I was given an 84 200X as payment for reviving a poorly stored for 38 years 1971 CB750K
and it was missing a few things as you can see in the image here.
There was no seat, fenders or any mounting hardware, no CDI box, no float bowl gasket, no airbox and only a garbage foam pod filter but, now I have all of that stuff, she runs great and am in the process of making her complete which is how I keep my vintage Hondas.
I take old neglected Hondas from the 60s & 70s (and early 80s now) and make them run as good as the day they left Japan, it is what warms my cold heart.