Air Filter / external breather question
#1
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
#3
#4
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 06:22 PM.
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#6
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.
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 01:41 AM.
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#7
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?
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 Jackie Paper; 01-10-2019 at 07:34 AM.
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#9
Last edited by tunafisher729; 01-10-2019 at 10:08 AM.
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#10