Yamaha BRUIN 350 YFM350FAT Owner's Manual page 220

If your ATV has stalled or stopped and you believe
you can continue up the hill, restart carefully to
make sure you do not lift the front wheels which
could cause you to lose control. If you are unable
to continue up the hill, dismount the ATV on the
uphill side. Physically turn the ATV around and
then descend the hill.
If you start to roll backwards, DO NOT apply either
brake abruptly. If you are in 2WD, apply only the
front brake. When this ATV is in 4WD, all wheels
(front and rear) are interconnected by the drive
train. This means that applying either the front
brake or the rear brake will brake all wheels. When
descending hills, using either brake lever or the
brake pedal will brake the wheels on the downhill
side. Avoid sudden application of either the front or
rear brake because the wheels on the uphill side
could come off the ground. The ATV could easily
tip over backwards. Apply both the front and rear
brakes gradually, or dismount the ATV immediate-
ly on the uphill side.
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