At a cross country race yesterday, in which I crashed my brains out, I was able to get a stick to punch through one of the rubber gaskets on the head. Of course I didnt notice it until the race was over, when I then noticed oil all over my leg. The bike seemed to run fine, although no oil registered on the dip stick. Now I need to tear into it and see how much, if any damage was done. Any one else had this happen?