These are the two I have now...The blue 450 is licensed & registered; the 500Four is going back together slowly...It's a long term project, I bought one like this brand new in 1972 and have had "unfinished business" with 500Fours since then...
Neither would do the ton, even when new...95 tops...It was thought back then that Honda had deliberately de-tuned them, so as not to embarass the CB750, which would only do 112...