Dead battery issue | Page 3 | GTAMotorcycle.com

Dead battery issue

does the bike have an alternator or a Stator and RR

Most cars put out 14+ volts, and have alternators that are capable of doing that at idle speeds. If you connect that to your bike, the regulator (R/R) on your bike is going to try to regulate it to what it thinks is the proper voltage, which might be exactly 14.0 volts. To regulate voltage, it shorts what it considers to be excess directly to ground. When the car sees this load, it increases its output to try to compensate. Meanwhile your R/R is trying DESPERATELY to regulate the voltage by keeping that short to ground active. The problem here is that the R/R is only rated for about 25 amps, the car's alternator is going to be putting out a LOT more than that.

Guess which system loses?

very nice blurp on the subject
 

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