2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 342Get this manual

REAR DRIVING MECHANISM Be careful that Unstake the pinion bearing lock nut with drill or metal particles do grindernot enter the bearing and the threads of the case are not damaged
LOCK NUT

Unstake

Remove the lock nut using the special toolTOOL: Lock nut wrench, 30 64 mm 07916-MB00002

LOCK NUT WRENCH

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives