2003 YAMAHA YFM660R coolant reservoir

3-1
EBU00032
DESCRIPTION AND MACHINE
IDENTIFICATION1. Seat
2. Fuel tank cap
3. Engine oil tank
4. Brake pedal
5. Headlights
6. Fuel cock
7. Throttle stop screw
8. Coolant reservoir
9. Tail/brake light10. Shift pedal
11. Clutch lever
12. Handlebar switches
13. Parking brake
14. Main switch
15. Reverse knob
16. Throttle lever
17. Brake leverNOTE:The machine you have purchased may differ
slightly from those shown in the figures of this
manual.
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5-1
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Front brakeCheck operation, free play, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5–5-7,
8-61–8-69
Rear brakeCheck operation, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5–5-7,
8-61–8-67, 8-71
ClutchCheck operation, condition and lever free play. 8-79
Parking brakeCheck operation, condition and cable length. 8-73–8-75
FuelCheck fuel level.
Fill with fuel if necessary.5-9–5-11
Engine oilCheck oil level.
Fill with oil if necessary.5-13–5-15,
8-17–8-31
Coolant reservoirCheck coolant level.
Fill with coolant if necessary.5-17–5-19,
8-33–8-41
Drive chainCheck chain slack and condition.
Adjust if necessary.5-19, 8-81–8-87
ThrottleCheck for proper throttle cable operation and free play. 5-21, 8-57
Wheels and tiresCheck tire pressure, wear and damage.5-23–5-29,
8-97–8-99
Fittings and fastenersCheck all fittings and fasteners. 5-21
Lights and switchesCheck for proper operation.5-21, 8-77,
8-109–8-119
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5-17
EBU01244
Coolant
Check the coolant level in the coolant reservoir
when the engine is cold. (The coolant level will
vary with engine temperature.) The coolant level is
satisfactory if it is between the upper and lower
level marks on the coolant reservoir. If the coolant
level is at or below the lower level mark, add tap
water (soft water) to bring the level up to the upper
level mark. Change the coolant every two years.
(See pages 8-33–8-41 for details.)CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use distilled water if you cannot
get soft water. _
Coolant reservoir capacity:
0.29 L
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8-33 1. Coolant reservoir cap
2. Maximum level mark
3. Minimum level mark
1. Bouchon du vase d’expansion
2. Repère de niveau maximum
3. Repère de niveau minimum
1. Tapa del depósito de líquido refrigerante
2. Marca de nivel máximo
3. Marca de nivel mínimo
EBU01015
Cooling system
1. Check the coolant level in the coolant reser-
voir when the engine is cold as the coolant
level will vary with engine temperature. The
coolant level should be between the maxi-
mum and minimum marks.
2. If the level is low, remove the coolant reser-
voir cap, and then add coolant or distilled wa-
ter to raise it to the specified level.CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use soft water if you can’t get
distilled water. _NOTE:_

If water is added, have a Yamaha dealer
check the antifreeze content of the coolant as
soon as possible.


The radiator fan operation is completely auto-
matic. It is switched on or off according to the
coolant temperature in the radiator.
_If your ATV overheats, see page 8-124 for details.Coolant reservoir capacity:
0.29 L
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8-37 1. Coolant reservoir cap
2. Hose
1. Bouchon du vase d’expansion
2. Flexible
1. Tapa del depósito de refrigerante
2. Manguera
5. Remove the coolant reservoir cap.
6. Disconnect the hose on the coolant reservoir
side, and then drain the coolant from the
coolant reservoir.
7. After draining the coolant, thoroughly flush
the cooling system with clean tap water.
8. Replace the coolant drain bolt washer if it is
damaged, and then tighten the coolant drain
bolt to the specified torque.
9. Install the coolant reservoir hose.
10. Pour the recommended coolant into the radi-
ator until it is full.
11. Fill the coolant reservoir with coolant up to
the maximum level. Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m·kgf)
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8-39
Recommended antifreeze:
High quality ethylene glycol antifreeze
containing corrosion inhibitors for
aluminum engines.
Antifreeze and water mixing ratio:
1:1
Total amount:
1.3 L
Coolant reservoir capacity:
0.29 L
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8-41
CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use soft water if you cannot get
distilled water. _12. Install the radiator cap and the coolant reser-
voir cap.
13. Start the engine and let it idle for several min-
utes. 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 ra-
diator.
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.
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8-124
Engine overheatingNOTE: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.
WARNING
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.
U5LP62.book Page 124 Wednesday, May 8, 2002 11:24 AM