Just got Mine to roll again, with new cyls, etc.
I added oil filter into return line (from a Panhead) some time ago. So now when I started "new" engine I could see how oil circulates. I wondered that last season also (now new cyls).
From return line oil comes at idle as pulses. Do not want to throttle much more now, when new things in. Seems like oil amount has to raise to some level in cranck-case and then it spits it out. As a "batch". Should it be constant flow or what?