Polaris OUTLAW 90 Owner's Manual page 28

Safety
Safety Warnings
Operating on Slippery Terrain
Failure to use extra caution when operating on excessively
rough, slippery or loose terrain could cause loss of traction,
loss of control, accident or overturn.
Do not operate on excessively rough, slippery or loose terrain
until you've learned and practiced the skills necessary to
control the ATV on such terrain.
Always use extra caution on rough, slippery or loose terrain.
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