On recent rides, I had some other riders (who are not BMW experts) come up to me and say that the valves on my GS need adjusting. They would point to the sound from the engine and advise me to have the valves checked. I had the valves checked at 12K miles and was told that they were within spec. But now my bike is at almost 20K. I've uploaded a small video to YouTube that I recorded of my engine running. Can I please get the advice of other BMW GS riders? Here's the link to the video: . I appreciate any advice you can offer. Ride safe and ride often!