Oil Traces In Airbox??

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by DeeGee, Oct 25, 2012.

  1. DeeGee

    DeeGee I'm a Yorkshireman thanoz

    Joined:
    Jan 2, 2008
    Oddometer:
    1,889
    Location:
    Up North In The UK!
    I'm just servicing the bike after our latest adventure and I've just checked to see how the air filter is as I have Pyndon's per-filter fitted. There's a fair bit of oil on the front intake. Should I be worried at all and any suggestions as to why it's done it??
    A few pics below.

    Thanks

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    #1
  2. AdvGa

    AdvGa Long timer

    Joined:
    Nov 25, 2009
    Oddometer:
    1,320
    Location:
    Atlanta Metro
    You could try this:
    Bypass the Crankcase Oll Breather Hose to AirBox with a Filter and Cap the AirBox Inlet.

    http://www.advrider.com/forums/showpost.php?p=5429623&postcount=6





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    Also, you may have a Bad Crankcase Seal:

    http://ktmtalk.com/index.php?showtopic=408017

    Excess Blowby from crankcase breather, onto air filter

    In my case I fixed the excess oil blowby from the crankcase by replacing "shaft seal ring 12x20x5B " part # 0760122050
    avilable from munns racing online
    it is located in the alternator cover and seals the Crankshaft Balancer .
    if you do it you may want to order a new alternator cover gasket also

    evidently the crankcase pressure is metered and vents through the crank balancer shaft .
    If the seal is shot it blows major oil for some reason
    mine was rock hard and shrunken . It was blowing oil everywhere , especially when doing over 90 mph sustained

    fish picture courtesy of Munns " shop online" feature ;


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    #2
  3. DeeGee

    DeeGee I'm a Yorkshireman thanoz

    Joined:
    Jan 2, 2008
    Oddometer:
    1,889
    Location:
    Up North In The UK!
    I've got a pre filter fitted and looking at the air filter it's done a crackin' job as it looks new apart from the oil trace. Can't log onto the link for some reason :scratch
    #3
  4. VTwins4me

    VTwins4me Been here awhile

    Joined:
    Jun 24, 2007
    Oddometer:
    168
    Location:
    Thirsk, England
    My money is on prolonged high speed running - ie 200 miles @ 90mph?

    Clean it up & look again in a couple of weeks.
    #4
  5. KEELAYMONSTER

    KEELAYMONSTER BRRAAAAPPP!!!

    Joined:
    Feb 11, 2012
    Oddometer:
    229
    Location:
    Pleasanton, CA
    My 950 did the same. Found mine was due to a balancer shaft seal failure. The case breather port is right above this seal. Its very easy to check and replace. Just make sure you have a spare ignition cover gasket.
    #5
  6. TheMuffinMan

    TheMuffinMan Forest Ranger Magnet

    Joined:
    Mar 31, 2010
    Oddometer:
    7,563
    Location:
    Pueblo, CO, USA
    This, it's easy to change. Gasket is $25, and the seal is $10 or something.
    #6
  7. scorpion

    scorpion Two arm bandit

    Joined:
    Aug 10, 2004
    Oddometer:
    5,432
    Location:
    Planet Reno
    I just ordered the parts for my fix. I'll try and take some photos when I get in there.
    May install the K&N breather filter if I can get hold of one.
    There was an K&N part number floating around somewhere. . .
    #7
  8. Spark01

    Spark01 V-Twin

    Joined:
    Aug 29, 2010
    Oddometer:
    309
    Location:
    The Netherlands
    k&n 62-1110 this one i used
    #8