2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 299Get this manual
REAR DRIVING MECHANISM PINION GEAR REMOVAL Remove the oil sealOIL SEAL
Be careful that metal particles do not en ter the bearing and the threads of the case are no damaged
Unstake the pinion bearing lock nut with drill or grinder
Unstake
Remove the lock nut using the special toolTOOL: Lock nut wrench, 30 64 mm 07916-MB00002
LOCKNUT WRENCH