'd call that pretty good. The plug itself is a little bit sooty, which suggests the mixture is slightly rich, but if you are riding it hard that's not a bad thing. I'd say nothing to worry about.
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