2000 YAMAHA YZ426F oil

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
Break disc removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removal
FRONT WHEEL REMOVAL
Hold the machine by placing the
suitable stand under the engine.
1 Hose cover 1
2 Bolt (brake hose holder) 2 Only loosening.
3 Bolt (axle holder) 4 Only loosening.
4 Nut (front wheel axle) 1
5 Front wheel axle 1
6 Front wheel 1
7 Collar 2
8 Oil seal 2
9 Bearing 2 Refer to “REMOVAL POINTS”.
10Brake disk
1
WARNING
Support the machine securely so there is nodanger of it falling over.
2
31
3

5

5 - 2
CHAS

EC598100
REAR WHEEL
Extent of removal:
1
Rear wheel removal
2
Wheel bearing removal
3
Break disc removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removal
REAR WHEEL 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”.
10Brake disk
1
WARNING
Support the machine securely so there is nodanger of it falling over.
2
31
3

FRONT WHEEL AND REAR WHEEL

5 - 3
CHAS

FRONT WHEEL AND REAR WHEEL
EC593000
REMOVAL POINTS
EC523101
Rear wheel
1. Remove:
l
Wheel
1

NOTE:

Push the wheel forward and remove the drive
chain
2
.
EC513201
Wheel bearing (if necessary)
1. Remove:
l
Bearing
1

NOTE:

Remove the bearing using a general bearing
puller
2
.
EC594000
INSPECTION
EC514100
Wheel
1. Measure:
l
Wheel runout
Out of limit
®
Repair/replace.
2. Inspect:
l
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

ROUE AVANT ET ROUE ARRIERE
VORDER- UND HINTERRAD
AUSBAU
Hinterrad
1. Demontieren:
l
Rad
1

HINWEIS:

Das Rad nach vorne stoßen und die Antriebs-
kette
2
abnehmen.
Radlager (nach Bedarf)
1. Demontieren:
l
Lager
1

HINWEIS:

Die Lager mit einem Lageraustreiber
2
aus-
bauen.
PRÜFUNG
Rad
1. Messen:
l
Felgenschlag
Unvorschriftsmäßig
®
Instand setzen/
Erneuern.
Max. Felgenschlag
Höhenschlag
1
: 2,0 mm
Seitenschlag
2
: 2,0 mm
2. Kontrollieren:
l
Lager
Den inneren Laufring mit dem Finger
drehen.
Schwergängigkeit/Freßspuren
®

Erneuern.
HINWEIS:

Lager, Dichtringe und Hülse im Satz erneuern.
POINTS DE DEPOSE
Roue arrière
1. Déposer:
l
Roue
1

N.B.:

Pousser la roue vers l’avant et déposer la chaîne de
transmission
2
.
Roulement de roue (si nécessaire)
1. Déposer:
l
Roulement
1
N.B.:

Déposer le roulement en utilisant un arrache-roule-
ment courant
2
.
CONTROLE
Roue
1. Mesure:
l
Voile de roue
Hors limite
®
Réparer/changer.
Limite de voile de la roue:
Radial
1
: 2,0 mm (0,08 in)
Latéral
2: 2,0 mm (0,08 in)
2. Contrôler:
lRoulement
Faire tourner la bague intérieure avec le
doigt.
Point dur/grippage ® Changer.
N.B.:
Changer à la fois les roulements, la bague d’étan-
chéité et la collerette de roue.

5 - 4
CHAS
ROUE AVANT ET ROUE ARRIERE
VORDER- UND HINTERRAD
Radachse
1. Messen:
lRadachsschlag
Unvorschriftsmäßig ® Erneuern.
Die Meßuhr 1 verwenden.
HINWEIS:
Der Radachsschlag entspricht der Hälfte der
Meßuhranzeige.
WARNUNG
Nie versuchen, eine verbogene Achse zu
richten.
Max. Radachsschlag
0,5 mm
Bremsscheibe
1. Messen:
lBremsscheibenschlag
Die Meßuhr 1 verwenden.
Unvorschriftsmäßig ® Felgenschlag
prüfen.
Falls im Sollbereich, die Bremsscheibe
erneuern.
2. Messen:
lBremsscheibenstärke a
Unvorschriftsmäßig ® Erneuern.
Max. Bremsscheibenverzug
0,15 mm
Bremsscheiben-Mindeststärke
Standard
Vorn3,0 mm 2,5 mm
Hinten4,0 mm 3,5 mm
Axe de roue
1. Mesurer:
lLes flexions de l’axe de roue
Hors-spécification ® Changer.
Utiliser le comparateur 1.
N.B.:
La valeur de flexion est égale à la moitié de la lec-
ture du comparateur.
AVERTISSEMENT
Ne jamais tenter de redresser un axe tordu.
Limite de torsion de l’axe de roue:
0,5 mm (0,020 in)
Disque de frein
1. Mesurer:
lDéflexion de disque de frein
Utiliser le comparateur 1.
Hors spécification ® Examiner le voile de
roue.
Si le voile de la roue est normal, changer le
disque de frein.
2. Mesurer:
lEpaisseur de disque de frein a
Hors limite ® Changer.
Limite de déflexion de disque:
0,15 mm (0,006 in)
Limite d’usure de disque:
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)

5 - 5
CHAS

FRONT WHEEL AND REAR WHEEL
EC595000
ASSEMBLY AND INSTALLATION
EC595100
Front wheel
1. Install:
l
Bearing (left)
1

l
Spacer
2

l
Bearing (right)
3

l
Oil seal
4

NOTE:

l
Apply the lithium soap base grease on the
bearing and oil seal lip when installing.
l
Use a socket that matches the outside diam-
eter of the race of the bearing.
l
Left side of bearing shall be installed first.
l
Install the oil seal with its manufacture’s
marks or numbers facing outward.
ACHTUNG:CAUTION:
Do not strike the inner race of the bearing.
Contact should be made only with the outer
race.
2. Install:
lBrake disc 1
lBolt (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:
lCollar 1
NOTE:
lApply the lithium soap base grease on the oil
seal lip.
lInstall the collars with their projections a
facing the wheel.
4. Install:
lWheel
NOTE:
Install the brake disc 1 between the brake
pads 2 correctly.

5 - 7
CHASFRONT WHEEL AND REAR WHEEL
9. Install:
lHose cover 1
lPlain washer 2
lBolt [hose cover (M8)] 3
lBolt [hose cover (M6)] 4
T R..16 Nm (1.6 m · kg, 11 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
EC525112
Rear wheel
1. Install:
lBearing (right) 1
lCirclip 2
lSpacer 3
lBearing (left) 4
lOil seal 5
NOTE:
lApply the lithium soap base grease on the
bearing and oil seal lip when installing.
lInstall the bearing with seal facing outward.
lUse a socket that matches the outside diam-
eter of the race of the bearing.
lRight side of bearing shall be installed first.
lInstall the oil seal with its manufacture’s
marks or numbers facing outward.
ACHTUNG:CAUTION:
Do not strike the inner race of the bearing.
Contact should be made only with the outer
race.
New
New
2. Install:
lBrake disc 1
lBolt (brake disc) 2
NOTE:
Tighten the bolts in stage, using a crisscross
pattern.
1
1
1
1

2


1
3
5
2
4
6
T R..14 Nm (1.4 m · kg, 10 ft · lb)

5 - 25
CHASFRONT BRAKE AND REAR BRAKE
2. Install:
lBrake hose holder 1
lScrew (brake hose holder) 2
ACHTUNG:CAUTION:
After installing the brake hose holders,
make sure the brake hose does not contact
the spring (rear shock absorber). If it does,
correct its twist.
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
EC5A5600
Brake fluid
1. Fill:
lBrake fluid
Until the fluid level reaches “LOWER”
level line a.
WARNING
lUse only the designated quality brake
fluid:
otherwise, the rubber seals may deterio-
rate, causing leakage and poor brake per-
formance.
lRefill with the same type of brake fluid;
mixing fluids may result in a harmful chem-
ical reaction and lead to poor performance.
lBe careful that water does not enter the
master cylinder when refilling. Water will
significantly lower the boiling point of the
fluid and may result in vapor lock.
ACHTUNG:CAUTION:
Brake fluid may erode painted surfaces or
plastic parts. Always clean up spilled fluid
immediately.
Front
õRear
Recommended brake fluid:
DOT #4

õ