Yamaha XT660R Service Manual page 196

FRONT AND REAR BRAKES
WARNING
_
• Use only the designated brake fluid.
Other brake fluids may cause the piston
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.
CAUTION:
_
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
5. Bleed:
• brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" in chapter 3.
6. Check:
• brake fluid level
Below the minimum level mark a → Add
the recommended brake fluid to the proper
level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" in chapter 3.
7. Check:
• brake pedal operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" in chapter 3.
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CHAS