Yamaha BIG BEAR PROFESSIONAL 400 YFM400FPT Owner's Manual page 184

Do not operate after consuming alcohol or
drugs.
Operator's performance capability is reduced by
the influence of alcohol or drugs.
WARNING
_
Never consume alcohol or drugs before or
while driving this ATV.
_
Pre-operation checks
Always perform the pre-operation checks listed on
page 5-1 before riding for safety and proper care
of the ATV.
WARNING
_
Always inspect your ATV each time you use it
to make sure the ATV is in safe operating con-
dition. Always follow the inspection and main-
tenance procedures and schedules described
in the Owner's Manual. Failure to inspect the
ATV before operating or failure to properly
maintain the ATV increases the possibility of
an accident or equipment damage.
_
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