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Discussion Starter #1
In need of some help: I only have spark on rear cylinder , wasted $180 on a coil , wires are good plugs are good, HELP! 2007 Road King custom (96")
 

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Mississippi Cajun
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23,968 Posts
Model? Year?
 

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Was the bike firing on one cylinder before you replaced the coil? Also, are you using an aftermarket ECM or fuel controller?
 

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Retired citizen
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21,780 Posts
How is spark being checked ?
The ECM needs to detect compression before it will trigger the coils correctly. Laying the plug on the head doesn't work. Need plugs screwed into the heads and a spark tester placed in series with the plugs.
 

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Do a compression test to make sure you are getting some, you could have a stuck valve or to tight of valve lash on that cylinder.
 
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