My 2016 AT has just registered 16,000 miles and the valve clearance check and adjust are specified at this point. My experience with shim type engines is that that is a conservative mileage. My Honda VFR 800 would easily go 30,000 Miles between checks. I know the AT has screw and lock nut on the exhaust valves which typically require more frequent adjustments. I went back through all of the pertinent threads in the Engine - Technical section to find what owners have experienced at the first valve adjustment to see if they were loose or tight on in spec. Member Ziggy was the only one to say his were in spec. at the first check. There is a wealth of knowledge out there on this topic. Can you tell me your experience on this? I would like to go 20k -25k miles or??