2002 YAMAHA YFM660R light

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
EBU00199
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
EBU00680
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

8-75 1. Rear brake light switch
2. Adjusting nut
1. Contacteur de feu stop sur frein arrière
2.Écrou de réglage
1. Interruptor de la luz de freno trasero
2. Tuerca de ajuste
EBU00833
Adjusting the rear brake light switch
The rear brake light switch, which is activated by
the brake pedal and brake lever, is properly adjust-
ed when the brake light comes on just before brak-
ing takes effect. If necessary, adjust the brake light
switch as follows.
Turn the adjusting nut while holding the rear brake
light switch in place. To make the brake light come
on earlier, turn the adjusting nut in direction
a. To
make the brake light come on later, turn the adjust-
ing nut in direction
b.
U5LP61.book Page 75 Monday, August 27, 2001 3:49 PM

8-107 1. Headlight assembly 2. Bolt (× 2)
1. Bloc de phare 2. Boulon (× 2)
1. Conjunto faro 2. Perno (× 2)
1. Headlight coupler
1. Coupleur de phare
1. Acoplador
EBU01025
Replacing a headlight bulb
1. Remove the headlight assembly by removing
the bolts.
2. Disconnect the headlight coupler.
U5LP61.book Page 107 Monday, August 27, 2001 3:49 PM

8-109 1. Screw
1. Vis
1. Tornillo
1. Screw
1. Vis
1. Tornillo
3. Remove the screw.
4. Remove the headlight cover from the head-
light assembly.
5. Remove the screw and pull the headlight unit
out from its case.NOTE:_ Pull outward on the rear of the headlight unit, and
then pull outward on the front. _
U5LP61.book Page 109 Monday, August 27, 2001 3:49 PM

8-111 1. Headlight unit 2. Headlight case
1. Optique de phare 2. Support du phare
1. Unidad del faro 2. Caja del faro
1. Headlight bulb holder cover
1. Cache de la fixation d’ampoule de phare
1. Cubierta del portabombillas del faro
6. Remove the headlight bulb holder cover.
U5LP61.book Page 111 Monday, August 27, 2001 3:49 PM