transmission oil YAMAHA YZ250LC 2001 Notices Demploi (in French)

EC085002
ILLUSTRATED SYMBOLS
(Refer to the illustration)
Illustrated symbols 1to 7are designed as
thumb tabs to indicate the chapter’s number and
content.
1
General information
2Specifications
3Regular inspection and adjustments
4Engine
5Chassis
6Electrical
7Tuning
Illustrated symbols 8to rare used to identify
the specifications appearing in the text.
8
With engine mounted
9Special tool
0Filling fluid
qLubricant
wTightening
eSpecified value, Service limit
rResistance (½), Voltage (V), Electric current (A)
Illustrated symbols tto oin the exploded dia-
grams indicate grade of lubricant and location of
lubrication point.
t
Apply transmission oil
yApply engine mixing oil
uApply molybdenum disulfide oil
iApply lightweight lithium-soap base grease
oApply molybdenum disulfide grease
Illustrated symbols pto ain the exploded dia-
grams indicate where to apply a locking agent
and where to install new parts.
p
Apply locking agent (LOCTITER)
aUse new one
GEN
INFO
12
3
5
74
6
8
90
qw
er
tyu
io
pa
SPEC
INSP
ADJENG
CHASELEC
TUN
5MW-9-30-0 7/5/00 2:15 PM Page 14

ABGEBILDETEN SYMBOLE
(Siehe Abbildung)
Die abgebildeten Symbole 1bis 7
sind zur einfachen Auffindung der Sei-
ten mit Daumeneinkerbungen verse-
hen. Die Abschnittsnummer sowie der
lnhalt können sofort ersehen werden.
1Allgemein Angaben
2Technische Daten
3Regelmäßige Prüfung und
Einstellungen
4Motor
5Fahrgestell
6Elektrische Einrichtungen
7Tuning
Die abgebildeten Symbole von 8bis
rwerden zur Unterscheidung der
Spezifikationen in diesem Text
benutzt.
8Mit dem Motor eingebaut
9Spezialwerkzeug
0Einfüllen von Flüssigkeit
qSchmiermittel
wFestziehen (Anzugsmoment)
eVerschleißgrenze, Wartungs-
Toleranzgrenze
rWiderstand (½), Spannung (V),
elektrischer Strom (A)
Die abgebildeten Symbole tbis oin
der Explosionszeichnung zeigen die
Schmierstoffklasse sowie die
Schmierstellen an.
tGetriebeöl auftragen
yMotor-Mischöl auftragen
uMolybdändisulfid-Öl auftragen
iLeichtes Lithium-Fett auftragen
oMolybdändisulfid-Fett auftragen
Die abgebildeten Symbole pbis ain
der Explosionszeichnung zeigen die
Stellen, wo Sicherungslack aufzutra-
gen ist und neue Teile einzubauen
sind.
pSicherungslack (LOCTITE®)
auftragen
aNeues Teil verwenden
SYMBOLES GRAPHIQUES
(Voir l’illustration)
Les symboles graphiques 1à 7ser-
vent à repérer les différents chapitres et
à indiquer leur contenu.
1Renseignements généraux
2Caracteristiques
3Verification et réglages courants
4Moteur
5Partie cycle
6Partie électrique
7Mise au point
Les symboles graphiques 8á rper-
mettent d’identifier les spécifications
encadrées dans le texte.
8Avec de montage du moteur
9Outil spécial
0Liquide de remplissage
qLubrifiant
wSerrage
eValeur spécifiée, limite de service
rRésistance (½), tension (V), intensité (A)
Les symboles graphiques tà odans
les vues éclatées indiquent le grade de
lubrifiant et l’emplacement des points
de lubrification.
tAppliquer de l’huile de transmissionyAppliquer de l’huile de mélange du moteuruAppliquer de l’huile au bisulfure de molybdèneiAppliquer de la graisse fluide à base de savon
au lithium
oAppliquer de la graisse au bisulfure de
molybdène
Les symboles graphiques pet adans
les vues éclatées indiquent où appliquer
de l’agent bloquant et où installer de
nouveaux composants.
pAppliquer un agent de blocage
(LOCTITE®)
aUtiliser une pièce neuve
IC085002
SIMBOLI ILLUSTRATI
(Fare riferimento all’illustra-
zione)
I simboli illustrati da 1a 7sono pro-
gettati come linguette da sfogliare che
indichino il numero e il contenuto del
capitolo.
1Informazioni generali
2Specifiche
3Ispezione e regolazioni regolari
4Motore
5Telaio
6Parte elettrica
7Messa a punto
I simboli illustrati da 8a rvengono
usati per identificare le specifiche che
compaiono nel testo.
8Con motore montato
9Utensile speciale
0Liquido di riempimento
qLubrificante
wSerraggio
eValore specificato, limite di servizio
rResistenza (½), Tensione (V), Corrente
elettrica (A)
I simboli da ta oillustrati nei dia-
grammi esplosi indicano la qualità di
lubrificante e la posizione del punto di
lubrificazione.
tApplicare olio per trasmissioneyApplicare olio per miscela per motoriuApplicare olio a base di bisolfuro di molibdenoiApplicare grasso leggero a base di sapone di
litio
oApplicare grasso a base di bisolfuro di
molibdeno
I simboli pe aillustrati nei diagram-
mi esplosi indicano dove applicare
l’agente bloccante e dove montare il
pezzo di ricambio.
pApplicare agente bloccante
(LOCTITE®)
aUsare un pezzo nuovo
5MW-9-30-0 7/5/00 2:15 PM Page 15

1-1
DESCRIPTION
GEN
INFO
EC100000
GENERAL INFORMATION
EC110000
DESCRIPTION
1Clutch lever
2“ENGINE STOP” button
3Front brake lever
4Throttle grip
5Radiator cap
6Fuel tank cap
7Kick starter
8Fuel tank
9Radiator
0Coolant drain bolt
qCheck bolt (Transmission oil level)
wRear brake pedal
eValve joint
rFuel cock
tStarter knob
yDrive chain
uAir cleaner
iShift pedal
oFront fork
NOTE:
9The machine you have purchased may differ
slightly from those shown in the following.
9Designs and specifications are subject to
change without notice.
1
5MW-9-30-1 7/3/00 1:36 PM Page 2

2-1
GENERAL SPECIFICATIONSSPEC
Model name: YZ250LC (EUROPE)
YZ250N1 (USA)
YZ250(N) (CDN, AUS, NZ, ZA)
Model code number: 5MW1 (USA, CDN, ZA)
5MW2 (EUROPE)
5MW4 (AUS, NZ)
Dimensions: USA, CDN, ZA EUROPE AUS, NZ
Overall length 2,179 mm 2,178 mm 2,179 mm
(85.8 in) (85.7 in) (85.8 in)
Overall width 827 mm¬¬
(32.6 in)
Overall height 1,307 mm 1,302 mm 1,303 mm
(51.5 in) (51.3 in) (51.3 in)
Seat height 989 mm¬¬
(38.9 in)
Wheelbase 1,482 mm¬¬
(58.3 in)
Minimum ground clearance 392 mm 391 mm 392 mm
(15.4 in) (15.4 in) (15.4 in)
Basic weight:
With oil and full fuel tank 104.5 kg (230 lb)
Engine:
Engine type Liquid cooled 2-stroke, gasoline
Cylinder arrangement Single cylinder, forward inclined
Displacement 249 cm
3(8.76 lmp oz, 8.42 US oz)
Bore ´Stroke 66.4 ´72 mm (2.614 ´2.835 in)
Compression ratio 9.1~10.6 : 1
Starting system Kick starter
Lubrication system: Premix (30 : 1)(Yamalube 2-R)
Oil type or grade (2-Cycle):
Transmission oil Yamalube 4 (10W-30) or SAE 10W-30 type SE
motor oil
Periodic oil change 0.75 L (0.66 Imp qt, 0.79 US qt)
Total amount 0.80 L (0.70 Imp qt, 0.85 US qt)
Coolant capacity (including all routes): 1.20 L (1.06 Imp qt, 1.27 US qt)
Air filter: Wet type element
Fuel:
Type Except for AUS: Premium unleaded fuel
with a research octane
number of 95 or higher
For AUS: Unleaded fuel only
Tank capacity 8.0 L (1.76 Imp gal, 2.11 US gal)
EC200000
SPECIFICATIONSEC211000
GENERAL SPECIFICATIONS
2
5MW-9-30-2 7/3/00 2:19 PM Page 2

2-2
GENERAL SPECIFICATIONSSPEC
Carburetor:
Type/Manufacturer PWK38S/KEIHIN
Spark plug:
Type/Manufacturer BR8EG/NGK
Gap 0.5~0.6 mm (0.020~0.024 in)
Clutch type: Wet, multiple-disc
Transmission:
Primary reduction system Gear
Primary reduction ratio 63/21 (3.000)
Secondary reduction system Chain drive
Secondary reduction ratio 50/14 (3.571)
Transmission type Constant mesh, 5-speed
Operation Left foot operation
Gear ratio: 1st 27/14 (1.929)
2nd 25/16 (1.563)
3rd 23/18 (1.278)
4th 24/22 (1.091)
5th 20/21 (0.952)
Chassis:USA, CDN, ZA, AUS, NZEUROPE
Frame type Semi double cradle¬
Caster angle 27.2° 26.9°
Trail 118 mm (4.65 in) 115 mm (4.53 in)
T ire:
Type With tube
Size (front) 80/100-21 51M
Size (rear) 110/90-19 62M
T ire pressure (front and rear) 100 kPa (1.0 kg/cm2, 15 psi)
Brake:
Front brake type Single disc brake
Operation Right hand operation
Rear brake type Single disc brake
Operation Right foot operation
Suspension:
Front suspension Telescopic fork
Rear suspension Swingarm (link type monocross suspension)
Shock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/Gas, oil damper
Wheel travel:
Front wheel travel 300 mm (11.8 in)
Rear wheel travel 315 mm (12.4 in)
Electrical:
Ignition system CDI magneto
2
5MW-9-30-2 7/3/00 2:19 PM Page 3

2-4
MAINTENANCE SPECIFICATIONSSPEC
Item Standard Limit
Transmission:
Main axle deflection limit…
0.01 mm (0.0004 in)
Drive axle deflection limit…
0.01 mm (0.0004 in)
Shifter:
Shifting type Cam drum and guide bar…
Guide bar bending limit…
0.05 mm (0.0020 in)
Kick starter type: Kick and ratchet type…
Air filter oil grade (oiled filter):Foam-air-filter oil or engine mixing oil…
Carburetor:USA, CDN, ZA,
EUROPE
AUS, NZ
Type/Manufacturer
PWK38S/KEIHIN¬…
I.D. mark 5MW00 5MW10…
Main jet (M.J.) #178 #180…
Main air jet (M.A.J) #200¬…
Jet needle-clip position (J.N.) N3EJ-2 N3CW-3…
Main nozzle (N.J.) ø2.9¬…
Cutaway (C.A.) #7¬…
Pilot jet (P.J.) #50 #55…
Pilot air screw (P.A.S.) 1 1-3/4…
(for reference only)
Valve seat size (V.S.)
ø3,8 mm (0,15 in)¬…
Starter jet (G.S.) #85¬…
Power jet (P.W.J.) #50 #55 …
Float arm height (F.H.) 5.5~7.5 mm¬…
(0.22~030 in)
Reed valve:
Thickness* 0.42 mm (0.017 in)…
Valve stopper height 10.3~10.7 mm (0.406~0.421 in)…
Valve bending limit…
0.2 mm (0.008 in)
Cooling:
Radiator core size:
Width 110 mm (4.33 in)…
Height 240 mm (9.45 in)…
Thickness 32 mm (1.26 in)…
Radiator cap opening pressure 95~125 kPa…
(0.95~1.25 kg/cm
2, 13.5~17.8 psi)
Radiator capacity (total) 0.64 L (0.56 Imp qt, 0.68 US qt)…
Water pump:
Type Single-suction centrifugal pump…
5MW-9-30-2 7/3/00 2:20 PM Page 5

2-8
CARACTERISTIQUES D’ENTRETIENSPEC
Article Standard Limite
Roue:
Type de roue avant Roue à rayons…
Type de roue arrière Roue à rayons…
Taille/matériau de jante avant 21 ´1,60/Aluminum…
Taille/matériau de jante arrière 19 ´2,15/Aluminum…
Limite de voile de jante:
Radial…
2,0 mm (0,08 in)
Latéral…
2,0 mm (0,08 in)
Chaîne de transmission:
Type/fabricant DID520DMA2 SDH/DAIDO…
Nombre de maillons 113 maillons + attache…
Flèche de la chaîne 40~50 mm (1,6~2,0 in)…
Longueur de chaîne (10 maillons)…
152,5 mm (6,004 in)
Frein à disque avant:
Dia. extérieur ´épaisseur 250 ´3,0 mm (9,84 ´0,12 in)…
Epaisseur de plaquette 4,4 mm (0,17 in) 1,0 mm (0,04 in)
Dia. intérieur de maître-cylindre 11,0 mm (0,433 in)…
Dia. intérieur de cylindre d’etrier 27,0 mm (1,063 in) ´2…
Type de liquide de frein DOT #4…
Frein à disque arrière:
Dia. extérieur ´épaisseur 240 ´4,0 mm (9,45 ´0,16 in)…
Limite de flèche…
0,15 mm (0,006 in)
Epaisseur de plaquette 6,4 mm (0,25 in) 1,0 mm (0,04 in)
Dia. intérieur de maître-cylindre 12,7 mm (0,500 in)…
Dia. intérieur de cylindre d’etrier 27,0 mm (1,063 in)…
Type de liquide de frein DOT #4…
Levier de frein & pédale de frein:
Position du levier de frein 95 mm (3,74 in)…
Hauteur de la pédale de frein 5 mm (0,20 in)…
(hauteur au-dessus du haut du repose-pied)
Jeu de levier d’embrayage 2~4 mm (0,08~0,16 in)…
(au pivot du levier)
Jeu à la poignée d’accélération 3~5 mm (0,12~0,20 in)…
5MW-9-30-2 7/3/00 2:21 PM Page 21

2-13
CABLE ROUTING DIAGRAMSPEC
EC240000
CABLE ROUTING DIAGRAM
1Cable guide
2Clamp
3“ENGINE STOP” button lead
4Throttle cable
5TPS (throttle position sensor)
lead
6Solenoid valve lead
7CDI unit
8CDI unit stay
9CDI unit band
0Air vent hose (left)
qTransmission oil breather hose
wOverflow hose
eAir vent hose (right)APass the throttle cable and
“ENGINE STOP” button lead into
the cable guide. Align with the
cable guide the front end of the
tape on the throttle cable.
BClamp the throttle cable,
“ENGINE STOP” button lead and
CDI unit lead with the clamp
ends downward.
CPass the throttle cable, “ENGINE
STOP” button lead and CDI unit
lead over the radiator hose.
DClamp the clutch cable, throttle
cable, “ENGINE STOP” button
lead, TPS (throttle position sen-
sor) lead and solenoid valve lead
with the clamp ends downward.
In so doing, clamp the “ENGINE
STOP” button lead at its protect-
ing tube.
EClamp the clutch cable so that
the clamp passes with its ends
downward, as shown.
FPass the TPS (throttle position
sensor) lead and solenoid valve
lead through the cable guide.GClamp the TPS (throttle position
sensor) lead and solenoid valve
lead to the frame with the clamp
ends backward.
HPass the solenoid valve lead
through the carburetor clamp.
IPass the air vent hoses, overflow
hose and transmission oil
breather hose between the frame
and connecting rod.
JFit the CDI unit into the CDI unit
stay till it stops.
KInsert the CDI unit into the CDI
unit band till it stops.
LPass the TPS (throttle position
sensor) lead and solenoid valve
lead under the damper.
MClamp the air vent hoses.
NPass the air vent hoses, overflow
hose and transmission oil
breather hose so that all these
hoses do not contact the rear
shock absorber.
5MW-9-30-2 7/3/00 2:24 PM Page 50

INSP
ADJ
3-1
MAINTENANCE INTERVALS
EC300000
REGULAR INSPECTION AND ADJUSTMENTS
EC310012
MAINTENANCE INTERVALS
The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind
that such factors as weather, terrain, geographical location, and individual usage will alter the required
maintenance and lubrication intervals. If you are a doubt as to what intervals to follow in maintaining
and lubricating your machine, consult your Yamaha dealer.
Item Remarks
PISTON
Inspect and cleanllInspect crack
ReplacellRemove carbon
PISTON RING
InspectllCheck ring end gap
Replacell
PISTON PIN, SMALL END BEARING
Inspectl
Replacel
CYLINDER HEAD
Inspect and cleanllRemove carbon
RetightenllCheck gasket
CYLINDER
Inspect and cleanllInspect score marks
ReplacelInspect wear
YPVS
Inspect and cleanll
CLUTCHInspect housing, friction
Inspect and adjustllplate, clutch plate and
Replacelspring
TRANSMISSION
Replace oilllYamalube 4 (10W-30) or
InspectlSAE 10W30 SE motor oil
Replace bearingl
SHIFT FORK, SHIFT CAM, GUIDE BAR
InspectlInspect wear
ROTOR NUT
Retightenll
MUFFLER
Inspectll
Cleanl
CRANK
Inspect and cleanll
CARBURETOR
Inspect, adjust and cleanll
SPARK PLUG
Inspect and cleanll
Replacel
DRIVE CHAIN Use chain lube
Lubricate, slack, alignmentllChain slack: 40~50 mm
Replacel(1.6~2.0 in)
After
break-
inEvery
raceEvery
thirdEvery
fifthAs re-
quired
3
5MW-9-30-3A 7/3/00 2:46 PM Page 2

3-4
PRE-OPERATION INSPECTION AND MAINTENANCE
INSP
ADJ
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.
EC321000
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
Coolant Check that coolant is filled up to the radiator filler cap.
Check the cooling system for leakage.P3-5~9
Fuel Check that a fresh mixture of oil and gasoline is filled in
the fuel tank. Check the fuel line for leakage.P1-12
Transmission oil Check that the oil level is correct. Check the crankcase
for leakage.P3-12~14
Gear shifter and clutch Check that gears can be shifted correctly in order and
that the clutch operates smoothly.P3-9
Throttle grip/Housing Check that the throttle grip operation and free play
are correctly adjusted. Lubricate the throttle grip and P3-10~11
housing, if necessary.
Brakes Check the play of front brake and effect of front and
rear brake.P3-17~23
Chain Check chain slack and alignment. Check that the chain
is lubricated properly.P3-24~26
Wheels Check for excessive wear and tire pressure. Check for
loose spokes and have no excessive play.P3-34~35
Steering Check that the handlebar can be turned smoothly and
have no excessive play.P3-35~36
Front forks and Check that they operate smoothly and there is no oil
rear shock absorber leakage.P3-26~33
Cables (wires) Check that the clutch and throttle cables move smooth-
ly. Check that they are not caught when the handlebars —
are turned or when the front forks travel up and down.
Muffler Check that the muffler is tightly mounted and has no
cracks.P3-15~16
Sprocket Check that the driven sprocket tightening bolt is
not loose.P3-24
Lubrication Check for smooth operation. Lubricate if necessary. P3-37
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P1-16
Lead connectors Check that the CDI magneto, CDI unit, and ignition coil
are connected tightly.P1-6
Settings Is the machine set suitably for the condition of the
racing course and weather or by taking into account the
P7-1~24
results of test runs before racing? Are inspection and
maintenance completely done?
5MW-9-30-3A 7/3/00 2:47 PM Page 14