light YAMAHA YFM660R 2002 User Guide

4-13 1. Light switch “OFF/ /”
2. Engine stop switch “/”
3. Start switch “”
1. Contacteur d’éclairage “OFF/ /”
2. Coupe-circuit du moteur “/”
3. Contacteur du démarreur “”
1. Interruptor de luces “OFF/ /”
2. Interruptor de paro del motor “/”
3. Interruptor de arranque “”
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Engine stop switch “/”
Make sure that the engine stop switch is in the
“” position. The engine stop switch controls ig-
nition and can be used at all times to stop the en-
gine, especially in an emergency. The engine will
not start or run when the engine stop switch is
turned to “”.
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Start switch “”
The starter motor cranks the engine when this
switch is pushed.CAUTION:
See starting instructions prior to starting the
engine. (See page 6-3 for details.)
U5LP61.book Page 13 Monday, August 27, 2001 3:49 PM

5-1
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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

5-21
EBU00151
Throttle 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 necessary
for proper operation.
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Fittings 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.
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Lights
Check the headlights and tail/brake light to make
sure they are in working condition. Repair as nec-
essary for proper operation.
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Switches
Check the operation of the light switch, engine
stop switch and any other switches. Repair as nec-
essary for proper operation.
U5LP61.book Page 21 Monday, August 27, 2001 3:49 PM

6-5 1. Fully open 2. Half open
3. Closed
1. Complètement ouvert 2. Mi-ouvert
3. Fermé
1. Abre completamente 2. Semiabierto
3. Cerrado
NOTE:This model is equipped with an ignition circuit cut-
off system. The engine can be started under the
following conditions.

When the transmission is in neutral. The neu-
tral indicator light should come on. If the light
does not come on, ask a Yamaha dealer to
inspect it.


When the clutch is disengaged with the trans-
mission in any position. However, it is recom-
mended to shift into neutral before starting
the engine.
5. Use the starter (choke) in reference to the fig-
ure:
Position
1: Cold engine start-
ambient temperature below 5°
C.
Position
2: Cold engine start-
ambient temperature at 0°
C ~
30°
C and warming up position.
Position
3: Cold engine start-
ambient temperature above 25°
C
and warm engine start position.
U5LP61.book Page 5 Monday, August 27, 2001 3:49 PM

6-9
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Starting a warm engine
To start a warm engine, refer to the “Starting a cold
engine” section. The starter (choke) should not be
used. The throttle should be opened slightly.
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Warming up
To get maximum engine life, always warm up the
engine before starting off. Never accelerate hard
with a cold engine! To see whether or not the en-
gine is warm, check if it responds to the throttle
normally with the starter (choke) turned off.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 9 Monday, August 27, 2001 3:49 PM

6-11 1. Reverse knob “REV”
2. Shift pedal
1. Bouton de marche arrière “REV”
2. Pédale de sélection
1. Botón de marcha atrás “REV”
2. Pedal del cambio
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Reverse knob operation and reverse drivingCAUTION:
Before shifting, stop the machine and return
the throttle lever to its closed position. Other-
wise the transmission may be damaged. 1. Bring the machine to a complete stop, return
the throttle lever to the closed position, apply
the clutch lever, and shift the transmission
into first gear.
2. While applying the rear brake pedal, turn the
reverse knob clockwise with your right hand.
3. Shift the transmission into reverse by press-
ing down on the shift pedal.NOTE:When in reverse, the reverse indicator light should
be on. If the light does not come on, ask a Yamaha
dealer to inspect the machine.
U5LP61.book Page 11 Monday, August 27, 2001 3:49 PM

6-15 1. Shift pedal N. Neutral position
R. Reverse
1. Pédale de sélection N. Point mort
R. Marche arrière
1. Pedal del cambio N. Posición de punto muerto
R. Marcha atrás
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Shifting
This model has a 5-speed forward and 1-speed re-
verse transmission. The transmission allows you
to control the amount of power you have available
at a given speed or for starting, accelerating,
climbing hills, etc. To shift into neutral, return the
throttle lever to its original position, apply the
clutch and repeatedly depress the shift pedal until
it stops. When it stops, it will be in first gear. Raise
the pedal slightly to neutral.CAUTION:_

Do not coast for long periods with the en-
gine off, and do not tow the machine a long
distance. Even in neutral position, the
transmission is only properly lubricated
when the engine is running. Inadequate lu-
brication may cause damage.


Always use the clutch when changing
gears. The engine, transmission and drive
train are not designed to withstand the
shock of forced shifting and can be dam-
aged by shifting without the clutch.
_
U5LP61.book Page 15 Monday, August 27, 2001 3:49 PM

7-41 1. Lean towards inside of turn.
2. Support your weight on the outer footboard.
1. Se pencher vers l’intérieur du virage.
2. Faire reposer son poids sur le repose-pied extérieur.
1. Inclínese hacia el interior del giro.
2. Apoye su peso en la estribera del lado exterior
As you approach a curve, slow down and begin to
turn the handlebars in the desired direction. As
you do so, put your weight on the footboard to the
outside of the turn (opposite your desired direc-
tion) and lean your upper body into the turn. Use
the throttle to maintain an even speed through the
turn. This maneuver will let the wheel on the inside
of the turn slip slightly, allowing the ATV to make
the turn properly.
This procedure should be practiced at slow speed
many times in a large off-road area with no obsta-
cles. If an incorrect technique is used, your ATV
may continue to go straight. If the ATV doesn’t
turn, come to a stop and then practice the proce-
dure again. If the riding surface is slippery or loose,
it may help to position more of your weight over the
front wheels by moving forward on the seat. Once
you have learned this technique you should be
able to perform it at higher speeds or in tighter
curves.
U5LP61.book Page 41 Monday, August 27, 2001 3:49 PM

7-59
CROSSING A SLOPE
Traversing a sloping surface on your ATV requires
you to properly position your weight to maintain
proper balance. Be sure that you have learned the
basic riding skills on flat ground before attempting
to cross a sloping surface. Avoid slopes with slip-
pery surfaces or rough terrain that may upset your
balance.
As you travel across a slope, lean your body in the
uphill direction. It may be necessary to correct the
steering when riding on loose surfaces by pointing
the front wheels slightly uphill. When riding on
slopes be sure not to make sharp turns either up or
down hill.
U5LP61.book Page 59 Monday, August 27, 2001 3:49 PM

8-41 1. Spark plug cap
1. Capuchon de bougie
1. Tapa de bujía
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Spark plug inspection
Removal
1. Remove the spark plug cap.
2. Use the spark plug wrench in the tool kit to re-
move the spark plug as shown.
Inspection
The spark plug is an important engine component
and is easy to inspect. The condition of the spark
plug can indicate the condition of the engine.
The ideal color on the white insulator around the
center electrode is a medium-to-light tan color for a
ATV that is being ridden normally.
Do not attempt to diagnose such problems your-
self.
Instead, take the ATV to a Yamaha dealer. You
should periodically remove and inspect the spark
plug because heat and deposits will cause the
spark plug to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon and
other deposits are excessive, you should replace
the spark plug with the specified plug.
U5LP61.book Page 41 Monday, August 27, 2001 3:49 PM