2007 YAMAHA WR 250F cooling

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GEN
INFO
SPECIAL TOOLS
SPECIAL TOOLS
The proper special tools are necessary for complete and accurate tune-up and assembly. Using the correct special tool
will help prevent damage caused by the use of improper tools or improvised techniques. The shape and part number used
for the special tool differ by country, so two types are provided. Refer to the list provided to avoid errors when placing an
order.
NOTE:For U.S.A. and Canada, use part number starting with “YM-”, “YU-” or “ACC-”.
For others, use part number starting with “90890-”.
Part number Tool name/How to use Illustration
YU-1135-A, 90890-01135 Crankcase separating tool
These tool is used to remove the crankshaft from
either case.
YU-3097, 90890-01252
YU-1256Dial gauge and stand
Stand
These tools are used to check each part for runout or
bent.
YU-90050, 90890-01274
YU-90050, 90890-01275
YM-91044, 90890-04081
YU-90063, 90890-01278Crankshaft installing tool
Crankshaft installing pot
Crankshaft installing bolt
Spacer (crankshaft installer)
Adapter (M12)
These tools are used to install the crankshaft.
YU-1304, 90890-01304 Piston pin puller set
This tool is used to remove the piston pin.
YU-24460-01, 90890-01325
YU-33984, 90890-01352Radiator cap tester
Radiator cap tester adapter
These tools are used for checking the cooling
system.
YU-33975, 90890-01403 Steering nut wrench
This tool is used when tighten the steering ring nut to
specification.
YM-01494, 90890-01494 Damper rod holder
Use this tool to remove and install the damper rod.
YM-A0948, 90890-01502 Fork seal driver
This tool is used when install the fork oil seal.90890-01135
90890-01304
90890-01325
90890-01352
YM-0149490890-01494
YM-A094890890-01502

MAINTENANCE SPECIFICATIONS
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SPEC
Lubrication system:
Oil filter type Paper type ----
Oil pump type Trochoid type ----
Tip clearance 0.12 mm or less
(0.0047 in or less)0.20 mm
(0.008 in)
Side clearance 0.09 ~ 0.17 mm
(0.0035 ~ 0.0067 in)0.24 mm
(0.009 in)
Housing and rotor clearance 0.03 ~ 0.10 mm
(0.0012 ~ 0.0039 in)0.17 mm
(0.0067 in)
Cooling:
Radiator core size
Width 120.2 mm (4.73 in) ----
Height 240 mm (9.45 in) ----
Thickness 22 mm (0.87 in) ----
Radiator cap opening pressure 110 kPa (1.1 kg/cm
2, 15.6 psi) ----
Radiator capacity (total) 0.54 L (0.48 Imp qt, 0.57 US qt) ----
Water pump
Type Single-suction centrifugal pump ----Item Standard Limit

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INSP
ADJ
MAINTENANCE INTERVALS
ROTOR NUT
Retighten
MUFFLER
Inspect and retighten
Clean
Replace
CRANK
Inspect and clean
CARBURETOR
Inspect, adjust and clean
AIR INDUCTION SYSTEM
Inspect and clean
SPARK PLUG
Inspect and clean
Replace
DRIVE CHAINUse chain lube
Chain slack:
48 ~ 58 mm (1.9 ~ 2.3 in) Lubricate, slack, alignment
Replace
COOLING SYSTEM
Check coolant level and leakage
Check radiator cap operation
Replace coolantEvery two years
Inspect hoses
OUTSIDE NUTS AND BOLTS Refer to “STARTING AND
BREAK-IN” section in the
CHAPTER 1. Retighten
AIR FILTER
Clean and lubricate Use foam air-filter oil or
equivalent oil
Replace
OIL FILTER
Replace
OIL STRAINER
Clean
FRAME
Clean and inspect
FUEL TANK, COCK
Clean and inspect
BRAKES
Adjust lever position and pedal height
Lubricate pivot point
Check brake disc surface
Check fluid level and leakage
Retighten brake disc bolts, caliper bolts,
master cylinder bolts and union bolts
Replace pads
Replace brake fluid Every one yearItemAfter
break-inEvery
race
Every third
(or
500 km)Every fifth
(or
1,000 km)As
requiredRemarks
1
2
3
4
5
6
7

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INSP
ADJ
PRE-OPERATION INSPECTION AND MAINTENANCE
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice, make sure the machine is in good operating condition.
Before using this machine, check the following points.
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
CoolantCheck that coolant is filled up to the radiator cap.
Check the cooling system for leakage.P.3-35 ~ 41
FuelCheck that a fresh gasoline is filled in the fuel tank. Check the
fuel line for leakage.P.1-49
Engine oilCheck that the oil level is correct. Check the crankcase and
frame oil line for leakage.P.3-51 ~ 59
Gear shifter and clutchCheck that gears can be shifted correctly in order and that the
clutch operates smoothly.P.3-41 ~ 43
Throttle grip/HousingCheck that the throttle grip operation and free play are correctly
adjusted. Lubricate the throttle grip and housing, if necessary.P.3-43 ~ 45
Brakes Check the play of front brake and effect of front and rear brake. P.3-77 ~ 89
Drive chainCheck drive chain slack and alignment. Check that the drive
chain is lubricated properly.P.3-91 ~ 95
WheelsCheck for excessive wear and tire pressure. Check for loose
spokes and have no excessive play.P.3-111 ~ 113
SteeringCheck that the handlebar can be turned smoothly and have no
excessive play.P.3-113 ~ 117
Front forks and rear shock
absorberCheck that they operate smoothly and there is no oil leakage. P.3-97 ~ 109
Cables (wires)Check that the clutch and throttle cables move smoothly. Check
that they are not caught when the handlebars are turned or when
the front forks travel up and down.—
Exhaust pipeCheck that the exhaust pipe is tightly mounted and has no
cracks.P.3-27 ~ 31
Rear wheel sprocket Check that the rear wheel sprocket tightening bolt is not loose. P.3-89
Lubrication Check for smooth operation. Lubricate if necessary. P.3-119
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P.1-59
Lead connectorsCheck that the AC magneto, CDI unit, and ignition coil are
connected tightly.P.1-9
SettingsIs the machine set suitably for the condition of the course and
weather or by taking into account the results of test runs before
riding? Are inspection and maintenance completely done?P.4-1 ~ 40

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INSP
ADJ
COOLANT REPLACEMENT
WARNING
Do not remove the radiator cap
when the engine is hot.
CAUTION:
Take care so that coolant does not
splash on painted surfaces. If it
splashes, wash it away with water.
1. Place a container under the
engine.
2. Remove:
Seat
Left side cover
3. Remove the catch tank hose
from the catch tank and drain the
tank of its coolant.
4. Remove:
Coolant drain bolt
1
5. Remove:
Radiator cap
Drain the coolant completely.
6. Clean:
Cooling system
Thoroughly flush the cooling
system with clean tap water.
7. Install:
Copper washer
Coolant drain bolt
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
New
CHANGEMENT DU LIQUIDE DE
REFROIDISSEMENT
AVERTISSEMENT
Ne jamais enlever le bouchon de
radiateur quand le moteur est chaud.
ATTENTION:
Veiller à ne pas laisser échapper de
liquide de refroidissement sur les sur-
faces peintes. Si cela devait se pro-
duire, rincer à l’eau.
1. Placer un récipient sous le moteur.
2. Déposer:
Selle
Cache latéral gauche
3. Déposer la durit du réservoir de
récupération et vidanger le liquide
de refroidissement.
4. Déposer:
Boulon de vidange du liquide de
refroidissement 1
5. Déposer:
Bouchon du radiateur
Vidanger entièrement le liquide
de refroidissement.
6. Nettoyer:
Circuit de refroidissement
Rincer soigneusement le circuit
de refroidissement à l’eau claire.
7. Monter:
Rondelle en cuivre
Boulon de vidange du liquide de
refroidissement
T R..10 Nm (1,0 m · kg, 7,2 ft · lb)
New
ENGINE
MOTEUR

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INSP
ADJ
COOLING SYSTEM INSPECTION
1. Inspect:
Coolant level
2. Attach:
Radiator cap tester
1 and
adapter
2
3. Apply the specified pressure.
NOTE:Do not apply pressure more than
specified pressure.
Radiator should be filled fully.
Radiator cap tester:
YU-24460-01/
90890-01325
Radiator cap tester
adapter:
YU-33984/90890-01352
Standard pressure:
180 kPa
(1.8 kg/cm
2, 25.6 psi)
4. Inspect:
Pressure
Impossible to maintain the
specified pressure for 10 sec-
onds
→ Repair.
Radiator
1
Radiator hose joint
2
Coolant leakage
→ Repair or
replace.
Radiator hose
3
Swelling
→ Replace.
CLUTCH ADJUSTMENT
1. Check:
Clutch lever free play
a
Out of specification
→ Adjust.
Clutch lever free play a:
8 ~ 13 mm
(0.31 ~ 0.51 in)
CONTROLE DU CIRCUIT DE
REFROIDISSEMENT
1. Contrôler:
Niveau du liquide de refroidisse-
ment
2. Fixer:
Testeur de bouchon de radiateur
1 et adaptateur 2
3. Appliquer la pression spécifiée.
N.B.:
Ne pas appliquer de pression supé-
rieure à la pression spécifiée.
Le radiateur doit être entièrement rem-
pli.
Testeur de bouchon de
radiateur:
YU-24460-01/
90890-01325
Adaptateur du testeur de
bouchon de radiateur:
YU-33984/90890-01352
Pression standard:
180 kPa
(1,8 kg/cm
2, 25,6 psi)
4. Contrôler:
Pression
Impossible de maintenir la pres-
sion spécifiée pendant 10 secon-
des → Réparer.
Radiateur 1
Raccords du tuyau de radiateur
2
Fuite de liquide de refroidisse-
ment → Réparer ou remplacer.
Tuyau du radiateur 3
Gonflement → Remplacer.
REGLAGE DE L’EMBRAYAGE
1. Contrôler:
Jeu du levier d’embrayage a
Hors spécifications → Ajuster.
Jeu du levier d’embrayage
a:
8 à 13 mm (0,31 à 0,51 in)
ENGINE
MOTEUR