OK, I'm the guy that my friends roll there eyes at because I am very meticulous about maintanace. The other day I decided to check my valve gap, one intake and one exhaust where slightly out of tolerance,so upon dismantaling to reshim the valves I inspected the cam and much to my surprise a few lobes had light little pits and some lobes had obvious wear marks, however the lobes are still withing tolerance. My bike has never seen black oil. My yz450 2004 has only 50 hours on it. I use Delo400 dino oil. My question is this: Is what I described normal for a cam to look like and if not is my oil letting me down?