Yamaha YZ450FX 2019 Owner's Service Manual page 199

INSTALLING THE OIL SEAL....................................................................5-65
ASSEMBLING THE CRANKCASE ...........................................................5-65
CRANKSHAFT ASSEMBLY AND BALANCER SHAFT ................................5-67
REMOVING THE BALANCER SHAFT .....................................................5-68
REMOVING THE CRANKSHAFT ASSEMBLY ........................................5-68
CHECKING THE CRANKSHAFT ASSEMBLY .........................................5-68
INSTALLING THE CRANKSHAFT ASSEMBLY .......................................5-69
TRANSMISSION.............................................................................................5-70
REMOVING THE TRANSMISSION..........................................................5-71
CHECKING THE SHIFT FORKS ..............................................................5-71
CHECKING THE SHIFT DRUM ASSEMBLY ...........................................5-71
CHECKING THE TRANSMISSION ..........................................................5-72
INSTALLING THE TRANSMISSION ........................................................5-72