Battery voltage

Discussion in 'Touring Models' started by 01 rk, Nov 7, 2011.

  1. 01 rk

    01 rk Active Member

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    My battery reads 12.25 volts engine off 12.5 at idle, goes to 13.5 when reved up.
    Is this what it should be?
    I thought 14 volts when reved was correct.
     
  2. glider

    glider Veteran Member

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    That's about where the voltage should be.
     
  3. Jack Klarich

    Jack Klarich Guest

    Harley Davidson Community A fully charged battery should read 12.75 volts
     
  4. glider

    glider Veteran Member

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    If you are using the HD gauge, they aren't extremely accurate. Best to verify the voltage with a meter at the battery.
     
  5. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    As Glider said, you should use a more accurate meter to actually read what the charging system is putting out. But if those are accurate readings, then it sounds like the charging system is getting a bit fatigued. When it is time, you might want to consider upgrading to the high output rotor that will give you significantly better performance out of the alternator.

    I would wait until you have a stator failure or VR failure, then upgrade the whole system with the HO rotor, stator and VR.

    TQ
     
  6. 01 rk

    01 rk Active Member

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    As Glider suggest I used a volt meter at the battery, there's no gauge on the RK.
    With 88k on it I suspect, as TQ says, the charging system is getting tired.
    Never had one fail.
     
  7. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    WOW. Count yourself lucky, Brother. I have had around half a dozen failures on this bike, and about half that many on the little one (Dyna).

    TQ
     
  8. opaka lips

    opaka lips Member

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    Also- another thing to ponder: A cheap handheld voltmeter may not be 100% accurate.
     
  9. 01 rk

    01 rk Active Member

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    I wouldn't call a Fluke a cheap hand held meter, it was very expensive to purchase. I believe it gives accurate readings.
     
    Last edited by a moderator: Nov 8, 2011
  10. glider

    glider Veteran Member

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    I agree but we didn't know what meter you were using:D