On my old CBR, all the electric problems are with ground corrosion. And I have a steel frame. Aluminum frames are just as bad or worse. I ground my ground wire from the R/R (green/black wire on my bike) directly to the negative terminal of the battery. Mine also has a wire (red/white) from the R/R to the starter relay, so if the R/R doesn't have a good ground, it may not crank.
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