Question about 1981 Honda GL 1100 Innerstate Gold Wing

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Jump start bike, at full throttle volt meter reads 12 at idle not charging

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  • manndebbie May 13, 2009

    i charged the battery road bike today, at start up read 14, 20 min

    into the ride drop down to 11 could it be the voltage regulater

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  • Honda Master
  • 3,433 Answers

The lower the voltage the higher the amperage. At twlve volts the charging sytem should be pooring the coals to the battery. Bttery sounds more like the culprit. If battery charges up corectly, the voltage will slowly rise to 14,.2 after startup. Have battery charged and load testest out of vehicle (bike) As battery goes bad the charging system works harder and speeds up battery quietus( death)

Posted on May 10, 2009

  • Ned C Cook
    Ned C Cook May 13, 2009

    Yes, it could be the voltage regulator. if you have an amp meter, connect it between the negative cable and the negative bat post to check amperage output of alternator. Do not run bike but for a few seconds with cable disconnected. you may also want to chk the battery specific gravity with a hydrometer.. One of those pencil hydromrters will work fine . good luck. you can also chk to see if there is adrain on the battery with the meter by putting it between the posirive post and cable clamp. VR are usually internal on alyteators and external on generators. What happens when you turn on the lights with it running? If the alternator is taking the load you hear the motor pull dow slightly. ,meaning battery is not helping. If engine holds steady than the battery is good.d the alternator is compensating for what is taken from the battery.I am inclined to say it's the battery but would still confirm with load and specific gravity reading. drain. If you use your kill switc to shut down engine, make sure you return it to the run position once the enginr stops and you've taken the keys out. We'll get it.good luck

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First, take your battery somewhere and have it load tested. Fat Boys are tough on batteries as the battery sits in the "horseshoe" oil tank and is subjected to high temperatures due to the hot oil in the tank. Battery life is typically two years although I've seen some go longer and some not last that long. Have the battery tested before you start spending money.

To check the stator, you unplug the regulator at the engine case. Down inside the plug you'll see some electrical connectors. Connect a DVOM (digital volt ohm meter) to these connectors (one lead to eac pin) and put the meter in the 50 volt or higher range AC voltage. This is important that your meter be set to measure AC voltage because at this point, the voltage is indeed an Alternating Current voltage coming out of your alternator. Start the engine and bring it to a high idle. You should be reading over 20 volts AC. The book says that you should read 12-18 volts per 1000 engine RPM. If your engine is turning 2000 rpm, your meter should read 24-36 volts AC.

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I don't know where you're located but $260 seems quite high for a voltage regulator.

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