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Buell Forum » 1125R Superbike Board » Stator/Voltage Regulator/Charging System subforum » Voltage drop « Previous Next »

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Aussie_bueller
Posted on Sunday, October 30, 2016 - 11:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hi Guys
On start up the bike has 15.4 volts ,once the fans starts it slowly drops down to around 12.4. I have the rota mod ,rewound stator ,rick voltage reg.. Does anyone have any ideas ?
Waiting for new battery
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Joe7bros
Posted on Monday, October 31, 2016 - 12:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Battery, that would be my guess; how old is it?
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Rpm4x4
Posted on Monday, October 31, 2016 - 10:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I agree. Verify that the battery is good first
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Terrys1980
Posted on Tuesday, November 01, 2016 - 09:37 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

15.4vdc is too high. Has it always been like that? That could be the reason for the bad battery.
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Aussie_bueller
Posted on Wednesday, November 16, 2016 - 04:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Guys
I bought a new battery and the start up was around 14.5 volts, it dropped down to around 13.6 and when the fans started it slowly dropped down to 12.6 (again). So I tried the original voltage reg and on start up 13.4 and when the fans start it still stays around 13.4.I will go for a good ride 2hrs and will keep a look out for voltage change.
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