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Carb diaphragm problem

Discussion in 'XJ Technical Chat' started by OzRoadbandit, Dec 13, 2012.

  1. OzRoadbandit

    OzRoadbandit Member

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    Idle hands seem to create work.... uggghhhh.
    I looked at the carbs sitting in the corner and curiosity had the better of me, what sort of condition are the diaphragms in? Not sure that I like what I see, splits on the creases..... all 4 of them.

    The million dollar questions. Can you get new rubber diaphragms ? (dont like my chances) has anybody smudged silicone over the splits and did it work ?
    Any other bright ideas ?

    Thanks for you help in advance I hope :)

    one of the diaphragms below

    [​IMG]
     
    OzRoadbandit, Dec 13, 2012
    #1
  2. maverickbr77

    maverickbr77 Member

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    maverickbr77, Dec 13, 2012
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  3. OzRoadbandit

    OzRoadbandit Member

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    Cheers Maverick .... just what the doctor ordered :D
     
    OzRoadbandit, Dec 14, 2012
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  4. mrblackstock

    mrblackstock Member

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    I recently bought a set of diaphragms from JBM industries and they were great! Easy to install, noticed the difference straight away, you might need to re-balance the carbs but.

    cheers, Gareth
     
    mrblackstock, Dec 14, 2012
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  5. xHondaHack

    xHondaHack Active Member Premium Member

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    I would like to second the motion on the JBM diaphragms. I used them on a one of my carb sets and they are an excellent replacement for those tired old ones, and at a reasonable price. Make sure you measure your carbs properly before ordering by using the guidelines provided on their website.

    Tony
     
    xHondaHack, Dec 14, 2012
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  6. 79xs

    79xs Member

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    I have used thin coats of gorilla glue to repair small pin holes before. Replacing them is always best in the log run. JBM's prices are pretty good.
     
    79xs, Dec 16, 2012
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  7. RickCoMatic

    RickCoMatic Well-Known Member

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    This technique works GREAT!

    "The RickCoMatic Patch" ©

    Diaphragm Rubber Repair:

    Clean the Rubber with isopropyl alcohol.
    Apply MASKING TAPE to the OPPOSITE SIDE of the Repair.
    (Holding the tear together > Perfectly< )
    Cut the nozzle off a small Funnel to act as a form.
    Tape the Rubber to the Form.
    Make sure Rubber is not buckled or wrinkled.
    [​IMG]

    Salvage some "Repair Material"
    (I used a small section of Material cut from a Nylon Windbreaker)

    Cut-out a PATCH of Repair Material to COVER the TEAR.
    Coat the Rubber over the TEAR with a thin coat of LIQUID Electrical Tape.
    Be prepared to work the next steps QUICKLY!!!

    >> Quickly apply the Patch with TWEEZERS and "Iron-Out" any Air Bubble or wrinkle with a BIC Ball Point Pen. (Using the Cap to Iron and the Butt Blunt End to smooth.)

    Smooth-out Patch.
    You don't get much time to do this.
    The Liquid Electrical Tape cures very quickly.

    Once Dry:
    Apply 2nd Coat of Liquid Electrical Tape over the whole patch.
    When 1st side is dry ... repeat process on other side of Rubber ...


    BUT, ... Don't Stick Tape on the Repair ...
    Just Smooth the Diaphragm Rubber Out.

    November 23, 2009
    "The RickCoMatic Patch" ©

    "If I can't fix it. ... it ain't broke."
    --- Will Rogers
     
    RickCoMatic, Dec 16, 2012
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  8. swe-eet

    swe-eet Member

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    Duct tape fixes everything same thing rick said but with the covering crack or holes. ..reason I say this it I'm redoing my carbs now and found duct tape over the whole thing and best honest it ran good but leaked gas. ....... I probably should of duct taped the bowls....
     
    swe-eet, Dec 16, 2012
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  9. OzRoadbandit

    OzRoadbandit Member

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    nice work there Rick. Good to see I could probably salvage them.
    I might pass on the duct tape though sweet .... cant get any to match the color of the bike....
     
    OzRoadbandit, Dec 17, 2012
    #9
  10. RickCoMatic

    RickCoMatic Well-Known Member

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    :::: Another good "Patch Material" is a Repair Patch cut from the palm of a Nitrile Glove ::::

    You should stock-up next time you go to the Doctors office!!!
     
    RickCoMatic, Dec 17, 2012
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  11. mrcarb

    mrcarb Member

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    The JBM diaphrams look like the best way to go. I hope you try them and post your results.
     
    mrcarb, Dec 17, 2012
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