YAMAHA GRIZZLY 450 2009 Owners Manual

8-54
8 2. Remove the blown fuse, and then install a
new fuse of the specified amperage.
WARNING
EWB02171Always use a fuse of the specified rating, and
never use a substitute object in place of the
proper fuse. An improper fuse or a substitute
object can cause damage to the electrical sys-tem, which could lead to a fire.3. Turn the key to “ON” and turn on the electrical
circuits to check if the devices operate.
4. If the fuse immediately blows again, have a
Yamaha dealer check the electrical system.
EBU25480Replacing a headlight bulb If a headlight bulb burns out, replace it as follows.
1. Remove the cover at the rear of the headlight
by pulling it off.
2. Remove the headlight bulb holder cover by
pulling it off. Specified fuses:
Main fuse:
30.0 A
Headlight fuse:
15.0 A
Ignition fuse:
10.0 A
Four-wheel-drive motor fuse:
10.0 A
Signaling system fuse:
10.0 A
Auxiliary DC jack fuse:
10.0 A
Backup fuse:
10.0 A1. Cover at the rear of the headlight
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83. Remove the headlight bulb holder by pushing
it in and turning it counterclockwise.4. Remove the defective bulb by pulling it out.
WARNING
EWB02220A headlight bulb is hot when it is on and imme-
diately after it is turned off. Wait for the bulb to
cool before touching or removing it. You can
be burned or a fire could start if the bulb touch-es something flammable.
5. Insert a new headlight bulb into the bulb hold-
er by pushing it in.
1. Headlight bulb holder cover
1. Headlight bulb holder
1. Do not touch the glass part of the bulb.
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8
NOTICEECB00650Do 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 affect-
ed. Thoroughly clean off any dirt and finger-
prints on the headlight bulb using a clothmoistened with alcohol or thinner.
6. Install the bulb holder by pushing it in and turn-
ing it clockwise.
7. Install the bulb holder cover and the cover at
the rear of the headlight.NOTICEECB00670Make sure the headlight bulb holder cover is
securely fitted over the bulb holder and seatedproperly.
8. Adjust the headlight beam if necessary.EBU25551Adjusting a headlight beam NOTICEECB00690It is advisable to have a Yamaha dealer makethis adjustment.To raise a headlight beam, turn the headlight beam
adjusting screw in direction (a).
To lower a headlight beam, turn the adjusting
screw in direction (b).
EBU25620Replacing the tail/brake light bulb If the tail/brake light bulb burns out, replace it as
follows.
1. Remove the tail/brake light assembly by re-
moving the nuts together with the washers.1. Headlight beam adjusting screw
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82. Remove the bulb holder (together with the
bulb) by turning it counterclockwise.3. Remove the defective bulb by pushing it in
and turning it counterclockwise.
1. Tail/brake light assembly
2. Nut
1. Tail/brake light assembly
2. Tail/brake light bulb holder
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8 4. Insert a new bulb into the bulb holder, push it
in, and then turn it clockwise until it stops.
5. Install the bulb holder (together with the bulb)
by turning it clockwise.
6. Install the tail/brake light assembly by install-
ing the washers and the nuts.
EBU25651Removing a wheel 1. Place the ATV on a level surface.
2. Loosen the wheel nuts.3. Elevate the ATV and place a suitable stand
under the frame.
4. Remove the nuts from the wheel.
5. Remove the wheel.
EBU25701Installing a wheel 1. Place the ATV on a level surface.
2. Install the wheel and the nuts.TIP
The arrow mark on the tire must point toward
the rotating direction of the wheel.
1. Tail/brake light bulb holder
2. Tail/brake light bulb
1. Wheel nut
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8

Tapered nuts are used for both the front and rear
wheels. Install the nuts with their tapered side to-wards the wheel.
3. Lower the ATV to the ground.
4. Tighten the wheel nuts to the specified
torques.1. Arrow mark
1. Tapered nutTightening torques:
Fro nt wh ee l nu t:
55 Nm (5.5 m·kgf, 40 ft·lbf)
Rear wheel nut:
55 Nm (5.5 m·kgf, 40 ft·lbf)
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8
EBU25740Troubleshooting Although Yamaha ATVs receive a thorough in-
spection before shipment from the factory, trouble
may occur during operation. Any problem in the fu-
el, compression, or ignition systems, for example,
can cause poor starting and loss of power.
The following troubleshooting charts represent
quick and easy procedures for checking these vital
systems yourself. However, should your ATV re-
quire any repair, take it to a Yamaha dealer, whose
skilled technicians have the necessary tools, expe-
rience, and know-how to service the ATV properly.
Use only genuine Yamaha replacement parts. Im-
itation parts may look like Yamaha parts, but they
are often inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWB02280Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe inju-
ry or property damage. Make sure there are no
open flames or sparks in the area, including pi-lot lights from water heaters or furnaces.U37S60E0.book Page 60 Thursday, June 5, 2008 6:51 PM

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8
EBU25782Troubleshooting charts Starting problems or poor engine performance
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the ATV.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the ATV.
The engine does not start.
Have a Yamaha dealer
check the ATV.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
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8 Engine overheating
WARNING
EWB02290Wait for the engine and radiator to cool before removing the radiator cap. You could be burned by
hot fluid and steam blown out under pressure. Always put a thick rag over the cap when opening.Allow any remaining pressure to escape before completely removing the cap.TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the rec-ommended coolant as soon as possible.Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer check
and repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again, have a
Yamaha dealer check and repair the cooling system.
There is
leakage.
There is
no leakage.
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9
EBU25860
CLEANING AND STORAGE
EBU25880Cleaning Frequent, thorough cleaning of your ATV will not
only enhance its appearance but will improve its
general performance and extend the useful life of
many components.
1. Before cleaning the ATV:
a. Block off the end of the exhaust pipe to
prevent water entry. A plastic bag and
strong rubber band may be used.
b. Make sure the spark plug and all filler caps
are properly installed.
2. If the engine case is excessively greasy, apply
degreaser with a paint brush. Do not apply de-
greaser to the wheel axles.
3. Rinse the dirt and degreaser off with a garden
hose. Use only enough pressure to do the job.NOTICEECB00710Excessive water pressure may cause water
seepage and deterioration of wheel bearings,
brakes, transmission seals and electrical de-
vices. Many expensive repair bills have result-ed from improper high-pressure detergent
applications such as those available in coin-
operated car washers.
4. Once most of the dirt has been hosed off,
wash all surfaces with warm water and mild,
detergent-type soap. An old toothbrush or bot-
tle brush is handy for hard-to-reach places.
5. Rinse the ATV off immediately with clean wa-
ter and dry all surfaces with a chamois, clean
towel or soft absorbing cloth.
6. Clean the seat with a vinyl upholstery cleaner
to keep the cover pliable and glossy.
7. Automotive type wax may be applied to all
painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
abrasives which may mar the paint or protec-
tive finish. When finished cleaning, start the
engine and let it idle for several minutes.
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