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Help Carb issues - GSXR

Discussion in 'Suzuki 250cc In-line 4's' started by Marius, Mar 18, 2015.

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  1. Marius

    Marius Member

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    Hi of recently bought. A Suzuki Gsx-r. 250 earlier version GJ72A had carb issue when I bought it. The problem is when I start it after a few minutes fuel would leak at rear of carb through vents leading to the emulsion tubes. Floats are set.
    New parts
    Float gaskets, float needles, float seats and other-rings, main jets, or-rings, washers and springs on pilot screws and jet needles.
    Still waiting for the needle jets to arrive from Japan. Any advice please
    Thanks in advance

    DSC_0135.JPG
     
    Marius, Mar 18, 2015
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  2. Willrcr15

    Willrcr15 Well-Known Member

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    You say it's all re built but it's leaking / flooding?
    The description is a bit vague, are the tubes openings in the carb body or hoses.
    Do the floats actually float, try them in a cup of fuel.
     
    Willrcr15, Mar 18, 2015
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  3. Joker

    Joker See "about me" for contact details. Contributing Member

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    You're not running the fuel tap on the "PRI" setting are you? Is it a vacuum fuel tap? My bandit is (GJ74A)
     
    Joker, Mar 18, 2015
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  4. Joker

    Joker See "about me" for contact details. Contributing Member

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    Hmm. Are the slides moving freely? If the spring wasn't sitting central in the plunger the needles could be stuck allowing fuel to leak through.
     
    Joker, Mar 18, 2015
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  5. Marius

    Marius Member

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    Leaking out the bigger vents for the main jets

    DSC_0194.JPG
     
    Marius, Mar 18, 2015
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  6. Marius

    Marius Member

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    Slides moving fine spring in centre. What I noticed the emulsion tubes are 2 types 2 with 12 holes and 2 with 6 holes I did not take note where I took each one out. Can you maybe show me in the right direction where the different tubes go
     
    Marius, Mar 18, 2015
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  7. Joker

    Joker See "about me" for contact details. Contributing Member

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    Maybe this helps. Let me know if you need anything in particular translated. @Boydie77 @Simon any insights guys?

    Capture.JPG
     
    Joker, Mar 18, 2015
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  8. Joker

    Joker See "about me" for contact details. Contributing Member

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    Hang on, try this instead

    Capture.JPG

    The workshop manual is in the forum's "resources" section available to premium members too.
     
    Joker, Mar 18, 2015
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  9. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    and I will have full seal kits available in about 3 weeks.
    Cheers
    Blair
    [​IMG]
     
    maelstrom, Mar 18, 2015
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  10. Willrcr15

    Willrcr15 Well-Known Member

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    I'm not sure I'm with you guy's, slides & springs ?
    It'll be the fuel inlet needles sticking or not right to flood like that.
    Did the inlet seats get replaced as well.
    The o ring around the inlet seats can a problem if they are old.
    Nice work Fizz, that answers that.
    Are those openings the fuels leaking from a part of the choke system?
    Nice bike by the way, worth restoring, 45hp, looks like its all there & straight
     
    Willrcr15, Mar 18, 2015
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  11. Marius

    Marius Member

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    Does that mean 570 tube are for cylinder 2-3?
     
    Marius, Mar 18, 2015
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  12. Joker

    Joker See "about me" for contact details. Contributing Member

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    Yes I'd imagine so. THat's what the workshop manual depicts
     
    Joker, Mar 18, 2015
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  13. Marius

    Marius Member

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    will new needle seat and o-rings what's the correct spec for the floats just to make sure
     
    Marius, Mar 18, 2015
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  14. Marius

    Marius Member

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    Hi Maelstrom I've fitted 2 new gaskets yesterday because mine was shot.
    Thanks
     
    Marius, Mar 18, 2015
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  15. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Yes, sorry Marius. I got my threads mixed up and missed the start of this one.
    cheers
    Blair
     
    maelstrom, Mar 18, 2015
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  16. Marius

    Marius Member

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    hi Stu between the 2 carb om the front there's a vacuum pipe going from one carb to the other but on the workshop manual the rightside carb got a pipe going somewhere should that carbs be link like that

    DSC_0198.JPG
     
    Marius, Mar 18, 2015
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  17. Willrcr15

    Willrcr15 Well-Known Member

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    I don't know, should be fairly high, 1 bowl feeding 2 cylinders especially if theyre regular size bowls
     
    Willrcr15, Mar 19, 2015
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  18. kiffsta

    kiffsta Senior Member

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    NO NO NO, they are the overflow pipes..... please undo that hose, they vent to the air

    Here are some on an across

    Capture.PNG
     
    kiffsta, Mar 19, 2015
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  19. kiffsta

    kiffsta Senior Member

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    Hope these pics help, please remove the bent pipe

    gsx250f_carbs.PNG overflow.PNG
     
    kiffsta, Mar 19, 2015
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  20. Marius

    Marius Member

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    Thanks Kiffsta will remove that pipe and put 2 individual pipes on any specific routing where they should go.
    And thanks to all the guys you all been of tremendous help
     
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    Marius, Mar 19, 2015
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