2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 238Get this manual
REAR WHEEL BRAKESUSPENSION Apply grease to new dust seal lips and install them into the bearing holder until they are flush with the holder end surfaces
Install the bearing holder, washer, drive chain adjuster, nuts and bolts but do not tighten the bolts yetConnect the brake breather hose