2007 YAMAHA WR 250F radiator cap

KAPITEL 4
ABSTIMMUNG
MOTOR....................................... 4-2
FAHRWERK.............................. 4-22
KAPITEL 5
MOTOR
KÜHLER...................................... 5-2
VERGASER............................... 5-10
SEKUNDÄRLUFTSYSTEM...... 5-40
NOCKENWELLEN.................... 5-46
ZYLINDERKOPF....................... 5-68
VENTILE UND
VENTILFEDERN....................... 5-76
ZYLINDER UND KOLBEN........ 5-96
KUPPLUNG............................. 5-112
ÖLFILTER, WASSERPUMPE UND
KURBELGEHÄUSEDECKEL
RECHTS.................................. 5-130
AUSGLEICHSWELLE............. 5-146
ÖLPUMPE............................... 5-154
ÖLTANK.................................. 5-158
KICKHEBELWELLE UND
SCHALTWELLE...................... 5-168
LICHTMASCHINE UND
STARTERKUPPLUNG............ 5-186
MOTOR DEMONTIEREN........ 5-208
KURBELGEHÄUSE UND
KURBELWELLE..................... 5-222
GETRIEBE, SCHALTWALZE
UND SCHALTGABELN.......... 5-246
KAPITEL 6
FAHRWERK
VORDER- UND
HINTERRAD................................ 6-2
VORDER- UND
HINTERRADBREMSEN............ 6-24
TELESKOPGABEL................... 6-62
LENKER.................................... 6-92
LENKUNG............................... 6-106
SCHWINGE............................. 6-122
FEDERBEIN............................ 6-142
CAPITOLO 4
MESSA A PUNTO
MOTORE......................................... 4-2
PARTE CICLISTICA.................. 4-22
CAPITOLO 5
MOTORE
RADIATORE.................................. 5-3
CARBURATORE.......................... 5-11
SISTEMA DI INIEZIONE
ARIA............................................... 5-41
ALBERI A CAMME..................... 5-47
TESTATA...................................... 5-69
VALVOLE E MOLLE
VALVOLE..................................... 5-77
CILINDRO E PISTONE.............. 5-97
FRIZIONE................................... 5-113
ELEMENTO FILTRO OLIO,
POMPA DELL’ACQUA
E COPERCHIO CARTER
DESTRO...................................... 5-131
EQUILIBRATORE..................... 5-147
POMPA DELL’OLIO................ 5-155
SERBATOIO DELL’OLIO....... 5-159
ALBERO PEDALE E
ALBERO DEL CAMBIO........... 5-169
MAGNETE AC E GIUNTO
STARTER.................................... 5-187
RIMOZIONE DEL
MOTORE..................................... 5-209
CARTER E ALBERO
MOTORE..................................... 5-223
TRASMISSIONE, CAMMA
DEL CAMBIO E FORCELLA
DEL CAMBIO............................. 5-247
CAPITOLO 6
PARTE CICLISTICA
RUOTA ANTERIORE
E POSTERIORE............................. 6-3
FRENO ANTERIORE E
POSTERIORE............................... 6-25
FORCELLA ANTERIORE......... 6-63
MANUBRIO.................................. 6-93
STERZO....................................... 6-107
FORCELLONE
OSCILLANTE............................. 6-123
AMMORTIZZATORE
POSTERIORE............................. 6-143
CAPÍTULO 4
REGLAJE
MOTOR........................................ 4-2
CHASIS..................................... 4-22
CAPÍTULO 5
MOTOR
RADIADOR.................................. 5-4
CARBURADOR......................... 5-12
SISTEMA DE INDUCCIÓN
DE AIRE.................................... 5-42
EJES DE LEVAS....................... 5-48
CULATA.................................... 5-70
VÁLVULAS Y MUELLES
DE VÁLVULAS.......................... 5-78
CILINDRO Y PISTÓN................ 5-98
EMBRAGUE............................ 5-114
ELEMENTO DEL FILTRO
DE ACEITE, BOMBA DE
AGUA Y TAPA DEL
CÁRTER DERECHA............... 5-132
COMPENSADOR.................... 5-148
BOMBA DE ACEITE............... 5-156
DEPÓSITO DE ACEITE.......... 5-160
EJE DEL PEDAL DE
ARRANQUE Y EJE DEL
CAMBIO.................................. 5-170
MAGNETO CA Y
EMBRAGUE DE
ARRANQUE............................ 5-188
DESMONTAJE DEL
MOTOR.................................... 5-210
CÁRTER Y CIGÜEÑAL........... 5-224
CAJA DE CAMBIOS,
LEVA DE CAMBIO Y
HORQUILLA DE CAMBIO...... 5-248
CAPÍTULO 6
CHASIS
RUEDA DELANTERA Y
RUEDA TRASERA...................... 6-4
FRENO DELANTERO Y
FRENO TRASERO.................... 6-26
HORQUILLA DELANTERA...... 6-64
MANILLAR................................ 6-94
DIRECCIÓN............................. 6-108
BASCULANTE........................ 6-124
AMORTIGUADOR
TRASERO............................... 6-144

1 - 1
GEN
INFODESCRIPTION
EC100000
GENERAL INFORMATION
EC110000
DESCRIPTION
1Clutch lever
2Hot starter lever
3Engine stop switch
4Multi-function display
5Main switch
6Start switch
7Front brake lever
8Throttle grip
9Radiator cap
0Fuel tank cap
ATaillight
BKickstarter crank
CFuel tank
DHeadlight
ERadiator
FCoolant drain bolt
GRear brake pedal
HValve joint
IFuel cock
JCold starter knob
KAir cleaner
LCatch tank
MDrive chain
NOil level check window
OShift pedal
PFront fork
NOTE:The machine you have purchased may differ slightly
from those shown in the following.
Designs and specifications are subject to change with-
out notice.
RENSEIGNEMENTS GENERAUX
DESCRIPTION
1Levier d’embrayage
2Levier de démarrage à chaud
3Coupe-circuit du moteur
4Ecran multifonction
5Contacteur à clé
6Contacteur du démarreur
7Levier de frein avant
8Poignée des gaz
9Bouchon du radiateur
0Bouchon de réservoir de carburant
AFeu arrière
BPédale de kick
CRéservoir de carburant
DPhare
ERadiateur
FBoulon de vidange du liquide de refroidissement
GPédale de frein arrière
HClapet de reniflard
IRobinet de carburant
JCommande de départ à froid
KFiltre à air
LRéservoir de récupération
MChaîne de transmission
NHublot de contrôle du niveau d’huile
OSélecteur
PFourche
N.B.:
Votre moto diffère peut-être partiellement de celle montrée
sur ces photos.
La conception et les caractéristiques peuvent être modifiées
sans préavis.
DESCRIPTION

1 - 11
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
2 - 9
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

MAINTENANCE SPECIFICATIONS
2 - 10
SPEC
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Spark plug M10S × 1.0 1 13 1.3 9.4
Camshaft cap M6 × 1.0 10 10 1.0 7.2
Cylinder head blind plug screw M12 × 1.0 1 28 2.8 20
Cylinder head (stud bolt) M6 × 1.0 2 7 0.7 5.1
(stud bolt) M8 × 1.25 1 15 1.5 11
(bolt) M9 × 1.25 4 38 3.8 27
(nut) M6 × 1.0 2 10 1.0 7.2
Cylinder head cover M6 × 1.0 2 10 1.0 7.2
Cylinder M6 × 1.0 1 10 1.0 7.2
Balancer weight M6 × 1.0 2 10 1.0 7.2
Balancer shaft driven gear M14 × 1.0 1 50 5.0 36
Timing chain guide (intake side) M6 × 1.0 2 10 1.0 7.2
Timing chain tensioner M6 × 1.0 2 10 1.0 7.2
Timing chain tensioner cap bolt M6 × 1.0 1 7 0.7 5.1
Impeller M8 × 1.25 1 14 1.4 10
Radiator hose clamp M6 × 1.0 10 2 0.2 1.4
Coolant drain bolt M6 × 1.0 1 10 1.0 7.2
Water pump housing M6 × 1.0 4 10 1.0 7.2
Radiator stay M6 × 1.0 6 10 1.0 7.2
Radiator M6 × 1.0 4 10 1.0 7.2
Radiator pipe M6 × 1.0 1 10 1.0 7.2
Oil pump cover M4 × 0.7 1 2 0.2 1.4
Oil pump M6 × 1.0 3 10 1.0 7.2
Oil filter element drain bolt M6 × 1.0 1 10 1.0 7.2
Oil filter element cover M6 × 1.0 2 10 1.0 7.2
Oil strainer (crankcase) M6 × 1.0 2 10 1.0 7.2
Oil delivery pipe 1 (M10) M10 × 1.25 1 20 2.0 14
(M8) M8 × 1.25 2 18 1.8 13
Oil hose M6 × 1.0 2 8 0.8 5.8
Oil hose clamp—220.21.4
Oil strainer (oil tank) M6 × 1.0 1 9 0.9 6.5
Oil tank drain bolt M8 × 1.25 1 18 1.8 13
Oil tank (upper) M6 × 1.0 1 7 0.7 5.1
Oil tank and frame M6 × 1.0 3 9 0.9 6.5
Oil pressure check bolt M6 × 1.0 1 10 1.0 7.2
Carburetor joint M6 × 1.0 2 10 1.0 7.2
Carburetor joint clamp M4 × 0.7 1 3 0.3 2.2
Air filter joint clamp M6 × 1.0 1 3 0.3 2.2
Throttle cable adjust bolt and locknut M6 × 0.75 1 4 0.4 2.9
Throttle cable (pull) M6 × 1.0 1 4 0.4 2.9
Throttle cable (return) M12 × 1.0 1 11 1.1 8.0
Throttle cable cover M5 × 0.8 2 4 0.4 2.9
Hot starter plunger M12 × 1.0 1 2 0.2 1.4

SPECIFICHE DI MANUTENZIONE
2 - 66
SPEC
Sistema di lubrificazione:
Tipo di filtro olio Tipo di carta ----
Tipo di pompa dell’olio Tipo trocoidale ----
Gioco sull’estremità0,12 mm o inferiore
(0,0047 in o inferiore)0,20 mm
(0,008 in)
Gioco laterale 0,09 ~ 0,17 mm
(0,0035 ~ 0,0067 in)0,24 mm
(0,009 in)
Gioco tra alloggiamento e rotore 0,03 ~ 0,10 mm
(0,0012 ~ 0,0039 in)0,17 mm
(0,0067 in)
Raffreddamento:
Dimensioni del nucleo del radiatore
Larghezza 120,2 mm (4,73 in) ----
Altezza 240 mm (9,45 in) ----
Spessore 22 mm (0,87 in) ----
Pressione di apertura coperchio del radiatore 110 kPa (1,1 kg/cm
2, 15,6 psi) ----
Capacità radiatore (totale) 0,54 L (0,48 Imp qt, 0,57 US qt) ----
Pompa dell’acqua
Tipo Pompa centrifuga ad aspirazione
singola---- Elemento Standard Limite

SPECIFICHE DI MANUTENZIONE
2 - 67
SPEC
Elemento da serrare Filettatura QuantitàCoppia di serraggio
Nm m·kg ft·lb
Candela d’accensione M10S × 1,0 1 13 1,3 9,4
Cappello dell’albero a camme M6 × 1,0 10 10 1,0 7,2
Vite del tappo cieco coperchio testata M12 × 1,0 1 28 2,8 20
Testata (prigioniero) M6 × 1,0 2 7 0,7 5,1
(prigioniero) M8 × 1,25 1 15 1,5 11
(bullone) M9 × 1,25 4 38 3,8 27
(dado) M6 × 1,0 2 10 1,0 7,2
Coperchio testata M6 × 1,0 2 10 1,0 7,2
Cilindro M6 × 1,0 1 10 1,0 7,2
Contrappeso equilibratore M6 × 1,0 2 10 1,0 7,2
Ingranaggio condotto dell’albero equilibratore M14 × 1,0 1 50 5,0 36
Guida catena di distribuzione (lato aspirazione) M6 × 1,0 2 10 1,0 7,2
Tenditore catena di distribuzione M6 × 1,0 2 10 1,0 7,2
Tappo filettato del tenditore catena di distribuzione M6 × 1,0 1 7 0,7 5,1
Rotore M8 × 1,25 1 14 1,4 10
Morsetto del tubo flessibile radiatore M6 × 1,0 10 2 0,2 1,4
Bullone di scarico refrigerante M6 × 1,0 1 10 1,0 7,2
Alloggiamento della pompa dell’acqua M6 × 1,0 4 10 1,0 7,2
Supporto radiatore M6 × 1,0 6 10 1,0 7,2
Radiatore M6 × 1,0 4 10 1,0 7,2
Tubo del radiatore M6 × 1,0 1 10 1,0 7,2
Coperchio pompa dell’olio M4 × 0,7 1 2 0,2 1,4
Pompa dell’olio M6 × 1,0 3 10 1,0 7,2
Tappo di scarico dell’elemento filtro olio M6 × 1,0 1 10 1,0 7,2
Coperchio elemento filtro olio M6 × 1,0 2 10 1,0 7,2
Filtro olio (carter) M6 × 1,0 2 10 1,0 7,2
Tubo di mandata olio 1 (M10) M10 × 1,25 1 20 2,0 14
(M8) M8 × 1,25 2 18 1,8 13
Flessibile olio M6 × 1,0 2 8 0,8 5,8
Morsetto flessibile olio—220,21,4
Filtro olio (serbatoio olio) M6 × 1,0 1 9 0,9 6,5
Tappo di scarico serbatoio olio M8 × 1,25 1 18 1,8 13
Serbatoio olio (superiore) M6 × 1,0 1 7 0,7 5,1
Serbatoio olio e telaio M6 × 1,0 3 9 0,9 6,5
Bullone di controllo pressione olio M6 × 1,0 1 10 1,0 7,2
Giunto del carburatore M6 × 1,0 2 10 1,0 7,2
Morsetto giunto carburatore M4 × 0,7 1 3 0,3 2,2
Morsetto giunto del filtro dell’aria M6 × 1,0 1 3 0,3 2,2
Bullone di regolazione e controdado cavo accelera-
toreM6 × 0,75 1 4 0,4 2,9
Cavo acceleratore (tirare) M6 × 1,0 1 4 0,4 2,9
Cavo acceleratore (ritornare) M12 × 1,0 1 11 1,1 8,0
Copertura cavo acceleratore M5 × 0,8 2 4 0,4 2,9

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