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Secondary plugs black


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I just got through changing my plugs and valve cover gaskets. I happened to notice the primary plugs were that normal grayish tan color but the secondary plugs were black and oily...not to bad but a noticeable difference between the others.

Anyone know what could have caused this? I must say, I've been out of town for 2 months and the bike has been sitting,not sure if that would make a difference. Thanks

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Afternoon Jim


Unless you removed those lower plugs RIGHT AFTER a high speed run they will be black looking, & if cold start, just before removal, then probably oily looking. (normal).

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