Wrench hit it right, my bike did the same thing with new battery it would go for a while and things would fade, then the tac would go coo-coo and start misfiring and die. I would wait several minutes and it would run a little longer. So installed new after market reg/rec and it would be fine for days, then it would happen again and repeat. Turned outI had a bad harness, replaced that and never came back.
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