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throttle shaft seals

Discussion in 'XJ Technical Chat' started by joejr2, Jan 15, 2016.

  1. joejr2

    joejr2 Active Member Premium Member

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    I'm about to rebuild a set of carbs from late "81" xj650 maxim. On this set I would like to
    replace the throttle shaft seals and maybe the fuel rail "O" rings. Is there an exploded view
    somewhere showing these components ? The hitachi #32 exploded view that the various parts
    houses use doesn't indicate the throttle shaft seals or the fuel rail "O" rings. Also, is there a
    tutorial that has been posted on this forum describing the replacement of these two components ?
     
    joejr2, Jan 15, 2016
    #1
  2. k-moe

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

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    k-moe, Jan 15, 2016
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    XJ550H likes this.
  3. Xjrider92117

    Xjrider92117 Active Member

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    plus one on what K-moe said. There a few more rubber orings that should be replaced as well normally found in a carb rebuild kit. Beware of the ones for sale on ebay. I bought a kit from ebay and ended up getting the correct size orings forms chacal.
     
    Xjrider92117, Jan 15, 2016
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    make sure to take photos as you dissemble the carb noting the springs orientation.
    you will have to file down the screws from the back that hold the butterflys onto the shaft
     
    XJ550H, Jan 15, 2016
    #4
  5. Stumplifter

    Stumplifter Well-Known Member

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    I THINK that only the Mikuni's need the butterfly screws filed on the back. My Hitachi's did not require any filing.

    Agreed, pictures, notes, drawings, whatever it takes for you to put things back from whence they came . . . unless someone else went through the carbs and put parts back in the wrong place! :eek:
    Do you have brass plugs covering your air/fuel mixture screws? This could indicate that the carbs have not been toyed with.
     
    Stumplifter, Jan 16, 2016
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    k-moe likes this.
  6. k-moe

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

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    +1 The Hitachi throttle plate screws tend to be peened less aggressively than the Mikuni's. I'd still recommend having a close look, and a screwdriver that is in excellent condition.
     
    k-moe, Jan 16, 2016
    #6
  7. rocs82650

    rocs82650 Well-Known Member

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    I'll add two things:
    1. Make certain you mark the orientation of the throttle plates during dis-assembly.
    2. Get a piece of thick plate glass (like from a old furniture table) large enough to fit the rack. It'll align the face of all the carbs during re-assembly.

    Gary H.
     
    rocs82650, Jan 16, 2016
    #7
  8. k-moe

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

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    Thick plexiglass works for aligning the carbs as well, and is less likely to get broken in the shop. I sometimes use the top of my tablesaw instead.
     
    k-moe, Jan 16, 2016
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