engine YAMAHA YFZ450 2006 Notices Demploi (in French)

6-17
EBU02080
To decelerate:
When slowing down or stopping, release the
throttle and apply the brakes smoothly and
evenly. As you slow down, shift to a lower gear.
Be sure that the engine has sufficiently slowed
before engaging a lower gear. Improper use of
the brakes or shifting can cause the tires to lose
traction, reducing control and increasing the
possibility of an accident.
w
Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a
lower gear when the engine speed is too
high could make the wheels stop rotating.
This could cause loss of control, an accident
and injury. It could also cause engine or
drive train damage.
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6-19
EBU02092
Engine break-in
There is never a more important period in the
life of your machine than the period between
zero and 20 hours.
For this reason, we ask that you carefully read
the following material. Because the engine is
brand new, you must not put an excessive load
on it for the first several hours of running. During
the first 20 hours, the various parts in the engine
wear and polish themselves to the correct oper-
ating clearances.
During this period, prolonged full throttle opera-
tion or any condition which might result in exces-
sive engine heating must be avoided. However,
momentary (2-3 seconds maximum) full throttle
operation under load does not harm the engine.
Each full throttle acceleration sequence should
be followed with a substantial rest period for the
engine by cruising at lower r/min so the engine
can rid itself of the temporary build up of heat.
If any abnormality is noticed during this period,
consult a Yamaha dealer.
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6-23
1. Locked position1. Verrouillé1. Posición bloqueada
EBU02111
Parking
When parking, stop the engine and shift into first
gear. Turn the fuel cock to “OFF” and apply the
parking brake.
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6-25
EBU14270
Parking on a slope
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Avoid parking on hills or other inclines.
Parking on a hill or other incline could cause
the ATV to roll out of control, increasing the
chance of an accident. If you must park on
an incline, put the machine in low gear, apply
the parking brake, and block the front and
rear wheels with rocks or other objects.
Do not park the ATV at all on hills that are so
steep you could not walk up them easily.
1. Bring the machine to a stop by applying
the front brake.
2. With the front and rear brake applied, pull
the clutch lever, shift into the neutral posi-
tion, and then apply the parking brake.
3. Stop the engine by setting the engine stop
switch to “OFF”.
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7-7
Riding your ATV requires skills acquired
through practice over a period of time.
Take the time to learn the basic techniques well
before attempting more difficult maneuvers.
Not recommended for children under 16
years of age.
w
A child under 16 should never operate an
ATV with engine size greater than 90cc. Use
by children of ATVs that are not recommend-
ed for their age can lead to severe injury or
death of the child.
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7-25
Exhaust system
The exhaust system on the ATV is very hot dur-
ing and following operation. To prevent burns,
avoid touching the exhaust system. Park the
ATV in a place where pedestrians or children
are not likely to touch it. Dry grass or brush or
other combustible material accumulated around
the engine area could catch fire.
w
Do not touch the hot exhaust system. Do not
park the ATV during or after operation in a
place where others might be likely to touch
it. Keep the engine area free of dry grass,
brush, or other combustible material. Do not
operate, idle, or park the ATV in dry grass or
other dry ground cover.
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7-35
Select a large, flat, unpaved area to become
familiar with your ATV. Make sure that this area
is free of obstacles and other riders. You should
practice control of the throttle, brakes, shifting
procedures, and turning techniques in this area
before trying more difficult terrain. Always avoid
riding on paved surfaces: the ATV is designed
for use on unpaved surfaces only, and handling
maneuvers are more difficult to perform on
pavement.
Set the parking brake and follow the instruction
on page 6-3 to start the engine. Once it has
warmed up you are ready to begin riding your
ATV. As you get on the ATV, be sure not to
accidentally move the shift pedal. Remember
that the engine and exhaust pipe will be hot
when riding and afterwards; do not allow skin or
clothing to come in contact with these compo-
nents.
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7-37
With the engine idling, pull the clutch lever to
disengage the clutch and shift into 1st gear, and
then release the parking brake. Open the throttle
gradually, and at the same time, release the
clutch lever slowly. Once the ATV has attained
adequate speed, release the throttle lever and at
the same time, quickly pull in the clutch lever
and shift into 2nd gear. Open the throttle part
way and gradually release the clutch. Use this
same procedure as you move into the higher
gears. Be sure to coordinate the use of the throt-
tle and shift pedal properly. If the throttle is
applied too abruptly or if the throttle is not
released during shifting, or if the shift pedal is
not released before applying the throttle, the
front wheels may lift off the ground resulting in a
loss of directional control. Avoid higher speeds
until you are thoroughly familiar with the opera-
tion of your ATV.
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Always open the throttle gradually and
release the clutch lever slowly. Otherwise,
the ATV could wheelie which would increase
the chance of an accident.
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7-39
cC
Do not shift gears without releasing the
throttle. Damage to the engine or drive train
may occur.
When slowing down or stopping, release the
throttle and apply the brakes smoothly and
evenly. As you slow down, shift to a lower gear.
Be sure that the engine has sufficiently slowed
before engaging a lower gear. Improper use of
the brakes or shifting can cause the tires to lose
traction, reducing control and increasing the
possibility of an accident.
w
Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a
lower gear when the engine speed is too
high could cause the wheels to stop rotating.
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7-57
RIDING DOWNHILL
When riding your ATV downhill, shift your weight
as far to the rear and uphill side of the ATV as
possible. Move back on the seat and sit with
your arms straight. Choose a low gear which will
allow the engine compression to do most of the
braking for you. Improper braking may cause a
loss of traction.
Use caution while descending a hill with loose or
slippery surfaces. Braking ability and traction
may be adversely affected by these surfaces.
Improper braking may also cause a loss of trac-
tion.
Whenever possible, ride your ATV straight
downhill. Avoid sharp angles which could allow
the ATV to tip or roll over. Carefully choose your
path and ride no faster than you will be able to
react to obstacles which may appear.
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