The oil pump on my '79 shovel is a clusterfuck. There's small oil lines with screws in the ends and wire twisted around them and a piece of 3/8 line that has a bolt in the end of it that leaks oil all the time. Besides having to fix all that shit, one hose is longer than the rest and runs back to just past the kicker and stops. Best we can figure this is the breather line. Problem is that oil spurts out of this line when cranking the bike over. The spurts match the cranking compression strokes, ie.. more spurts on that stroke. Is there a check valve on this that could be stuck?