If everything else checks out, change all the plugs again! Unless you are able to locate a bad one by trial and error. Those Iridiums are sensitive little Fockers! If one was dropped, forget it. I've had trouble with 'em on 2 bikes already...
I had a very similar issue a few days ago after really giving my 750 some juice for a few minutes. Started experiencing hesitation, poor throttle response and power. Limped the bike back home. Took it for a ride the next day and everything seemed to be fine again.
However, no one reported a jumping tacho needle so maybe it's not the same issue. Just worth noting in case someone ends up chasing their tail and doesn't consider the spark plugs.
Last edited by kwaka10r; 03-10-2015 at 07:25 PM.
Reason: forgot thread link