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  1. #21
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    Quote Originally Posted by JBinNC View Post
    Generators are a little more difficult than alternator systems to daignose, without the tools for generator testing.
    However, here's a quick and dirty way to test the generator itself on the bike:

    You need a fully charged battery, a decent voltmeter, and two jumper leads. The battery should be hooked up on the bike as normal, or on a batteryless bike, battery negative must be hooked to the generator body or motor.
    Disconnect the regulator, this test is about the generator only. Also, if there's a generator lamp lead, disconnect it from the generator as well.
    Connect the voltmeter across the battery, and one test lead to each battery post. Voltmeter should be reading battery voltage.
    Start the motor and set it to run at 2500-3000 rpm.
    Connect the positive battery test lead to the A terminal and the negative lead to the F terminal, just for a couple of seconds. This full fields the generator, so only a couple of seconds! Voltmeter should rise to at least 16V, for a 12V system, or 7.5V for a six volt system.
    If it does not, the generator is bad. If it does reach the voltage, the generator may still have a couple of opens in the armature, but is still charging.
    If your generator passes this test, change the regulator. (And be sure the regulator, whether mechanical or electronic, is grounded. )
    If the generator fails this test, clean the commutator and brushes, and be sure the brushes are free to move in their holders and test again.
    Jim
    I’ll try this but this sounds like work a professional should be doing. This is my first motorcycle and I have a basic understand of mechanics but I don’t know the specifics like armature, commutator and brushes.

    My regulator has a red, brown, and green wire hooked up as shown above so I don’t know which one is ground, that’s just how I was told to wire it.

    I’m at the point now where I just want to ride so if I have to buy a cycle electric generator and regulator combo then so be it.

  2. #22
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    Since you mentioned Cycle Electric, maybe this will help:

    Diagnosing charging system problems part 2
    --Generators--
    http://www.cycleelectricinc.com/Test...Generators.htm

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