OK fellas, I have a few posts on here about my wifes 2004 CRF 80. I went ahead and got the cylinder bored out 1mm oversize and picked up a new piston kit. The engine was smoking and I found a bad valve when I tore it down. I de-carbonized the head and have two new valves to lap in and put the engine back together. I found two thin flat washer looking pieces on the ground. Initially I thought it was one, but there are two stuck together and aligned perfectly. They fit down in the cut outs in the head where the valve spring sits. 1.) The odds of them falling out (one from each valve location) and landing/sticking to each together perfectly is slim and none. 2.) I am assuming they are shims to get the spring pressures where they need to be. 3.) I checked the online engine schematics and do not see them anywhere. How do I fingure out where they go? Are they intake or exhaust? Any thoughts?