2005 YAMAHA YFM80R engine

6-13
EBU00200
Shifting
This model has a 3-speed forward transmission
with centrifugal automatic clutch. The transmis-
sion allows you to control the amount of power
you have available at a given speed or for start-
ing accelerating, climbing, etc. To shift into neu-
tral, return the throttle lever to its original posi-
tion and repeatedly depress the shift pedal until
it stops.
cC
Do not coast for long periods with the engine
off, and do not tow the machine a long dis-
tance. Even with gears in neutral, the trans-
mission is only properly lubricated when the
engine is running. Inadequate lubrication
may damage the transmission.
q
3
2
1
N
1. Shift pedal N. Neutral position1. Pédale de sélection N. Position de la point mort 1. Pedal del cambio N. Posición del punto muerto
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6-15
EBU00650
To start out and accelerate:
1. Release the throttle lever.
cC
Always close the throttle while shifting
gears. Otherwise, damage to the engine and
drive train may result.
2. Shift into first gear and release the shift
pedal.
3. Open the throttle gradually.
4. Once the machine has attained adequate
speed, release the throttle lever.
5. Shift into second gear and release the shift
pedal.
6. Open the throttle gradually.
7. Follow the same procedure when shifting
to the next higher gear.
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6-19
EBU00208
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.
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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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6-21
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.
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6-25
EBU00211
Parking
When parking, stop the engine and shift into
neutral. Turn the fuel cock to “OFF” and apply
the parking brake.q
1
1. Lock plate1. Plaque de verrouillage1. Placa de bloqueo
1. Locked position
1. Verrouillé1. Posición bloqueada
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6-27
EBU02201
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 ATV 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 brakes in low gear.
2. Stop the engine.
3. With the rear brake lever and pedal
applied, apply the parking brake and slowly
release the rear brake pedal.
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7-7
Riding your machine 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 12
years of age.
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A child under 12 should never operate an
ATV with engine size greater than 70cc. 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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1. Locknut 2 Adjuster1. Contre-écrou 2. Dispositif de réglage1. Contratuerca 2. Ajustador
7-17
Speed limiter
For riders inexperienced with this model, this model
is equipped with a speed limiter in the throttle lever
housing. The speed limiter limits the power and top
speed of the ATV. Turning the screw in decreases
top speed, and turning it out increases top speed.
This model also has an air intake restrictor plate to
limit the amount of engine power available.
Yamaha recommends that all beginners start off
with the speed limiter turned in and the air intake
restrictor plate installed to limit the amount of speed
available while they learn. The limiter may be grad-
ually adjusted to increase maximum speed as the
beginner becomes more familiar with operating the
ATV. Parents should decide when to adjust the
ATV for more power as their youngster’s riding
skills improve. Once the ATV rider can operate with
skill at the top speed permitted by adjusting the
speed limiter alone, the air intake restrictor plate
can be removed. Since removal of this plate will
result in a significant increase in power, turn the
speed limiter completely back in again; adjust it out
in stages as you did before.
Adjusting for maximum throttle lever movement
without removing the air intake restrictor plate will
cause the engine to run roughly at higher speeds.
qw
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