maintenance YAMAHA WR 450F 2003 Owner's Manual

SPEC

2 - 19
MAINTENANCE SPECIFICATIONS
NOTE:

Tighten the rotor nut to 65 Nm (6.5 m·kg, 47 ft·lb), loosen and retighten the rotor nut to 65 Nm
(6.5 m·kg, 47 ft·lb). Starter relay:
Model/manufacturer 2768090-A/JIDECO ----
Amperage rating 180 A ----
Coil winding resistance 4.2 ~ 4.6
Ω
at 20 ˚C (68 ˚F) ----
Starting circuit cut-off relay:
Model/manufacturer ACM33221 M06/MATSUSHITA ----
Coil winding resistance 75.69 ~ 92.51
Ω
at 20 ˚C (68 ˚F) ----
Fuse (amperage
×
quantity):
Main fuse 10 A
×
1 ----
Reserve fuse 10 A
×
1 ----
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Stator M5
×
0.8 2 7 0.7 5.1
Holder (AC magneto lead) M5
×
0.8 2 7 0.7 5.1
Rotor M12
×
1.25 1 Refer to NOTE.
Neutral switch M5
×
0.8 2 4 0.4 2.9
Starter motor M6
×
1.0 2 10 1.0 7.2
Starter relay terminal M6
×
1.0 2 4 0.4 2.9 Item Standard Limit

3 - 1
INSP
ADJ

MAINTENANCE INTERVALS
EC300000
REGULAR INSPECTION AND ADJUSTMENTS
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.
ItemAfter
break-inEvery
race
Every
third
(or
500 km)Every
fifth
(or
1,000 km)
As re-
quiredRemarks
ENGINE OIL
Replace
●

●

VALVES
Check the valve clearances
Inspect
Replace
●

●

●

●
The engine must be cold.
Check the valve seats
and valve stems for wear.
VALVE SPRINGS
Inspect
Replace
●

●
Check the free length and
the tilt.
VALVE LIFTERS
Inspect
Replace
●

●
Check for scratches and
wear.
CAMSHAFTS
Inspect
Replace
●

●
Inspect the camshaft sur-
face.
Inspect the decompres-
sion system
CAMSHAFT SPROCKETS
Inspect
Replace
●

●
Check for wear on the
teeth and for damage.
PISTON
Inspect
Clean
Replace
●

●

●

●
Inspect crack
Inspect carbon deposits
and eliminate them.
PISTON RING
Inspect
Replace
●

●

●
Check ring end gap
PISTON PIN
Inspect
Replace
●

●

CYLINDER HEAD
Inspect and clean
●
Inspect carbon deposits
and eliminate them.
Change gasket
CYLINDER
Inspect and clean
Replace
●

●
Inspect score marks
Inspect wear
CLUTCH
Inspect and adjust
Replace
●

●

●
Inspect housing, friction
plate, clutch plate and
spring
TRANSMISSION
Inspect
Replace bearing
●

●

3 - 2
INSP
ADJ

MAINTENANCE INTERVALS
SHIFT FORK, SHIFT CAM, GUIDE BAR
Inspect
●
Inspect wear
ROTOR NUT
Retighten
●

●

MUFFLER
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 CHAIN
Lubricate, slack, alignment
Replace
●

●

●
Use chain lube
Chain slack: 40 ~ 50 mm
(1.57 ~ 1.97 in)
COOLING SYSTEM
Check coolant level and leakage
Check radiator cap operation
Replace coolant
Inspect hoses
●

●

●

●

●
Every two years
OUTSIDE NUTS AND BOLTS
Retighten
●

●
Refer to “STARTING
AND BREAK-IN” section
in the CHAPTER 1.
AIR FILTER
Clean and lubricate
Replace
●

●

●
Use foam air-filter oil or
equivalent oil
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 year ItemAfter
break-inEvery
race
Every
third
(or
500 km)Every
fifth
(or
1,000 km)
As re-
quiredRemarks


3

3 - 3
INSP
ADJ

MAINTENANCE INTERVALS
* marked: For USA
FRONT FORKS
Inspect and adjust
Replace oil
Replace oil seal
●

●

●

●

●
Suspension oil “01”
FRONT FORK OIL SEAL AND DUST
SEAL
Clean and lube
●

●
Lithium base grease
REAR SHOCK ABSORBER
Inspect and adjust
Lube
Retighten
●

●

●

●

●
(After
rain ride)
● Molybdenum disulfide
grease
CHAIN GUARD AND ROLLERS
Inspect
● ●
SWINGARM
Inspect, lube and retighten
● ● Molybdenum disulfide
grease
RELAY ARM, CONNECTING ROD
Inspect, lube and retighten
● ● Molybdenum disulfide
grease
STEERING HEAD
Inspect free play and retighten
Clean and lube
Replace bearing
● ●
●
● Lithium base grease
TIRE, WHEELS
Inspect air pressure, wheel run-out,
tire wear and spoke looseness
Retighten sprocket bolt
Inspect bearings
Replace bearings
Lubricate
●
●
●
●
●
●
●
Lithium base grease
THROTTLE, CONTROL CABLE
Check routing and connection
Lubricate
●
●
●
● Yamaha cable lube or
SAE 10W-30 motor oil
HOT STARTER, CLUTCH LEVER
Inspect free play
●
BATTERY
Check terminal for looseness and
corrosion
●
ItemAfter
break-inEvery
race
Every
third
(or
500 km)Every
fifth
(or
1,000 km)As re-
quiredRemarks

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 filler 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.1-14
Engine oilCheck that the oil level is correct. Check the crankcase and
frame oil line for leakage.P.3-14 ~ 18
Gear shifter and clutchCheck that gears can be shifted correctly in order and that the
clutch operates smoothly.P.3-10
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.3-26 ~ 32
ChainCheck chain slack and alignment. Check that the chain is lubri-
cated properly.P.3-33 ~ 36
WheelsCheck for excessive wear and tire pressure. Check for loose
spokes and have no excessive play.P.3-44 ~ 45
SteeringCheck that the handlebar can be turned smoothly and have no
excessive play.P.3-45 ~ 46
Front forks and rear shock
absorberCheck that they operate smoothly and there is no oil leakage. P.3-36 ~ 43
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.—
Muffler Check that the muffler is tightly mounted and has no cracks.—
Sprocket Check that the driven sprocket tightening bolt is not loose. P.3-33
Lubrication Check for smooth operation. Lubricate if necessary. P.3-47
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P.1-19
Lead connectorsCheck that the AC 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 - 12
INSP
ADJ
AIR FILTER CLEANING
AIR FILTER CLEANING
NOTE:
Proper air filter maintenance is the biggest key
to preventing premature engine wear and
damage.
CAUTION:
Never run the engine without the air filter
element in place; this would allow dirt and
dust to enter the engine and cause rapid
wear and possible engine damage.
1. Remove:
Air filter case cover 1
NOTE:
Loosen the quick screw 2 and draw the air fil-
ter case cover to remove it because its claws
a are inserted in the side cover as shown.
2. Unhook:
Binder 1
3. Remove:
Air filter element 1
Filter guide 2
4. Clean:
Air filter element
Clean them with solvent.
NOTE:
After cleaning, remove the remaining solvent
by squeezing the element.

5 - 54
CHASSWINGARM
EC573000
REMOVAL POINTS
EC573200
Bearing
1. Remove:
Bearing 1
NOTE:
Install the bearing by pressing its outer race.
EC574010
INSPECTION
Wash the bearings, bushes, collars, and cov-
ers in a solvent.
EC574111
Swingarm
1. Inspect:
Bearing 1
Bush 2
Free play exists/unsmooth revolution/
rust → Replace bearing and bush as a
set.
2. Inspect:
Oil seal 3
Damage → Replace.
EC574210
Relay arm
1. Inspect:
Bearing (polylube bearing) 1
Collar 2
Free play exists/unsmooth revolution/rust
→ Replace bearing and collar as a set.
2. Inspect:
Bearing (polylube bearing) 1
Loss of solid lubrication → Replace.
Oil seal 3
Damage → Replace.
NOTE:
Polylube bearings, with solid lubrication, have
been adopted with the intent to make the nee-
dle bearings, used in this model, maintenance
free. With polylube bearings, no grease nipple
and regular lubrication is necessary. However,
grease should be applied to all oil seals and
collars when removed or installed.

5 - 54
CHAS
BRAS OSCILLANT
SCHWINGE
PALANCA OSCILANTE
AUSBAU
Lager
1. Demontieren:
Lager 1
HINWEIS:
Das Lager am äußeren Laufring her-
auspressen.
PRÜFUNG
Die Lager, Buchsen, Hülsen und
Anlaufscheiben in Lösungsmittel
waschen.
Schwinge
1. Kontrollieren:
Lager 1
Buchse 2
Spiel/Schwergängigkeit/
Rost → Lager und Buchse
im Satz erneuern.
2. Kontrollieren:
Dichtring 3
Beschädigung → Erneuern.
Umlenkhebel
1. Kontrollieren:
Lager (Polylube-Lager) 1
Hülse 2
Spiel/Schwergängigkeit/
Rost → Lager und Hülse im
Satz erneuern.
2. Kontrollieren:
Lager (Polylube-Lager) 1
Verlust der Trockenschmie-
rung → Erneuern.
Dichtring 3
Beschädigung → Erneuern.
HINWEIS:
Polylube-Lager mit Trockenschmie-
rung werden eingesetzt, um die in
diesem Modell verwendeten Nadella-
ger wartungsfrei zu machen. Bei Po-
lylube-Lagern gibt es keine Schmier-
nippel, und regelmäßige Schmierung
ist nicht erforderlich. Es sollte aber
beim Ausbau oder Einbau Fett auf
alle Ölabdichtungen und Hülsen auf-
getragen werden. POINTS DE DEPOSE
Roulement
1. Déposer:
Roulement 1
N.B.:
Déposer le roulement en appuyant sur la
cage extérieure.
CONTROLE
Laver les roulements, les bagues, les col-
lerettes et les caches dans un dissolvant.
Bras oscillant
1. Contrôler:
Roulement 1
Bague 2
Jeu/rotation irrégulière/rouille
→ Changer à la fois le roule-
ment et la bague.
2. Contrôler:
Bague d’étanchéité 3
Endommagement → Changer.
Bras de relais
1. Contrôler:
Roulement (roulement poly-
lube) 1
Collerette 2
Jeu/rotation irrégulière/rouille
→ Changer à la fois le roule-
ment et la collerette.
2. Contrôler:
Roulement (roulement poly-
lube) 1
Perte de lubrification solide →
Remplacer.
Bague d’étanchéité 3
Endommagement → Changer.
N.B.:
Les roulements polylube, à lubrification
solide, ont été adoptés pour éliminer la
maintenance des roulements à aiguilles,
utilisés sur ce modèle. Les roulements
polylube rendent le graissage par les
graisseurs et le graissage ordinaire inuti-
les. Tous les colliers et joints à huile doi-
vent néanmoins être graissés lorsqu’ils
sont retirés ou installés. PUNTOS DE EXTRACCIÓN
Cojinete
1. Extraer:
Cojinete 1
NOTA:
Extraiga el cojinete empujando su pista
externa.
INSPECCIÓN
Lave los cojinetes, los manguitos, cas-
quillos y las cubiertas con un disolvente.
Palanca oscilante
1. Inspeccionar:
Cojinete 1
Manguito 2
Existe juego libre/vueltas brus-
cas/óxido → Reemplazar el
cojinete y el manguito como un
juego.
2. Inspeccionar:
Retén de aceite 3
Daños → Reemplazar.
Brazo intermedio
1. Inspeccionar:
Cojinete (cojinete de polilube) 1
Casquillo 2
Existe juego libre/vueltas brus-
cas/óxido → Reemplazar el
cojinete y el casquillo como un
juego.
2. Inspeccionar:
Cojinete (cojinete de polilube) 1
Pérdida de lubricación sólida
→ Reemplazar
Retén de aceite 3
Daños → Reemplazar.
NOTA:
Se ha optado por los cojinetes de pol-
ilube, con lubricación sólida, para que no
sea necesario hacer mantenimiento a los
cojinetes de aguja, utilizados en este
modelo. Con los cojinetes de polilube,
no son necesarios los engrasadores ni
lubricar regularmente. Sin embargo,
deberá aplicarse grasa a todos los retenes
de aceite y casquillos cuando se desmon-
ten o instalen.

5 - 55
CHASSWINGARM
EC574310
Connecting rod
1. Inspect:
Bearing (polylube bearing) 1
Collar 2
Free play exists/unsmooth revolution/rust
→ Replace bearing and collar as a set.
2. Inspect:
Bearing (polylube bearing) 1
Loss of solid lubrication → Replace.
Oil seal 3
Damage → Replace.
NOTE:
Polylube bearings, with solid lubrication, have
been adopted with the intent to make the nee-
dle bearings, used in this model, maintenance
free. With polylube bearings, no grease nipple
and regular lubrication is necessary. However,
grease should be applied to all oil seals and
collars when removed or installed.
EC575000
ASSEMBLY AND INSTALLATION
EC575201
Bearing and oil seal
1. Install:
Bearing 1
Oil seal 2
To swingarm.
NOTE:
Apply the molybdenum disulfide grease on
the bearing when installing.
Install the bearing by pressing it on the side
having the manufacture’s marks or numbers.
First install the outer and then the inner bear-
ings to a specified depth from inside.
Installed depth of bearings:
Outer a: Zero mm (Zero in)
Inner b: 8.5 mm (0.33 in)

5 - 55
CHAS
BRAS OSCILLANT
SCHWINGE
PALANCA OSCILANTE
Übertragungshebel
1. Kontrollieren:
Lager (Polylube-Lager) 1
Hülse 2
Spiel/Schwergängigkeit/
Rost → Lager und Hülse im
Satz erneuern.
2. Kontrollieren:
Lager (Polylube-Lager) 1
Verlust der Trockenschmie-
rung → Erneuern.
Dichtring 3
Beschädigung → Erneuern.
HINWEIS:
Polylube-Lager mit Trockenschmie-
rung werden eingesetzt, um die in
diesem Modell verwendeten Nadella-
ger wartungsfrei zu machen. Bei Po-
lylube-Lagern gibt es keine Schmier-
nippel, und regelmäßige Schmierung
ist nicht erforderlich. Es sollte aber
beim Ausbau oder Einbau Fett auf
alle Ölabdichtungen und Hülsen auf-
getragen werden.
ZUSAMMENBAU UND MONTAGE
Lager und Dichtringe
1. Montieren:
Lager 1
Dichtringe 2
(an der Schwinge)
HINWEIS:
Molybdändisulfidfett auf die einge-
bauten Lager auftragen.
Die Lager zum Einbauen auf der
Seite mit den Herstellerangaben
einpressen.
Zuerst die äußeren, dann die inne-
ren Lager vorschriftsmäßig eintrei-
ben.
Lager-Einbautiefe
Außen a: 0 mm
Innen b: 8,5 mm
Bielle
1. Contrôler:
Roulement (roulement poly-
lube) 1
Collerette 2
Jeu/rotation irrégulière/rouille
→ Changer à la fois le roule-
ment et la collerette.
2. Contrôler:
Roulement (roulement poly-
lube) 1
Perte de lubrification solide →
Remplacer.
Bague d’étanchéité 3
Endommagement → Changer.
N.B.:
Les roulements polylube, à lubrification
solide, ont été adoptés pour éliminer la
maintenance des roulements à aiguilles,
utilisés sur ce modèle. Les roulements
polylube rendent le graissage par les
graisseurs et le graissage ordinaire inuti-
les. Tous les colliers et joints à huile doi-
vent néanmoins être graissés lorsqu’ils
sont retirés ou installés.
REMONTAGE ET MONTAGE
Roulement et bague d’étanchéité
1. Monter:
Roulement 1
Bague d’étanchéité 2
Sur le bras oscillant.
N.B.:
Appliquer une graisse au bisulfure de
molybdène sur le roulement lors de la
repose.
Installer le roulement en appuyant sur
le côté où figurent les repères ou
numéros du fabricant.
Mettre d’abord les roulements exter-
nes puis les roulements internes en
place, à la protondeur spécifiée.
Protondeur d’installation
des roulements:
Externe a: 0 mm (0 in)
Interne b: 8,5 mm
(0,33 in)
Biela
1. Inspeccionar:
Cojinete (cojinete de polilube)
1
Casquillo 2
Existe juego libre/vueltas brus-
cas/óxido → Reemplazar el
cojinete y el casquillo como un
juego.
2. Inspeccionar:
Cojinete (cojinete de polilube)
1
Pérdida de lubricación sólida
→ Reemplazar
Retén de aceite 3
Daños → Reemplazar.
NOTA:
Se ha optado por los cojinetes de pol-
ilube, con lubricación sólida, para que no
sea necesario hacer mantenimiento a los
cojinetes de aguja, utilizados en este
modelo. Con los cojinetes de polilube,
no son necesarios los engrasadores ni
lubricar regularmente. Sin embargo,
deberá aplicarse grasa a todos los retenes
de aceite y casquillos cuando se desmon-
ten o instalen.
MONTAJE E INSTALACIÓN
Cojinete y retén de aceite
1. Instalar:
Cojinete 1
Retén de aceite 2
A la palanca oscilante.
NOTA:
Aplique grasa de disulfuro de molib-
deno en el cojinete cuando lo instale.
Instale el cojinete empujando en el
lado en el que tiene la marca del fabri-
cante o los números.
Instale en primer lugar los cojinetes
exteriores y después los interiores a la
profundidad especificada desde el
interior.
Profundidad de los cojine-
tes instalados:
Exterior a: 0 mm (0 in)
Interior b: 8,5 mm
(0,33 in)