engine YAMAHA YFM660R 2002 Notices Demploi (in French)

4-15 1. Throttle lever
1. Levier d’accélération
1. Palanca de aceleración
EBU00063
Throttle lever
Once the engine is running, movement of the
throttle lever will increase the engine speed.
Regulate the speed of the machine by varying the
throttle position. Because the throttle is spring-
loaded, the machine will decelerate, and the en-
gine will return to an idle any time the hand is re-
moved from the throttle lever.
Before starting the engine, check the throttle to be
sure it is operating smoothly. Make sure it returns
to the idle position as soon as the lever is released.
WARNING
Malfunction of the throttle could make it diffi-
cult to speed up or slow down when you need
to. This could cause an accident. Check the
operation of the throttle lever before you start
the engine. If the throttle does not work
smoothly, check for the cause. Correct the
problem before riding the ATV or consult a
Yamaha dealer.
U5LP61.book Page 15 Monday, August 27, 2001 3:49 PM

4-17 1. Locknut 2. Adjuster a. 12 mm
1. Contre-écrou 2. Dispositif de réglage
1. Contratuerca 2. Ajustador
EBU00565
Speed limiter
The speed limiter keeps the throttle from fully
opening, even when the throttle lever is pushed to
the maximum. Screwing in the adjuster limits the
maximum engine power available and decreases
the maximum speed of the ATV.
WARNING
Improper 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 12 mm
or the throttle cable could be damaged. Always
make sure the throttle lever free play is adjust-
ed to 3 ~ 5 mm. See page 8-55.
U5LP61.book Page 17 Monday, August 27, 2001 3:49 PM

4-19 1. Clutch lever
1. Levier d’embrayage
1. Palanca de embrague
1. Brake lever
1. Levier de frein
1. Palanca del freno
EBU00069
Clutch lever
The clutch lever is located on the left handlebar
and the ignition circuit cut-off system is incorporat-
ed in the clutch lever holder. Pull the clutch lever to
the handlebar to disengage the clutch, and release
the lever to engage the clutch. The lever should be
pulled rapidly and released slowly for smooth
clutch operation. (Refer to “Starting a cold engine”
for a description of the ignition circuit cut-off sys-
tem.)
EBU00988
Brake lever
The brake lever is located on the right handlebar.
Pull it toward the handlebar to apply the front
brake.
U5LP61.book Page 19 Monday, August 27, 2001 3:49 PM

4-23 1. Button 2. Lock plate
1. Bouton 2. Verrou
1. Botón 2. Placa de bloqueo
1. Locked position
1. Position verrou bloqué
1. Posición bloqueada
EBU00081
Parking brake
Use the parking brake when you have to start the
engine or park the machine, especially on a slope.
Squeeze the clutch lever while pushing the button,
then push in the lock plate to apply the parking
brake. Squeeze the clutch lever to release the
parking brake.NOTE:When the parking brake is used, engine speed is
limited to 2,300 r/min. Be sure the parking brake is
released before moving the throttle lever. Other-
wise, the engine will misfire, preventing normal op-
eration.
U5LP61.book Page 23 Monday, August 27, 2001 3:49 PM

4-25
WARNING


Always 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 control or
a collision.


Always 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.
U5LP61.book Page 25 Monday, August 27, 2001 3:49 PM

4-27 1. Shift pedal
1. Pédale de sélection
1. Pedal de cambios
1. Reverse knob “REV”
1. Bouton de marche arrière “REV”
1. Botón de marcha atrás “REV”
EBU00788
Shift pedal
This machine is equipped with a constant-mesh
5-speed forward and 1-speed reverse transmis-
sion. The shift pedal is located on the left side of
the engine and is used in combination with the
clutch when shifting.
EBU01028
Reverse knob “REV”
The reverse knob is used to shift into reverse gear.
Refer to the “Reverse knob operation and reverse
driving” section (page 6-11) before operating this
machine in reverse gear.
U5LP61.book Page 27 Monday, August 27, 2001 3:49 PM

4-29 1. Fuel tank cap
1. Bouchon du réservoir de carburant
1. Tapón del depósito de combustible
EBU00092
Fuel tank cap
Remove the fuel tank cap by turning it counter-
clockwise.
EBU00093
Fuel 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, re-
turn the fuel cock lever to the “ON” position.
U5LP61.book Page 29 Monday, August 27, 2001 3:49 PM

4-31 1. Starter (choke) “”
1. Starter (enrichisseur) “”
1. Starter (choke) “”
EBU00095
Starter (choke) “”
Starting a cold engine requires a richer air-fuel
mixture. A separate starter circuit supplies this
mixture.
Move in direction
a to turn on the starter (choke).
Move in direction
b to turn off the starter (choke).
Refer to “Starting a cold engine” for proper opera-
tion. (See page 6-3.)
U5LP61.book Page 31 Monday, August 27, 2001 3:49 PM

5-1
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Front brakeCheck operation, free play, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5 ~ 5-7,
8-59 ~ 8-67
Rear brakeCheck operation, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5 ~ 5-7,
8-59 ~ 8-65, 8-69
ClutchCheck operation, condition and lever free play. 8-77
Parking brakeCheck operation, condition and cable free play. 8-71 ~ 8-73
FuelCheck fuel level.
Fill with fuel if necessary.5-9 ~ 5-11
Engine oilCheck oil level.
Fill with oil if necessary.5-13 ~ 5-15,
8-17 ~ 8-29
Coolant reservoirCheck coolant level.
Fill with coolant if necessary.5-17 ~ 5-19,
8-31 ~ 8-39
Drive chainCheck chain slack and condition.
Adjust if necessary.5-19, 8-77 ~ 8-83
ThrottleCheck for proper throttle cable operation and free play. 5-21, 8-55
Wheels and tiresCheck tire pressure, wear and damage.5-23 ~ 5-29,
8-95 ~ 8-97
Fittings and fastenersCheck all fittings and fasteners. 5-21
LightsCheck for proper operation. 5-21, 8-107 ~ 8-117
U5LP61.book Page 1 Monday, August 27, 2001 3:49 PM

5-9
EBU00998*
Fuel
Make sure there is sufficient gasoline in the tank.NOTE:_ If knocking or pinging occurs, use a different brand
of gasoline or higher octane grade. _CAUTION:_ Use 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:
For Europe: Regular unleaded gasoline only
with a research octane number of 91 or
higher.
Fuel tank capacity:
Total:
12 L
Reserve:
2.6 L
U5LP61.book Page 9 Monday, August 27, 2001 3:49 PM