2006 YAMAHA YFZ450 light

1. Lean towards inside of turn.
2. Support your weight on the outer footrest.
1. Se pencher vers l’intérieur du virage.
2. S’appuyer sur le repose-pied externe.
1. Inclínese hacia el interior del giro.
2. Descanse su peso en el descansapie externo.
7-43
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
direction) 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 unpaved area with
no obstacles. 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 procedure again. If the riding surface is slip-
pery or loose, it may help to position more of
your weight over the front wheels by moving for-
ward on the seat. Once you have learned this
technique you should be able to perform it at
higher speeds or in tighter curves.
5TG-9-62 7 5/12/05 4:28 PM Page 186

7-61
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 slippery surfaces or rough ter-
rain that may upset your balance.
As you travel across a slope, lean your body in
the uphill direction. It may be necessary to cor-
rect 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.
5TG-9-62 7 5/12/05 4:29 PM Page 204

8-9
INITIAL EVERY
month 1 3 6 6 12
ITEM ROUTINEWhichever
km 320 1200 2400 2400 4800 comes first
(mi) (200) (750) (1500) (1500) (3000)
hours 20 75 150 150 300
9Check operation.
Steering system*9Repair if damaged.
22222
9Check toe-in.
9Adjust if necessary.
Engine oil9Replace (Warm engine before draining).2 222
Engine oil filter
9Replace.222
element
9Check coolant leakage.
Cooling system9Repair if necessary.22222
9Replace coolant every 24 months.
9Check operation.
Lights and switches*
9
Adjust headlight beams.22222
5TG-9-62 8 5/13/05 1:48 PM Page 8-9

8-55
EBU14142
Spark plug inspection
Removal
1. Remove the seat. (See page 4-27 for seat
removal and installation procedures.)
2. Remove the bolts and the quick fastener
screws.
3. Remove the fuel tank cap by turning it
counterclockwise.
w
8Always turn off the engine when removing
the fuel tank cap.
8Do not remove the fuel tank cap immedi-
ately after the engine has been running
and is still very hot.
8Do not spill gasoline on the engine,
exhaust pipe or muffler.
8Never remove the fuel tank cap while
smoking, or in the vicinity of sparks, open
flames, or other sources of ignition such
as the pilot lights of water heaters and
clothes dryers.
1. Panel 2. Bolt (×2)
3. Quick fastener screw (×2) 4. Fuel tank cap
1. Cache 2. Boulon (×2)
3. Vis à serrage rapide (×2)
4. Bouchon du réservoir de carburant
1. Panel 2. Perno (×2)
3. Perno del fijador rápido (×2)
4. Tapón del depósito de combustible
5TG-9-62 8 5/13/05 1:48 PM Page 8-55

8-59
8. Use the spark plug wrench in the owner’s
tool kit to remove the spark plug as shown.
Inspection
The spark plug is an important engine compo-
nent 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 an 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 electrode erosion becomes excessive, or if
carbon and other deposits are excessive, you
should replace the spark plug with the specified
plug.
1. Spark plug wrench1. Clé à bougie1. Llave de bujía
5TG-9-62 8 5/13/05 1:48 PM Page 8-59

8-101
EBU08330
Adjusting the rear brake light switch
The rear brake light switch, which is activated by
the brake pedal and brake lever, is properly
adjusted when the brake light comes on just
before braking 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 adjusting nut in direction b.
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
5TG-9-62 9-11 5/12/05 6:14 PM Page 8-101

8-137
EBU14170
Replacing a headlight bulb
If a headlight bulb burns out, replace it as fol-
lows.
1. Remove the headlight assembly by remov-
ing the bolts.
2. Disconnect the headlight coupler.
3. Remove the headlight bulb holder cover.
1. Headlight assembly 2. Bolt (×2)1. Bloc de phare 2. Boulon (×2)1. Conjunto faro 2. Perno (×2)
1. Headlight bulb holder cover 2. Headlight coupler
1. Cache de la fixation d’ampoule de phare
2. Coupleur de phare
1. Cubierta del portabombillas del faro
2. Acoplador del faro
5TG-9-62 9-11 5/12/05 6:14 PM Page 8-137

8-139
4. Push the headlight bulb holder in and turn
it counterclockwise to remove.
5. Remove the defective bulb and replace it
with a new bulb.
w
Do not touch a headlight bulb when it is on
or immediately after it is turned off. You can
be burned or a fire could start if the bulb
touches something flammable. Wait for the
bulb to cool before touching or removing it.
cC
Do not touch the glass part of the headlight
bulb to keep it free from oil, otherwise the
transparency of the glass, the luminosity of
the bulb, and the bulb life will be adversely
affected. Thoroughly clean off any dirt and
fingerprints on the headlight bulb using a
cloth moistened with alcohol or thinner.
1. Headlight bulb holder1. Fixation d’ampoule de phare1. Portabombillas del faro
1. Do not touch the glass part of the bulb.
1. Ne pas toucher le verre de l’ampoule.1. Ne tocar la parte de cristal de la bombilla.
5TG-9-62 9-11 5/12/05 6:14 PM Page 8-139