2005 YAMAHA YFZ450 battery

Brake pedal, brake lever and
clutch lever lubrication.................... 8-113
Front upper and lower arm pivot
lubrication ....................................... 8-117
Rear arm pivot lubrication ................ 8-119
Wheel removal ................................. 8-121
Wheel installation ............................. 8-123
Battery .............................................. 8-125
Battery maintenance ........................ 8-129
Fuse replacement............................. 8-131
Replacing a headlight bulb ............... 8-133
Headlight beam adjustment.............. 8-139
Tail/brake light bulb replacement ..... 8-141
Troubleshooting................................ 8-143
Troubleshooting chart....................... 8-147
CLEANING AND STORAGE ................... 9-1
A. Cleaning ........................................... 9-1
B. Storage ............................................ 9-7
SPECIFICATIONS ................................ 10-1
CONVERSION TABLE .......................... 11-1
91011U5TG61.book Page 3 Friday, April 2, 2004 11:28 AM

6-7
6. Completely close the throttle lever and start
the engine by pushing the start switch.NOTE:_ If the engine fails to start, release the start switch,
then push it again. Pause a few seconds before
the next attempt. Each cranking should be as short
as possible to preserve battery energy. Do not
crank the engine more than 10 seconds on each
attempt. _7. If the engine is started with the starter (choke)
in position
1, the starter (choke) should be
returned to position
2 to warm up the en-
gine. If the engine is started with the starter
(choke) in position
2, keep the starter
(choke) in this position to warm up the en-
gine.
8. Continue warming up the engine until it idles
smoothly and return the starter (choke) to po-
sition
3 before riding.CAUTION:_ See the “Engine break-in” section prior to op-
erating the engine for the first time. _
U5TG61.book Page 7 Friday, April 2, 2004 11:28 AM

8-125
EBU03810
Battery
This machine is equipped with a sealed-type bat-
tery. Therefore it is not necessary to check the
electrolyte or add distilled water in the battery. If
the battery seems to have discharged, consult a
Yamaha dealer.CAUTION:_ Do not try to remove the sealing caps of the
battery cells. You may damage the battery. _
U5TG61.book Page 125 Friday, April 2, 2004 11:28 AM

8-127
WARNING
_ Battery electrolyte is poisonous and danger-
ous, causing severe burns, etc. It contains sul-
furic acid. Avoid contact with skin, eyes or
clothing.
Antidote:
EXTERNAL: Flush with water.
INTERNAL: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten egg
or vegetable oil. Call a physician immediately.
EYES: Flush with water for 15 minutes and get
prompt medical attention.
Batteries produce explosive gases. Keep
sparks, flame, cigarettes or other sources of
ignition away. Ventilate when charging or us-
ing in an enclosed space. Always shield your
eyes when working near batteries.
KEEP OUT OF REACH OF CHILDREN. _
U5TG61.book Page 127 Friday, April 2, 2004 11:28 AM

8-129 1. Negative battery lead 2. Positive battery lead
1. Câble négatif de batterie 2. Câble positif de batterie
1. Cable negativo de la batería 2. Cable positivo de la batería
EBU03850
Battery maintenance
1. When the machine is not used for a month or
longer, remove the battery and store it in a
cool, dark place. Completely recharge the
battery before reinstallation.CAUTION:_ A special battery charger (constant volt-
age/ampere or constant voltage) is required for
recharging a sealed-type battery. Using a con-
ventional battery charger may shorten the bat-
tery life. _2. Always make sure the connections are cor-
rect when putting the battery back in the ma-
chine.
U5TG61.book Page 129 Friday, April 2, 2004 11:28 AM

8-147
EBU07240Troubleshooting chart
Starting problems or poor engine performance1. Fuel
Check if there is fuel
in the fuel tank.There is fuel.Turn the fuel cock
lever to “OFF”.No fuel.Fuel cock is
clogged.
Clean the
fuel cock. Some fuel.Turn the fuel cock
lever to “RES”.Restart the engine.
No fuel.Supply fuel.
2. Compression
Use the electric
starter to see if
there is compression.There is compression.
Compression normal.
No compression.Ask a Yamaha dealer to
inspect.
3. Ignition
Remove the
spark plug and
check the electrodes.WetWipe clean with dry cloth.
DryAttach spark plug cap and
ground to chassis.Use the
electric starter.Spark is good.Ignition system is
normal.
Spark is weak.
Adjust the spark plug gap
or replace the spark plug. No spark.
Ask a Yamaha dealer to
inspect. 4. Battery
Use the electric starter.Engine turns over
quickly.Battery is good.
Engine turns over
slowly.Check the battery lead connections,
and charge the battery if necessary.Check the
fuel flow.
Turn the fuel cock
lever to “ON”.
Remove the fuel hose
from the fuel cock.
U5TG61.book Page 147 Friday, April 2, 2004 11:28 AM

9-9
5. Block up the frame to raise all wheels off the
ground.
6. Tie a plastic bag over the exhaust pipe outlet
to prevent moisture from entering.
7. If storing in a humid or salt-air atmosphere,
coat all exposed metal surfaces with a light
film of oil. Do not apply oil to any rubber parts
or the seat cover.
8. Remove the battery and charge it. Store it in
a dry place and recharge it once a month. Do
not store the battery in an excessively warm
or cold place (less than 0°C or more than
30°C).NOTE:_ Make any necessary repairs before storing the
machine. _
U5TG61.book Page 9 Friday, April 2, 2004 11:28 AM

10-5
Wheel travel:
Front
Rear230.0 mm
256.0 mm
Electrical:
Ignition system
Generator system
Battery type/voltage capacityDC-C.D.I.
A.C. magneto
GT7B-4/12 V, 6.5 Ah
Headlight type: Krypton bulb
Bulb voltage, wattage
× quantity:
Headlight
Tail/brake light
Indicator/warning lights:
Neutral
Coolant temperature12 V, 30 W/30.0 W
× 2
12 V, 5 W/21.0 W
× 1
12 V, 1.7 W
× 1
12 V, 1.7 W
× 1
Fuse: 15.0 AMODEL YFZ450
U5TG61.book Page 5 Friday, April 2, 2004 11:28 AM