crankcase ventilation
Road Warrior
Joined: May 2013
Posts: 1,430
Likes: 55
From: Florida
Here's my set up, I've been copy/pasting this for a while in several Breather Vent threads, The only problems I've had are the Petcock wouldn't drain, Got clogged up so switched to just a threaded plug. One time I let it go too long without draining and bit dripped a little. I took it off the other day for cleaning and that cone shaped vent/filter was building up gunk inside. I may need to replace it with another type filter but don't want to have to move the can lower. Also that red rubber plumbing gasket material was drying out and getting brittle and cracking, So replaced it with a new piece.
I still think I came up with one of the best/cleanest looking,invisible mods so far.If I do say so myself.
Copied and pasted my solution from one of the many threads about crankcase breather venting.
Also lots of good info, ideas, and photos in this thread,
https://www.hdforums.com/forum/touri...-included.html
This is what I came up with after being unable to find any system that would work with a SE stage one backplate, I went with dual hoses parallel to bottom of rocker box covers then down to hidden catch can in cowbell. Marine shrink wrap over fittings tapped into backplate really cleaned it up.
This is why. I didn't have a lot of oil drippng, But enough to make a mess on cam cover,pipes,side cover,and front of saddle bags if I didn't clean the filter every week or so. It looks like this because the moisture and oil are being shaken like a paint mixer in the cowbell. Glad this gunk isn't going in my intake.
I still think I came up with one of the best/cleanest looking,invisible mods so far.If I do say so myself.
Copied and pasted my solution from one of the many threads about crankcase breather venting.
Also lots of good info, ideas, and photos in this thread,
https://www.hdforums.com/forum/touri...-included.html
This is what I came up with after being unable to find any system that would work with a SE stage one backplate, I went with dual hoses parallel to bottom of rocker box covers then down to hidden catch can in cowbell. Marine shrink wrap over fittings tapped into backplate really cleaned it up.
This is why. I didn't have a lot of oil drippng, But enough to make a mess on cam cover,pipes,side cover,and front of saddle bags if I didn't clean the filter every week or so. It looks like this because the moisture and oil are being shaken like a paint mixer in the cowbell. Glad this gunk isn't going in my intake.
Road Warrior
Joined: May 2013
Posts: 1,430
Likes: 55
From: Florida
My hoses run parallel/level with the bottom of rocker boxes, Then down to cowbell. No uphill travel. FXDC 9163 I zip tied hoses to intake manifold and made sure there is no extra length in hoses to hump up. Makes installing/Uninstall a pita.
Thread Starter
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Advanced
Joined: Oct 2014
Posts: 85
Likes: 0
From: Oceanside, CA
I'll double check, but I'm pretty sure my hoses don't hump up too much. I think I cut them a tad short for the T connection.
where's the horn mounted now?. excellent engineering!, ill admit that it will eliminate the oil being routed through the combustion chamber to be burned off. your piston tops will probably be cleaner as will the throttle body. but there will be "0" horsepower/throttle response increases/changes from this mod. im not raining on what you did, it is great work at concealing the can, equal to a factory component!.
Lots of us have been re-routing these since Harley started having to route the hot oily oxygen depleted air into the air cleaner per the EPA many years ago.
Not only is hot air a negative for power, oil does not combust like gas and air, & that air is mostly exhaust gases, depleted of oxygen (which is the purpose of air in the combustion chamber). All power robbers.
Here you can see the clear difference in power-
That crap also gums up carbs, the IAC in throttle bodies, and builds carbon deposits on pistons. Just nothing good about it at all.
Some of the external breathers in this thread are really nice. For easy bolt-on external breathers, take a look at this LINK
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Road Master
Joined: Dec 2012
Posts: 848
Likes: 30
From: CO
I really don't understand the perceived need to hide these modifications. Who are you hiding them from? You guys do realize that the EPA doesn't have field agents who inspect our bikes, right? Also, nobody who isn't an expert on bikes knows anything about crankcase ventilation. So who are you guys so afraid of? Just run the **** to the ground like it was meant to be and be done with it.
Thread Starter
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Advanced
Joined: Oct 2014
Posts: 85
Likes: 0
From: Oceanside, CA
I really don't understand the perceived need to hide these modifications. Who are you hiding them from? You guys do realize that the EPA doesn't have field agents who inspect our bikes, right? Also, nobody who isn't an expert on bikes knows anything about crankcase ventilation. So who are you guys so afraid of? Just run the **** to the ground like it was meant to be and be done with it.
Road Warrior
Joined: May 2013
Posts: 1,430
Likes: 55
From: Florida
Same here.
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