do you have the FSM? if not see my sig line for a down load
great way to deal with a 40 yr old bike. Nothaven't done much of anything. don't know this adjuster. i suppose the bike will die at some point. i'll probably get in a few repairs along the way. i don't have it to preserve it. i'll use it. hope to get a few years out of it. yes, it's abuse. I also have a wonderful huge old Ariens snowblower from the same period that i barely keep running. i also have bicycles older than the CX500 that i ride hard every day and put away wet and they keep working. i swap out parts as they wear out.