2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 501Get this manual
REAR DRIVING MECHANISM Install he outer oil seal (75 mm .0 into the gea case until it is flush with the gear case outer surface, using he same tool
Clean the th reads of Ihe pin ion gear shaft horoughlyInstall the pin io jo int nto the inio qea shaft, being careful not to damage the oi seal lipsApply locking age nt to he hreads of Ihe prmon joint nut and screw it in by hand as far as it go esHold the pinion joi nt with the special tool and
tig hten the jo int nul
Pini on holder
07SM BHM 1Q200 TORQUE108 Nm (11.0 kgf 'm80 IbUt)
RING GEAR CLEARANCE INSPECTION
Inst all the ing gea wit the shim in to the case