2006 YAMAHA YFZ450 cooling

Lights ................................................ 5-29
Switches ........................................... 5-29
OPERATION ........................................ 6-1
Starting a cold engine ......................... 6-3
Starting a warm engine ...................... 6-9
Warming up ........................................ 6-9
Shifting ............................................. 6-11
To start out and accelerate ............... 6-13
To decelerate ................................... 6-17
Engine break-in ................................ 6-19
Parking ............................................. 6-23
Parking on a slope ............................ 6-25
Accessories and loading .................. 6-29
RIDING YOUR ATV .............................. 7-1
GETTING TO KNOW YOUR ATV ...... 7-3
RIDE WITH CARE AND GOOD
JUDGEMENT ................................... 7-5
BE CAREFUL WHERE YOU RIDE ... 7-27
TURNING YOUR ATV ...................... 7-41CLIMBING UPHILL .......................... 7-47
RIDING DOWNHILL ......................... 7-57
CROSSING A SLOPE .......................7-61
CROSSING THROUGH SHALLOW
WATER .......................................... 7-65
RIDING OVER ROUGH TERRAIN ....7-69
SLIDING AND SKIDDING .................7-71
WHAT TO DO IF ... ...........................7-75
WHAT TO DO ... .............................. 7-75
PERIODIC MAINTENANCE AND
ADJUSTMENT ................................... 8-1
Owner’s manual and tool kit ............... 8-3
PERIODIC MAINTENANCE/
LUBRICATION .................................. 8-7
Panel removal and installation ......... 8-19
Engine oil and oil filter element ........ 8-25
Cooling system ................................. 8-43
Changing the coolant ....................... 8-47
Spark plug inspection ....................... 8-55
Air filter element cleaning ................. 8-67
6
7
8
5TG-9-62 1-3 5/13/05 10:06 AM Page 13

6-21
0-10 hours:
Avoid continuous operation above half throttle.
Allow a cooling off period of five to ten minutes
after every hour of operation. Vary the speed of
the machine from time to time. Do not operate it
at one set throttle position.
10-20 hours:
Avoid prolonged operation above 3/4 throttle.
Rev the machine freely through the gears but do
not use full throttle at any time.
After break-in:
Avoid prolonged full throttle operation. Vary
speeds occasionally.
5TG-9-62 5-6 5/13/05 1:45 PM Page 6-21

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

8-43
EBU10151
Cooling system
1. Check the coolant level in the coolant
reservoir when the engine is cold as the
coolant level will vary with engine tempera-
ture.
NOTE:
The coolant should be between the minimum
and maximum level marks.
2. If the coolant is at or below the minimum
level mark, remove the coolant reservoir
cap, and then add coolant or distilled water
to raise it to the specified level.
cC
Hard water or salt water is harmful to the
engine. You may use soft water if you can’t
get distilled water.
Coolant reservoir capacity
(up to the maximum level mark):
0.25 L
1. Maximum level mark 2. Minimum level mark
3. Coolant reservoir 4. Coolant reservoir cap
1. Repère maximum 2. Repère minimum
3. Vase d’expansion
4. Bouchon du vase d’expansion
1. Marca de máximo 2. Marca de mínimo
3. Depósito de refrigerante
4. Tapa del depósito de refrigerante
5TG-9-62 8 5/13/05 1:48 PM Page 8-43

8-49
5. Remove the coolant reservoir by removing
the bolts.
6. Remove the coolant reservoir cap, and
then turn the coolant reservoir upside
down to empty it.
7. After draining the coolant, thoroughly flush
the cooling system with clean tap water.
8. Install the coolant reservoir by installing the
bolts.
9. Replace the coolant drain bolt washer if it
is damaged, and then tighten the coolant
drain bolt to the specified torque.
10. Pour the recommended coolant into the
radiator until it is full.
11. Pour the recommended coolant into the
coolant reservoir to the maximum level
mark.
1. Coolant reservoir cap
2. Coolant reservoir 3. Bolt (×2)
1. Bouchon de vase d’expansion
2. Vase d’expansion 3. Boulon (×2)1. Tapa del depósito de refrigerante
2. Depósito de refrigerante 3. Perno (×2)
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m0kgf)
5TG-9-62 8 5/13/05 1:48 PM Page 8-49

8-53
cC
Hard water or salt water is harmful to the
engine. You may use soft water if you cannot
get distilled water.
12. Install the radiator cap and the coolant
reservoir cap.
13. Start the engine and let it idle for several
minutes. Stop the engine, and then check
the coolant level in the radiator. If it is low,
add more coolant until it reaches the top of
the radiator.
14. Check the coolant level in the reservoir. If it
is low, add coolant to the maximum level
mark.
15. Start the engine and then check for coolant
leakage.
NOTE:
If any leakage is found, have a Yamaha dealer
check the cooling system.
16. Install the panel.
5TG-9-62 8 5/13/05 1:48 PM Page 8-53

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.
5TG-9-62 9-11 5/12/05 6:14 PM Page 8-150

10-3
Model YFZ450V
Cooling system:
Radiator capacity (Including all routes) 1.30 L
Coolant reservoir capacity
(Up to the maximum level mark) 0.29 L
Air filter: Wet type element
Fuel:
Type PREMIUM UNLEADED GASOLINE ONLY
For Europe:
PREMIUM UNLEADED GASOLINE ONLY with
a research octane number of 97 or higher
Tank capacity 10.0 L
Reserve amount 1.9 L
Carburetor:
Type ×quantity FCR39H ×1
Manufacturer KEIHIN
Spark plug:
Type/manufacturer CR8E/NGK
Spark plug gap 0.7–0.8 mm
Clutch :
Type Wet, multiple-disc
Operation Left hand operation
5TG-9-62 9-11 5/12/05 6:14 PM Page 10-3