Yamaha YZ450FX 2021 Owner's Service Manual page 143

2. Measure:
• Brake pad wear limit "a"
Out of specification  Replace the brake
pads as a set.
Brake pad lining thickness limit
1.0 mm (0.04 in)
3. Install:
• Brake pad
a. Connect the plastic hose "1" to the bleed
screw "2" and place a container under the
end of the plastic hose.
b. Loosen the bleed screw and push the
brake caliper piston in.
EWA19170
WARNING
Do not reuse the drained brake fluid.
c. Tighten the bleed screw.
6
7
TIP
• Install the brake pads with their projections "a"
into the brake caliper recesses "b".
• Temporarily tighten the pad pin at this point.
a
1
4-29
REAR BRAKE
Bleed screw
5 N·m (0.5 kgf·m, 3.7 lb·ft)
d. Install the brake pads "3" and the pad pin
"4".
4
e. Install the brake caliper "5" and the rear
wheel "6".
Refer to "REAR WHEEL" on page 4-9.
f. Tighten the pad pin "7".
Pad pin
17 N·m (1.7 kgf·m, 13 lb·ft)
7 7
g. Install the pad pin plug "8" and the
protector "9".
Pad pin plug
2.5 N·m (0.25 kgf·m, 1.8 lb·ft)
Bolt (protector)
7 N·m (0.7 kgf·m, 5.2 lb·ft)
3
a
b
6 6
5 5