radiator cap YAMAHA WR 250F 2005 Manuale duso (in Italian)

KAPITEL 4
MOTOR
SITZBANK, KRAFTSTOFFTANK
UND SEITENABDECKUNGEN... 4-2
AUSPUFFKRÜMMER UND
SCHALLDÄMPFER.................... 4-8
KÜHLER.................................... 4-14
VERGASER............................... 4-22
NOCKENWELLEN.................... 4-52
ZYLINDERKOPF....................... 4-74
VENTILE UND
VENTILFEDERN....................... 4-82
ZYLINDER UND KOLBEN...... 4-102
KUPPLUNG............................. 4-118
ÖLFILTER, WASSERPUMPE UND
KURBELGEHÄUSEDECKEL
RECHTS.................................. 4-136
AUSGLEICHSWELLE............. 4-152
ÖLPUMPE............................... 4-160
KICKHEBELWELLE UND
SCHALTWELLE...................... 4-170
LICHTMASCHINE UND
STARTERKUPPLUNG............ 4-186
MOTOR DEMONTIEREN........ 4-208
KURBELGEHÄUSE UND
KURBELWELLE..................... 4-222
GETRIEBE, SCHALTWALZE
UND SCHALTGABELN.......... 4-246
KAPITEL 5
FAHRWERK
VORDER- UND HINTERRAD..... 5-2
VORDER- UND
HINTERRADBREMSEN............ 5-24
TELESKOPGABEL................... 5-62
LENKER.................................... 5-92
LENKUNG............................... 5-104
SCHWINGE............................. 5-120
FEDERBEIN............................ 5-140
CAPITOLO 4
MOTORE
SELLA, SERBATOIO
CARBURANTE E FIANCHETTI....4-3
TUBO DI SCARICO E
SILENZIATORE............................ 4-9
RADIATORE................................ 4-15
CARBURATORE.......................... 4-23
ALBERI A CAMME..................... 4-53
TESTATA...................................... 4-75
VALVOLE E MOLLE
VALVOLE..................................... 4-83
CILINDRO E PISTONE............ 4-103
FRIZIONE................................... 4-119
ELEMENTO FILTRO OLIO,
POMPA DELL’ACQUA E
COPERCHIO
CARTER DESTRO.................... 4-137
EQUILIBRATORE..................... 4-153
POMPA DELL’OLIO................ 4-161
ALBERO PEDALE E ALBERO
DEL CAMBIO............................. 4-171
MAGNETE AC E GIUNTO
STARTER.................................... 4-187
RIMOZIONE DEL MOTORE.... 4-209
CARTER E ALBERO
MOTORE..................................... 4-223
TRASMISSIONE, CAMMA
DEL CAMBIO E FORCELLA
DEL CAMBIO............................. 4-247
CAPITOLO 5
PARTE CICLISTICA
RUOTA ANTERIORE E
POSTERIORE................................. 5-3
FRENO ANTERIORE E
POSTERIORE............................... 5-25
FORCELLA ANTERIORE......... 5-63
MANUBRIO.................................. 5-93
STERZO....................................... 5-105
FORCELLONE
OSCILLANTE............................. 5-121
AMMORTIZZATORE
POSTERIORE............................. 5-141
CAPÍTULO 4
MOTOR
SILLÍN, DEPÓSITO DE
COMBUSTIBLE Y CUBIERTAS
LATERALES............................... 4-4
TUBO DE ESCAPE Y
SILENCIADOR.......................... 4-10
RADIADOR................................ 4-16
CARBURADOR......................... 4-24
EJES DE LEVAS....................... 4-54
CULATA.................................... 4-76
VÁLVULAS Y MUELLES DE
VÁLVULAS................................ 4-84
CILINDRO Y PISTÓN.............. 4-104
EMBRAGUE............................ 4-120
ELEMENTO DEL FILTRO DE
ACEITE, BOMBA DE AGUA Y
TAPA DEL CÁRTER
DERECHA............................... 4-138
COMPENSADOR.................... 4-154
BOMBA DE ACEITE............... 4-162
EJE DEL PEDAL DE ARRANQUE
Y EJE DEL CAMBIO............... 4-172
MAGNETO CA Y EMBRAGUE
DE ARRANQUE...................... 4-188
DESMONTAJE DEL
MOTOR.................................... 4-210
CÁRTER Y CIGÜEÑAL........... 4-224
CAJA DE CAMBIOS,
LEVA DE CAMBIO Y
HORQUILLA DE CAMBIO...... 4-248
CAPÍTULO 5
CHASIS
RUEDA DELANTERA Y
RUEDA TRASERA...................... 5-4
FRENO DELANTERO Y
FRENO TRASERO.................... 5-26
HORQUILLA DELANTERA...... 5-64
MANILLAR................................ 5-94
DIRECCIÓN............................. 5-106
BASCULANTE........................ 5-122
AMORTIGUADOR
TRASERO............................... 5-142

1 - 1
GEN
INFODESCRIPTION
EC100000
GENERAL INFORMATION
EC110000
DESCRIPTION
1Clutch lever
2Hot starter lever
3Engine stop switch
4Trip meter
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
LDrive chain
MShift pedal
NOil dipstick
OFront 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.
1234
5
6
7
8
9 0
A
BCDE
F G
HIJK
L M
N O
RENSEIGNEMENTS GENERAUX
DESCRIPTION
1Levier d’embrayage
2Levier de démarrage à chaud
3Coupe-circuit du moteur
4Compteur journalier
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
LChaîne de transmission
MSélecteur
NJauge d’huile
OFourche
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-1423, 90890-01423 Damper rod holder
Use this tool to remove and install the damper rod.
YM-01442, 90890-01442 Fork seal driver
This tool is used when install the fork oil seal.

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 107.8 mm (4.2 in) ----
Height 220 mm (8.7 in) ----
Thickness 32 mm (1.26 in) ----
Radiator cap opening pressure 110 kPa (1.1 kg/cm
2, 15.6 psi) ----
Radiator capacity (total) 0.56 L (0.49 Imp qt, 0.59 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 8 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 M6 × 1.0 6 10 1.0 7.2
Radiator guard M6 × 1.0 2 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 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 and frame M14 × 1.5 1 70 7.0 50
Carburetor joint clamp M4 × 0.7 2 3 0.3 2.2
Air filter joint clamp M6 × 1.0 1 3 0.3 2.2
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
Air filter case M6 × 1.0 2 8 0.8 5.8
Air filter joint and air filter case M5 × 0.8 1 4 0.4 2.9
Exhaust pipe (nut) M8 × 1.25 1 13 1.3 9.4
(bolt) M8 × 1.25 1 24 2.4 17
Exhaust pipe protector M6 × 1.0 3 10 1.0 7.2

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 107,8 mm (4,2 in) ----
Altezza 220 mm (8,7 in) ----
Spessore 32 mm (1,26 in) ----
Pressione di apertura coperchio del radiatore 110 kPa (1,1 kg/cm
2, 15,6 psi) ----
Capacità radiatore (totale) 0,56 L (0,49 Imp qt, 0,59 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 8 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
Radiatore M6 × 1,0 6 10 1,0 7,2
Riparo radiatore M6 × 1,0 2 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 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 e telaio M14 × 1,5 1 70 7,0 50
Morsetto giunto carburatore M4 × 0,7 2 3 0,3 2,2
Morsetto giunto del filtro dell’aria M6 × 1,0 1 3 0,3 2,2
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
Pistoncino starter M12 × 1,0 1 2 0,2 1,4
Scatola filtro aria M6 × 1,0 2 8 0,8 5,8
Giunto e scatola del filtro dell’aria M5 × 0,8 1 4 0,4 2,9
Tubo di scarico (dado) M8 × 1,25 1 13 1,3 9,4
(bullone) M8 × 1,25 1 24 2,4 17
Protezione tubo di scarico M6 × 1,0 3 10 1,0 7,2

SPEC
2 - 97
CABLE ROUTING DIAGRAM
EC240000
CABLE ROUTING DIAGRAM
1Fuel tank breather hose
2Oil tank breather hose
3Clamp
4Diode
5Wire harness
6Hot starter cable
7Throttle position sensor lead
8Neutral switch lead
9Oil hose
0Hose guideAAC magneto lead
BCylinder head breather hose
CStarter motor lead
DClutch cable
ERadiator hose 1
FCable guide
GRadiator pipe (radiator hose 4)
HNegative battery lead
IBrake hose
JCarburetor breather hoseKCarburetor overflow hose
LCoolant reservoir breather hose
ÈInsert the fuel tank breather hose into
the hole in the steering stem cap.
ÉPass the oil tank breather hose on the
outside of the AC magneto lead, neu-
tral switch lead, wire harness, starter
motor lead, negative battery lead and
cylinder head breather hose.
B
BA
B-B
A
Ö3 ×BØC
Ô0
Õ3 G
D
EH
ÙF ÙF
I0ÛF
Ü30
1
È
3
Ê
4
3
Ë
3
Ì5
63
Í
3
Î3
Ï
Ð
Ò Ú3
Ñ
7
9 3
Ó 0
ÔÝ JJ
KL
8 A2
É
9
8

2 - 98
SPEC
CHEMINEMENT DES CABLES
1Durit de mise à l’air du réservoir de
carburant
2Durit de mise à l’air du réservoir d’huile
3Collier
4Diode
5Faisceau de fils
6Câble de démarrage à chaud
7Fil du capteur de position de papillon des
gaz
8Fil du contacteur de point mort
9Durit d’huile
0Guide de duritAFil de l’alternateur avec rotor à
aimantation permanente
BDurit de mise à l’air de la culasse
CFil de démarreur
DCâble d’embrayage
EDurit de radiateur 1
FGuide de câble
GTuyau de radiateur (durit de radiateur 4)
HCâble négatif de batterie
IDurit de frein
JDurit de mise à l’air du carburateur
KDurit de trop-plein du carburateur
LDurit de mise à l’air du vase d’expansion ÈInsérer la durit de mise à l’air du réservoir
de carburant dans le trou du capuchon de
la colonne de direction.
ÉAcheminer la durit de mise à l’air du réser-
voir d’huile à l’extérieur du fil de l’alterna-
teur avec rotor à aimantation permanente,
du fil de contacteur de point mort, du fais-
ceau de fils, du fil du démarreur, du câble
négatif de batterie et de la durit de mise à
l’air de la culasse.
KABELFÜHRUNGSDIAGRAMME
1Kraftstofftank-Belüftungsschlauch
2Öltank-Belüftungsschlauch
3Klemme
4Diode
5Kabelbaum
6Warmstartzug
7Drosselklappensensor-Kabel
8Leerlaufschalter-Kabel
9Ölschlauch
0SchlauchführungALichtmaschinen-Kabel
BZylinderkopf-Entlüftungsschlauch
CStarter-Kabel
DKupplungszug
EKühler-Schlauch 1
FKabelführung
GKühlerrohr (Kühlerschlauch 4)
HBatterie-Minuskabel
IBremsschlauch
JVergaser-Entlüftungsschlauch
KVergaser-Überlaufschlauch
LAusgleichsbehälter-
EntlüftungsschlauchÈDen Kraftstofftank-Belüftungsschlauch
durch die Bohrung in der Lenkkopf-
Abdeckung stecken.
ÉDen Öltank-Belüftungsschlauch über
die Lichtmaschinen-, Leerlaufschalter-,
Batterie-Minus- und Starter-Kabel, den
Kabelbaum und den Zylinderkopf-Ent-
lüftungsschlauch führen.
SCHEMA PERCORSO DEI CAVI
1Flessibile di sfiato del serbatoio carburante
2Flessibile di sfiato del serbatoio olio
3Morsetto
4Diodo
5Cablaggio elettrico
6Cavo starter per partenze a caldo
7Cavo sensore posizione farfalla
8Cavo interruttore folle
9Flessibile olio
0Guida flessibileACavo magnete AC
BFlessibile di sfiato testata
CCavo motorino di avviamento
DCavo della frizione
EFlessibile radiatore 1
FGuida cavo
GTubo del radiatore (flessibile radiatore 4)
HCavo negativo batteria
ITubo del freno
JFlessibile di sfiato carburatore
KFlessibile di traboccamento carburatore
LFlessibile di sfiato del serbatoio
refrigeranteÈInserire il flessibile di sfiato del serbatoio
carburante nel foro del rivestimento del
fusto dello sterzo.
ÉFar passare il flessibile di sfiato del serba-
toio olio all’esterno del cavo del magnete
AC, del cavo dell’interruttore folle, del
cablaggio elettrico, del cavo del motorino
di avviamento, del cavo negativo della bat-
teria e del flessibile di sfiato della testata.
DIAGRAMA DE CABLEADO
1Tubo respiradero del depósito de
combustible
2Tubo respiradero del depósito de aceite
3Abrazadera
4Diodo
5Mazo de cables
6Cable de arranque en caliente
7Cable del sensor de posición del
acelerador
8Cable del interruptor de luz de punto
muerto
9Tubo de aceite
0Guía de tuboACable de la magneto CA
BTubo respiradero de la culata
CCable del motor de arranque
DCable de embrague
ETubo del radiador 1
FGuía de cable
GTubería del radiador
(tubo del radiador 4)
HCable negativo de la batería
ITubo de freno
JTubo respiradero del carburador
KTubo de desbordamiento del
carburador
LTubo respiradero del depósito de
refrigeranteÈIntroduzca el tubo respiradero del
depósito de combustible por el orificio
de la tapa del vástago de la dirección.
ÉPase el tubo respiradero del depósito
de aceite por fuera del cable de la
magneto CA, del cable del interruptor
de luz de punto muerto, del mazo de
cables, del cable del motor de
arranque, del cable negativo de la
batería y del tubo respiradero de la
culata.
CHEMINEMENT DES CABLES
KABELFÜHRUNGSDIAGRAMME
SCHEMA PERCORSO DEI CAVI
DIAGRAMA DE CABLEADO

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
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