After going around and around about buying a 4T I found an '06 YZ450F yesterday for $1200 and I jumped on it. It's a bit rough around the edges but nothing that can't be fixed for a few bucks. So far it looks like about $400 should do the trick. I've gone over most of the bike and there is only one concern that I have. I rode it around a little bit and then put it on a stand in the garage and noticed that oil started dripping out of what looks to be a vent hose on the left side of the bike coming off of the valve cover. I really don't know squat about 4T's at this point so I don't really know what to think about that. I'm guessing the hose is more or less a pcv of sorts but why would oil be coming out of it like that? It made a puddle about the size of a baseball on the ground. Any ideas?