Some body must know. I read on a site that you can use 1991 or later nighthawk CB 750 top tripple clamp to fit your bars in as everything just bolts up. Any body know if this is true and if all model CB's work 600,750,900 and how far old you can use that will still work. if at all.

 

The only CB's made past 1991 are 250 and 750 I believe. I used to have a 750 Nighthawk, but never thought about swapping triples. I think I sold the manual I had along with the bike, maybe you could find spacing & OD via google?