Funny everyone speaks of their valves staying in spec.
My valves were out of spec at 12K and required adjustment.
I wonder if that has to do with riding style by each owner?
I know I wring the neck of my Scrambler... I'm always chasing a Moto Guzzi down...
At my 12K service the valve adjustment and TB sync (plus a much needed filter cleaning) really improved the running of my bike.
FWIW...