Yamaha YFM660RN Service Manual page 141

FRONT AND REAR BRAKES
3.Fill:
Brake fluid reservoir
CAUTION:
Brake fluid may damage painted surfaces
or plastic parts. Always clean up spilled
brake fluid immediately.
WARNING
Use only the designated quality brake
fluid: Other brake fluids may deteriorate
the rubber seals, causing leakage and
poor brake performance.
Refill with the same type of brake fluid:
Mixing brake fluids may result in a harm-
ful chemical reaction and lead to poor
brake performance.
Be careful that water does not enter the
brake master cylinder when refilling.
Water will significantly lower the boiling
point of the brake fluid and may result in
vapor lock.
4.Air bleed:
Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" in CHAPTER 3.
5.Check:
Brake fluid level
Brake fluid level is below the "LOWER" level
line → Add the recomended brake fluid to the
proper level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" in CHAPTER 3.
4 - 26
CHAS
Recommended brake fluid:
DOT 4