Polaris OUTLAW 90 Owner's Manual page 26

Safety
Safety Warnings
Crossing Hillsides
Driving on a sidehill is not recommended. Improper procedure
could cause loss of control or overturn. Avoid crossing the
side of any hill unless absolutely necessary.
If crossing a hillside is unavoidable, always follow proper
procedures as described in the owner's manual. See page 86.
Never attempt to turn the ATV around on any hill until you've
mastered the turning technique (on level ground) as
described in the owner's manual. See page 88.
23