Yamaha WR450FX Owner's Service Manual page 151

REMOVING THE CRANKCASE BEARING
Order
Transmission
Shift cam and shift fork
1 Oil seal
2 Bearing
CRANKCASE AND CRANKSHAFT
Part name
5-57
Q'ty Remarks
Refer to "TRANSMISSION, SHIFT CAM AND
SHIFT FORK" section.
Refer to "TRANSMISSION, SHIFT CAM AND
SHIFT FORK" section.
3
10 Refer to removal section.