I don't know that it is so wrong. Years ago when the CB750 was new, I rode one. It was a great road bike, no oil leaks or ratlles, but the handling felt stiff and horrible. These days they get raced in historic racing with success in Australia because of the dopey rules which permit excessive over boring. The bikes are essentially 'point and squirt' types with great top end. A few years ago I raced my Seeley 850 against them and got blitzed off the clutch start, and at the ends of the straights, but everywhere else I could easily outride them. A CB750 is a good top end motor, but even as a CR750, they are better on a big circuit. I've noticed in the videos of Doug McCrae and Kenny Cummings that the CR750s sometimes flash by them on the big stuff. A commando frame is not so flash, and fitting a CB750 motor to one seems a combination of two uglies, but the bike might just be nimble, and have good top end. So it would be able to be used as both 'point and squirt', and have nimble handling .
When I first looked at t hat photo I thought is was pretty disgusting, until I actually thought about what it wold be like to race . Fitting different motors into different frames is an unpredictable activity. The worst is when two stroke motors get fitted into frames built for four strokes. Only a moron would build a Kawasaki triple motor into a featherbed frame, when Egli frames are available. ]
