Hey Everyone, thanks for your notes!
I had an 81 CB900C given to me after sitting 9 years in blackberry bushes. Front end mashed when it hit a horse.
While waiting for parts I found a complete 80, same model, sat 7 years after PO had minor wipeout, swore off riding. I did electrolysis on tank, rebuilt the carbs, fresh gas & battery, maybe a week's work and a month later, Vrooom!
So I got a frontend complete, new steering head bearings and fixed the 81 (surprising the frame was still straight), did the carbs etc and it runs too. Too easy! But I am methodical, clean up all the electrical, etc.
CB900C was built 80-82, morphed from EU 750 DOHC, using right side GW shaft drive of those years, so to move from chain drive on left they put in a jackshaft and some genius put a gear on it. So they have a 5 speed main 2 speed auxiliary. Air over hydraulic suspension, very nice ride. Due to length of trans, the wheelbase is one of the longest of that era, yet the things turn smoother, more steady and tighter than my Sportster.
So I'll finish them up in the spring, sell one, then hit a pair of 550s. I hope to build a nice collection over time. I have also done a major wooden boat restoration - wish I could put FB or photobucket links here.