Yamaha YZ450FN 2022, Owner'S Service Manual, Page: 99 / 366

CHASSIS
3-23
EAM20136
CHASSIS
EAM30479
ADJUSTING THE FRONT DISC BRAKE
TIP
There should be no free play at the brake lever
end.
1. Check:
•
Brake lever position “a”
2. Remove:
• Brake lever cover
3. Adjust:
• Brake lever position
a. Loosen the locknut “1”.
b. Turn the adjusting bolt “2” until the speci-
fied brake lever position is obtained.
c. Tighten the locknut.
WARNING
EWA13050
A soft or spongy feeling in the brake lever
can indicate the presence of air in the brake
system. Before the vehicle is operated, the
air must be removed by bleeding the brake
system. Air in the brake system will consid-
erably reduce braking performance.
NOTICE
ECA13490
After adjusting the brake lever position,
make sure there is no brake drag.
4. Install:
•
Brake lever cover
EAM30480
ADJUSTING THE REAR DISC BRAKE
1. Adjust:
• Brake pedal position
a. Loosen the locknut “1”.
b. Turn the adjusting bolt “2” until the brake
pedal is in the correct position.
c. Tighten the locknut.
WARNING
EWA19150
A soft or spongy feeling in the brake pedal
can indicate the presence of air in the brake
system. Before running, bleed the brake sys-
tem. Air in the brake system will cause brak-
ing performance to be reduced.
NOTICE
ECA13510
After adjusting the brake pedal position,
make sure there is no brake drag.
EAM30234
CHECKING THE BRAKE FLUID LEVEL
1. Stand the vehicle upright on a level surface.
TIP
In order to ensure a correct reading of the brake
fluid level, make sure that the top of the brake
fluid reservoir is horizontal.
2. Check:
• Brake fluid level
The minimum level mark “a” or below

Add.
Brake lever position
100 mm (3.94 in)
Extent of adjustment
86–105 mm (3.39–4.13 in)
Locknut
5 N·m (0.5 kgf·m, 3.7 lb·ft)
2
1
T
R
.
.
Locknut
6 N·m (0.6 kgf·m, 4.4 lb·ft)
1 1
2 2
T
R
.
.