My 2014 has 84,200 miles on it as of today. I just had my third valve check completed. I don't do it myself; it's the one maintenance task that I've farmed out to a shop in the seven years I've owned the bike.
The first valve check was back in Feb 2017 at 31,608 miles. I was told everything was in spec, but I didn’t ask them back then what the clearances actually were.
The next was in March 2019 at 55,257 miles. This time I asked them to write down the clearances. Everything was in spec, and the clearances were:
Left Exhaust: .009 .009 Left Intake: .004 .005
Right Exhaust: .009 .009 Right Intake .005 .005
The most recent was September 2021 at 84,146 miles. All of the valve clearances were unchanged from the previous check.
I average about 12,000 miles a year, so I do ride a fair amount. I don't use any super special oil; over the years it's been a mix of Yamalube, Rotella T4, O'Reilly Auto's house brand, and Castrol Go 4T. I'm pretty consistent at using 93 octane fuel, but rarely do I get ethanol free. I've used Lucas Oil and Seafoam a total of one time each over the life of the bike.
The clearance check ran me $392.00, but that also included the installation of a new cam chain tensioner. There wasn't anything wrong with my old one, but I decided to have it replaced based on its mileage. it was replaced with the newest OEM version, with the part number 2BS-12210-01.