just to add my experience to this thread, mine vibrated badly, around 4-5k rpm its bad through the bars, sends hands to sleep, and in general when making the motor work it vibes harshly through the footrests, slackening the chain reduced the footrest vibes a bit and smoothed things out (as did changing to a different brand of oil, less clutch rattle too)
i fitted 30mm bar risers and this helped the bar vibrations, took the handguards off and put some heavy rubber insert steel type Versys 650 bar ends on, and vibes nearly all gone now, these are quite heavy at around 8oz each, i also tried silicone in the bars which made no difference at all.....
annoyingly, the top gear whine drove me nuts between 60-70, then just as that starts to quieten down at over 70, the vibes started in the bars.....!!!
tourer....Yamaha are having a laugh,....only 2k mls so far, i'm hoping it smooths out a bit...