Oil leaks caused by crank case ventillation. Need to know how oil / ventilation lines should be routed????

Ok, you have two ventilation hoses on the bike. First, the oil line from the tank goes to the inlet side of the oil pump facing the rear of the bike. The return line comes off the front side of the pump and goes to the oil filter. From there, the return line goes to the return fitting on the oil tank.

Now, there is one crankcase vent hose that comes out of the cam chest behind the front chain sprocket cover and runs to the backside of the oil tank. Then there is another one that comes from the top front of the cam chest and goes to the backside of the breather.

Now, the older Sportsters were notorious for shearing the scavenge gear drive pin. When this happened, the pump would pump all the oil into the engine but the it couldn't pump it back out. The engine would be full of oil, literally. Oil will come out of every seam on the engine. Look in the oil tank and see if it's dry. If so, the oil is all in the engine.

If this turns out to be the case, I can tell you how to replace the drive pin but it's not a job for the faint of heart as I recommend pulling the engine out of the frame. It can be done with the engine in the frame but in my opinion, it's a lot harder.

Good luck.
Steve