engine YAMAHA YFM80R 2002 User Guide

Since removal of this plate will result in a signifi-
cant 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.
For air intake restrictor plate removal instruc-
tions, see page 8-33.wImproper adjustment of the speed limiter and
throttle could cause throttle cable damage or
improper throttle operation. You could lose
control, have an accident or be injured. Do
not turn the speed adjuster out more than 20
mm or the throttle cable could be damaged.
4-11
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4-17
EBU00075Parking brake
Use the parking brake when you have to start
the engine or park the machine, especially on a
slope. Apply the rear brake lever and push down
the lock plate to apply the parking brake.
Squeeze the rear brake lever to release the
parking brake.w8Always set the parking brake before start-
ing the engine. The ATV could start mov-
ing unexpectedly if the parking brake is
not applied. This could cause loss of con-
trol or a collision.
8Always be sure you have released the
parking brake before you begin to ride.
The brake could overheat if you ride the
ATV without releasing the parking brake.
You could lose braking performance
which could cause an accident. You could
also wear out the brakes prematurely.
q
1. Lock plate1. Plaque de verrouillage1. Placa de bloqueo
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4-19
EBU00083Shift pedal
This machine is equipped with a constant-mesh
3-speed transmission. The shift pedal is located
on the left side of the engine. Neutral is at the
bottom position.EBU00092Fuel tank cap
Remove the fuel tank cap by turning it counter-
clockwise.
q
3
2
1N
q
1. Shift pedal N. Neutral1. Pédale de sélection N. Point mort1. Pedal del cambio N. Punto muerto
1. Fuel tank cap1. Bouchon de réservoir de carburant1. Tapón del depósito de combustible
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4-21
EBU00093Fuel cock
The fuel cock supplies fuel from the fuel tank to
the carburetor.
The fuel cock has three positions.
OFF: With the lever in this position fuel will not
flow. Always turn the lever to this position
when the engine is not running.
ON: With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
RES: This indicates reserve. If you run out of
fuel while riding, turn the lever to this
position. THEN FILL THE FUEL TANK
AT THE FIRST OPPORTUNITY. After
refuelling, return the fuel cock lever to the
“ON” position.
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4-23
EBU00096Choke lever
The choke is used to start a cold engine. Refer
to “Starting a cold engine” for proper operation.
(See page 6-3.)
q
w
ea
a. Choke lever 2. Half open (warming up position)
1. Fully open “ON” 3. Closed “OFF”a. Levier de choke 2. Mi-course (position de chauffe)1. Pleine course “ON” 3. Fermé “OFF”a. Palanca del starter
1. Abierto completamente “ON”
2. Semiabierto (posición de calentamiento)
3. Cerrado “OFF”
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5-1
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brakes9Check operation, condition and free play.
5-5~ 5-7, 8-41 ~ 8-49
9Adjust if necessary.
Fuel9Check fuel level.
9Fill with fuel if necessary.5-9 ~ 5-11
Engine oil9Check oil level.
9Fill with oil if necessary.5-11 ~ 5-15, 8-13 ~ 8-17
Final gear oil9Check for leakage. 5-15, 8-19 ~ 8-21
Throttle9Check for proper throttle cable operation. 5-17
Wheels and tires9Check tire pressure, wear and damage. 5-19 ~ 5-25, 8-57
Fittings and fasteners9Check all fittings and fasteners. 5-17
Battery9Check fluid level.
5-17, 8-59 ~ 8-65
9Fill with distilled water if necessary.
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5-9
EBU00909Fuel
Make sure there is sufficient gasoline in the
tank.NOTE:
(for Europe only)
If knocking or pinging occurs, use a different
brand of gasoline or higher octane grade.cCUse only unleaded gasoline. The use of leaded
gasoline will cause severe damage to internal
engine parts, such as the valves and piston
rings, as well as to the exhaust system.
Recommended fuel: Regular gasoline
For Europe: Regular unleaded gasoline
only with a research octane
number of 91 or higher.
For Australia: Unleaded gasoline only
Fuel tank capacity:
Total:
6.8L
Reserve:
0.9 L
1. Filler tube 2. Fuel level1. Tube de remplissage 2. Niveau de carburant1. Tubo de llenado 2. Nivel de combustible
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5-11
w8Do not overfill the fuel tank. Fuel expands
when it heats up. If the fuel tank is over-
filled, fuel could spill out due to heat from
the engine or the sun.
8Be careful not to spill fuel, especially on
the engine or exhaust pipe which can
cause a fire and severe injury. Wipe up
any spilled fuel immediately.
8Do not refuel right after the engine has
been running and is still very hot.
8Be sure the fuel tank cap is closed secure-
ly.EBU00445Engine oil
Make sure the engine oil is at the specified level.
Add oil as necessary. (See page 8-13 for
details.)
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5-13
cCBe sure to use motor oils that do not contain
anti-friction modifiers. Passenger car motor
oils (often labeled “ENERGY CONSERVINGII”) contain anti-friction additives which will
cause clutch and/or starter clutch slippage,
resulting in reduced component life and poor
engine performance.Recommended oil:
Recommended engine oil classification:
API Service SE, SF, SG type or higher
–20° 10° 20° 30° 40°
10W30
10W40
20W40
20W5050°C
0° –10°
5W30
15W40
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5-17
EBU00151Throttle lever
Check to see that the throttle lever operates cor-
rectly. It must open smoothly and spring back to
idle position when released. Repair as neces-
sary for proper operation.EBU00152Fittings and Fasteners
Always check the tightness of chassis fittings
and fasteners before a ride. Take the machine
to a Yamaha dealer or refer to the Service
Manual for correct tightening torque. EBU00154Switches
Check the operation of the start switch, engine
stop switch and any other switches. Repair as
necessary for proper operation.EBU00499Battery
Check fluid level and fill if necessary. Use only
distilled water if refilling is necessary. (See
pages 8-59 ~ 8-65.)
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