Not necassarily. Just like the lean condition vibration thats been mentioned which happens only at certain points, a resonance may be setup right where it's happening. Instead of a mixture problem tho, this is a spark problem. I'm not saying it's definatly the coils causing the vibe at all, but it's awful suspicious that they seemed to happen about the same time. And considering the bike runs as good as always you'd thing with open secondarys there would have to be some sort of symptom, right? Well, the only symptom in how the bike runs right now is the vibration. Hopefully i'll know next weekend.