2006 YAMAHA WR 250F coolant

SPEC
2 - 103
CABLE ROUTING DIAGRAM
1Hot starter cable
2Throttle cable (return)
3Throttle cable (pull)
4Cable guide
5Ignition coil
6Coolant reservoir breather hose
7Coolant reservoir hose
8Clamp
9CDI unit lead
0CDI unit
ACDI unit band
BCDI unit stayÈPass the throttle cables and hot starter cable through the cable
guides.
ÉPass the throttle cables and hot starter cable between the radi-
ator and frame, then under the radiator mounting boss.
ÊPass the throttle cables on the outside of the ignition coil.
ËPass the carburetor breather hose (of the throttle cable cover)
through the hose holder.
ÌFasten the coolant reservoir breather hose and carburetor
breather hoses together.
A B
0
A
0
891
32
4
É
Ê
5
67
Ë ÌÎ
ÍÈ

SPEC
2 - 109
CABLE ROUTING DIAGRAM
1Starter motor lead
2Negative battery lead
3Wire harness
4Clamp
5Taillight lead
6Coolant reservoir breather hose
7Coolant reservoir hose
8Positive battery lead
9Starting circuit cut-off relay
0BatteryÈPosition the starter motor lead, negative battery lead and wire
harness in the tank damper slit.
ÉFasten the wire harness.
ÊFasten the coolant reservoir breather hose and coolant reser-
voir hose.
ËDo not allow the taillight lead to slacken.
ÌPass the coolant reservoir hose on the outside of the coolant
reservoir breather hose.
9
0 1
2 38
Ì 4Ê
764Ê4Ê
5Ë
4Ê
6
7
È32
1
4É
Zero ~ 10 mm
(Zero ~ 0.39 in)

3 - 2
INSP
ADJ
MAINTENANCE INTERVALS
ROTOR NUT
Retighten
EXHAUST PIPE, SILENCER,
PROTECTOR
Inspect and retighten
Clean
Replace* Whichever comes first
*SPARK ARRESTER
Clean
(Every
six
months)
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 (frame)
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

3 - 16
INSP
ADJ
PRE-OPERATION INSPECTION AND MAINTENANCE
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, 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.3-21 ~ 29
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.3-39 ~ 47
Gear shifter and clutchCheck that gears can be shifted correctly in order and that the
clutch operates smoothly.P.3-29 ~ 31
Throttle grip/HousingCheck that the throttle grip operation and free play are correctly
adjusted. Lubricate the throttle grip and housing, if necessary.P.3-31 ~ 33
Brakes Check the play of front brake and effect of front and rear brake. P.3-65 ~ 77
Drive chainCheck drive chain slack and alignment. Check that the drive
chain is lubricated properly.P.3-79 ~ 83
WheelsCheck for excessive wear and tire pressure. Check for loose
spokes and have no excessive play.P.3-99 ~ 101
SteeringCheck that the handlebar can be turned smoothly and have no
excessive play.P.3-101 ~ 103
Front forks and rear shock
absorberCheck that they operate smoothly and there is no oil leakage. P.3-85 ~ 97
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.4-7 ~ 11
Rear wheel sprocket Check that the rear wheel sprocket tightening bolt is not loose. P.3-77
Lubrication Check for smooth operation. Lubricate if necessary. P.3-105
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 racing course
and weather or by taking into account the results of test runs
before racing? Are inspection and maintenance completely
done?P.7-1 ~ 40

3 - 21
INSP
ADJ
EC350000
ENGINE
COOLANT LEVEL INSPECTION
WARNING
Do not remove the radiator cap 1,
drain bolt and hoses when the
engine and radiator are hot. Scald-
ing hot fluid and steam may be
blown out under pressure, which
could cause serious injury.
When the engine has cooled,
place a thick towel over the radia-
tor cap, slowly rotate the cap
counterclockwise to the detent.
This procedure allows any resid-
ual pressure to escape. When the
hissing sound has stopped, press
down on the cap while turning
counterclockwise and remove it.
CAUTION:
Hard water or salt water is harmful
to the engine parts. You may use
distilled water, if you can’t get soft
water.
1. Place the machine on a level
place, and hold it in an upright
position.
2. Inspect:
Coolant level
Coolant level should be
between the maximum
a and
minimum
b marks.
Coolant level is below the
“LOW” level line
→ Add soft
water (tap water) up to the
proper level.
3. Start the engine and let it warm
up for several minutes.
4. Turn off the engine and check
the coolant level again.
NOTE:Before checking the coolant level,
wait a few minutes until the coolant
settles.
LOWFULLCOOLANTa
b
MOTEUR
CONTROLE DU NIVEAU DU
LIQUIDE DE REFROIDISSEMENT
AVERTISSEMENT
Ne pas déposer le bouchon de radia-
teur 1
, le boulon de vidange et les
durits quand le moteur et le radiateur
sont chauds. Du liquide chaud et de la
vapeur risquent de jaillir sous forte
pression et de provoquer des brûlures
graves.
Quand le moteur s’est refroidi, placer
un chiffon épais sur le bouchon du
radiateur et tourner lentement ce der-
nier dans le sens inverse des aiguilles
d’une montre jusqu’au point de
détente. Ceci permet à la pression rési-
duelle de s’échapper. Quand le siffle-
ment s’arrête, appuyer sur le bouchon
tout en le faisant tourner dans le sens
inverse des aiguilles d’une montre
puis l’enlever.
ATTENTION:
L’eau calcaire ou salée est nuisible
pour les pièces du moteur. En
l’absence d’eau non calcaire, il est pos-
sible d’utiliser de l’eau distillée.
1. Placer la moto sur un sol plan et la
maintenir à la verticale.
2. Contrôler
Niveau du liquide de refroidisse-
ment
Le niveau du liquide de refroidis-
sement doit se situer entre les
repères de niveau maximum a et
minimum b.
Le niveau de liquide de refroidis-
sement est sous la ligne de niveau
“LOW” → Ajouter de l’eau
douce (eau du robinet) jusqu’au
niveau correct.
3. Mettre le moteur en marche et le
laisser chauffer pendant quelques
minutes.
4. Couper le moteur et vérifier à nou-
veau le niveau du liquide de refroi-
dissement.
N.B.:
Attendre quelques minutes que le liquide
de refroidissement se stabilise avant d’en
contrôler le niveau.
ENGINE
MOTEUR

3 - 23
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
Refer to “SEAT, FUEL TANK
AND SIDE COVERS” section
in the CHAPTER 4.
3. Disconnect:
Coolant reservoir hose
1
Drain the coolant completely.
4. Connect:
Coolant reservoir hose
LOWFULLCOOLANT1
5. Remove:
Engine guard
1
Coolant drain bolt
2
6. Remove:
Radiator cap
Drain the coolant completely.
7. Clean:
Cooling system
Thoroughly flush the cooling
system with clean tap water.
8. Install:
Copper washer
Coolant drain bolt
Engine guard
Bolt [engine guard (front)]
Bolt [engine guard (rear)]
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..34 Nm (3.4 m · kg, 24 ft · lb)
T R..23 Nm (2.3 m · kg, 17 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
Se reporter à la section “SELLE,
RESERVOIR DE CARBURANT
ET CACHES LATERAUX” au
CHAPITRE 4.
3. Déconnecter:
Durit du vase d’expansion 1
Vidanger entièrement le liquide
de refroidissement.
4. Connecter:
Durit du vase d’expansion
5. Déposer:
Protège-carter 1
Boulon de vidange du liquide de
refroidissement 2
6. Déposer:
Bouchon du radiateur
Vidanger entièrement le liquide
de refroidissement.
7. Nettoyer:
Circuit de refroidissement
Rincer soigneusement le circuit
de refroidissement à l’eau claire.
8. Monter:
Rondelle en cuivre
Boulon de vidange du liquide de
refroidissement
Protège-carter
Boulon [protège-carter (avant)]
Boulon [protège-carter (arrière)]
T R..10 Nm (1,0 m · kg, 7,2 ft · lb)
T R..34 Nm (3,4 m · kg, 24 ft · lb)
T R..23 Nm (2,3 m · kg, 17 ft · lb)
New
ENGINE
MOTEUR

3 - 25
INSP
ADJ
9. Fill:
Radiator
Engine
To specified level.
CAUTION:
Do not mix more than one type
of ethylene glycol antifreeze
containing corrosion inhibitors
for aluminum engine.
Do not use water containing
impurities or oil.
Recommended coolant:
High quality ethylene
glycol anti-freeze con-
taining anti-corrosion
for aluminum engine
Coolant 1 and water
(soft water) 2 mixing
ratio:
50%/50%
Coolant capacity:
0.9 L
(0.79 Imp qt,
0.95 US qt)
Handling notes of coolant:
The coolant is harmful so it should
be handled with special care.
WARNING
When coolant splashes to
your eye.
Thoroughly wash your eye
with water and see your doc-
tor.
When coolant splashes to
your clothes.
Quickly wash it away with
water and then with soap.
When coolant is swallowed.
Quickly make him vomit and
take him to a doctor.
10. Install:
Radiator cap
11. Fill:
Coolant reservoir tank
Midway
a between maximum
and minimum marks on the
tank.
LOWFULLCOOLANTa
9. Remplir:
Radiateur
Moteur
au niveau spécifié.
ATTENTION:
Ne pas mélanger différents types
d’antigel à l’éthylène glycol conte-
nant un agent anticorrosion pour
moteurs en aluminium.
Ne pas utiliser de l’eau contenant
des impuretés ou de l’huile.
Liquide de refroidissement
recommandé:
Antigel à l’éthylène gly-
col de haute qualité con-
tenant un agent anticor-
rosion pour moteurs en
aluminium
Rapport de mélange liquide
de refroidissement 1 et
eau (eau douce) 2:
50%/50%
Quantité de liquide de
refroidissement:
0,9 L
(0,79 Imp qt, 0,95 US qt)
Notes concernant la manipulation
du liquide de refroidissement:
Le liquide de refroidissement étant
dangereux, il doit être manipulé avec
une attention particulière.
AVERTISSEMENT
En cas de projection de liquide
de refroidissement dans les yeux:
rincer soigneusement les yeux à
l’eau et consulter un médecin.
En cas de projection de liquide
de refroidissement sur les vête-
ments:
rincer rapidement à l’eau claire
puis laver à l’eau savonneuse.
En cas d’ingestion de liquide de
refroidissement:
faire immédiatement vomir et
consulter un médecin dans les
plus brefs délais.
10. Monter:
Bouchon du radiateur
11. Remplir:
Vase d’expansion
A mi-hauteur a entre les repères
de niveau maximum et minimum
du réservoir.
ENGINE
MOTEUR

3 - 27
INSP
ADJ
12. Install:
Coolant reservoir cap
13. Start the engine and let it warm
up for several minutes.
14. Turn off the engine and inspect
the coolant level.
Refer to “COOLANT LEVEL
INSPECTION” section.
NOTE:Before checking the coolant level
wait a few minutes until the coolant
settles.
EC355000RADIATOR CAP INSPECTION
1. Inspect:
Seal (radiator cap)
1
Valve and valve seat
2
Crack/damage
→ Replace.
Exist fur deposits
3
→ Clean
or replace.
RADIATOR CAP OPENING
PRESSURE INSPECTION
1. Attach:
Radiator cap tester
1 and
adapter
2
NOTE:Apply water on the radiator cap seal.
3Radiator cap
2. Apply the specified pressure.
Radiator cap tester:
YU-24460-01/
90890-01325
Radiator cap tester
adapter:
YU-33984/90890-01352
Radiator cap opening
pressure:
110 kPa
(1.1 kg/cm
2, 15.6 psi)
12. Monter:
Bouchon du vase d’expansion
13. Mettre le moteur en marche et le
laisser chauffer pendant quelques
minutes.
14. Couper le moteur et vérifier le
niveau du liquide de refroidisse-
ment.
Se reporter à la section “CON-
TROLE DU NIVEAU DU
LIQUIDE DE REFROIDISSE-
MENT”.
N.B.:
Attendre quelques minutes que le liquide
de refroidissement se stabilise avant d’en
contrôler le niveau.
CONTROLE DU BOUCHON DE
RADIATEUR
1. Contrôler:
Joint (bouchon de radiateur) 1
Soupape et siège de soupape 2
Craquelures/endommagement →
Remplacer.
Dépôts de tartre 3 → Nettoyer
ou remplacer.
CONTROLE DE LA PRESSION
D’OUVERTURE DU BOUCHON DE
RADIATEUR
1. Fixer:
Testeur de bouchon de radiateur
1 et adaptateur 2
N.B.:
Mouiller le joint du bouchon de radiateur
à l’aide d’eau.
3
Bouchon de radiateur
2. Appliquer la pression spécifiée.
Testeur de bouchon de
radiateur:
YU-24460-01/
90890-01325
Adaptateur du testeur de
bouchon de radiateur:
YU-33984/90890-01352
Pression d’ouverture du
bouchon de radiateur:
110 kPa
(1,1 kg/cm
2, 15,6 psi)
ENGINE
MOTEUR