2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 251Get this manual
REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT
FINAL DRIVE ROLLER BEARING REMOVAL AND REASSEMBLY 1.Remove: Roller bearing (ring gear) Use suitable press tool and an appropriate support for the main housingOil seal 3
2.Remove: Roller bearing (final drive pinion gear) 1