Exceptional bikes craz1, what's the info on your 550?
I found the 74 CB550 riding through South Dakota. I also picked up a XJ550 Yamaha form one of his friends and restored that also. Pretty much did my normal thing. Disassembled completely. Paint, new pipes, almost new everything. Engine wise , new primary, cam chain, tensioner, reground cams hardened rockers, upgraded to 78 rocker cover with pinned shafts, pistons, rings, vapor blast, rebuilt carbs. It's actually one of the smoothest bikes I have, but just don't ride it enough and need to thin the heard.