I have a 2005 yz250f and it's leaking oil from the header pipe bolts on the block. Can't figure out the problem I've torn the whole bike down motor is in peices and can't find the problem. I've done so much research and no one's had the same problem. I'm at the point of giving up and getting rid of the bike but don't want too can't I have over 2 grand wrapped up in it. Any ideas?