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

    May 25, 2009, 01:19 AM
    Electrical system on a 1999 Sportster 1200c
    Just recently my sportster just quits when crusing down the road. I don't travel far less then 5 miles and it quits. Fuel is fine , new battery. I t seems to aheat related problem and I am supecting a over heated coil but is there a capacitor control module under the gas tank anyone. I haven't had to work on it and no manuals yet as I just bought this bike and I am here in Singapore with limited shops ( 1 ) factory store. But being a aircraft electrican I don't trust a shop to troubledshoot very well. I am ordering manuals but looking for a quick answer.

    After about 20 minutes the bike will start that is why I think it is a heat related problem on the electrical system.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    May 25, 2009, 05:28 AM

    . Replace the Ignition Control Module (ICM) and coil. The ICM is most likely the culprit, but I would replace both.

    . Remove and fully charge the battery on a motorcycle battery charger. This is especially necessary on new motorcycle batteries. I use an "ampere damper," which attaches to my regular battery charger.

    . Clean battery terminals and cable connections. Since you live in Singapore, with the high humidity, be sure to apply dielectric grease to the battery connections.

    . Check the charging system.
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