Yamaha 2009 YZF-R1 (Y) Service Manual page 209

• 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 perfor-
mance.
• 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
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 HYDRAULIC
BRAKE SYSTEM" on page 3-17.
4. 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" on page 3-15.
5. Check:
• Brake pedal operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-17.
6. Adjust:
• Brake pedal position
Refer to "ADJUSTING THE REAR DISC
BRAKE" on page 3-16.
Brake pedal position (from the
top of the brake pedal to the
center of the bolt mount on the
rider footrest bracket)
12–21 mm (0.47–0.83 in)
7. Adjust:
• Rear brake light operation timing
Refer to "ADJUSTING THE REAR
BRAKE LIGHT SWITCH" on page 3-33.
4-54
REAR BRAKE