OK you know the rules by now, yes I make them up as I go along.
First prize is a chocolate fish (rare New Zealand delicacy) left over from last quizz when the winner failed to come and get it.
The bike is definately a CB750 I've owned it since I was a wee boy (at least a week then) and always wondered at it's pedigree.
Having the crem de la crem of Honda CB750 owners/rebuilders as fellow forum members I feel confident that someone will know.
Engine and frame number are a bit hard to see (electron microscope required) so you will just have to do it by eyeometry.
Best of luck...........go.