Ok, so check out this pic with questions down below:



See the tiny 1/8" feed off the chain oiler? That same kind of tube sticks out the top of my pump where the Primary Chain Oiler is. On this picture it's blocked off. My question is how do you block it off? Does it unscrew? Is it threaded? Sure doesn't look like it's threaded. Right now the oil goes straight back into the suction feed on the case for Primary Oil Return.Yes, I run separate oil in my primary. So my setup is kinda half-assed.

 

It isn't threaded, pressed in fit. Couple ways to seal that off, find an auto parts place and pick up an assortment of vacuum port caps and a small wire tie to hold it on. You end up changing it every few years no big deal.

Next you can wiggle that tube out of the cover, tap threads in and run a screw down to seal it. Bit more involved but a permanent fix. Only issue is you can't reverse the fix if you want to got back the stock.

 

Pulled mine out,
Cut the head off(Bulb)
Sealed the end with plumbers solder&mapp gas,
Tapped it back in the hole,
No leaks or blowouts going on 5 yrs now,
Can reverse it if I wanted to but don't see that happening,