Yamaha Ultramatic GRIZZLY 660 Owner's Manual page 87

Avoid wheelies and jumping. You may lose
control of the machine or overturn.
WARNING
POTENTIAL HAZARD
Attempting wheelies, jumps, and other
stunts.
WHAT CAN HAPPEN
Increases the chance of an accident, in-
cluding an overturn.
HOW TO AVOID THE HAZARD
Never attempt stunts, such as wheelies
or jumps. Don't try to show off.
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