radiator cap YAMAHA YZ250F 2006 User Guide

INSP
ADJ
FRIZIONE Controllare la campana, il
disco conduttore, il disco
condotto e la molla della fri-
zione Controllare e regolare
Sostituire
TRASMISSIONE
Controllare
Sostituire il cuscinetto
FORCELLA DEL CAMBIO, CAMMA
DEL CAMBIO, BARRA DI GUIDA
Controllare Controllare l’usura
DADO ROTORE
Serrare
TUBO DI SCARICO, SILENZIATORE,
PROTEZIONE
Controllare e serrare
Pulire
Sostituire * In qualsiasi ordine
GOMITO
Controllare e pulire
CARBURATORE
Controllare, regolare e pulire
CANDELA DI ACCENSIONE
Controllare e pulire
Sostituire
CATENA DI TRASMISSIONE Utilizzare un lubrificante per
catene
Gioco della catena:
48 ~ 58 mm (1,9 ~ 2,3 in) Lubrificare, gioco, allineamento
Sostituire
SISTEMA DI RAFFREDDAMENTO
Controllare il livello del refrigerante e la
presenza di eventuali perdite
Controllare il funzionamento del coper-
chio del radiatore
Sostituire il refrigerante Ogni due anni
Controllare i flessibili
DADI E BULLONI ESTERNI Fare riferimento al paragrafo
“AVVIAMENTO E
RODAGGIO” nel CAPI-
TOLO 1. Serrare
FILTRO ARIA
Pulire e lubrificare Applicare l’olio schiuma fil-
tro aria o un prodotto equi-
valente Sostituire
FILTRO OLIO
Sostituire
FILTRO OLIO
Pulire
TELAIO
Pulire e controllare
SERBATOIO E RUBINETTO DEL CAR-
BURANTE
Pulire e controllareElementoDopo il
rodaggioAd ogni
compe-
tizione
Ogni tre
competi-
zioni
(o 500 km)Ogni
cinque com-
petizioni
(o
1.000 km)Se ne-
cessarioOsservazioni
INTERVALLI DI MANUTENZIONE
3 - 2

3 - 4
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.3-5 ~ 9
FuelCheck that a fresh gasoline is filled in the fuel tank. Check the
fuel line for leakage.P.1-13
Engine oilCheck that the oil level is correct. Check the crankcase and oil
line for leakage.P.3-13 ~ 17
Gear shifter and clutchCheck that gears can be shifted correctly in order and that the
clutch operates smoothly.P.3-9 ~ 10
Throttle grip/HousingCheck that the throttle grip operation and free play are correctly
adjusted. Lubricate the throttle grip and housing, if necessary.P.3-10 ~ 11
Brakes Check the play of front brake and effect of front and rear brake. P.3-23 ~ 29
Drive chainCheck drive chain slack and alignment. Check that the drive
chain is lubricated properly.P.3-30 ~ 32
WheelsCheck for excessive wear and tire pressure. Check for loose
spokes and have no excessive play.P.3-40 ~ 41
SteeringCheck that the handlebar can be turned smoothly and have no
excessive play.P.3-41 ~ 43
Front forks and rear shock
absorberCheck that they operate smoothly and there is no oil leakage. P.3-32 ~ 39
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.4-3 ~ 5
Rear wheel sprocket Check that the rear wheel sprocket tightening bolt is not loose. P.3-30
Lubrication Check for smooth operation. Lubricate if necessary. P.3-44
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P.1-18
Lead connectorsCheck that the CDI magneto, CDI unit, and ignition coil are con-
nected tightly.P.1-6
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 ~ 21

3 - 5
INSP
ADJ
EC350000
ENGINE
COOLANT LEVEL INSPECTION
WARNING
Do not remove the radiator cap
1, drain
bolt and hoses when the engine and radia-
tor are hot. Scalding 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 radiator cap, slowly rotate
the cap counterclockwise to the detent.
This procedure allows any residual pres-
sure 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. Remove:
Radiator cap
3. Check:
Coolant level a
Coolant level low → Add coolant.
1Radiator
1a
ENGINE/COOLANT LEVEL INSPECTION

3 - 6
INSP
ADJ
COOLANT REPLACEMENT
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:
Coolant drain bolt 1
3. Remove:
Radiator cap
Drain the coolant completely.
4. Clean:
Cooling system
Thoroughly flush the cooling system with
clean tap water.
5. Install:
Copper washer
Coolant drain bolt
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
6. Fill:
Radiator
Engine
To specified level.
Recommended coolant:
High quality ethylene glycol
anti-freeze containing anti-
corrosion for aluminum engine
Coolant
1 and water (soft water)
2 mixing ratio:
50%/50%
Coolant capacity:
0.99 L (0.87 Imp qt, 1.05 US qt)

INSP
ADJ
KÜHLFLÜSSIGKEIT WECHSELN
WARNUNG
Der Kühlerverschlussdeckel darf
niemals bei heißem Motor abge-
nommen werden.
ACHTUNG:
Keine Kühlflüssigkeit an lackierte
Flächen lassen. Spritzer sofort mit
Wasser abwaschen.
1. Ein Auffanggefäß unter den
Motor stellen.
2. Demontieren:
Kühlflüssigkeits-Ablass-
schraube 1
3. Demontieren:
Kühlerverschlussdeckel
Die Kühlflüssigkeit vollständig
ablaufen lassen.
4. Reinigen:
Kühlsystem
Das Kühlsystem gründlich mit
sauberem Leitungswasser
spülen.
5. Montieren:
Kupferscheibe
Kühlflüssigkeits-Ablass-
schraube
T R..10 Nm (1,0 m · kg, 7,2 ft · lb)
6. Einfüllen:
Kühler
Motor
(bis zum vorgeschriebenen
Stand)
Empfohlene Kühlflüssig-
keit:
Hochwertiges
Frostschutzmittel auf
Äthylenglykolbasis mit
Korrosionsschutz-
Additiv für
Aluminiummotoren
Mischverhältnis Wasser
2/Frostschutzmittel 1:
50%/50%
Kühlmittel-Füllmenge:
0,99 L
(0,87 Imp qt, 1,05 US qt)
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:
Boulon de vidange du liquide de
refroidissement 1
3. Déposer:
Bouchon de radiateur
Vidanger entièrement le liquide
de refroidissement.
4. Nettoyer:
Circuit de refroidissement
Rincer soigneusement le circuit
de refroidissement à l’eau claire.
5. Monter:
Rondelle en cuivre
Boulon de vidange du liquide de
refroidissement
T R..10 Nm (1,0 m · kg, 7,2 ft · lb)
6. Remplir:
Radiateur
Moteur
au niveau spécifié.
Liquide de refroidissement
recommandé:
Antigel à l’éthylène
glycol de haute qualité
contenant un agent
anticorrosion pour
moteurs en aluminium
Rapport de mélange liquide
de refroidissement 1 et
eau (eau douce) 2:
50%/50%
Quantité de liquide de
refroidissement:
0,99 L
(0,87 Imp qt, 1,05 US qt)
SOSTITUZIONE DEL
REFRIGERANTE
AVVERTENZA
Non togliere il coperchio del radiatore
a motore caldo.
ATTENZIONE:
Prestare attenzione a non rovesciare il
refrigerante su superfici verniciate. Se
si rovescia, toglierlo lavando con
acqua.
1. Collocare un recipiente sotto il
motore.
2. Togliere:
Tappo di scarico refrigerante 1
3. Togliere:
Coperchio del radiatore
Scaricare completamente il refri-
gerante.
4. Pulire:
Sistema di raffreddamento
Sciacquare accuratamente il
sistema di raffreddamento con
acqua di rubinetto pulita.
5. Installare:
Rondella di rame
Tappo di scarico refrigerante
T R..10 Nm (1,0 m · kg, 7,2 ft · lb)
6. Riempire:
Radiatore
Motore
Fino al livello indicato.
Refrigerante raccoman-
dato:
Antigelo glicole etilenico
di alta qualità con
anticorrosivo per motori
in alluminio.
Rapporto refrigerante 1 /
acqua (acqua dolce) 2:
50%/50%
Capacità refrigerante:
0,99 L
(0,87 Imp qt, 1,05 US qt)
CHANGEMENT DU LIQUIDE DE REFROIDISSEMENT
KÜHLFLÜSSIGKEIT WECHSELN
SOSTITUZIONE DEL REFRIGERANTE
3 - 6

3 - 7
INSP
ADJ
RADIATOR CAP INSPECTION
CAUTION:
Do not mix more than one type of ethyl-
ene glycol antifreeze containing corro-
sion inhibitors for aluminum engine.
Do not use water containing impurities or
oil.
7. Install:
Radiator cap
Start the engine and warm it up for a sev-
eral minutes.
8. Check:
Coolant level
Coolant level low → Add coolant. Handling notes of coolant:
The coolant is harmful so it should be han-
dled with special care.
WARNING
When coolant splashes to your eye.
Thoroughly wash your eye with water
and see your doctor.
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.
EC355000
RADIATOR CAP INSPECTION
1. Inspect:
Seal (radiator cap) 1
Valve and valve seat 2
Crack/damage → Replace.
Exist fur deposits 3 → Clean or replace.

3 - 8
INSP
ADJRADIATOR CAP OPENING PRESSURE INSPECTION/
COOLING SYSTEM INSPECTION
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.
3. Inspect:
Pressure
Impossible to maintain the specified pres-
sure for 10 seconds → Replace.
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/cm2, 15.6 psi)
COOLING SYSTEM INSPECTION
1. Inspect:
Coolant level
2. Attach:
Radiator cap tester 1 and adapter 2
3. Apply the specified pressure.
Radiator cap tester:
YU-24460-01/90890-01325
Radiator cap tester adapter:
YU-33984/90890-01352
Standard pressure:
180 kPa (1.8 kg/cm2, 25.6 psi)

3 - 9
INSP
ADJ
CLUTCH ADJUSTMENT
NOTE:
Do not apply pressure more than specified
pressure.
Radiator should be filled fully.
4. Inspect:
Pressure
Impossible to maintain the specified pres-
sure for 10 seconds → Repair.
Radiator 1
Radiator hose joint 2
Coolant leakage → Repair or replace.
Radiator hose 3
Swelling → Replace.
CLUTCH ADJUSTMENT
1. Check:
Clutch lever free play a
Out of specification → Adjust.
Clutch lever free play
a:
8 ~ 13 mm (0.31 ~ 0.51 in)
2. Adjust:
Clutch lever free play
NOTE:
Before adjustment, expose the adjuster by
moving the boot 3 and cap 4 away.
Make minute adjustment on the lever side
using the adjuster 5.
After adjustment, check proper operation of
clutch lever. Clutch lever free play adjustment steps:
Loosen the locknuts 1.
Turn the adjuster 2 until free play a is
within the specified limits.
Tighten the locknuts.
T R..
Locknut:
4 Nm (0.4 m  kg, 2.9 ft  lb)

ENG
4 - 6
KÜHLER
Arbeitsumfang:
1 Kühler demontieren
ArbeitsumfangReihen-
folgeBauteil Anz. Bemerkungen
KÜHLER DEMONTIEREN
Vorbereitungsarbeiten Die Kühlflüssigkeit ablassen. Siehe unter “KÜHLFLÜSSIGKEIT WECHSELN” in
KAPITEL 3.
Sitzbank und Kraftstofftank Siehe unter “SITZBANK, KRAFTSTOFFTANK UND
SEITENABDECKUNGEN”.
1Kühlerschutz 2
2Kühler-Schlauchschelle 10 Lediglich lockern.
3Kühler-Schlauch 1 1
4Kühler links 1
5Kühler-Schlauch 3 1
6Kühlerrohr 2 1
7Kühler-Schlauch 5 1
8Kühler rechts 1
9Kühler-Schlauch 2 1
10 Kühler-Schlauch 4 1
11 Kühler-Entlüftungsschlauch 1
12 Kühlerrohr 1 1
1
RADIATEUR
Organisation de la dépose:1 Dépose du radiateur
Organisation de la dépose Ordre Nom de la pièce QtéRemarques
DEPOSE DU RADIATEUR
Préparation à la dépose Vidanger le liquide de refroidissement. Se reporter à la section “CHANGEMENT DU LIQUIDE
DE REFROIDISSEMENT” au CHAPITRE 3.
Selle et réservoir de carburant Se reporter à la section “SELLE, RESERVOIR DE CAR-
BURANT ET CACHES LATERAUX”.
1 Plaque de protection du radiateur 2
2 Collier de durit de radiateur 10 Desserrer uniquement.
3 Durit de radiateur 1 1
4 Radiateur gauche 1
5 Durit de radiateur 3 1
6 Tuyau de radiateur 2 1
7 Durit de radiateur 5 1
8 Radiateur droit 1
9 Durit de radiateur 2 1
10 Durit de radiateur 4 1
11 Durit de mise à l’air du radiateur 1
12 Tuyau de radiateur 1 1
1
RADIATORE
Estensione della rimozione:1 Rimozione del radiatore
Estensione della rimozione Ordine Denominazione QuantitàOsservazioni
RIMOZIONE DEL RADIATORE
Preparazione per la rimozione Scaricare il refrigerante. Fare riferimento al paragrafo “SOSTITUZIONE DEL
REFRIGERANTE” nel CAPITOLO 3.
Sella e serbatoio del carburante Fare riferimento al paragrafo “SELLA, SERBATOIO
CARBURANTE E FIANCHETTI”.
1 Riparo radiatore 2
2 Giunto flessibile del radiatore 10 Allentare soltanto.
3 Flessibile radiatore 1 1
4 Radiatore sinistro 1
5 Flessibile radiatore 3 1
6 Tubo del radiatore 2 1
7 Flessibile radiatore 5 1
8 Radiatore destro 1
9 Flessibile radiatore 2 1
10 Flessibile radiatore 4 1
11 Flessibile di sfiato radiatore 1
12 Tubo del radiatore 1 1
1
RADIATEUR
KÜHLER
RADIATORE

4 - 7
ENGRADIATOR
EC456000
HANDLING NOTE
WARNING
Do not remove the radiator cap when the
engine and radiator are hot. Scalding hot
fluid and steam may be blown out under
pressure, which could cause serious
injury.
When the engine has cooled, open the radi-
ator cap by the following procedure:
Place a thick rag, like a towel, over the radi-
ator cap, slowly rotate the cap counter-
clockwise to the detent. This procedure
allows any residual pressure to escape.
When the hissing sound has stopped,
press down on the cap while turning coun-
terclockwise and remove it.
EC454000
INSPECTION
EC444100
Radiator
1. Inspect:
Radiator core 1
Obstruction → Blow out with compressed
air through rear of the radiator.
Bent fin → Repair/replace.
EC455000
ASSEMBLY AND INSTALLATION
Radiator
1. Install:
O-ring 1
Radiator pipe 1 2
Bolt (radiator pipe) 3
NOTE:
Apply the lithium soap base grease on the O-
ring.
2. Install:
Radiator breather hose 1
Radiator hose 2 2
Radiator hose 3 3
Radiator pipe 2 4
Radiator hose 5 5
Radiator hose 4 6
To right radiator 7.
1
3 2
B
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
2
1
67
3
4
5