2006 Honda TRX680 Rincon Factory Service Manual, Page 346Get this manual
DRIVETRAIN SYSTEM 2nd3rd SHIFT CLUTCH AND MAINSHAFT DISASSEMBLY Remove the countershaft (2nd3rd shift clutch) and mainshaft (page 13-7)Remove the end washers with screwdriver and disassemble the countershaft: C1 gear thrust washer C2 gear bearing lock washer C3gear bearing thrust washer 2nd3rd shift clutch assembly O-rings C3GEAR C2 GEAR C1 GEAR