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    Jakebrake303's Avatar
    Jakebrake303 Posts: 1, Reputation: 1
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    #1

    Jul 24, 2015, 07:02 PM
    Fouling plugs while running
    97 Harley Davidson 1340 fouling plugs while running
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jul 25, 2015, 05:16 AM
    Are the plugs the right brand and heat range for your Harley? Also, check the plug gap. Try to read the plugs; i.e. is the fouling caused by oil, incorrect carburation, metallic oxides, etc. Next, I would check the engine's timing. If nothing is funky, you may need "hotter" running plugs. If the plugs are fouling due to oil, the engine likely needs to be rebuilt.
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