This is an EPA requirement, but let me point out two things here; the engine is designed to breath clean air, not partially burned emissions and gases. The other point I want to make, is that the oil collected in the reservoir under the seat, has nowhere to go. The PCV breather has a one way reed valve that prevents gasses or fluid from entering the crankcase. So that crap sits there in the collector box.
Once I got rid of that, I had to replace the factory breather valve with something decent looking and still had to vent the gas out somewhere. I decided to get a K&N kit designed for this; it has a hose and filter that goes on the end to catch the oil mist
|TPO calls it a "remote" crankcase breather kit.Has a hose that allows you to |
vent out the back of the bikethrough a small K&N filter
I also bought a new breather valve from STM I oversleeved the black hose the kit came with in braided steel for looks, its pretty cool. The hose is routed under the seat and vents out the back of the bike away from everything.