Yamaha YZ450FX 2019 Owner's Service Manual page 198

CHECKING THE FRICTION PLATES ......................................................5-43
CHECKING THE CLUTCH PLATES ........................................................5-43
CHECKING THE CLUTCH SPRINGS ......................................................5-43
CHECKING THE CLUTCH HOUSING .....................................................5-44
CHECKING THE CLUTCH BOSS ............................................................5-44
CHECKING THE PRESSURE PLATE .....................................................5-44
CHECKING THE PUSH LEVER SHAFT ..................................................5-44
CHECKING THE CLUTCH PUSH RODS.................................................5-44
CHECKING THE PRIMARY DRIVE GEAR ..............................................5-44
CHECKING THE PRIMARY DRIVEN GEAR............................................5-45
INSTALLING THE OIL SEAL....................................................................5-45
INSTALLING THE RIGHT CRANKCASE COVER ...................................5-45
INSTALLING THE CLUTCH .....................................................................5-45
SHIFT SHAFT .................................................................................................5-48
REMOVING THE SHIFT GUIDE AND SHIFT LEVER ASSEMBLY .........5-49
REMOVING THE SEGMENT ...................................................................5-49
CHECKING THE SHIFT SHAFT ..............................................................5-49
CHECKING THE SHIFT GUIDE AND SHIFT LEVER ASSEMBLY..........5-49
CHECKING THE STOPPER LEVER........................................................5-49
INSTALLING THE STOPPER LEVER......................................................5-49
INSTALLING THE SEGMENT ..................................................................5-50
INSTALLING THE SHIFT GUIDE AND SHIFT LEVER ASSEMBLY........5-50
INSTALLING THE SHIFT SHAFT ............................................................5-51
INSTALLING THE SHIFT PEDAL ............................................................5-51
OIL PUMP AND BALANCER GEAR..............................................................5-52
REMOVING THE BALANCER..................................................................5-54
CHECKING THE PRIMARY DRIVE GEAR, BALANCER DRIVE GEAR, 
AND BALANCER WEIGHT GEAR ..........................................................5-54
CHECKING THE BALANCER ..................................................................5-54
CHECKING THE OIL PUMP ....................................................................5-54
ASSEMBLING THE OIL PUMP ................................................................5-55
INSTALLING THE OIL PUMP AND BALANCER GEAR ..........................5-55
AC MAGNETO ................................................................................................5-57
REMOVING THE AC MAGNETO .............................................................5-58
CHECKING THE AC MAGNETO .............................................................5-58
CHECKING THE WOODRUFF KEY ........................................................5-58
INSTALLING THE AC MAGNETO ...........................................................5-58
STARTER CLUTCH ........................................................................................5-60
CHECKING THE STARTER CLUTCH .....................................................5-61
CRANKCASE .................................................................................................5-62
DISASSEMBLING THE CRANKCASE .....................................................5-64
REMOVING THE CRANKCASE BEARING .............................................5-64
CHECKING THE TIMING CHAIN, TIMING CHAIN GUIDE, OIL 
STRAINER...............................................................................................5-64
CHECKING THE CRANKCASE ...............................................................5-64