Same here, I'll check it whenever or when I upgrade the cams. Or if something goes bad I'll install some "goodies" at the same time. Win - Win. Definitely not an urgency in my mind.Not checking mine. I'm too lazy and incompetent to do it myself, and I don't trust anyone within riding range of here to do it. If I trash something, no big deal, buy a s/h head or fit something better.