Ok 100 mph overtakes? That wold be a stock engine with you riding up right?
I didn't say it was a stock engine but that is sitting upright, and it does have a single carb. My point was that single carb head 750s don't have to be slow. I know that if I was to fit a twin carb head (if I did it would be a V head, not an E one), it would increase the top end somewhat but for road use, albeit not hanging around, I can't see the need.