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Old May 20, 2011 | 08:39 PM
  #1  
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1983 shovelhead misfireing in back cyl
 
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Old May 20, 2011 | 09:21 PM
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try changing to a hotter plug. if your plug is sooty black. also have your coil checked to make sure both leads are sending enough power to the plugs. they sometimes go bad on one side of the other. good luck an old biker in rhode island.
 
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Old Jun 1, 2011 | 08:32 AM
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Check for an intake leak as well. Pretty common cause for this type of issue, especially if you know you're getting spark and it does the same thing with new plugs...
 
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Old Jun 1, 2011 | 04:50 PM
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Plug wires .
 
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