I never got to completing it, but I got a 900c engine to upgrade some parts on my 750. The case was apart and stripped.
I was messing around one day mocking stuff up and found that the 900 will bolt in to the 750 mounts fine, the bushings seemed interchangeable. Also when it comes to the final drive, it seems all you have to do is take it off and bolt on a sprocket.
The boys in Honda weren't dumb bunnies, what's the point in making all these seperate non comparable parts when you can make it all the same bolt together?
I'm on the hunt for a resonnable 1100 c...