That's why CMW sells a "T" that says, "LOUD Valves, Save Lives"!
I found that the best way to adjust these valves is the "Twirl" method.
Put the piston on T.D.C., take the adjuster cover off, see if there is any up and down play in the push rod, adjust til it's just about nil, push rod should spin free-
The manual tells you to do it cold, although I do mine warm, after everything is expanded, or if I do it cccooollllddd I leave a bit more play.
Joe
I ride, therefore I am!