2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 210Get this manual
FRONT AND REAR WHEELS
INSTALLING THE FRONT WHEEL HUB BEARINGS 1Install: bearings NOTE: Face the oil seal side of the bearing inward
INSTALLING THE FRONT BRAKE DISCS 1Install: brake discs NOTE: Install the brake disc with its spot-faced side facing the bolt heads