1986-1987 Honda TRX350 FourTrax 4X4, 1987-1989 TRX350D Foreman 4X4 Service Manual, Page 143Get this manual
CRANKCASECRANKSHAFTTRANSMISSION Remove the mainshaft and countershaft as an assembly
OISASSEMBL Y
Disassemble the mainshaft and countershaft gears
Remove the snap ringwasher and M4 gear from the mainshaft
(2) WASHER
(3) M4 GEAR
INSPECTION
Check the shift fork and shaft for wear or damageMeasure the IDof the shift fork
SERVICE LIMIT: 13.04 mm (0.513 in)