I feel a little guilty about this but I have never checked my valves.
You shouldn't feel guilty,your bike starts and runs great.
Once the shimming starts the coating is worn off and things go downhill in a hurry right ? My X at 70 hours never needed any shimming,and the R is still young. What I will do is once that starts I 'll shim them once then get the new head and valves coming.Once shimming starts valves getting thin around the edges is next ,so why would I want to run an engine like that?
Like I said, I don't get all the theorizing,hand wringing and intellectualizing, all the bs really. What's the big deal ?We wanted fast and light thumpers,with 10K rpm,50hp, so 450 bucks every few years is some kind of crisis ? Most of us have more add-ons and bling than that ! (Do I ever

These are great bikes,we all were blessed with the means to buy any dirt bike wanted to buy,and we all picked Honda CRF's. The real measure of satisfaction is that most of us wouldn't even consider buying anything else if we had to go buy a new one tomorrow. Doug