2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 246Get this manual
REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT
REMOVING THE REAR AXLE 1.Remove: Rear axle (with dust seal) O-ring
CAUTION:
Never directly tap the axle end with hammer, since this will result in damage to the axle thread and splineAttach suitable socket on the axle end and tap it with soft hammerPull out the rear axle to the right
DISASSEMBLING THE FINAL DRIVE GEAR 1.Remove: Bearing retainer (final drive pinion gear) NOTE: Use bearing retainer wrench 1Bearing retainer wrench: PNYM-04050, 90890-04050