1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 129Get this manual

SUBTRANSMISSION
Remove the map ring, then remove the high speed gearRemove the reverse stopper shaft and sub shift drumCheck the gears lor wear or damage
SUB SHI FT DRUM

SNAP RING

I NSPECTION
Check the reverse stopper shaft and neutral indicator oil seals for wear or damageReplace if necessary

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