The vibration just becomes overwhelming at that speed no matter how smooth the bike is to begin with.I used to have a Kaw Z1000,at 135 I couldn't feel my hands on the bars.Comfort becomes nonexistant,there's nothing to brace you against the wind.

I'll settle for my current 'baby',0-100-0 in 12 sec,I've had it to 150 in quick spurts in complete comfort.
Later,Tony