Question about Harley Davidson Harley-Davidson Motorcycle Desktop Telephone

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1988 sportster 1200-

The plug wire came off the rear cylinder about 1/4 mile from the house and when i reattached the bike ran rough- sounds like it;s missing, and wants to stall in 1st gear- plugs seem ok - changed them and did no good- nothing else seem to have come off or be loose - any suggenstion of what to look at .

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Try swapping out the wires. just grab two wires off the old lady's car and give it a spin, if all is well put her wires back and buy you a new set. could be the coil tunneling. ohm meter may or may not show up a problem. stock dual fire coil should run 3 to 5 ohms. on the primary. if you have a single fire set up with two coils you could have damaged the electronics if you have them and the power transistor that drives the coil is shot.

Posted on Aug 14, 2008

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I have a 2003 Harley Davidson 1200 sportster,


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Hi Anonymous, and the usual suspects are:
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1 Answer

The spark plug is only firing on the rear cylinder, I have replaced both plugs, both plug wires, and coil. all parts came from HD dealership and all parts are OEM replacement parts and still only fires on...


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1 Answer

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1 Answer

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Sounds like an ignition problem. Probably a fowled or damaged spark plug or lose or damaged spark plug lead. Try new spark plugs, I only recommend NGK and you may need to fit hotter plugs for cold weather riding. Plugs are cheap and thats the best place to start. 

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