They look fouled to me (MMT Fouled)
MMT is a anti-knock additive used to replace lead.
If it's running fine, just clean them and re gap them.
What kind of gas do you use?
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Joe!
1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing!
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1999 Ninja ZX-6R 10.32@135mph!
1993 Olds Eighty Eight LSS 16.40@88.8mph