Youll have to seal the holes for the hoses and block off the breather filter to isolate the intake from the breather filter and unfiltered outside air.

 

Fabbed up a little plastic box to enclose the breather. Sealed up all gaps around hoses and whatnot. Looks like hell but I feel it will be completely effective. All hidden by the football anyway.

 

That'll work and it's hidden nicely.

 

I'm keen to do something like that.

Any chance that you have photos of the reverse side - what silver connectors did you use for the black pipes, and where did you get the black tubing.

Does it spit oil onto the engine?

 

I used the stock z shaped tubes cut in half to make a L shape, 90 degree elbow off of the breather bolts. The long tubes are 1/4 vacuum line, dirt cheap at any auto parts, straight on to the nipples of the breather element. Tube connectors are for 1/4 tubing, also very cheap at any auto parts. You can find breather elements very small on eBay . If it only has one nipple, "" T " your two tubes together into one tube to the nipple. There is plenty of room inside the ac to do so. Where I messed up was not finding a smaller element, but it all worked out good.
After doing this mod, my gas mileage has noticeably increased. I went on one of my usual rides today, 120 ish miles, used MUCH less gas. Bike seems to run a little better, not sucking in hot crank case air.
I never had any oil in my air box in the first place, so I'm not worried about running a tube to the ground to let it dump. Don't forget to seal the breather tube holes in the back side of the air cleaner element.

 

NutZ ---- Any chance of getting this link to work again? These pics helped me a lot, but I didn't take any of my own as they're quite similar.

Thanks...

 

sure thing.. here you go

https://www.dropbox.com/sh/jgddr5adn...otataUy7a?dl=0

 

Perfect - thanks! About the only thing I did differently was make the Tee behind the backing plate lower so there wasn't any uphill run.

I bought 1/4" silicone hose which is really flexible and almost disappears behind the pushrod tubes/motor fins to run down and out. Very clean set-up and I couldn't be happier with it.

 

What are the pros/cons to running up/down vs the heads butterfly breather elevation in running the exit tubing?
I've seen a number of setups over the years since HD started using the 'vent to intake' system and guys running both directions. Just curious.
I've always run mine down, but some say the slight amount of oil in the mist, if the tubing runs up, will drain back into the crankcase.
Thoughts? Much appreciated.
Thanks JetD

 

that's what logic would have you believe anyways. I run down simply for the laws of gravity and no other reason. I don't see a benefit otherwise in doing it one way vs the other. Just my .02