When I modified my air intake I disconnected the crankcase vent hose from the air intake plate and ran it under the bike. I was in Advance Auto today getting other supplies when I noticed crankcase air filters so I bought one.
The filter from Advance Auto.
I connected the air filter to the first few inches of the factory hose with a coupler I had lying around
Here is the breather on the bike. This is one of those simple mods.