Most of the guys who ride modern bikes on public roads would probably neck themselves, if they got aboard a Manx on a race track. 50 BHP is plenty. A 1959 Bonneville is quick enough for most riders. One of my mates rode a 1000cc Vincent around Europe. He ended up in Nobles Hospital on Mad Sunday. When he came back to Australia, he raced cars. The first time he tried tp race motorcycles, I took him home to his wife with a broken collar bone. - Manx Nortons have drum brakes, and he had over-reacted anyway, Then another two of his silly car-racing mates tried the same thing and also crashed and never tried again.
The only time motorcycle road racing is really dangerous, is when you first attempt to do it. - It looks easy.
Nuvolari, Rosemeyer, Brabham, Surtees and Hailwood - all began their racing careers by racing motorcycles - going the orther way from cars to bikes, is much more difficult. - 'Monkey see, monkey do' ?