Quote:
Originally Posted by scott12544
what about the charging system. the 6v output will never keep the 12v battery charged. you would have to put it on a charger every night.
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The peak voltage output of the alternator is higher than 6V, but the battery acts as a regulator (load) to keep this lower. That's why you aren't supposed to run a bike like this without a battery (even if the ignition worked without it), it is designed to use the battery as a regulator.
Since engine is providing the same wattage @ 12V, doubling the voltage means current will be 1/2 the amount on 6V. (Because Power = Volts X Current). This is nice for a number of reasons, including lowering heat loss due to high current.
The newer rectifiers have a number of advantages, including lower heat, lower electrical noise, and higher voltage/current ratings.
I would recommend, if possible, including a 12V regulator in the circuit. It's not too likely to overcharge, but it's nice to reduce the odds of over driving the battery.