81 CB 750C No Spark

Discussion in 'Motorcycle Technical Discussion' started by lwatters38, Jan 17, 2007.

  1. lwatters38

    lwatters38 Guest

    I have an 81 cb 750c dohc and i am not getting any spark to the plugs,
    could anyone tell me how to find out why i am not getting spark to the
    plugs not sure how to troubleshoot...
    Thanks,Larry
     
    lwatters38, Jan 17, 2007
    #1
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  2. lwatters38

    fweddybear Guest

    I have an 81 cb 750c dohc and i am not getting any spark to the plugs,
    There could be a few reasons why you aren't getting spark to the spark
    plugs....one could be the ignition modules are shot....look under the seat
    above the battery, you will see a pair of ignition modules... inspect them
    to see that they haven't "melted" on the side where the wires look like
    the've been coated...If it looks funky, replace them. I had that problem on
    my bike (among a boatload of other problems). It might also be whats wrong
    with yours...
    Other reasons could be the spark unit is shot....could have broken or
    shorted high tension wires, a faulty A.C. generator, faulty ignition switch,
    or faulty puilser generator... even bad or fouled spark plugs (which I
    highly doubt).

    Good Luck... let us know how you make out...

    Fwed
     
    fweddybear, Jan 17, 2007
    #2
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  3. lwatters38

    MotoErik Guest

    Larry,

    I used to have a '91 CB750 (Nighthawk)- although it is a different bike
    than yours in many different ways, I know that there were many
    knowledgeable people over in the Yahoo group. You can find it at
    http://autos.groups.yahoo.com/group/cb-750/

    Erik
     
    MotoErik, Jan 21, 2007
    #3
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