2006 YAMAHA YFZ450 engine

8-115
EBU05700
Cable inspection and lubrication
w
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the outer
covering of control cables becomes dam-
aged. Cables can also become frayed or
kinked. Operation of controls could be
restricted, which could cause an accident or
injury.
Lubricate the inner cables and the cable ends. If
the cables do not operate smoothly, ask a
Yamaha dealer to replace them.
Recommended lubricant:
Engine oil
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8-149
EBU07240
Troubleshooting chart
Starting problems or poor
engine performance
2. Compression
Use the electric
starter to see if there
is compression.
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 weak.
Spark good.Ignition system normal.
No spark.
Ask a Yamaha dealer to inspect.
Adjust the spark plug gap
or replace the spark plug.
There is compresson.Compression normal.
Ask a Yamaha dealer to inspect.No compression.
4. Battery
Use the electric
starter
Engine turns over
quickly.Battery is good.
Check the connections, and charge the battery if necessary.Engine turns over
slowly
Check the fuel
flow.
1. Fuel
Check if there is
fuel in the fuel
tank.
There is fuel.Turn the fuel
cock to “OFF”.
Remove the
fuel hose from
the fuel cock.Turn the fuel cock
lever to “ON”.No fuel.Fuel cock clogged.
Some fuel.Turn the fuel cock
lever to “RES”.Restart the engine.
No fuel.Supply fuel.
Clean the fuel
cock.
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8-150
Engine overheating
NOTE:
If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is
changed to the recommended coolant as soon as possible.
w
Wait 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.
Wait until the
engine has cooled.Check the coolant level in the
reservoir tank and/or radiator.
Level is OK.
Level is low, check the
cooling system for leakage.
No
leakage.
Leakage.Ask a Yamaha dealer
to inspect and repair
the cooling system.
Add coolant.
(See NOTE.)
Restart the engine. If the engine overheats
again, ask a Yamaha dealer to inspect and/or
repair the cooling system.
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9-1
EBU04180
CLEANING AND STORAGE
A. CLEANING
Frequent, thorough cleaning of your machine
will not only enhance its appearance but will
improve its general performance and extend the
useful life of many components.
1. Before cleaning the machine:
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 degreaser to the chain, sprockets or
wheel axles.
3. Rinse the dirt and degreaser off with a gar-
den hose. Use only enough pressure to do
the job.
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9-5
8. 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 protective finish.
When finished, start the engine and let it
idle for several minutes.
w
Wet brakes may have reduced stopping abili-
ty, increasing the chance of an accident.
Test the brakes after washing. Apply the
brakes several times at slow speeds to let
friction dry out the linings.
5TG-9-62 9-11 5/12/05 6:14 PM Page 9-5

9-7
EBU05260
B. STORAGE
Long term storage (60 days or more) of your
machine will require some preventive proce-
dures to guard against deterioration. After thor-
oughly cleaning the machine, prepare for stor-
age as follows:
1. Fill the fuel tank with fresh fuel and add
fuel stabilizer (if available).
NOTE:
Use of fuel stabilizer eliminates the need to
drain the fuel system. Consult a Yamaha dealer
if the fuel system is to be drained instead.
2. Remove the spark plug, pour about one
tablespoon of SAE 10W30 or 20W40
motor oil in the spark plug hole and rein-
stall the spark plug. Ground the spark plug
wire and turn the engine over several times
to coat the cylinder wall with oil.
3. Clean the drive chain thoroughly and lubri-
cate it. (See page 8-111.)
5TG-9-62 9-11 5/12/05 6:14 PM Page 9-7

10-1
Model YFZ450V
Dimension:
Overall length 1,840 mm
Overall width 1,170 mm
Overall height 1,090 mm
Seat height 810 mm
Wheel base 1,280 mm
Ground clearance 255 mm
Minimum turning radius: 3,500 mm
Basic weight:
With oil and full fuel tank 169 kg
Engine:
Type Liquid cooled, 4-stroke, DOHC
Cylinder arrangement Forward-inclined single cylinder
Displacement 449.0cm
3
Bore ×Stroke 95.0 ×63.4 mm
Compression ratio 11.20 : 1
Starting system Electric starter
Lubrication system Dry sump
EBU04280
SPECIFICATIONS
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10-2
ModelYFZ450V
Engine oil:
Type
Recommended engine oil classification: API Service SE, SF, SG type or higher
cC
In order to prevent clutch slippage (since the
engine oil also lubricates the clutch), do not mix
any chemical additives. Do not use oils with a
diesel specification of “CD” or oils of a higher
quality than specified. In addition, do not use oils
labeled “ENERGY CONSERVING
II” or higher.
Quantity:
Without oil filter element replacement 1.75 L
With oil filter element replacement 1.85 L
–20° 10° 20° 30° 40°
10W30
10W40
20W40
20W5050°C
0° –10°
5W30
15W40
10
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