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Buell Motorcycle Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through June 14, 2009 » Battery Voltage: Quick Question « Previous Next »

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Johnboy777
Posted on Friday, June 05, 2009 - 04:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
I just got back from a three-hour cruise and ck'd my voltage it read 12.99v without load and 12.40v under load (both headlights and 55A fog lights on)

Any thoughts? is this about right?

The reason I ask, is when I went to leave for home I was talking with someone and had the ign. on (headlights/fog lights, too) for about 5 to 10 min. and it felt like it ALMOST didn't want to crank over.

Thanks.

...
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Etennuly
Posted on Friday, June 05, 2009 - 04:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
That is fine. The book asks for 12.6V to test. These batteries are small and don't usually have a lot of reserve power.
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Mnrider
Posted on Friday, June 05, 2009 - 05:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
Should be about 14V with the engine running.
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Johnboy777
Posted on Friday, June 05, 2009 - 06:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
""Should be about 14V with the engine running.""

Thanks, Mnrider, Good information.

I'll test it first thing in the AM with the engine running.

.
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Cota247
Posted on Sunday, June 07, 2009 - 01:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
I have a problem on my 2007 with the battery not recharging on the alternator.
The battery is on a tender thru the off season. And we could not find anything draining on the battery.
Has anyone had a problem with the alternator going out?
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Ronmold
Posted on Sunday, June 07, 2009 - 02:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
"77" connector, check that first, then the voltage regulator, and then the stator. That's all there is to the charging system.
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Tootal
Posted on Sunday, June 07, 2009 - 03:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
If you find fault with the regulator don't just replace it, check the stator first. A bad stator will screw up a new regulator and then you get to buy it again. Don't ask me how I know!!
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