Posted by seestheday on Jun 12, 2013; 12:29pm URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Valve-adjustment-check-dohc-tp4042213p4042220.html
You have to remove the valve cover, but the gasket is reusable unless it's in bad shape. I have heard of people still running the original one 30 years later.
Download the FSM from the front page of the site. You should really get familiar with it. At the very least the inspection/adjustment chapter and the addendum to that section for your year.
That said, here is a step by step video I made on how to do it.