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Post by bobclark on Apr 28, 2023 19:18:21 GMT -5
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Post by bobclark on Apr 28, 2023 19:38:22 GMT -5
Hi, I found this Forum whilst browing the web looking for a solution to a problem, and hope that people here won't mind being asked for any information you can provide. I am rebuilding a 1930s 175cc two-stroke, fitted with a crankshaft magneto, 6v lighting coils and a battery. The original regulation-rectification setup was a primitive half-wave arrangement with a selenium rectifier and a set of wire-wound resistances. It did not work that well when new, and replacement parts are totally unobtainable. Following advice elsewhere I have got myself the 5-wire full-wave reg-rec shown in the photo. I have also had the lighting coils remade so that they can connect up to the pink and yellow wires from the reg-rec. I understand that the green and red wires go to the battery. With ignition being handled by the crankshaft magneto, the electrical system is only for the lights and horn. What I don't understand, and can't get answered anywhere else so far, is what to do with the black wire. I have been told that it senses that the lighting system is working and drawing power from the battery and tells the reg-rec to charge the battery, but unless I have misunderstood it would seem that when the lights are not in use and there is no electrical load for the black wire to detect - daytime riding - the battery does not receive charge. I obviously want a system where the battery is kept charged regardless of whether the lights are on or off, or the battery will quite quickly fail. How can I wire a reg-rec like the one I have got so that the battery is charged whenever it needs it?
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