As with most things, yep, I have a little experience on Tiger Cub ;D
I quite liked it as it was a 'stretched' 150 so all the parts are tiny compared to even a C15
I very much doubt the motor would be bigger than 2mm over piston but the head would be welded and re-shaped
With some 'VERY SMART PEOPLE' getting involved it probably made max power around 9,500rpm although I very much doubt it made over 20bhp and probably less?
A lot of aerodynamics was still classified but 'junk' aircraft parts were around to look at and speculate with
Even so, sub 400mph air flow information couldn't have been super easy to find, particularly if your not even sure what your looking for
It's just impressive what can be done without massive budgets, low power, I guess it's another reason I 'play' with the 'ugly duckling' bikes and try to do more with less (I was 8yrs old in 1965 and 'devoured' everything I could find even remotely related to motorcycles and going fast )
Other kids, if they had any interest in bikes, were more concerned on the numbers on speedo or how much chrome/shiny things were
I probably shouldn't type and take Percocette