For awhile, the valve clearance check was recommended at 10,000 miles, then went to 20,000. When I bought my 2013 RR, the Dealer said for the 10,000 mile service, they only checked valve clearance, "IF" there was some ticking noises. It is quite a bit of what I would call "intricate" work, and I would only trust a very experienced mechanic, familiar with the Rocket, to touch my bike for that job. My 2013 is closing in on 20,000, and is as quiet as when new. And I believe a lot in the old "if it works, don't fix it" theory.