Battery charge go down - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 02-06-2008, 03:37 AM Thread Starter
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Exclamation Battery charge go down

Today I put a new Yuasa Battery full charge (12.5VDC), started the engine and 5 minutes later I verified the volts, for my surprise the volts were falling down little by little so I accelerated to increase charge to the battery but at 3000RPM transmits 12.86VDC at the battery
4000RPM --------- 13.10VDC
1500RPM --------- charge go down.
Somebody Know if this is normal or I get stator or R/R problems, also How many AC volts go out from the 3 yellows wires startor ?
Exists any test for that?......I would be grateful for some help

1989 Vulcan 750
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post #2 of 7 (permalink) Old 02-06-2008, 05:55 AM
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At lower RPM's, the bike is mostly running off the battery, as the stator doesn't really start charging until about 1800+ RPM's.

The voltage from the yellow wires (checking each wire as positive and ground as negative) should be 50+ volts AC.
And .3-.5 ohms checking between each of the stator wires to the others (1-2, 2-3, 3-1)

As long as you are showing increased volts as the RPM's go up, it's probably not the stator. But it should be a little higher at the 4000 range.
Are you sure you have clean and tight connections at the battery?


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post #3 of 7 (permalink) Old 02-06-2008, 04:04 PM Thread Starter
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connections clean and tight

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post #4 of 7 (permalink) Old 02-06-2008, 08:15 PM
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Quote:
Originally Posted by hyperbuzzin View Post
At lower RPM's, the bike is mostly running off the battery, as the stator doesn't really start charging until about 1800+ RPM's.

The voltage from the yellow wires (checking each wire as positive and ground as negative) should be 50+ volts AC.
And .3-.5 ohms checking between each of the stator wires to the others (1-2, 2-3, 3-1)

As long as you are showing increased volts as the RPM's go up, it's probably not the stator. But it should be a little higher at the 4000 range.
Are you sure you have clean and tight connections at the battery?
Also check between each yellow wire and ground, should be infinite. Battery voltage at 4K should be higher, something is amiss.

Jon

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vn750.com Member # 828

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post #5 of 7 (permalink) Old 02-07-2008, 09:50 PM Thread Starter
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Thanks fellows, I will check these tomorrow

1989 Vulcan 750
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post #6 of 7 (permalink) Old 02-08-2008, 10:05 AM
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Check your battery ground wire @ the frame--make sure it didn't loosen or that there is no corrosion under the connection

Rckmtn
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post #7 of 7 (permalink) Old 02-08-2008, 03:38 PM Thread Starter
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Good point rckmtn
I will check it

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