honda 1982 cm450 voltage regulator output

Discussion in 'Motorbike Technical Discussion' started by steve, Jan 27, 2008.

  1. steve

    steve Guest

    What should output on this be?I'm getting 14 volts.Will this blow out the
    steve, Jan 27, 2008
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  2. steve

    . Guest

    No, it will not blow the headlight out. A 12 volt battery will charge
    up to about 14.5 volts,
    and then after it sits for half an hour, the voltage will drop back to
    about 12.2 to 12.8 volts, depending on whether it's a flooded cell
    battery or a maintenance free type.

    Charging a flooded cell lead acid battery at more than 14.5 volts
    causes the plates to shed their lead and it falls to the bottom of the
    case, possibly shorting the plates.
    ., Jan 28, 2008
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  3. steve

    MadDogR75 Guest

    14 volts is fine.
    A fully charged lead acid battery should give 12.8-13.2 Volts.
    14 -16 is right for charging and won't harm the lights.
    MadDogR75, Feb 5, 2008
  4. 16 sounds a mite high, depending on the battery I guess.
    As others have suggested 14.5 is probably about the
    most I'd feel comfortable with on a lead-acid battery.
    Rob Kleinschmidt, Feb 5, 2008
  5. steve

    . Guest

    Maintenance free batteries use a slightly different electrochemistry,
    so voltage regulators on bikes that came with maintenance free
    batteries will stop charging at 15.5 to 16.0 volts.

    But that much voltage is not healthy for older style flooded cell lead
    acid batteries, it will cause the plates to shed lead particles.
    ., Feb 6, 2008
  6. steve


    Jun 24, 2022
    Likes Received:
    Hey y’all, I have a 1982 cm450e that I’m building..
    I think I blew the voltage regulator last night and I’m not sure why, I have a 12 volt battery.. I don’t have the best knowledge when it comes to wiring, any advice? Thanks!
    Bharmoncm450e, Jun 24, 2022
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