2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 283Get this manual
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BATTERYCHARGING SYSTEM
FaUlty regulatorrectifier
Correct
Check the alternator charging coil (page 16-6)STANDARD: 0.20.6 (2Q"C 68F)
Shorted wire harness Fau