2012 YAMAHA WR 250X radiator cap

PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
2
3
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567
8
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3. If the coolant is at or below the
minimum level mark, remove pan-
el C (See page 6-8.), remove the
coolant reservoir cap, add coolant
to the maximum level mark, and
then install the reservoir cap and
the panel. WARNING! Remove
only the coolant reservoir cap.
Never attempt to remove the ra-
diator cap when the engine is
hot.
[EWA15161]
NOTICE: If coolant is
not available, use distilled water
or soft tap water instead. Do not
use hard water or salt water
since it is harmful to the engine.
If water has been used instead of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10472]

EAU45155
To change the coolant
1. Place the vehicle on a level sur- face and let the engine cool if nec-
essary.
2. Remove panels A and C. (See page 6-8.)
3. Place a container under the engine to collect the used coolant.
4. Remove the radiator cap retaining bolt and radiator cap. WARNING!
Never attempt to remove the ra-
diator cap when the engine is
hot.
[EWA10381]

5. Remove the coolant reservoir by removing the bolts.
1. Maximum level mark
2. Minimum level mark
1
2
1. Coolant reservoir capCoolant reservoir capacity (up to the
maximum level mark): 0.25 L (0.26 US qt, 0.22 Imp.qt)
1
1. Radiator cap
2. Radiator cap retaining bolt
2
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-16
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96. Remove the coolant reservoir cap.
7. Drain the coolant from the coolant
reservoir by turning it upside down.
8. Install the coolant reservoir by placing it in the original position, and then installing the bolts.
9. Remove the coolant drain bolt and its gasket to drain the cooling sys-
tem.
10. After the coolant is completely drained, thoroughly flush the cool-
ing system with clean tap water.
11. Install the coolant drain bolt and its new gasket, and then tighten the
bolt to the specified torque.
12. Pour the specified amount of the recommended coolant into the ra- diator and reservoir.
13. Install the coolant reservoir cap.
14. Install the radiator cap.
15. Start the engine, let it idle for sev- eral minutes, and then turn it off.
16. Remove the radiator cap to check the coolant level in the radiator. If
necessary, add sufficient coolant
until it reaches the top of the radia-
tor, and then install the radiator
cap and its retaining bolt.
17. Check the coolant level in the res- ervoir. If necessary, remove the
coolant reservoir cap, add coolant
to the maximum level mark, and
then install the cap.
1. Bolt
2. Coolant reservoir
1. Coolant reservoir cap
1 2
1
1. Coolant drain bolt
2. GasketTightening torque:
Coolant drain bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
1
2
Antifreeze/water mixture ratio:
1:1
Recommended antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibitors
for aluminum engines
Coolant quantity: Radiator capacity (including all
routes):0.90 L (0.95 US qt, 0.79 Imp.qt)
Coolant reservoir capacity (up to the
maximum level mark): 0.25 L (0.26 US qt, 0.22 Imp.qt)
32D-9-E9-E0.book 16 ページ ２０１１年６月２９日　水曜日　午前１１時３４分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-44
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9Engine overheating
WARNING
EWA10400

Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.

After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the hissingsound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
TIPIf coolant is not available, tap water can be temporarily us
ed instead, provided that it is changed to the recommended coolantas 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 checkand 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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8-1
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5
6
789
SPECIFICATIONS
EAU50915
Dimensions:Overall length: 2115 mm (83.3 in)
Overall width: 810 mm (31.9 in)
Overall height: 1190 mm (46.9 in)
Seat height:
895 mm (35.2 in)
Wheelbase: 1425 mm (56.1 in)
Ground clearance: 265 mm (10.43 in)
Minimum turning radius:
2300 mm (90.6 in)Weight:Curb weight: 136 kg (300 lb)Engine:Engine type: Liquid cooled 4-stroke, DOHC
Cylinder arrangement: Single cylinder
Displacement:
250 cm
3
Bore  stroke:
77.0  53.6 mm (3.03  2.11 in)
Compression ratio: 11.80 : 1
Starting system:
Electric starter
Lubrication system: Wet sump
Engine oil:Recommended brand:
YAMALUBE
Type: SAE 10W-30, 10W-40, 10W-50, 15W-40,
20W-40 or 20W-50
Recommended engine oil grade: API service SG type or higher, JASO stan-
dard MA
Engine oil quantity: Without oil filter element replacement:
1.30 L (1.37 US qt, 1.14 Imp.qt)
With oil filter element replacement: 1.40 L (1.48 US qt, 1.23 Imp.qt)Cooling system:Coolant reservoir capacity (up to the maxi-
mum level mark): 0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator capacity (including all routes): 0.90 L (0.95 US qt, 0.79 Imp.qt)Air filter:Air filter element:
Wet element
Fuel:Recommended fuel: Premium unleaded gasoline only
Fuel tank capacity: 8.0 L (2.11 US gal, 1.76 Imp.gal)
Fuel reserve amount: 2.1 L (0.55 US gal, 0.46 Imp.gal)Fuel injection:Throttle body:ID mark:
3D71 10Spark plug(s):Manufacturer/model: NGK/CR9EK
Spark plug gap:
0.6 –0.7 mm (0.024 –0.028 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction ratio: 3.120 (78/25)
Final drive: Chain
Secondary reduction ratio:
3.231 (42/13)
Transmission type: Constant mesh 6-speed
Operation: Left foot operation
–20 –10 0 1020 30 40 50 C
10 30 50 70 90 110
0 130 F
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
32D-9-E9-E0.book 1 ページ ２０１１年６月２９日　水曜日　午前１１時３４分