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  1. #1
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    Default DIY air filter help

    Ok so I want to put one of those badass looking forward facing aircharger air filters on a 2003 sportster 1200...wondering if anyone has any info on a cheaper version or how hard it would be to make one. I'm a welder/ metal worker so I can do the brackets and the right angle pipe but is there more to it like sensors and shit??? Anything? Any help? Thanks guys

  2. #2

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    No sensors on carbs man just support the carb make a mount on the right angle hose clam with a k&n or something of the like you should be good to go man.

  3. #3
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    3/8" stainless flange was cut out by a friend on a laser, but there are probably other ways to get it done. Stainless elbow from McMaster-Carr for about 12 bucks. K&N filter for about 50 bucks. This one fits the original butterfly Keihin, so I had to make an adapter to run it on the CV.


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    Thanks for the help guys, I'll post an update once I get to work on this thing


    Sent from my iPhone using Tapatalk

  5. #5
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    Default DIY air filter help

    Wait a minute...just realized I don't know what size the pipe has to be??? Anyone know the Outside diameter of the pipe I need for a k&n filter or I guess any filter?


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    Measure the inlet of your carb. A CV is approximately 2-1/8", so use an elbow with an i.d. closest to that. You want "tubing" not "pipe". Tubing is measured by the o.d., pipe is measured by the i.d. Here's a link to the elbow I used, but the price went up since I built mine.
    http://www.mcmaster.com/#3-a-butt-we...ttings/=pr48zb

  7. #7
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    K&N makes all different sizes of filters, go to their website and search by size & shape.
    http://www.knfilters.com/search/univcone.aspx

  8. #8
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    Thanks a lot man really appreciate all the help




    Harley Fucking Davidson

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