Air filter set up.

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by rossguzzi, Aug 5, 2013.

  1. rossguzzi

    rossguzzi 990 Adv.

    Joined:
    Oct 21, 2012
    Oddometer:
    1,562
    Location:
    Bottom left hand side of OZ
    Im thinking of adding a uni pre filter to my 06 990. The one that replaces the snorkle. But I dont want it to make it run any leaner wich adding another filter may do.

    So it got me thinking. Could I just run the pre filter as the only filter. I would run a replacable/washable sock on it. The main filter in the airbox I would cut out the filter material and leave the rubber frame. This would give me a filter that is real easy to access and the carbs would be kept in a clean box.

    Has anyone running a prefilter found their main filter still gets dirty ?
    #1
  2. Boatman

    Boatman Membership has it's privileges ;-)

    Joined:
    Mar 9, 2005
    Oddometer:
    11,746
    Location:
    Petersburg, NY and Mill Spring, NC
    Yes the main filter still gets dirty. Running the pre filter only would be a bad idea for a number of reason but one issue in particular. The main filter is the seal for the air box. Without it, you'd be asking for trouble.


    Also,,,, you don't have to worry about leaning the mixture... the Uni Pre Filter actually slightly restricts airflow making it richer. Just a tad.
    #2
  3. Two Moto Kiwis

    Two Moto Kiwis Homeless Somewhere

    Joined:
    Apr 12, 2007
    Oddometer:
    4,220
    Location:
    Wanaka, New Zealand, ....What Trip!!!
    We found adding the pre filter richened Maya up a lot, black pipe and dropped MPG.

    We did the side door mod which sorted that out. I agree with Boatman it would be a bad idea not to run a main filter.
    #3
  4. skidxr

    skidxr Excuses

    Joined:
    Mar 7, 2006
    Oddometer:
    435
    Location:
    Durango, Colorado
    :kboom
    #4
  5. rossguzzi

    rossguzzi 990 Adv.

    Joined:
    Oct 21, 2012
    Oddometer:
    1,562
    Location:
    Bottom left hand side of OZ
    Ha, love the graphics.

    I thought it was a bit out there. The idea that is.
    #5
  6. boulder

    boulder jersey boy

    Joined:
    Jan 6, 2008
    Oddometer:
    140
    Location:
    sydney berowra waters
    I run the NU1427 filter with my pre filter and find this works really well.
    [​IMG][​IMG]
    #6