1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 117Get this manual
j;RECOIL STARTER ALTERNATOR CAM CHAIN TENSIONER
Remove the bolt attaching the starter driven gear set plate and the plateRemove the starter driven gear and needle bearing
NEUTRAL SWITCH WIRE
LEFT CRANKCASE COVER SPACER REMOVAL
Remove the alternator (page 96)Disconnect the neutral switch wire from the switch