2003 YAMAHA YZ250F radiator cap

lumbar support fuse wheel size gas type wiring diagram oil

Page 23 of 662

YAMAHA YZ250F 2003 Owners Manual KAPITEL 4
MOTOR
SITZBANK, KRAFTSTOFFTANK
UND SEITENABDECKUNGEN .. 4-1
KRÜMMER
UND SCHALLDÄMPFER ........... 4-3
KÜHLER ..................................... 4-5
VERGASER .........................

KAPITEL 4
MOTOR
SITZBANK, KRAFTSTOFFTANK
UND SEITENABDECKUNGEN .. 4-1
KRÜMMER
UND SCHALLDÄMPFER ........... 4-3
KÜHLER ..................................... 4-5
VERGASER ................................ 4-8
NOCKENWELLE ...................... 4-21
ZYLINDERKOPF ...................... 4-30
VENTILE
UND VENTILFEDERN ............. 4-33
ZYLINDER UND KOLBEN ....... 4-42
KUPPLUNG .............................. 4-49
ÖLFILTEREINSATZ, WASSER-
PUMPE UND RECHTE KURBEL-
WELLENABDECKUNG ........... 4-56
AUSGLEICHSWELLE .............. 4-63
ÖLPUMPE ................................ 4-66
KICKSTARTER UND KICKSTAR-
TERWELLE .............................. 4-71
CDI-SCHWUNGRADMAGNETZÜN-
DER .......................................... 4-78
MOTOR DEMONTIEREN ......... 4-82
KURBELGEHÄUSE UND KURBEL-
WELLE ..................................... 4-87
GETRIEBE, SCHALTWALZE UND
SCHALTGABELN .................... 4-96
KAPITEL 5
FAHRWERK
VORDER- UND HINTERRAD .... 5-1
VORDER-
UND HINTERRADBREMSE .... 5-10
TELESKOPGABEL .................. 5-26
LENKER ................................... 5-39
LENKKOPF .............................. 5-45
SCHWINGE .............................. 5-50
FEDERBEIN ............................. 5-58
CHAPITRE 4
MOTEUR
SELLE, RESERVOIR
DE CARBURANT ET CACHES
LATERAUX .................................... 4-1
TUYAU D’ECHAPPEMENT
ET SILENCIEUX ........................... 4-3
RADIATEUR .................................. 4-5
CARBURATEUR ........................... 4-8
ARBRES A CAMES ..................... 4-21
CULASSE ...................................... 4-30
SOUPAPES ET
RESSORTS DE SOUPAPE ......... 4-33
CYLINDRE ET PISTON ............. 4-42
EMBRAYAGE .............................. 4-49
ELEMENT DE FILTRE
A HUILE, POMPE A EAU ET
DEMI-CARTER DROIT ............. 4-56
BALANCIER ................................ 4-63
POMPE A HUILE ........................ 4-66
ARBRE DE KICK
ET ARBRE DE SELECTEUR .... 4-71
VOLANT MAGNETIQUE
CDI ................................................. 4-78
DEPOSE DU MOTEUR .............. 4-82
CARTER ET VILEBREQUIN .... 4-87
BOITE A VITESSES,
TAMBOUR ET FOURCHETTES
DE SELECTION .......................... 4-96
CHAPITRE 5
PARTIE CYCLE
ROUE AVANT
ET ROUE ARRIERE ..................... 5-1
FREIN AVANT ET FREIN
ARRIERE ...................................... 5-10
FOURCHE AVANT ..................... 5-26
GUIDON ........................................ 5-39
DIRECTION ................................. 5-45
BRAS OSCILLANT ..................... 5-50
AMORTISSEUR ARRIERE ....... 5-58
CAPITOLO 4
MOTORE
SELLA, SERBATOIO
CARBURANTE
E CARENATURA LATERALE ... 4-1
TUBO DI SCARICO
E SILENZIATORE ........................ 4-3
RADIATORE .................................. 4-5
CARBURATORE ........................... 4-8
ALBERI A CAMME .................... 4-21
TESTATA DEL CILINDRO ....... 4-30
VALVOLE
E MOLLE VALVOLE ................. 4-33
CILINDRO E PISTONE .............. 4-42
FRIZIONE ..................................... 4-49
ELEMENTO FILTRANTE
DELL’OLIO, POMPA
DELL’ACQUA E COPERCHIO
CARTER DESTRO ...................... 4-56
BILANCIERE ............................... 4-63
POMPA DELL’OLIO .................. 4-66
ALBERO PEDALE
E ALBERO DEL CAMBIO ......... 4-71
MAGNETE CDI ........................... 4-78
RIMOZIONE DEL MOTORE .... 4-82
CARTER E ALBERO
MOTORE ...................................... 4-87
TRASMISSIONE, CAMMA DEL
CAMBIO E FORCELLA
DEL CAMBIO .............................. 4-96
CAPITOLO 5
PARTE CICLISTICA
RUOTA ANTERIORE E RUOTA
POSTERIORE ................................ 5-1
FRENO ANTERIORE E
POSTERIORE .............................. 5-10
FORCELLA ANTERIORE ......... 5-26
MANUBRIO .................................. 5-39
STERZO ........................................ 5-45
FORCELLONE
OSCILLANTE .............................. 5-50
AMMORTIZZATORE
POSTERIORE .............................. 5-58

Page 26 of 662

YAMAHA YZ250F 2003 Owners Manual GEN
INFO
1 - 1
DESCRIPTION
EC100000
GENERAL INFORMATION
EC110000
DESCRIPTION
1Clutch lever
2Hot starter lever
3Front brake lever
4Throttle grip
5Radiator cap
6Fuel tank cap
7Engine stop switch
8Kickst

Page 38 of 662

YAMAHA YZ250F 2003 Owners Manual GEN
INFO
1 - 7
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

Page 82 of 662

YAMAHA YZ250F 2003 Owners Manual SPEC

2 - 9
MAINTENANCE SPECIFICATIONS
Lubrication system:
Oil filter type Wire mesh type ----
Oil pump type Trochoid type ----
Tip clearance 0.12 mm or less
(0.0047 in or less)0.20 mm
(0.008 in)

Page 83 of 662

YAMAHA YZ250F 2003 Owners Manual SPEC

2 - 10
MAINTENANCE SPECIFICATIONS
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
Cyl

Page 133 of 662

YAMAHA YZ250F 2003 Owners Manual SPEC
2 - 9
SPECIFICHE DI MANUTENZIONE
Sistema di lubrificazione:
Tipo di filtro Tipo a maglia metallica ----
Tipo di pompa dell’olio Tipo trocoidale ----
Gioco della punta 0,12 mm o inferiore
(0,00

Page 134 of 662

YAMAHA YZ250F 2003 Owners Manual SPEC
2 - 10
SPECIFICHE DI MANUTENZIONE
Elemento da serrareDimensioni
della filettaturaQuantitàCoppia di serraggio
Nm m·kg ft·lb
Candela d’accensione M10S × 1,0 1 13 1,3 9,4
Cappello dell’albe

SPEC
2 - 10
SPECIFICHE DI MANUTENZIONE
Elemento da serrareDimensioni
della filettaturaQuantitàCoppia 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
Tappo a vite testata del cilindro M12 × 1,0 1 37 3,7 27
Testata del cilindro (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 del cilindro M6 × 1,0 2 10 1,0 7,2
Cilindro M6 × 1,0 1 10 1,0 7,2
Peso bilanciere M6 × 1,0 2 10 1,0 7,2
Ingranaggio condotto dell’albero di equilibratura 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
Vite senza dado del tenditore della catena di
distribuzioneM6 × 1,0 1 7 0,7 5,1
Rotore M8 × 1,25 1 14 1,4 10
Tubo flessibile radiatore M6 × 1,0 8 2 0,2 1,4
Bullone di scarico del 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 del radiatore M6 × 1,0 2 10 1,0 7,2
Tubazione 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
Bullone di scarico elemento filtro dell’olio M6 × 1,0 1 10 1,0 7,2
Coperchio filtro dell’olio M6 × 1,0 2 10 1,0 7,2
Filtro olio M6 × 1,0 2 10 1,0 7,2
Tubazione alimentazione olio 1 (M10) M10 × 1,25 1 20 2,0 14
(M8) M8 × 1,25 2 18 1,8 13
Tubo flessibile dell’olio M6 × 1,0 2 10 1,0 7,2
Fascetta fermatubo dell’olio—2 2 0,2 1,4
Filtro dell’olio e telaio M14 × 1,5 1 70 7,0 50
Fascetta giunto carburatore M4 × 0,7 2 3 0,3 2,2
Fascetta giunto filtro dell’aria M6 × 1,0 1 3 0,3 2,2
Coperchio cavo dell’acceleratore M5 × 0,8 2 4 0,4 2,9
Stantuffo dell’avviamento a caldo M12 × 1,0 1 2 0,2 1,4
Scatola del filtro dell’aria M6 × 1,0 2 8 0,8 5,8
Giunto filtro dell’olio e contenitore filtro dell’aria M5 × 0,8 1 4 0,4 2,9
Filtro dell’aria M6 × 1,0 1 2 0,2 1,4
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
Marmitta di scarico M8 × 1,25 2 35 3,5 25
Morsetto marmitta di scarico M8 × 1,25 1 20 2,0 14

Page 153 of 662

YAMAHA YZ250F 2003 Owners Manual 3 - 2
INSP
ADJ
MAINTENANCE INTERVALS
SHIFT FORK, SHIFT CAM, GUIDE BAR
Inspect
● Inspect wear
ROTOR NUT
Retighten
● ●
EXHAUST PIPE, SILENCER, PRO-
TECTOR
Inspect and retighten
Clean
Replace
●

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