can you analyse this in terms of rev range and throttle setting?
Vibration comes from the engine. What you do with the right hand and the left foot determines what the engine will do. Try changing the gear you run in. Mine gets much smoother above 4000 rpm and has a real rough resonance at 3000 rpm, but it will pull like a train from ANY rev above 500 rpm!
Different exhausts will change resonances.
You can change the damping or weighting of the bars to limit the vibration at the hand. You can try fat grips.
If it bugs you, buy a Valkyrie. If you want the "Grin Factor", Keep the Rocket as your number one...