1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 334Get this manual
STARTER SYSTEM
ASSEMBLY
(1) REAR COVER
(5) MOTOR CASE
(6) ARMATURE (4) BRUSH HOLDER
(9) FRONT COVER
Install the brushes in the brush holders as shown