Yamaha GRIZZLY 80 YFM80GT Owner's Manual page 204

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Never operate the ATV on hills too steep for
the ATV or for your abilities. The vehicle can
overturn more easily on extremely steep hills
than on level surfaces or small hills. Practice
on smaller hills before attempting large hills.
It is important when climbing a hill to make sure
that your weight is transferred forward on the
ATV. This can be accomplished by leaning for-
ward and, on steeper inclines, standing on the
footboards and leaning forward over the handle-
bars.
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