Man, I don't know what the manual says for a valve check/adjustment for my '07WR but this week was the first time it has ever been looked at. The valves were in spec and were going to be re-used. The piston/rings/spark plug needed to be replaced. I decided to have all the valves replaced also just because I wanted to have a complete fresh top end. Also putting an hour meter on it now.Not a full detail. Just a good washing with soap and the power washer. (And of course Pledge)
Where taking it in right now for a valve check/adjustment, oil/filters change, and all the other good stuff the manual recommends after every 15 hours. (Which is overkill IMO). We did the last oil change and filter change ourselves. But since this next service requires a valve check/possible adjustment (which we don't know how to do) were going to take it in and have them do it along with all the other little stuff.