The only vibration of any concern would surely have to come from carbs not synced properly. There's probably only been a couple of times on a long trip (I do a few) where I ever thought the vibration had got to a point where it was even noticable. Buying something to lessen this somewhat intermitant phenonomenum would be a waste of money IMHO.

Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.