Yamaha BIG BEAR YFM400FPP Owner's Manual page 182

This machine is designed to carry operator
and cargo only - passengers prohibited.
WARNING
Never carry a passenger. The long seat is to al-
low the operator to shift position as needed
during operation. It is not for carrying passen-
gers. Carrying a passenger on this ATV greatly
reduces your ability to balance and control this
ATV. It could cause an accident, resulting in
harm to you and/or your passenger.
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