I have read on several different forums that HD oil systems must have a sealed (not vented) oil tank to work correctly. This doesn't really make sense to me, so any info on this would be appreciated.
I am thinking of replacing the breather tube in the cam cover with a fitting and plumbing it into the tank to return the oil mist from the breather to the tank. This would require a non sealed tank with a breather screen type cap or some other way for the tank to breath. Anyone have any thoughts on this?