You guys are just lazy. I think it is important to check the valve adjustment. I did mine at 100 miles, and I do it every other oilchange just because I can. It isn't that hard to do. While I am in there I clean out the air filter, remove the battery and clean out the battery box and clean the connections. Check all the fuel lines and vent lines for leaks cracks etc. I usuallly check the fluids in the front and rear differentials, and the brakes and bearings at the same time. I check the CV boots after every ride, along with the engine oil, and the cables. Maintenance is what gets you there, and back. For what its worth, often I find the valves are a little out of spec, and they are not ticking yet.
Once a year all of the connections get inspected, cleaned and coated with dielectric grease. So far I have never had any sort of problem.