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Discussion in 'XJ Technical Chat' started by codydenver, Jul 11, 2010.

  1. codydenver

    codydenver New Member

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    I just took the engine out of my 82 xj650 to replace the neutral switch. and all went well until... I tried to start it without the air box on and the thing starts going 8 and 9000 rpms without going down! I can't find anything mechanically wrong with it... the throttle cable slides and the lever sits down fine on the carbs... (which BTW I never touched the cards them selfs) Could it be electrical (electrical tach.)
     
    codydenver, Jul 11, 2010
    #1
  2. RickCoMatic

    RickCoMatic Well-Known Member

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    To make High-rpm's ... The THROTTLES MUST BE OPEN.

    Unhook the Throttle Cable
    Back-Off the Idle Adjust Rod
    Close the Individual Throttles by closing them at the Sync Screw.

    The Throttles are OPEN
    You cant make over 5000 rpms without Open Throttles.
     
    RickCoMatic, Jul 11, 2010
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  3. NigeW

    NigeW Member

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    Check your idle adjuster - these engines can go sky high with even a little bit of adjustment/movement - really sensitive!

    Nige
     
    NigeW, Jul 13, 2010
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  4. wicked_maxim

    wicked_maxim New Member

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    When you re-set your idle, make sure it's completely reassembled as far as the breathers and such go. My xj650 won't hardly even run without the breathers. Put them in, runs like a top. Just a pointer.
     
    wicked_maxim, Jul 17, 2010
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