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Runs Great then shuts down

Discussion in 'XJ Technical Chat' started by rwoods, Apr 17, 2016.

  1. rwoods

    rwoods New Member

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    Been fight this issue for some time. My bike runs great when it wants to some days I can ride all day and other maybe 5 minutes then it shuts down like its out of gas wait for about 30 minutes and it fires right back up as if it was cold. Looking for any suggestions on what it may be carbs, coils plugs?
     
    rwoods, Apr 17, 2016
    #1
  2. Stumplifter

    Stumplifter Well-Known Member

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    what bike?
    Carbs rebuilt recently?
     
    Stumplifter, Apr 17, 2016
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  3. specialk

    specialk Active Member

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    Could be that the gas caps not venting properly causing fuel not to flow. Next time it happens open the gas cap and see if the issue is resolved.
     
    specialk, Apr 17, 2016
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  4. k-moe

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

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    Valve clearances?
     
    k-moe, Apr 17, 2016
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  5. rocs82650

    rocs82650 Well-Known Member

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    Fuse box?

    Gary H.
     
    rocs82650, Apr 17, 2016
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  6. Jetfixer

    Jetfixer Well-Known Member

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    Check your fuel line make sure it is not pinched..ie it may flow just enough fuel to fill fuel bowls after sitting but not enough under load.. Ask me how I know this:oops: went for a ride get 3 miles from home bike dies...been adjusting carbs checking everything , get it started after sitting for 10 minutes barely make it to home and dies again. In my haste lift tank up and my fuel line is bent up under tank.. Straighten line up and runs with no issue...;)
     
    Jetfixer, Apr 18, 2016
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  7. XJ550H

    XJ550H Well-Known Member Premium Member

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    welcome on your first post
    first tell us what bike and what you have done to the bike.

    have you tried turning petcock to prime to see if it will start after 10 seconds?
    how to rebuild gas cap link if you need it
    Your Gas Cap and You

    make sure there is no air in your fuel line are you using a filter?

    could also be ignition related have you omhed out the ignition system yet?
    you can test them when bike stops running at side of road to see if it is a heat related issue
    spark plug caps could be loose bad resistor in cap ,failing pickups ect
    test for a base line and record it
     
    XJ550H, Apr 18, 2016
    #7
  8. XJ550H

    XJ550H Well-Known Member Premium Member

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    here is your welcome gift Some reading for you
    some reading for you

    The Information Overload Hour

    The Ultimate Relay, Switch, Sensor, and Diodes Guide

    IN THE CHURCH OF CLEAN

    THE SECRET LIFE OF CARBURETORS

    Something New, Something Naked

    TALKIN' TECH: Various thoughts on various issues

    AIRHEAD VALVE ADJUSTMENT with Pics

    AIRHEAD VALVE ADJUSTMENT Part 2: The Tool vs. ZipTie -w/pics

    Choosing Oil for a Wet Clutch Motorcycle


    SAFETY ALERT Drum rear brake bike owners please take a look


    our forum supporting vendor plenty of parts and advice Chacal

    XJ4Ever - Supporting Vendor

    his web site
    www.xj4ever.com
     
    XJ550H, Apr 18, 2016
    #8
    ColoradoDan likes this.
  9. XJ550H

    XJ550H Well-Known Member Premium Member

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    could also be the vacuum hose failing you can change that if your problem continues after cleaning gas cap
    you should do both anyways if you do not know when it was done last.

    4 mm VACUUM HOSE not fuel line
     
    XJ550H, Apr 18, 2016
    #9
  10. ColoradoDan

    ColoradoDan Active Member

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    Good list! Make sure to include these:
    Clean Your Own Carb's - The Whole 9 Yards - by: Rick Massey

    Your Carbs NEED to go CLUNK!!!


    Hey rwoods, if you haven't performed a carb clean/overhaul, or a valve shim adjustment, then that's your first answer. Once those items are in good working order, then the problem diagnosis is a bit easier for others on here.
     
    ColoradoDan, Apr 18, 2016
    #10

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