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Rejet for velocity stacks and open pipes

Discussion in 'XJ Technical Chat' started by Obri, Mar 5, 2014.

  1. Obri

    Obri New Member

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    Later today I will be putting 122.5 main fuels in my xj650rj that I was recommended by a drag bike builder to run with velocity stacks and open exhaust. I will let everyone know how it turns out and maybe solve the misery and mystery of the vs stacks and pipe mods
     
    Obri, Mar 5, 2014
    #1
  2. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    Just wondering how he arrived at 122.5 ??

    Did you read thru these ??

    success stories

    advise and debate

    I would have suggested 116 - 118, depending on how "open" the pipes are.
     
    TIMEtoRIDE, Mar 5, 2014
    #2
  3. Thrasher

    Thrasher Member

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    Don't forget the needle and pilot jets.
     
    Thrasher, Mar 5, 2014
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  4. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    I don't know why anyone would run open velocity stacks on a street bike, honestly. Seems rather engine-life limiting.
     
    bigfitz52, Mar 5, 2014
    #4
  5. MarkV

    MarkV Member

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    why open anything as far as air intake. Im with you fitz, destruction. I have stacks on my bike, but with filters. Ran great as of last october, chocolate plugs, good mph. Im good,
     
    MarkV, Mar 5, 2014
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  6. MarkV

    MarkV Member

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    why open anything as far as air intake. Im with you fitz, destruction. I have stacks on my bike, but with filters. Ran great as of last october, chocolate , or should I say coffee plugs, good mph. Im good,
     
    MarkV, Mar 5, 2014
    #6
  7. MarkV

    MarkV Member

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    why open anything as far as air intake. Im with you fitz, destruction. I have stacks on my bike, but with filters. Ran great as of last october, chocolate , or should I say coffee plugs, good mph I wasnt looking to gain power, but but frame mods required it. . Im good,
     
    MarkV, Mar 5, 2014
    #7

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