Ok, so I decided this weekend to sell the bars since I couldn't get rid of the vibrations. I even had a seller lined up (sorry again if you read this) but my wife insisted I give them another try.
I reinstalled them yesterday morning and ended up wrapping the frame (under the plastic sleeve) with a cut old bicycle inner tube. I then snugged the ubolts down just enough so they wouldn't rattle. After that, on the advice of the guy at TT I looked into the CA emissions canister as a possible source of problems. Sure enough I realized that the bars fit with the canister still on, but they cause the canister to be pushed back in the mount and sit awkwardly resting partly on it's mount box and partly on the ubolt mount point. I ended up squeezing pieces of the innertube in between the points where they contact to see if that would help.
Sure enough, when I took it for a spin yesterday, it felt great! I can still tell just a tad bit extra vibration around 4k to 4.5k rpm but only a tad now, as in, I can just barely tell when I feel for it. I've put 3 hours of riding time on it at all speeds and riding types (freeway, twisties, backroads, fast/slow) and I can't really notice a difference anymore. So I decided to keep them.
BTW, V-Zee & djg: I'm new to all this. I'm still just learning the common sense rules of mechanics. The instructions with the bars list two recommended torque values, one for M10 and another for M8. After looking over the parts list & descriptions I saw that the engine mount bolts were listed at M10 and the ubolt nuts were listed as M8. That's what I was going off of.
With that said, what you guys say really does make a lot more sense to me...so consider me educated!