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Regulator rectifier


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So, one of parts I had to buy to get this bike running was a regulator rectifier. I'm aware of the AC/dc outputs of it and what they supply. However I burn out light bulbs each time I use it. I put a meter on the headlight to see what I had there. It was 13.5v at idle and over 18v at high rpm. So to me it seems it's not regulating. Does that mean it's bad, or is there other causes? What could it be?

I also have a spare stator, but I rather not pull it unless I knew that it was the cause.

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  • 3 weeks later...

Ok, so I checked over every ground. I even ran a new one directly to the rr. I'm still having the same problem. I'm burning out bulbs faster than before.

Here's my point of confusion. The headlight is AC. The stator has a separate coil for this. Does that AC current pass through the rr? Or is that only dc? How can I be certain that it's the rr that's bad, not the stator?

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