I have that type alum. roller rocker on my valve train, not spinning 6500 that often, street driving and all that, 5 years. I have hydraulics with a car saker cam and I will adjust them a few times a year. I like the way the motor seems to have a balance even sound at idle 950 and at curse.. Have this 73 V twin that is a hydraulic motor and it just loves a valve adjustment, make a huge difference in the way runs..
Set and forget if you like just letting you know that I for one believe in adjusting the valves. A very nice thing that make your motor so happy and it rewards you..