As far as valve covers go, DOHC was SOOO much better than SOHC. I have a 1981 750K, and you can remove the valve cover with the motor on the bike. Good luck, SOHC guys!
Remove the valve cover, then do a valve adjustment. It uses shims, and you'll need the shim tool to get 'em out. I would do it anyways, as you don't want to mess a valve up. After you do that, put some Hondabond or similar product into the grove on the valve cover, put a new valve cover gasket in (they're decently priced, DON'T make your own) and tighten everything down.
Amateur-lesson tip: remove your spark plug wires from the coils. These will allow you a little more clearance between the motor and bar. You will be amazed at the room if you do this. I know I was.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.