My first move would be to remove the stuffing of steel wool out of the breather port. It's not a good place for it.
Make sure that rubber vacuum hose is at least 5/16" I.D. tube.
Remove the PCV valve, and put a duckbill on the hose, or just get a small gatorade bottle and put two holes in the top, and run the breather hose into it, so it works as a catch can. Then get a duckbill on it when you can.
The catch can allows you to see what's blowing out, and not make a mess all over the bike. Zip-tie it to a frame member somewhere out of the way, temporarily.
Also, definitely check for the oil return system issues too.