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Idle Question

Discussion in 'XJ Technical Chat' started by ghost_rider1967, Aug 16, 2009.

  1. ghost_rider1967

    ghost_rider1967 Member

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    Today while riding around My bike started idling really high.. It sounds like the choke is wide open but it was closed. So i hot-tail it back to the house and have a look.. It start to idle normal after I shut it off and then back on. I notice in the middle of the carb body.. that there is a thumb screw.. what is that for. I still have not found my service manual locally yet..

    If some one could tell me what that is for and any possible clues as to why it Idles so high after it warms up would be great..

    The bike is an 82 Xj750..
    thanks
     
    ghost_rider1967, Aug 16, 2009
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  2. razz1969

    razz1969 Active Member

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    That thumb screw is how you adjust your idle. But before you start twiddling with it look in to your float level, slide stikage, and most of all vacuum leaks. If not you will be chasing the idle all over the place.
     
    razz1969, Aug 16, 2009
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  3. Wyldman

    Wyldman Member

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    As I've said several times recently, let it heat up completely. Once it starts "racing" adujust the screw back to the 1050 range. Use gloves, pliers or both as the engine will be hot. AGAIN I don't know who gave me the information initially but it worked the FIRST time and I've had NO issues since.
     
    Wyldman, Aug 16, 2009
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  4. XJ700VET

    XJ700VET Member

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    You can quickly check for a vacuum leak by spraying a flamable break cleaner around each boot, listening for a change in the rpm's. If they start to get faster when spraying around a certian boot then, you might have found your leak. Don't use spray carb cleaner!! It does bad things to rubber!

    Hope that helps
    Ken
     
    XJ700VET, Aug 16, 2009
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  5. skeeter

    skeeter Member

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    could be throttle cable mis-routed or sticking also.
     
    skeeter, Aug 16, 2009
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  6. ghost_rider1967

    ghost_rider1967 Member

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    Thans for the suggestions.. will try it later today and post back...
     
    ghost_rider1967, Aug 16, 2009
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  7. ghost_rider1967

    ghost_rider1967 Member

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    Thans for the suggestions.. will try it later today and post back...
     
    ghost_rider1967, Aug 16, 2009
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  8. ghost_rider1967

    ghost_rider1967 Member

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    One more question is that clockwise or counter clockwise from the back of the bike
     
    ghost_rider1967, Aug 16, 2009
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  9. Polock

    Polock Well-Known Member

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    counter clockwise = slower
    clockwise = faster
     
    Polock, Aug 16, 2009
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  10. ghost_rider1967

    ghost_rider1967 Member

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    Thx for the tip.. worked like a charm...
     
    ghost_rider1967, Aug 16, 2009
    #10

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