Yamaha YFM660FS Grizzly 4x4 Supplementary Service Manual page 385

FRONT AND REAR BRAKES
2.Fill:
Brake fluid reservoir
G
CAUTION:
Brake fluid may damage painted surfaces
or plastic parts. Always clean up spilled
brake fluid immediately.
WARNING
Use only the designated quality brake
G
fluid: other brake fluids may deteriorate
the rubber seals, causing leakage and
poor brake performance.
Refill with the same type of brake fluid:
G
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
G
brake master cylinder when refilling.
Water will significantly lower the boiling
point of the brake fluid and may result in
vapor lock.
3.Air bleed:
Brake system
G
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" in CHAPTER 3.
4.Check:
Brake fluid level
G
Brake fluid level is under the "LOWER" level
line → Fill up.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" in CHAPTER 3.
8 - 25
CHAS
Recommended brake fluid:
DOT 4