Checking The Front Brake Pads; Checking The Rear Brake Pads; Checking The Front Brake Hose - Yamaha YZ450FP 2023 Owner's Service Manual

Specified brake fluid
DOT 4
a a a
A. Front brake
B. Rear brake
EWA13090
WARNING
• Use only the designated brake fluid. Other
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
• Refill with the same type of brake fluid that
is already in the system. Mixing brake fluids
may result in a harmful chemical reaction,
leading to poor brake performance.
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor lock.
ECA13540
NOTICE
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
EAM30231

CHECKING THE FRONT BRAKE PADS

The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check:
• Front brake pad
Wear indicator grooves "1" almost touch the
brake disc  Replace the brake pads as a
set.
Refer to "FRONT BRAKE" on page 4-16.
a a
EAM30232

CHECKING THE REAR BRAKE PADS

The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check:
• Rear brake pad
Wear indicator grooves "1" almost disap-
peared  Replace the brake pads as a set.
Refer to "REAR BRAKE" on page 4-27.
EAM30478

CHECKING THE FRONT BRAKE HOSE

1. Check:
• Brake hose
Cracks/damage/wear  Replace.
2. Check:
• Brake hose clamp
Loose connection  Tighten the clamp bolt.
3. Stand the vehicle upright and apply the front
brake several times.
4. Check:
• Brake hose
Brake fluid leaks  Replace the damaged
brake hose.
Refer to "FRONT BRAKE" on page 4-16.
5. Check:
• Protector "1"
Out of specification  Replace.
TIP
The protector reaches the limit of its use when it
is worn down to the same height "a" as of the
plastic locking tie circumference.
3-25
CHASSIS
1
1