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Post by naive on Oct 6, 2017 15:50:33 GMT -6
BMS 250CC "MACHOMAN" - I am replacing the voltage regulator because I am not getting enough voltage to charge the battery properly - 13.5 to 14 volts at the battery. I have checked the stator and am getting 50 volts or better at the output so I believe that the stator is good.
The regulator is 6 wire. One of the 3 outputs from the stator has a wire hooked to it that leads independently to the carburetor. Looking at the wiring diagrams it seems to run initially to something called a "liquid adding valve," as so identified on the diagrams. Anybody know what this is? It apparently runs completely from the raw stator power, i.e., AC current at around 50 volts.
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Post by ellpee on Oct 7, 2017 7:52:05 GMT -6
I *** THINK *** that's the enricher, which adds a bit more gas to the fuel flow thru the carb for a few minutes, until the engine is warmed up. Kind of the reverse of a choke; choke decreases amount of air, enricher increases amount of fuel. Didn't realize it got its power direct from the stator, but that would make electro-mechanical sense, don't want it heating up just from the ignition switch being on.
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Post by ellpee on Oct 9, 2017 7:17:51 GMT -6
Oh, a PS: if you haven't already bought your replacement regulator, seriously consider getting one from Oregon Motorcycle Parts. They build their own, and they are gorilla-grade, much better output that most you'll find on line, though somewhat more expensive. I had charging problems too, and the ultimate solution was one of their regulators -- zero problems with charging and running all accessories after that. (No, I'm not related or a shareholder, just a very satisfied customer.)
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Post by naive on Oct 18, 2017 0:01:23 GMT -6
Thanks - that was my thinking completely. I already erplaced my regulator with a $12 one from ebay. Seems to work fine for the moment, though far fewer cooling fins heat sink. I will watch it. Besides the low voltage another symptom of the old bad regulator was that the junction connector with the wiring had one of the three prongs melted through the plastic casing. Obviously an electrical problem somewhere.
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