Yamaha YZ450FX 2019 Owner's Service Manual page 150

TIP
Turn the handlebar toward right and left to make
sure that the brake hose does not touch other
parts (e.g., wire harness, cables, leads). Adjust
if necessary.
a
3. Pour brake fluid to the brake master cylinder
reservoir up to the specified level.
Specified brake fluid
DOT 4
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.
4. Bleed:
• Brake system
Refer to "BLEEDING THE BRAKE SYSTEM"
on page 3-21.
5. Check:
• Brake fluid level
The minimum level mark "a" or below  Add.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-26.
a
a
b
6. Check:
• Brake lever free play
• Brake lever operation
4-22
FRONT BRAKE
a
Refer to "ADJUSTING THE FRONT BRAKE"
on page 3-22.
A softy or spongy feeling  Bleed the brake
system.
Refer to "BLEEDING THE BRAKE SYSTEM"
on page 3-21.
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