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Maxim 650 dies after 5 minutes

Discussion in 'XJ Technical Chat' started by littlebill31, Sep 14, 2011.

  1. littlebill31

    littlebill31 New Member

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    I've been tinkering with my friends '82 Maxim 650.
    I'm mainly a XS650 guy though.
    I got it running pretty good, but after about 5 minutes of running it dies and will not restart. Just cranks.
    If I let it sit for a couple hours it will fire right up.
    It's not flooding and it is charging.
    Any thoughts?
     
    littlebill31, Sep 14, 2011
    #1
  2. RudieDelRude

    RudieDelRude Member

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    what exactly did you check, and fix?
     
    RudieDelRude, Sep 14, 2011
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  3. doc2029

    doc2029 Member

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    Bad fuel might be the cause. May want to dump some dry gas (Heet) in there and add some fresh fuel. Or it could be over heating, sure it has enough oil in it? check the vacuum line as well, it could have been replaced with non-vacuum line and it is getting warm and collapsing in on its self.

    Are the valves in spec? Have they been checked?
     
    doc2029, Sep 14, 2011
    #3
  4. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    (Classic symptom of a tight valve or four; or a plugged gas cap vent.) Plus everything else Doc mentioned is also a possibility.
     
    bigfitz52, Sep 14, 2011
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  5. eman1974

    eman1974 Member

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    Not sure I can explain it, but I just had the same problem and it turned out to be a spark issue. Cleaned some corroded wires and replaced the spark plug caps and all is well. This was all done by the local stealer - as I was in their parking lot when I could not get the stupid thing started.

    I was having problems with the bike dieing after driving 5 mins down the road. It got more frequent up until it dies in the parking lto adn would not start.

    So unless they pulled a fast one on me...
     
    eman1974, Sep 16, 2011
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  6. dinoracer

    dinoracer Member

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    When this happens again. Pull a plug cap and put a plug into it. Place plug and cap against engine and turn over. If you have spark then its a fuel problem. If you don't have spark then it's an ignition problem.

    You will probably have to replace the pulse coils. They are located on the left side of the crank. When they get hot they quit working.
     
    dinoracer, Sep 18, 2011
    #6

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