Gotta use your imagination and time to get this how you envision it.
On my wife’s bike I connected two 10” hoses to a t fitting. Than added a hose of about 35” from the t. Ran in between the two jugs. Along the primary towards the front. To the down tube. And zip tied it right there on the bottom. Cut it and done.
no kinks and none of it on bike.
Its not rocket science LOL

 

yea well that's not quite what highwayman was suggesting was it? I think your suggestion is pretty much the norm.. but thank you rocket scientist. Always an ******* ain't there?

 

Here is how I did my breather bypass on my ‘17 Tri Glide.


Hoses run to a T fitting the through a hole in the backing plate.

Small catch can held in place with a cut electrical conduit clamp.

 

Perfect solution The Q

 

Looks good. I’m thinking about doing the same thing, but was wondering about putting the T down lower as I was concerned about it going up top straight across....want to assist with gravity to make sure the snot goes out the T to the rear. Have you noticed any issues or am I overthinking this?

 

I think you are overthinking it a bit since in stock configuration the breather lines run uphill before they enter the intake. I realize the line entering the intake is assisted a bit by some draw from the intake but the breather lines are pressurized so I’m not concerned with wanting to eliminate any uphill run in the external breather line.

 

I realize there are some aesthetic reasons to have the catch can or filter inside the air cleaner compartment, and that certainly takes care of keeping the oil out of the combustion chamber...and that is a big reason to have an External Breather System.

However, the hot, oxygen depleted air is still going into the combustion chamber, compromising performance. For the full benefit on an EBS, the filter or catch-can should be outside of the air cleaner box, so that only fresh, oxygen rich air reaches the combustion chambers.

Of related interest. We have done hundreds of dyno pulls with dozens of different air cleaners, and one thing we've learned-

What the air does AFTER it get past the filter element, in terms of flow, can make very significant differences in the amount of power generated. Anything slowing down the flow of air (turbulence, etc.) will have a negative effect.

 

OK Kevin. causes a question.. HD has just starting offering several sizes of intakes.. Is there any advantange to use one in a Stage 1 upgrade ??

Geary

 

Of little value in a stage 1 if you ask me. even on bigger engine builds you only get about 3-4 more hp from it. But from what I can tell, its only useful in larger displacements with ported heads because those builds can use more air than a stock throttle body can supply.

 

The catch can in my picture is on the back plate of an SE air cleaner. No hot gasses entering the intake from the catch can.