In my younger stupider days I had my bike up to just shy of 120. Not hard to do at all on that bike. Kind of scary for my passenger.
What I wouldn't give to be young and dumb again! Had the wife on the back of the rice burner (Kawasaki Ninja 1100 w/Nitrous, racing gears, racing exhaust, etc..) and pulled a wheelie at 70.
Soon as I stopped she hopped off the bike and slapped the living daylights out of me (you know how women just flail at you? That's what she did ...)
She's never gotten on a bike with me since. That was around 1992 ... think I was still living in my first house then.
A couple of years back I was taking Reg Pridmore's CLASS riding school at Heartland Park in Topeka. We were supposed to tape over our speedometers, but they didn't check that TOO closely. On the main straight, I would get up to about 120 and that was plenty fast for me, since at the end of the straight, there was a 90 degree right then an immediate left.
The Pridmores had a charity thing going with the pediatric brain tumor foundation where for a donation, you get on the back of a track-prepped Honda 750 driven by Reg Pridmore (former AMA superbike champion) or his son, Jason Pridmore (he won the AMA Supersport championship that year, and went on to be a world endurance champion).
So, there I am, minding my own business going as fast as I could on the straight, when Jason with a passenger goes by me like I'm standing still. When I asked later, I was told they got up to about 155mph!
Once you hit about 100mph, the wind buffeting actually gets painful, and I'm too old for that stuff any more.
Mark