Air Filter / external breather question - Harley Davidson Forums

Go Back  Harley Davidson Forums > Harley Davidson Motorcycles > Sportster Models
Reload this Page >

Air Filter / external breather question

Notices
Sportster Models 883, 883 Custom, 1200 Custom, 883L, 1200L, 1200S, 1200 Roadster, XR1200, and the Nightster.
Sponsored by:
Sponsored by:

Air Filter / external breather question

  #1  
Old 01-09-2019, 06:57 PM
tunafisher729's Avatar
tunafisher729
tunafisher729 is offline
New Member
Thread Starter
Join Date: May 2017
Location: So Orange County CA
Posts: 66
Thanked 4 Times in 4 Posts
Default Air Filter / external breather question

I have been doing some searches and trying to determine any performance or reliability benefits of modifying my XL1200N air filter to externally vent the oil breather. The hoses are getting old and I thought it might be a good opportunity to re-route them away from my filter. I think if I cap the ports leading to the filter I could just route some new hose downwards. I have seen from some searches that some route them all the way down the bike, others preferring to use a small catch filter. Any thoughts on a prefered method from someone happy with their modification? thanks for any input.

 
  #2  
Old 01-09-2019, 07:04 PM
RIPSAW's Avatar
RIPSAW
RIPSAW is online now
Extreme HDF Member
Join Date: Mar 2010
Location: Bates Motel, Fairville U.S.A.
Posts: 19,064
Thanked 593 Times in 511 Posts
Default

It's definitely a 10K Federal fine in your state. Don't do it. If everyone did it, what a crappy world it would be.

If you must, don't post like you don't care about the environment.
 
  #3  
Old 01-09-2019, 07:14 PM
Nelz's Avatar
Nelz
Nelz is offline
One Of The Regulars
Join Date: Jan 2016
Location: Danville, CA
Posts: 160
Thanked 32 Times in 30 Posts
Default

My bike had a catch filter when I first bought it used, but it was a little messy for my taste. I ended up putting on a Ness Big Sucker, which isn't too expensive, and it routes the oil mist back into the carb. Less mess and keeps people from scolding you.
 
  #4  
Old 01-09-2019, 07:16 PM
John Harper
John Harper is offline
Elite HDF Member
Join Date: Dec 2011
Location: Carlsbad
Posts: 3,834
Thanked 197 Times in 168 Posts
Default

Originally Posted by RIPSAW View Post
It's definitely a 10K Federal fine in your state. Don't do it. If everyone did it, what a crappy world it would be.
If you must, don't post like you don't care about the environment.
Be careful, RIPSAW, sarcasm sometimes doesn't come across as intended. I recently found out.

I've been looking at doing an external breather on my 1991 with the old original SE filter. After talking to DK Customs, it looks like there is not really a kit for my early model of SE filter. I could drill holes in the backplate and run hoses, but that was not something I was willing to do to make it work. Some kind of banjo setup would be better, but there is no kit apparently made for what I have. I'd have to drill out the hollow bolts myself and find some way to fit banjos to the spacer. Too much hassle for something that's worked for 28 years.

I was planning on running the breather hose down under the frame, perhaps with a small gauze type filter. I think a catch can would just be a pain in the **** without purpose. I'm not really sure how much oil you should expect, it seems to vary by owner and bike.

The folks at DK Custom were extremely helpful, I suggest you contact them and see what your options are. They have awesome customer service and relations.

John
 

Last edited by John Harper; 01-09-2019 at 07:22 PM.
The Following 2 Users Say Thank You to John Harper For This Useful Post:
DK Custom (01-10-2019), tunafisher729 (01-10-2019)
  #5  
Old 01-09-2019, 10:39 PM
WKNDS's Avatar
WKNDS
WKNDS is offline
Outstanding HDF Member
Join Date: Nov 2012
Location: Dallas area, TX
Posts: 2,136
Thanked 304 Times in 267 Posts
Default

old pic of my Arlen Ness Derby Sucker...




I have now switched to a different intake (velocity stack) for a different look.

T.
 
The Following User Says Thank You to WKNDS For This Useful Post:
tunafisher729 (01-10-2019)
  #6  
Old 01-10-2019, 02:18 AM
hscic's Avatar
hscic
hscic is offline
Club Member
Join Date: Dec 2014
Location: USA
Posts: 3,787
Thanked 356 Times in 309 Posts
Default

As John said: "The folks at DK Custom were extremely helpful, I suggest you contact them and see what your options are. They have awesome customer service and relations."

I used a completely discrete breather system made for the Arlen Ness Deep Cut Inverted AC by DK.



I also used double filtered breather bolts when I had a V-stack and an Outlaw 587



DK now carries the Stealth EBS which routes the breather up and between the rocker covers for a cleaner look. Since it routes up, it also minimizes/eliminates the oily mist being released onto the bike or into the atmosphere.
 

Last edited by hscic; 01-10-2019 at 02:41 AM.
The Following 2 Users Say Thank You to hscic For This Useful Post:
DK Custom (01-10-2019), tunafisher729 (01-10-2019)
  #7  
Old 01-10-2019, 08:08 AM
RIPSAW's Avatar
RIPSAW
RIPSAW is online now
Extreme HDF Member
Join Date: Mar 2010
Location: Bates Motel, Fairville U.S.A.
Posts: 19,064
Thanked 593 Times in 511 Posts
Default

John, my post was not meant as sarcasm and it is true. It is illegal to vent any modern motor vehicle used on the highway.
Especially in CA. My VA state inspection checks for it. (Sure not all)

FP ask for opinions. I just started mine. Is this wrong?
 

Last edited by RIPSAW; 01-10-2019 at 08:34 AM.
  #8  
Old 01-10-2019, 08:32 AM
apache snow's Avatar
apache snow
apache snow is offline
Road Captain
Join Date: Sep 2017
Location: over the mountain
Posts: 720
Thanked 144 Times in 121 Posts
Default

Damn, now the sky is falling. LOL
 
The Following User Says Thank You to apache snow For This Useful Post:
RedOregon (01-10-2019)
  #9  
Old 01-10-2019, 10:22 AM
tunafisher729's Avatar
tunafisher729
tunafisher729 is offline
New Member
Thread Starter
Join Date: May 2017
Location: So Orange County CA
Posts: 66
Thanked 4 Times in 4 Posts
Default

Originally Posted by RIPSAW View Post
It's definitely a 10K Federal fine in your state. Don't do it. If everyone did it, what a crappy world it would be.

If you must, don't post like you don't care about the environment.
thanks, for all the suggestions. I honestly never even considered the environmental impact. Iíve never heard of such a fine even here in California. Motorcycles once registered are not subject to further inspections. I think we have bigger fish to fry environmentally than some oily mist. You will subject the environment to hundred times more oil by changing an oil filter on a Harley-Davidson in that sideways position, lol. Iíve been around the motorcycling community for quite a while and have never experienced any problems. Personally, I think someone would be a hypocritical DB trying to call out someone riding a modified motorcycle. Again, thanks for the suggestions, now I think I'm going to pull out my old legally registered YZ125 2-stroke and go for a ride today and really burn up some oil


 

Last edited by tunafisher729; 01-10-2019 at 11:08 AM.
The Following User Says Thank You to tunafisher729 For This Useful Post:
RedOregon (01-10-2019)
  #10  
Old 01-10-2019, 10:39 AM
RIPSAW's Avatar
RIPSAW
RIPSAW is online now
Extreme HDF Member
Join Date: Mar 2010
Location: Bates Motel, Fairville U.S.A.
Posts: 19,064
Thanked 593 Times in 511 Posts
Default

Again, just stating a fact and only because you brought it up in your first post. Sorry. Carry on.
 

Thread Tools
Search this Thread
Featured Sponsors
Vendor Directory

Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: