As it's such lovely biking weather
here's the 1989 Snetterton 'Race of Aces,' with the cream of the UK riders at the time on the best 750 superbikes: GSXR750s, FZR750s and Honda RC30s.
Oh, and the two JPS Norton rotaries, which were built in a shed. Of course, they're only 588cc (depending how you measure capacity, of course
).
https://www.youtube.com/watch?v=Y7ZE7Yd-U9w