Adjusting The Rear Brake; Checking The Front Brake Pads - Yamaha YZ450FX 2019 Owner's Service Manual

4. Install:
• Brake lever cover
EAM30230

ADJUSTING THE REAR BRAKE

1. Check:
• Brake pedal position "a"
(distance from the top of the rider footrest to
the top of the brake pedal)
Out of specification  Regulate.
Brake pedal position
5.0 mm (0.20 in)
2. Adjust:
• Brake pedal position
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a. Loosen the locknut "1".
b. Turn the adjusting bolt "2" in direction "a" or
"b" until the specified brake pedal position is
obtained.
Direction "a"
Brake pedal is raised.
Direction "b"
Brake pedal is lowered.
a a
b b
2 2
1 1
c. Tighten the locknut.
Locknut
6 N·m (0.6 kgf·m, 4.4 lb·ft)
EWA19150
WARNING
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.
ECA13510
NOTICE
After adjusting the brake pedal position,
make sure there is no brake drag.
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EAM30231

CHECKING THE FRONT BRAKE PADS

1. Measure:
• Brake pad thickness "a"
Out of specification  Replace as a set.
TIP
The pads worn up to the indicator "b" grooves
mean that the brake pad thickness limit is
reached.
a a
2. Replace:
• Brake pad
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the pad pin plug "1".
b. Loosen the pad pin "2".
c. Remove the brake caliper "3" from the front
fork.
3-23
CHASSIS
Brake pad lining thickness limit
1.0 mm (0.04 in)
b
a
a
1