Yamaha BIG BEAR YFM400FPP Owner's Manual page 114

Brake fluid leakage
Check to see if any brake fluid is leaking out of the
hose, joint or master cylinder of the front brake.
Apply the brake firmly for one minute. If the lever
moves slowly inward, there may be a leak in the
brake system. If there is any leakage, the brake
system should be inspected by a Yamaha dealer.
Brake operation
Test the brakes at slow speed after starting out to
make sure they are working properly. If the brakes
do not provide proper braking performance, inspect
the brakes for wear. (See pages 8-55 ~ 8-57.)
WARNING
_
Always check the brakes at the start of every
ride. Do not ride the ATV if you find any prob-
lem with the brakes or you could lose braking
ability, which could lead to an accident. If a
problem cannot be corrected by the adjust-
ment procedures provided in this manual,
have the ATV inspected by a Yamaha dealer.
_
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