1986-1987 Honda TRX350 FourTrax 4X4, 1987-1989 TRX350D Foreman 4X4 Service Manual, Page 257Get this manual
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BATTERY CHARGING SYSTEM
FUSE (FOURTRAXj
(1) REGULATOR RECTIFIER
(1) IGNITION SWITCH
( 5) ALTERNATOR CHARGING COIL