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jetting for 4 into 1 exhaust

Discussion in 'XJ Technical Chat' started by pageman, Feb 2, 2012.

  1. pageman

    pageman New Member

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    Can anyone give me any info on how to jet my 81 550 for a 4 into 1 Mac exhaust.
    Thanks
    Doug
     
    pageman, Feb 2, 2012
    #1
  2. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    Are you running a stock air cleaner, a K&N replacement, or PODS ??

    Typically, you go up 4 on your Main jet, ride it, checking the plug color and performance, then maybe make an additional change to Main or Pilot jets.

    success stories of PODS

    Use the SEARCH feature, look for threads about PLUG CHOPS and READING PLUGS.
     
    TIMEtoRIDE, Feb 2, 2012
    #2
  3. skyhawk

    skyhawk Member

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    I used the formula in Xj4ever's write up (you can find it in the parts catalog in the jetting section) It worked perfectly for me on my 82 550 Maxim using the aftermarket jets. If I remember correctly I went plus 2, if you need I can pull the invoice over the weekend and look for you.
    My bike only has 4 into 1 exhaust, NO Pods!
    TJ
     
    skyhawk, Feb 2, 2012
    #3
  4. pageman

    pageman New Member

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    I am running the stock air cleaner, Should I bump up the pilot jets also.
     
    pageman, Feb 2, 2012
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  5. skyhawk

    skyhawk Member

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    I went the next size up, also aftermarket, worked fine. I was able to lean it up as needed with the screw.
     
    skyhawk, Feb 2, 2012
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