2007 YAMAHA WR 450F oil

4 - 108
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
3. Install:
Plain washer 1
Circlip 2
NOTE:
Be sure the circlip sharp-edged corner a is
positioned opposite side to the plain washer
and gear b.
Install the circlip with its ends c settled
evenly on the spline crests.
cc
New
4. Install:
Collar 1
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
When installing the spacer into the crank-
case, pay careful attention to the crankcase
oil seal lip.
5. Install:
Shift fork 1 (L) 1
Shift fork 2 (C) 2
Shift fork 3 (R) 3
Shift cam 4
To main axle and drive axle.
NOTE:
Apply the molybdenum disulfide oil on the
shift fork grooves.
Mesh the shift fork #1 (L) with the 4th wheel
gear 5 and #3 (R) with the 5th wheel gear 7
on the drive axle.
Mesh the shift fork #2 (C) with the 3rd pinion
gear 6 on the main axle.

4 - 109
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
6. Install:
Transmission assembly 1
To crankcase (left) 2.
NOTE:
Apply the engine oil on the bearings and guide
bars.
7. Check:
Shifter operation
Transmission operation
Unsmooth operation → Repair.

5 - 1
CHAS
EC500000
CHASSIS
EC590000
FRONT WHEEL AND REAR WHEEL
EC598000
FRONT WHEEL
FRONT WHEEL AND REAR WHEEL
Extent of removal:
1 Front wheel removal
2 Wheel bearing removal
3 Brake disc removal
Extent of removal Order Part name Q’ty Remarks
FRONT WHEEL REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over.
Preparation for removal Hold the machine by placing the
suitable stand under the engine.
1 Bolt (axle holder) 4 Only loosening.
2 Nut (front wheel axle) 1
3 Front wheel axle 1
4 Front wheel 1
5 Speed sensor 1
6 Collar 1
7 Oil seal 1
8 Bearing 2 Refer to “REMOVAL POINTS”.
9 Brake disc 1
2
13
3

5 - 2
CHAS
EC598100
REAR WHEEL
Extent of removal:
1 Rear wheel removal
2 Wheel bearing removal
3 Brake disc removal
Extent of removal Order Part name Q’ty Remarks
REAR WHEEL REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over.
Preparation for removal Hold the machine by placing the
suitable stand under the engine.
1 Nut (rear wheel axle) 1
2 Rear wheel axle 1
3 Chain puller 2
4 Rear wheel 1 Refer to “REMOVAL POINTS”.
5 Collar 2
6 Driven sprocket 1
7 Oil seal 2
8 Circlip 1
9 Bearing 2 Refer to “REMOVAL POINTS”.
10 Brake disc 1
3
3
1
2
FRONT WHEEL AND REAR WHEEL

5 - 3
CHASFRONT WHEEL AND REAR WHEEL
EC593000
REMOVAL POINTS
EC523101
Rear wheel
1. Remove:
Wheel 1
NOTE:
Push the wheel forward and remove the drive
chain 2.
EC513201
Wheel bearing (if necessary)
1. Remove:
Bearing 1
NOTE:
Remove the bearing using a general bearing
puller 2.
EC594000
INSPECTION
EC514100
Wheel
1. Measure:
Wheel runout
Out of limit → Repair/replace.
2. Inspect:
Bearing
Rotate inner race with a finger.
Rough spot/seizure → Replace.
NOTE:
Replace the bearings, oil seal and wheel collar
as a set.
Wheel runout limit:
Radial
1: 2.0 mm (0.08 in)
Lateral
2: 2.0 mm (0.08 in)

5 - 3
CHAS
DEMONTAGE-EINZELHEITEN
Hinterrad
1. Demontieren:
Rad
1
HINWEIS:
Das Hinterrad nach vorn drücken
und die Antriebskette
2 abnehmen.
Radlager (nach Bedarf)
1. Demontieren:
Lager
1
HINWEIS:
Das Lager mit einem Lageraustreiber
2 ausbauen.
KONTROLLE
Rad
1. Messen:
Felgenschlag
Nicht nach Vorgabe
→ Instand
setzen/erneuern.
Max. Felgenschlag:
Höhenschlag 1:
2,0 mm (0,08 in)
Seitenschlag 2:
2,0 mm (0,08 in)
2. Kontrollieren:
Lager
Den Innenlaufring mit den Fin-
gern drehen.
Stockend/fest
→ Erneuern.
HINWEIS:
Lager, Dichtring und Distanzhülse
satzweise erneuern. POINTS DE DEPOSE
Roue arrière
1. Déposer:
Roue 1
N.B.:
Pousser la roue vers l’avant et déposer la
chaîne de transmission 2.
Roulement de roue (si nécessaire)
1. Déposer:
Roulement 1
N.B.:
Déposer le roulement à l’aide d’un arra-
che-roulement courant 2.
CONTROLE
Roue
1. Mesurer:
Voile de roue
Hors spécifications → Réparer/
remplacer.
Limite de voile de roue:
Radial 1:
2,0 mm (0,08 in)
Latéral 2:
2,0 mm (0,08 in)
2. Contrôler:
Roulement
Faire tourner la cage interne avec
le doigt.
Rugosité/grippage → Remplacer.
N.B.:
Remplacer ensemble les roulements, la
bague d’étanchéité et l’entretoise épau-
lée de roue.PUNTOS DE DESMONTAJE
Rueda trasera
1. Extraer:
Rueda 1
NOTA:
Empuje la rueda hacia adelante y des-
monte la cadena de transmisión 2.
Cojinete de rueda (si es necesario)
1. Extraer:
Cojinete 1
NOTA:
Extraiga el cojinete con un extractor
general de cojinetes 2.
COMPROBACIÓN
Rueda
1. Medir:
Descentramiento de la rueda
Fuera de límite → Reparar/cam-
biar.
Límite de descentramiento
de la rueda:
Radial 1:
2,0 mm (0,08 in)
Lateral 2:
2,0 mm (0,08 in)
2. Comprobar:
Cojinete
Gire la guía interior con un dedo.
Punto duro/agarrotamiento →
Cambiar.
NOTA:
Cambie el conjunto de cojinetes, junta de
aceite y manguito de la rueda.
ROUE AVANT ET ROUE ARRIERE
VORDER- UND HINTERRAD
RUEDA DELANTERA Y RUEDA TRASERA

5 - 4
CHAS
Radachse
1. Messen:
Radachs-Verbiegung
Nicht nach Vorgabe
→ Erneu-
ern.
Eine Messuhr
1 verwenden.
HINWEIS:
Der von der Messuhr angezeigte
Wert ist zu halbieren, um den Wert
der Verbiegung zu erhalten.
WARNUNG
Eine verbogene Radachse darf
unter keinen Umständen gerichtet
werden.
Max. Radachs-Verbie-
gung:
0,5 mm (0,020 in)
Bremsscheibe
1. Messen:
Bremsscheiben-Verzug (nur
Hinterrad)
Eine Messuhr
1 verwenden.
Nicht nach Vorgabe
→ Fel-
genschlag kontrollieren.
Falls Felgenschlag in Ordnung
ist, die Bremsscheibe erneu-
ern.
2. Messen:
Bremsscheiben-Stärke
a
Nicht nach Vorgabe
→ Erneu-
ern.
Max. Bremsscheiben-
Verzug:
Standard
Hinten—0,15 mm
(0,006 in)
Min. Bremsscheiben-
Stärke:
Standard
Vorn3,0 mm
(0,12 in)2,5 mm
(0,10 in)
Hinten4,0 mm
(0,16 in)3,5 mm
(0,14 in)
Axe de roue
1. Mesurer:
Déformations de l’axe de roue
Hors spécifications → Rempla-
cer.
Utiliser le comparateur à cadran
1.
N.B.:
La valeur de flexion est égale à la moitié
de la valeur affichée sur le comparateur à
cadran.
AVERTISSEMENT
Ne pas tenter de redresser un axe
déformé.
Limite de flexion d’axe de
roue:
0,5 mm (0,020 in)
Disque de frein
1. Mesurer:
Déflexion du disque de frein (dis-
que de frein arrière seulement)
Utiliser le comparateur à cadran
1.
Hors spécifications → Contrôler
le voile de roue.
Si le voile de roue est normal,
remplacer le disque de frein.
2. Mesurer:
Epaisseur du disque de frein a
Hors spécifications → Rempla-
cer.
Limite de déflexion du dis-
que de frein:
Standard
Arrière—0,15 mm
(0,006 in)
Limite d’usure du disque de
frein:
Standard
Avant3,0 mm
(0,12 in)2,5 mm
(0,10 in)
Arrière4,0 mm
(0,16 in)3,5 mm
(0,14 in)
Eje de la rueda
1. Medir:
Flexión del eje de la rueda
Fuera del valor especificado →
Cambiar.
Utilice la galga de cuadrante 1.
NOTA:
El valor de flexión se muestra en una
mitad de la lectura de la galga de cua-
drante.
ADVERTENCIA
No trate de enderezar un eje doblado.
Límite de flexión del eje de
la rueda:
0,5 mm (0,020 in)
Disco de freno
1. Medir:
Deflexión del disco de freno (solo
el disco de freno trasero)
Utilice la galga de cuadrante 1.
Fuera del valor especificado →
Comprobar el descentramiento de
la rueda.
Si el descentramiento es correcto,
cambie el disco de freno.
2. Medir:
Espesor del disco de freno a
Fuera de límite → Cambiar.
Límite de deflexión del
disco:
Estándar
Tra-
sero—0,15 mm
(0,006 in)
Límite de desgaste del
disco:
Estándar
Delan-
tero3,0 mm
(0,12 in)2,5 mm
(0,10 in)
Tra-
sero4,0 mm
(0,16 in)3,5 mm
(0,14 in)
ROUE AVANT ET ROUE ARRIERE
VORDER- UND HINTERRAD
RUEDA DELANTERA Y RUEDA TRASERA

5 - 5
CHASFRONT WHEEL AND REAR WHEEL
EC595000
ASSEMBLY AND INSTALLATION
Front wheel
1. Install:
Bearing (left) 1
Spacer 2
Bearing (right) 3
Oil seal 4
NOTE:
Apply the lithium soap base grease on the
bearing and oil seal lip when installing.
Use a socket that matches the outside diam-
eter of the race of the bearing.
Left side of bearing shall be installed first.
Install the oil seal with its manufacture’s
marks or numbers facing outward.
CAUTION:
Do not strike the inner race of the bearing.
Contact should be made only with the outer
race.
2. Install:
Brake disc 1
Bolt (brake disc) 2
NOTE:
Tighten the bolts in stage, using a crisscross
pattern.
New
T R..12 Nm (1.2 m · kg, 8.7 ft · lb)
3. Install:
Collar 1
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
4. Install:
Speed sensor 1
NOTE:
Apply the lithium soap base grease on the oil
seal lip of the speed sensor.
Make sure the two projections a in the
wheel hub are meshed with the two slots b
in the speed sensor.
b a1
B