I just got my 76 CB550F last month. It was in pretty good shape when I got it, but I've had to tune it all up and replace some parts, notably rebuilding the carbs. Its now in good enough shape that I'll be riding it back up to Maine(where I call home) this week.
I just wanted to thank all you guys for the advice you didn't know you gave me. I wouldn't have this thing running well (or maybe at all) without it. (And I'm sure I'll need more help someday!)