I did 160 Km/h (100 MPH) on my GS400 a few times and thought that was pretty fast (especially with a passenger on the back).
And I remember Mr.H having a speed wobble at about 135Km/h once
(I replaced the front tire shortly after and it didn't happen again even at higher speeds).
These days I live where all the roads have 80 Km/h speed limits and I usually try to keep it below 100 except for the occasional "test". Someone once said that guys with sidecars don't go as fast because they are already where they want to be.
Someone else once asked why so many people on bikes ride like they are in a hurry to get it over with....
And someone really wise observed that it is a lot more fun to ride a slow bike fast than it is to ride a fast bike slow