Vibration Culprit?

[redrider]

I felt some subtle vibration. Something was different. Just like 1000 times before. Coil wire at coil end, RH side was held in place by the boot as the wire end had acquired its own spark gap. Surely this caused combustion irregularities. Now imagine one O2 sensor for both pots. One side rich, the other spot on. One sensor sees rich and corrects the mixture. Both cylinders are not the same though. Is the good side now overly lean because the bad side is in the mix and the single O2 does not care?

[MotoGoosy]

Hmmm, interesting.  Maybe I have the same issue.  What model?

[redrider]

04 Café Sport. Mine does not use an O2 sensor so no mixture changes by computer. I was  thinking of possibilities with other types. Still, a sketchy connection will affect running regardless.

I can almost balance a nickel on the filler at idle after warm-up.