Fuel leaking from carb

Discussion in 'Dakar champion (950/990)' started by wiseblood, Feb 6, 2017.

  1. wiseblood

    wiseblood Quid Quo Pro Supporter

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    This is a 2007 950 SMR. This morning, fuel started dripping from the airbox drain hose while I was warming up the bike to go to work. After taking the tank off and looking inside the airbox with the motor running, I found the leak:

    upload_2017-2-6_10-57-44.png

    Fuel is coming from the behind the brass connector going into the carb body. :bluduh

    There is no option on the fiche to purchase JUST those o-rings! Instead:

    upload_2017-2-6_10-59-41.png

    :bluduh :finger

    No way am I going to pay $140 for three friggin' o-rings. :nono

    Anyone know the size of these buggers, or a better source?

    Thanks!! :beer
    #1
  2. oldfuddy

    oldfuddy Long timer

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    IMG_6127.JPG

    You can buy them individually. I bought a bunch and got free shipping. Did a few bikes. Get at least 6 and do both inlets.
    #2
  3. wiseblood

    wiseblood Quid Quo Pro Supporter

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    Cool!! Is that the right size?
    #3
  4. oldfuddy

    oldfuddy Long timer

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    Yes. Works on the SE air vent inlets too.
    #4
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  5. wiseblood

    wiseblood Quid Quo Pro Supporter

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    :beer :beer :beer :beer :beer :thumb

    Thanks!!
    #5
  6. oldfuddy

    oldfuddy Long timer

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    IMG_6146.JPG
    #6
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  7. effensteve

    effensteve Enjoying the ride

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    I bought mine from the local hardware store for about 10 cents each. They've been good for over a year now.
    #7
  8. oldfuddy

    oldfuddy Long timer

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    That's great your store had some. Not all hardware stores carry viton. Some carry oil resistant o-rings, but not gas resistant. That said, I've run non viton o-rings in a dirt bike and lasted at least a couple years without leaking.... but I'd never recommend to an inmate to run non viton or non gas resistant o-rings, except to get the bike home from a trip and then fix it correctly.
    #8
  9. wiseblood

    wiseblood Quid Quo Pro Supporter

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    So, I pulled the carb today:

    [​IMG]

    Removed the connectors from the carb body:

    [​IMG]

    FYI, one on the left was the leaky one – but I'll be renewing all the orings:

    [​IMG]

    I could definitely feel it moving a bit before I removed it. Clearly, the rings are dried out and flattened.

    Removal is super simple... mostly. Just remove the four Phillip bolts holding the right side of the carbs together, and pull the connectors out.

    [​IMG]

    FYI, I think those screws are secured with RED loctite:

    [​IMG]

    Three came out with a regular amount of force. The fourth one was well and truly "fixed" when I was done with it. :lol3 I stripped out the screw hole, and had to reach for the left-handed drill bits:

    [​IMG]

    New o-rings arrive from oringsandmore.com tomorrow. (Best name of a company ever. :lol3 Thanks, @oldfuddy!! :beer)
    #9
  10. wiseblood

    wiseblood Quid Quo Pro Supporter

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    What's that hose in the middle? You mentioned an "air inlet" – the only thing I can think of like that on my bike is the carb venting hoses. They connect to these things:

    [​IMG]

    Are these the same thing? I couldn't figure out how to remove them, and didn't want to force it too much. (It didn't unscrew or pull out – at least not with the level of force I was willing to use.)
    #10
  11. oldfuddy

    oldfuddy Long timer

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    My so-called smart phone won't display the pic.., but if your talking about the fixed plastic black nipples, leave them alone. Your working the SM, the SE for some reason has an extra set of carb vents with brass nipples like the fuel inlets. There's one o-ring for each fitting on the SE. Some folks either cap that vent or connect the two carbs together in the SE. I've done it both ways and didn't notice a difference. I don't recommend pulling the black carb vent nipples off. Of note, I recall an early build '06 SE that did not have the typical SE brass vents and was similar to the SM set up. Dunno....


    EDIT: Ok. on a real computer now......

    Yes, definitely leave that black plastic piece in. If you look at your pic of both carbs on the bench and right above your TPS on the right side carb you'll see a port blocked/capped off. On the SE a brass swivel fitting with one o-ring goes there.
    #11
  12. wiseblood

    wiseblood Quid Quo Pro Supporter

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    Removed old o-rings (which were hard and brittle – most broke when removing them). Cleaning up fuel connectors:

    [​IMG]

    [​IMG]

    Installing new o-rings:

    [​IMG]

    [​IMG]

    Boom!

    [​IMG]

    :beer :thumb
    #12
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  13. MiniNL

    MiniNL Dutchie in the US

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    Man with all these threads about fuel leaking out of carbs, mine are bound to go this year or maybe it's time for my water pump. Or the fuel pump, lol. Anyway, saved the info, thanks.
    #13
  14. phixmup

    phixmup возьми

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    Just replaced mine today, original owner since 06' lasted 11 years:1drink
    [​IMG]
    Just used a impact to remove the red locktite screws
    [​IMG]
    took a whopping 15min tops to replace them, thanks to the POWERCELL tank
    [​IMG]
    Of course the dealer didn't have the O Rings in stock but we matched them up with a Kawasaki KX O Ring
    #14
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  15. desertRdr

    desertRdr Adventurer

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    screws_JIS_phillips_pozidriv.jpg The screws on Japanese carbs are JIS. They can be identified by the dot on the head of the screw. I bought some JIS screwdrivers and man what a difference. I don't want to carry JIS screwdrivers with me on travel, so I replace them all with Allen head.
    #15
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  16. creatureg

    creatureg n00b

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    Anyone have the part number for those O'Rings from Oringsandmore.com ?? I searched around on the site but couldn't find the ones y'all ordered.

    Thanks Graham
    #16
  17. Boatman

    Boatman Membership has it's privileges ;-) Supporter

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  18. creatureg

    creatureg n00b

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    THANK YOU!
    #18