Yamaha YZ450FX 2021 Owner's Service Manual page 141

Disassembling the rear brake master cylinder
S
Order Job/Parts to remove
1 Dust boot
2 Circlip
3 Push rod
4 Brake master cylinder kit
BF
4 New
3
2 New
1
Q'ty
1
1
1
1
4-27
REAR BRAKE
Remarks