I have an '07 1300C with 15000 miles on it, all of them mine. I've done most of the work on it myself (all oil changes, tire removals, mods work), but never felt comfortable checking the valves, much less doing adjustments if I found they needed it. I know you can't listen to them to gauge their health, but my bike has always run fine and makes plenty of "clackety clack" (yes, that's a scientific term) noises like I've read that it should. My questions: Have I done any harm to my bike by not checking myself or having someone else check them? Should I make this the next thing I do to it without hesitation? Don't beat me up too bad...I guess I just have valve-intimidation-itis.