2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 242Get this manual
REAR AXLE AND REAR AXLE HUB EBS00393
REMOVING THE REAR AXLE 1Place the machine on level surface2Remove: bolts 3Loosen: nut NOTE: Apply the brake pedal so that the rear axle does not turn, when loosening the nut Use the PTT wrench 46 or axle nut wrench (46 mm) 2_