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Rebuilt seca 750 carbs now choke problems??

Discussion in 'XJ Technical Chat' started by Robert Powell, Jul 17, 2018.

  1. Robert Powell

    Robert Powell New Member

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    Hey all!! I rebuilt my XJ750 Seca carbs and now when starting cold it doesn't rev up to 2500+with the choke any more! I have to choke it about 25% and then it just barely starts and idles roughly about 1000 rpm!? After a minute or so I can play with the choke and throttle and get it to 2500 or so. Once warm she runs pretty darn good. Stock box and pipes.. Any ideas?? Thanks in advance,Bob!!!! :)
     
    Robert Powell, Jul 17, 2018
    #1
  2. Toomanybikes

    Toomanybikes Well-Known Member

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    Full rich in the warmer weather may be unnecessary. And one spot in carb bowls may cause a problem. The small port in the bowl is easily clogged and will pose a problem
     

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    Toomanybikes, Jul 18, 2018
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    Colin 85 700 and k-moe like this.
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    I don't need enrichment at all most days in the summer, and when I do giving it too much will make her more difficult to start and idle.
     
    k-moe, Jul 18, 2018
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  4. Colin 85 700

    Colin 85 700 Active Member

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    Warm weather, I start full choke, once barks, no choke n throttle, add choke till it runs 1/2 or less usually... Try that? :)
     
    Colin 85 700, Jul 19, 2018
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  5. Colin 85 700

    Colin 85 700 Active Member

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    If it's warm I crank it and snap the throttle like a 2-stroke, barks up every time!
     
    Colin 85 700, Jul 19, 2018
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  6. Colin 85 700

    Colin 85 700 Active Member

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    See the thread.... To the Max gonna need some pointers, there's a picture there and comment by me on the choke circuit, this may be your issue, as mentioned above.... Tiny choke jet
     
    Colin 85 700, Jul 19, 2018
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  7. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    You shouldn't need any. Of course that depends on what you consider warm to be.
     
    k-moe, Jul 19, 2018
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  8. Minimutly

    Minimutly Well-Known Member

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    It also depends how well your idle mix is set up.
     
    Minimutly, Jul 19, 2018
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  9. Toomanybikes

    Toomanybikes Well-Known Member

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    I could sell him a set of done to the church carbs.
     
    Toomanybikes, Jul 19, 2018
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