1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 148Get this manual
CRANKCASECRANKSHAFTTRANSMISSION
CRANKCASE SEPARATION
NOTE The appropriate components must be removed before separating the crankcase (page 10-1)
Remove the following:cam chain- cam chain tensioner
Temporarily install the gearshift drum bearing stopper plates, dowel pins, collars and guide plate to prevent the bearing from falling out while disassmbling and assembling the transmission