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Uni replacement foam for air filter

Discussion in 'XJ Technical Chat' started by KA1J, Apr 23, 2012.

  1. KA1J

    KA1J Member

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    Rebuilding a filter on my XJ1100 and the filter is unobtanium. I moded a K&N to an old filter frame as was done before me and it works well. I've put a Uni filter in my XJ650 with the understanding it was the same air flow characteristics as the original cloth/paper filter and have been happy with it.

    I got ahold of some UNI foam material, the green foam that's 5/8" thick and was going to use that and then went to re-oil my store bought Uni filter in the 650 and noticed there are two layers to the UNI foam on it; a green outside and a darker section underneath.

    The local bike shop said the green was all I needed to duplicate the air flow of the original cloth/paper filter. Anyone else done anything like this & found the single green piece is sufficient? I don't want to have an excessive air flow.

    Thanks.
     
    KA1J, Apr 23, 2012
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  2. FJ111200

    FJ111200 Active Member

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    FJ111200, Apr 23, 2012
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  3. KA1J

    KA1J Member

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    Thanks for the link. The only UNI foam they have is on UNI pods. Can't tell how that translates to my filter.
     
    KA1J, Apr 23, 2012
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  4. FJ111200

    FJ111200 Active Member

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    FJ111200, Apr 23, 2012
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  5. KA1J

    KA1J Member

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    Ah, that's the right one for sure and thanks for the effort in looking. I just can't pay that for a filter that needs replacing. The K&N & the Uni foams are reusable which makes them the only affordable thing I can look to do. If they were available like readily available filters are, I'd be fine with that but $65 shipped is too much.

    The K&N one I made works as it should but it flows too much air and I want to mimic the original filter flow, thus the question about the single green UNI material vs the stock filter.
     
    KA1J, Apr 23, 2012
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  6. oilheadron

    oilheadron Member

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    [/quote]The local bike shop said the green was all I needed to duplicate the air flow of the original cloth/paper filter. Anyone else done anything like this & found the single green piece is sufficient?
     
    oilheadron, Apr 23, 2012
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  7. PainterD

    PainterD Active Member

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    I do that to all my air filters. I've done both my cars, both trucks, both bikes, and the lawn tractor too. I gut the paper out of the old filter frame and glue in Unifoam. Never need to by paper filters anymore. Just take'm out, clean them with soapy water, oil them and re-install them.
    After seeing how K&N filters are made, I'd never use one for any of my engines. Unifoam is much better.
     
    PainterD, Apr 23, 2012
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