Yamaha MOTO-4 1987 Owner's Manual page 51

Avoid sudden bursts of throttle which could
cause the machine to "'wheelie" when climb-
ing a hill. The front wheel must be kept on
the ground to avoid loss of directional control
and to prevent the possibility of the MOTO-4
tipping over backwards.
f If you are climbing a hill and you find that
you have not properly judged your ability
to make it to the top, you should turn the
MOTO-4 around while you still have forward
motion (provided you have the room to do
so) and go down the hill.
Be sure that you are using a steady speed
when you climb a hill, not so fast that you can
lose control or so slow that the engine will
stall. Downshift quickly and smoothly, if DO NOT attempt turning around on a hill
necessary, to maintain sufficient engine power, unless you have mastered the turning tech-
nique on flat ground.
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