Fuel off loading from the left tank to the right tank causing it to over flow.

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by ericGSsti, Sep 4, 2013.

  1. ericGSsti

    ericGSsti Been here awhile

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    So for the second time since I got the bike I've seen the Fuel cross load from the left tank to the right tank causing it to over flow. Both times its happened when it's on the side stand and I've filled the tanks earlier in the day. Spills out of it at a steady rate. I've opened both fuel tanks both times and the fuel level equalises. I've now closed of the right tank altogether to stop the fuel entering it from the left.

    Anyone come across this before?
    #1
  2. MortimerSickle

    MortimerSickle Semi-Adventurer

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    After performing the canisterectomy, route your vent hose up into the fairing to a point higher than the tanks. This should solve the problem.

    Shown here partially done.

    [​IMG]
    #2
  3. Jaimoto

    Jaimoto Spaniard in Chile

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    No canister on EU bikes.
    Eric, it sounds like the left tank is building pressure up and the only way to release this pressure is through the right tank. I would look for a pinched or clogged front ventilation hose in the left tank.
    #3
  4. ericGSsti

    ericGSsti Been here awhile

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    Mortimersickle thanks for the reply. Should have said it was a euro model.

    Goti. I'll have a look at that Friday when carrying out it's service. I had the tank off fitting an alarm so may have pinched something. Thanks for the reply.
    #4
  5. MortimerSickle

    MortimerSickle Semi-Adventurer

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    Would you not still benefit from the routing? or do you already have that?

    You don't need pressure in the left tank to overflow the right. On the side stand the left vent fitting is higher than that on the right, and so gravity is enough to do it.

    The high vent hose routing rises above both vents.
    #5
  6. ericGSsti

    ericGSsti Been here awhile

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    Definatley something I'll look at so.

    Thanks.
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  7. boy60

    boy60 Been here awhile

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  8. MortimerSickle

    MortimerSickle Semi-Adventurer

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    I have wondered about the Flapendectomy, but don't know how it works: does it not cause venting through, or around the cap? When on the sidestand, would it not let gas run out at the cap?
    #8
  9. Boatman

    Boatman Membership has it's privileges ;-)

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    His is going from the left to the right...... "uphill" on the side stand.
    #9
  10. MortimerSickle

    MortimerSickle Semi-Adventurer

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    Reading is hard. :D
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  11. ericGSsti

    ericGSsti Been here awhile

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    That is correct. Going from the left side tank to the right side tank. Couldn't find any pinched breather hoses on the left side.
    #11
  12. Jaimoto

    Jaimoto Spaniard in Chile

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    Did you check if it was clogged?
    #12
  13. ericGSsti

    ericGSsti Been here awhile

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    #13
  14. ericGSsti

    ericGSsti Been here awhile

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    No actually. I'll check that tomorrow when finishing the water pump and service.
    #14
  15. gefr

    gefr Life is a trip

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    but too tightly bent. Then when getting hot, they soften and pinch.
    Cheers.
    #15
  16. ericGSsti

    ericGSsti Been here awhile

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    When I stripped everything off completely for the service today I found a pinch in the main breather hose. It had been caught between the tank and frame.

    Thanks for your help lads.
    #16
  17. Rodknee

    Rodknee the post is mightier than the sword...

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    awesome! good to know. glad you got it sorted. :clap
    #17