2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 262Get this manual
SUB -TRANSMISSION GEARSHIFT LIN KAGE w asher out put shaft (w hile holding the driven gear) utput riven gear
OU TPUT SHA FT
Rem ov he ashers the shaft ends with screwd river and dis assemble he co untershah
INSPECTION
COUNTERSHAFT
Chec th gear dog and teeth for abnormal ear or
damageChec th gear shif ter fo smooth op erat io nChec th gea shifter groove, dogs and spli nes for ab normal ear da mage