I haven't done it in a while, but I used to get on a certain, deserted road, and wind it out....briefly!
I don't think I ever got much over 140 on the speedo.
The first time I did it, the magnetic tank bag I was using lifted off the tank, and was flapping in the air, only held by the leash around the steering head. That was enough to scare the crap out of me....
It is pretty amazing how fast this turkey will get up in the triple numbers.....