Yamaha YZ 2019 Series Owner's Service Manual page 199

CRANKSHAFT ASSEMBLY AND BALANCER SHAFT ................................5-69
REMOVING THE CRANKSHAFT ASSEMBLY ........................................5-70
CHECKING THE CRANKSHAFT ASSEMBLY .........................................5-70
INSTALLING THE CRANKSHAFT ASSEMBLY .......................................5-70
INSTALLING THE BALANCER SHAFT ...................................................5-71
TRANSMISSION.............................................................................................5-72
REMOVING THE TRANSMISSION..........................................................5-73
CHECKING THE SHIFT FORKS ..............................................................5-73
CHECKING THE SHIFT DRUM ASSEMBLY ...........................................5-73
CHECKING THE TRANSMISSION ..........................................................5-74
INSTALLING THE TRANSMISSION ........................................................5-74