Well it'd be pretty good I'd reckon, I remember seeing one in an old magazine article once, with a Honda CB750 engine shoe-horned in.
Having said that, a stock CB750 frame can be made very rigid indeed, the "Post Classic" racers here just brace 'em up, and they handle fine at speeds way higher than the CR750 race bikes were capable of, Rex Wolfendon's CB750 based 1100cc race engines are capable of 140+ BHP and his modified OEM frames seem to be able to handle that sort of power with no problems, I've seen many riders on Rex's bikes stomping the opposition at frightening speed, with not a wobble.
I'm (slowly) building my racer project with a well braced OEM K2 frame and an alloy early Katana swingarm. The 'arm is about 3 inches longer than the OEM Honda item so it should add stability in a straight line, but may "slow" the steering somewhat. I'm hoping that changing the front wheel to an 18" item, might counter this slightly. All good fun, for sure. Here's a pic of Rex's road bike. Cheers, Terry.
