yes, i know sooty black plugs are a sign of running rich. But the bike hasn't been rejetted for many months and has run great and still does. But the plugs are totally black with soot. The uni filter is clean and i can find nothing blocking the intake to the carb mouths. I would think if it were fuel something would have to be blocking air flow BEFORE the carbs since it's showing on both plugs. However, dowop at BA told me when he recently had stuttering problems at a certain RPM and sooty black plugs, replacing the coils cured it. My problem tho is a cyclic vibration at 15-25 MPH in 2nd gear. But i'm beginning to think it's related to whatever is causing the plugs to be sooty. And since it's unlikely to be a fuel/carb problem since both sides are like this, dowop's reply to me at BA makes me wonder. Can coils cause my pronblem with the vibes, and can they both go bad at the same time or would that only happen by coincidence? I will check resistances tomorrow, but from what i know thats not a sure test since they may change under load. Any thoughts?