Hi, I have just had my motor entirley rebuild by a very reputable mechanic. When i bought the bike it was puking oil out of the vent hose horribly, it had something clogging the oil sump screen. I spent 1600 bucks all in all. Brand new cylinder head, all new valves, crank bearings and all new gaskets. Also whoever had it before me used epoxy/ bondo to fill up a hole in the carburetor, so i got a new carburetor to. I know the engine is alright now. Heres the deal: I can ride the bike for 3 hours on the track. then when i roll into the pit and shut the bike off, i can look down under the bike and it just drips a tiny bit, just tiny little drops of oil out of the crank case vent hose, it doesnt puke it out. and I think it only does it when i stop the bike, What could be causing this?