Took mine ('13) to the dealers to have the valves checked as I do not have the skills/confidence to do them myself. It has 26K miles on it. I already had the updated factory CCT and they are going to put it in for me at the same time. Not going to be cheap, but I plan to do some more cross country work on it next year and this will get rid of any worries I have on the only real weak point of the engine. They are also going to try and get Yamaha to buy off on replacing the turn signal switch as when pushing the switch in to cancel a left turn, it does not "click". Works, but got to try.
If they do not find the valves out, then I will not worry or check them for a very long time. And this bike looks like it is going to break my history of changing bikes every two years. Or I should say, that new '16 FJR is looking mighty nice and just may be a nice addition sometime next year.
Mark