Yamaha GRIZZLY ULTRAMATIC YFM660FP Owner's Manual page 90

WARNING
_
Always ride at a slow speed when the ATV is in
4WD-LOCK, and allow extra time and distance
for maneuvers.
All wheels turn at the same speed when the dif-
ferential is locked, so it takes more effort to
turn the ATV. The amount of effort is more the
faster you go. You may lose control and have
an accident if you cannot make a sharp
enough turn for the speed you are traveling.
_
NOTE:
_
G When the switch is set to "LOCK", the differ-
ential gear lock indicator light will flash until
the differential gear is locked.
G
When the indicator light is flashing, turning
the handlebar back and forth will help the dif-
ferential gear lock to engage.
G
Riding before the differential gear lock is
properly engaged (e.g., when the indicator
light is flashing) will cause the engine speed
to be limited until engagement is complete.
G
When the ATV is in 4WD-LOCK, the maxi-
mum traveling speed is limited to 35 km/h.
_
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