Based on what I have read here for some time, and how the bike was running.......
I checked my 570 valves at 3 hours, then at 43 hours. At 43 hours they are at the maximum lash, .006" intake, and .007" exhaust. At 3 hours they were .005" intake, and .006" exhaust. And, that seems to be the trend with the W head.
I will probably check them in another 20 hours or so to monitor progress a bit more closely.
I would go ahead and have them checked now since it appears that you did not have them checked at 3.