my 85 ironhead has taken to sending oil into the air cleaner at a great rate. is something wrong with the crankcase vent system? everything was fine until one day it started to puke oil all over the right side. Incoming search terms:ironhead oil separator installation info

I performed change of lube oil and its filters (fuel, lube, air cleaner, water separator) even the due for maintenance is far from schedule. I am suspecting the oil pressure sender to be the caused but how can I determine that it is really the cause and how to test whether it is functioning well?