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Discussion Starter #1
I have a 05 660. I went riding this weekend, and about halfway through the day, the battery starting making a high pitch noise. Along with that, a stench arose and my buddy said that was the battery. The battery is only a few months old. Are those symptoms of overcharging?
 

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Did you look at it at the end of the ride to see boiling or leaking acid/gases?
I haven't heard of this happening on a 660, but excessive volts/amps can cause a lot of heat.
 

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Discussion Starter #3
The way I diagnosed the noise was the battery was by pressing on the top. When I did it hushed until I released. I did not see any liquids or gasses escaping, but it did create an odor. At one point in our time there I stopped at the bike wash station and flooded the battery compartment with water. It quit for a few minutes after. (That probably wasn't the wisest idea.) I will look up how to test the voltage regulator and test it.
 

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I suggest a factory service manual for all the numbers.
 

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Hmmm....if you are smelling something from the battery, hydrogen is rather explosive along with a fire hazard.
 

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Discussion Starter #6
I figured the smell was hydrogen. Anytime we would stop and it was wining, I would pull the seat to help it vent.
 

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Check your voltage regulator seems to be over charging.
 

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X2
 

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Discussion Starter #9
Today I decided to break out the Voltmeter and remove the regulator. I have confirmed that the black on the plug goes to battery negative, and the red wire on the plug goes to the positive. I put the voltmeter to diode test, put the meter negative where the negative wire (off the harness) would go and get open circuits. If I put the meter positive to the regulator I get about .510. The same occurs with the positive side. Does this mean the regulator is bad? The last time I tested one I would get open circuit on one pin (this was a different regulator on a different bike).
 

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The output voltage of the regulator should be 14 volts around 4-5000 rpm's
 
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