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Question about bench synching carbs

Discussion in 'XJ Technical Chat' started by whiplash, Jul 20, 2015.

  1. whiplash

    whiplash New Member

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    I was wondering if the idle adjustment screw should be backed out all the way or not. I have looked at bench synch instructions but still not sure. That`s why I ask this question. Thanks in advance for answer.
     
    whiplash, Jul 20, 2015
    #1
  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    it does not matter. the sync is to equalize the opening gap of the butterflys.
    if you have the butterflys open with the idle screw you are still looking to equalize the gap.
    you will have to set the idle when you get the bike running which may or may not be the point you have it set to bench sync. it would probaly be best to use idle screw to adjust to the point where your "tool" fits under the first butterfly that allows tool under, then adjust the rest to match. this would ensure minimal turning of the remaining screws to equalize.
     
    Last edited: Jul 20, 2015
    XJ550H, Jul 20, 2015
    #2
  3. rocs82650

    rocs82650 Well-Known Member

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    Are you bench synching? Use the idle knob to gently bite a strip of index card or a paper clip @ #3. Use the adjustment screws and strips to set the rest to #3.

    Gary H.
     
    rocs82650, Jul 20, 2015
    #3
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  4. k-moe

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

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    What Gary said.
     
    k-moe, Jul 20, 2015
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  5. whiplash

    whiplash New Member

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    Thank you for all your answers. They have helped to clarify how to sent idle adjustment screw.
     
    Last edited: Jul 21, 2015
    whiplash, Jul 21, 2015
    #5
  6. Skwerly

    Skwerly Member

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    Nice, good to know!
     
    Skwerly, Jul 21, 2015
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  7. MattiThundrrr

    MattiThundrrr Not a guru

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    Well written, Gary!! I've read a few "how to" threads about the bench synch, and it never really got through my thick skull till I read the "gently bite" part. Then I got sidetracked by gentle bites... :confused:
     
    MattiThundrrr, Jul 23, 2015
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  8. Skwerly

    Skwerly Member

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    Hey now... :D
     
    Skwerly, Jul 23, 2015
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  9. rocs82650

    rocs82650 Well-Known Member

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    rocs82650, Jul 23, 2015
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