1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Pod Question

Discussion in 'XJ Modifications' started by dawsoner, Feb 11, 2010.

  1. dawsoner

    dawsoner Member

    Messages:
    123
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Boulder, Colorado
    My Maxim-X came with pods, I did NOT take out the airbox on my own. Anyway, as Spring is approaching I am thinking about doing some work as I take it out of the shed that I probably should have done a long time ago.

    My carbs never seem to have been quite right, so I was trying to use Chacal's formula for determining proper jet size, can somebody check my work please?

    I have a 1986 XJ700 Maxim X the stock jets are:
    main fuel jet: #105
    main air jet: #120
    pilot fuel jet: #35/#37.5 depending upon source
    pilot ait jet: #140


    I have pod filters, stock 4 into 2 exhaust and operate primarily at ~6,000 feet above sea level, so according to the formula about half way down (http://www.xjbikes.com/Forums/viewtopic ... art=0.html).

    main fuel jet: #105 +4(for pods) -6(for elevation) -2(according to formula "Add up all the main fuel jet size increases and subtract 2 sizes") -2(mismatch conditions, stock exhaust with pod filters)
    =99 main fuel jets

    main air jet: #120

    pilot fuel jet: #35/#37.5 depending upon source, -1(elevation) +/-0 (pods, formula, mismatch, before elevation).
    =34 or 36.5

    pilot ait jet: #140



    so I should have:
    main fuel jet: 99
    main air jet: 120 (I couldn't find anything on adjusting air jets?)
    pilot fuel jet: 34 or 36.5
    pilot air jet #140 (I couldn't find anything on adjusting air jets?)


    What do you guys think? Did I do that math right?
     
    dawsoner, Feb 11, 2010
    #1
  2. dawsoner

    dawsoner Member

    Messages:
    123
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Boulder, Colorado
    anybody...?
     
    dawsoner, Feb 11, 2010
    #2
  3. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,843
    Likes Received:
    66
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    There's no Math.
    There's no Formula.

    Constant Velocity Carbs aren't designed for use with Pods.
    But, ...
    You can try ...
    You can try ...
    You can try ...
    You can try ...
    You can try ...
    You can try ...

    Somebody will be along with something you can try.
    I wish you luck.
     
    RickCoMatic, Feb 11, 2010
    #3
  4. Hillsy

    Hillsy Member

    Messages:
    634
    Likes Received:
    12
    Trophy Points:
    18
    Location:
    Australia
    Even with a stock exhaust I don't see how switching to pods and running smaller jets than stock would be right.
    You are de-restricting the airflow into the carbs by eliminating the airbox so I would imagine larger mains (at least) would be required.
     
    Hillsy, Feb 12, 2010
    #4
  5. jonrms

    jonrms Member

    Messages:
    212
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    England Uk
    I would honestly think that keeping the stock jets on would be ok.. your needing more air not more fuel. the problem you might have if you put another jet in might be flooding.

    but its a trial and error test sadly.. I recommend you buy 1larger and 2 smaller than stock.
     
    jonrms, Feb 12, 2010
    #5

Share This Page