2007 YAMAHA WR 250F fuel

2 - 101
SPECCABLE ROUTING DIAGRAM
EC240000
CABLE ROUTING DIAGRAM
1Fuel tank breather hose
2Clamp
3Diode
4Hot starter cable
5Wire harness
6Hump (frame)
7Cylinder head breather hose
8Throttle position sensor lead
9Neutral switch lead
0Oil hose
AClutch cable
BStarter motor lead
CCable guideDNegative battery lead
EAC magneto lead
FBrake hose
GRectifier/regulator lead
HCarburetor breather hose
ICarburetor overflow hose
JCatch tank breather hose

2 - 103
SPECCABLE ROUTING DIAGRAM
ÈInsert the end of the fuel tank breather hose into the hole in the
steering stem.
ÉFasten the throttle cable, hot starter cable and rectifier/regula-
tor lead onto the frame. Locate the clamp end facing the lower
side of the hot starter cable and cut off the tie end.
ÊFasten the diode (at the marking), throttle cable and hot starter
cable onto the frame. Locate the clamp end facing toward the
lower right of the frame and with the tie end facing downward.
ËFasten the wire harness, throttle position sensor lead, starter
motor lead and negative battery lead onto the frame. Pass the
clamp through the hole in the stay (air cut-off valve). Locate the
clamp end facing toward the lower side of the frame and cut off
the tie end.ÌFasten the throttle position sensor lead onto the frame. Locate
the clamp end facing toward the lower side of the frame and
cut off the tie end.
ÍPass the carburetor breather hoses, carburetor overflow hose
and catch tank breather hose between the connecting rod and
cross tube (frame).
ÎFasten the neutral switch lead and oil hose together with the
plastic locking ties and cut off the tie ends.
ÏFasten the neutral switch lead and AC magneto lead onto the
frame. Locate the clamp end facing toward the outside of the
frame and tie end facing toward the rear of the frame.

3 - 2
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

INSP
ADJ
3 - 21
EC350000
ENGINE
SEAT, FUEL TANK AND SIDE COVERS
Extent of removal:
1 Seat removal
2 Fuel tank removal
3 Side covers removal
4 Headlight removal
Extent of removal Order Part name Q’ty Remarks
SEAT, FUEL TANK AND SIDE COVERS
REMOVAL
Preparation for removal Turn the fuel cock to “OFF”.
Disconnect the fuel hose.
1Seat 1
2 Air scoop (left and right) 2
3 Bolt (fuel tank) 2
4 Fuel tank 1
5 Left side cover 1 Open the air filter case cover.
6 Right side cover 1 Refer to “REMOVAL POINTS”.
7 Headlight coupler 1
8 Headlight 1
2
13
4
3
ENGINE

INSP
ADJ
3 - 27
EC4S0000EXHAUST PIPE AND SILENCER
Extent of removal:
1 Silencer removal
2 Exhaust pipe removal
Extent of removal Order Part name Q’ty Remarks
EXHAUST PIPE AND SILENCER
REMOVAL
Preparation for removal Right side cover Refer to “SEAT, FUEL TANK AND SIDE COVERS”
section.
1 Bolt (silencer clamp) 1 Only loosening.
2 Bolt [silencer (front)] 1
3 Bolt [silencer (rear)] 1
4 Collar 1
5 Silencer 1
6 Silencer clamp 1
7 Nut (exhaust pipe) 2
8 Exhaust pipe 1
9 Gasket 2
1
2
2
ENGINE

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INSP
ADJ
VALVE CLEARANCE INSPECTION
AND ADJUSTMENT
NOTE:This section is intended for those
who have basic knowledge and skill
concerning the servicing of Yamaha
motorcycles (e.g., Yamaha dealers,
service engineers, etc.) Those who
have little knowledge and skill con-
cerning servicing are requested not
to undertake inspection, adjustment,
disassembly, or reassembly only by
reference to this manual. It may lead
to servicing trouble and mechanical
damage.
NOTE:The valve clearance should be
adjusted when the engine is cool to
the touch.
The piston must be at Top Dead
Center (T.D.C.) on compression
stroke to check or adjust the valve
clearance.
1. Remove:
Seat
Fuel tank
Refer to “SEAT, FUEL TANK
AND SIDE COVERS” section.
2. Drain:
Coolant
Refer to “COOLANT
REPLACEMENT” section.
3. Remove:
Right radiator
Refer to “RADIATOR” section
in the CHAPTER 5.
Carburetor
Refer to “CARBURETOR”
section in the CHAPTER 5.
Spark plug
Upper engine bracket
Cylinder head cover
Refer to “CAMSHAFTS” sec-
tion in the CHAPTER 5.
4. Remove:
Timing mark accessing screw
1
Crankshaft end accessing
screw
2
O-ring
INSPECTION ET REGLAGE DU
JEU AUX SOUPAPES
N.B.:
Cette section est destinée aux personnes
possédant des connaissances et des com-
pétences de base pour l’entretien des
motos Yamaha (par ex.: concessionnai-
res Yamaha, techniciens d’entretien,
etc.). Les personnes non qualifiées ne
doivent entreprendre les opérations
d’inspection, de réglage, de démontage
ou de remontage que s’ils se réfèrent à ce
manuel. Sinon, ils pourraient engendrer
des problèmes d’entretien et des domma-
ges mécaniques.
N.B.:
Le jeu aux soupapes doit être réglé
quand le moteur est froid au toucher.
Le piston doit être au point mort haut
(PMH) de la course de compression
pour permettre le contrôle ou le
réglage du jeux aux soupapes.
1. Déposer:
Selle
Réservoir de carburant
Se reporter à la section “SELLE,
RESERVOIR DE CARBURANT
ET CACHES LATERAUX”.
2. Vidanger:
Liquide de refroidissement
Se reporter à la section “CHAN-
GEMENT DU LIQUIDE DE
REFROIDISSEMENT”.
3. Déposer:
Radiateur droit
Se reporter à la section “RADIA-
TEUR” au CHAPITRE 5.
Carburateur
Se reporter à la section “CARBU-
RATEUR” au CHAPITRE 5.
Bougie
Support de moteur supérieur
Couvre-culasse
Se reporter à la section
“ARBRES A CAMES” au CHA-
PITRE 5.
4. Déposer:
Vis d’accès de repère d’allumage
1
Vis d’accès axiale du vilebrequin
2
Joint torique
ENGINE
MOTEUR

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INSP
ADJ
Loosen the steering ring nut
one turn.
Retighten the steering ring nut
using the steering nut wrench.
WARNING
Avoid over-tightening.
T R..
Steering ring nut
(final tightening):
7 Nm
(0.7 m  kg, 5.1 ft  lb)
Check the steering stem by
turning it lock to lock. If there is
any binding, remove the steer-
ing stem assembly and inspect
the steering bearings.
Install the washer
5, collar
6,
upper bracket
7, washer
8,
steering stem nut
9, handlebar
0, handlebar upper holder
A
and headlight
B.
NOTE:Install the collar
6 with the
larger inside diameter facing
downwards.
The handlebar upper holder
should be installed with the
punched mark
a forward.
Install the handlebar so that the
marks
b are in place on both
sides.
Install the handlebar so that the
projection
c of the handlebar
upper holder is positioned at the
mark on the handlebar as shown.
Insert the end of the fuel
breather hose
C into the hole in
the steering stem.
CAUTION:
First tighten the bolts on the
front side of the handlebar
upper holder, and then tighten
the bolts on the rear side.
Dévisser d’un tour l’écrou de blo-
cage de la direction.
Resserrer l’écrou de blocage de la
direction à l’aide de la clé pour
écrou de direction.
AVERTISSEMENT
Eviter de serrer à l’excès.
T R..
Ecrou de blocage de la
direction (serrage final):
7 Nm
(0,7 m  kg, 5,1 ft  lb)
Contrôler la colonne de direction
en la tournant d’une butée à l’autre.
S’il y a la moindre gêne, démonter
la colonne de direction et contrôler
les paliers de la direction.
Monter la rondelle 5, entretoise
épaulée 6, le té supérieur 7, la
rondelle 8, l’écrou de blocage de
la direction 9, le guidon 0, le
demi-palier de guidon supérieur A
et le phare B.
N.B.:
Monter l’entretoise épaulée 6, le
diamètre intérieur plus large vers le
bas.
Le demi-palier supérieur du guidon
doit être monté avec son poinçon
a vers l’avant.
Monter le guidon de façon à ce que
les repères b soient en place des
deux côtés.
Monter le guidon de manière à ce
que l’ergot c du support du gui-
don supérieur soit positionné selon
le repère d’alignement situé sur le
guidon, comme indiqué.
Introduire l’extrémité de la durit de
mise à l’air du réservoir de carbu-
rant C dans le trou de la colonne
de direction.
ATTENTION:
Serrer d’abord les boulons situés à
l’avant du demi-palier supérieur
du guidon, puis les boulons situés à
l’arrière.
CHASSIS
CHÂSSIS