Yamaha GRIZZLY Ultramatic YFM660FP Owner's Manual page 154

FRONT
1. Minimum level mark
REAR
1. Maximum level mark
Observe these precautions:
1. When checking the fluid level, make sure
the top of the master cylinder reservoir is
level by turning the handlebars.
2. Use only the designated quality brake flu-
id. Otherwise, the rubber seals may dete-
riorate, causing leakage and poor brake
performance.
Recommended brake fluid: DOT 4
3. Refill with the same type of brake fluid.
Mixing fluids may result in a harmful
chemical reaction and lead to poor brake
performance.
4. Be careful that water does not enter the
master cylinder reservoir when refilling.
Water will significantly lower the boiling
point of the fluid and may result in vapor
lock.
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