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Yamaha xj750 performance jets

Discussion in 'XJ Technical Chat' started by Tafshaft, May 22, 2024.

  1. Tafshaft

    Tafshaft Member

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    So my 1982 Yamaha XJ750 Seca (Canadian) works fine up until around 8-9000rpm where it feels like it's bogging down or not getting enough gas,

    Are keyster performance jets fine for fixing it with bigger jets?

    Kit includes the following:
    4 x #42 Pilot Jets
    4 x #125 Main Jets
    4 x #130 Main Jets
    4 x #135 Main Jets
    4 x #140 Main Jets
    4 x #145 Main Jets
    8 tuning washers

    Any input is appreciated.
     
    Tafshaft, May 22, 2024
    #1
  2. Minimutly

    Minimutly Well-Known Member

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    More info needed. Is it original or has it been modified in any way?
    If original you shouldn't need alternative jets, you have an issue...
     
    Minimutly, May 22, 2024
    #2
  3. Tafshaft

    Tafshaft Member

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    It's got pod filters on it
     
    Tafshaft, May 22, 2024
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  4. Tafshaft

    Tafshaft Member

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    Purchased some jets, not sure whether I should put in #125 or #130 first.

    I guess pilot jets won't need any change as they're good already.
     
    Tafshaft, May 23, 2024
    #4
  5. Kevin Damms

    Kevin Damms New Member

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    I have a stock xj 750 can I change it to pod breathers ? Will I need to change the jets or adjust the carbs?
     
    Kevin Damms, Aug 4, 2024
    #5
  6. Huntchuks

    Huntchuks Well-Known Member

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    Sure, you can do whatever you want. Be prepared for endless tuning issues, money spent on many different jetting options, multiple pulling and reinstalling carbs, the possibility of the bike never running right. Best choice: keep the airbox.
     
    Huntchuks, Aug 5, 2024
    #6
    Kevin Damms, Franz and Simmy like this.

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