Yamaha YZ450F Owner's Service Manual page 156

2. Pour brake fluid to the brake fluid reservoir
up to the specified level.
Recommended 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 flu-
ids may result in a harmful chemical reac-
tion, 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.
3. Bleed:
• Brake system
Refer to "BLEEDING THE BRAKE SYS-
TEM" on page 3-21.
4. Check:
• Brake fluid level
The minimum level mark "a" or below 
Add.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-26.
a
4-30
a
5. Check:
• Brake pedal operation
A softy or spongy feeling  Bleed the brake
system.
Refer to "BLEEDING THE BRAKE SYS-
TEM" on page 3-21.
REAR BRAKE