Could be they vibrate like a tuning fork.
First thing I noticed was the high frequency vibes. Different than my other 800cc vertical twin (TDM850).
I put some bar cozies on it. Buy some cushioned grips, look for some padded gloves. Don't grip it so tight. Don't ride it so fast or if you have too, put the 658 sprocket on it. Maybe these will fit.http://www.vibranator.com/