81 Yamaha XS 850 discussion forum:

RE: battery losing power- i am new to bikes

RE: battery losing power- i am new to bikes

peace G said 2008-07-12 17:58

try unplug headlight relay then start bike and test charge, there is an inline diode for the head light if goes out it sends charge back thru relay into rectifier causing field to break at stator, had same problem replaced everything to find out 75cent diode was it good luck

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