2000 YAMAHA YZ426F transmission oil

4 - 87
ENGTRANSMISSION, SHIFT CAM, SHIFT FORK
EC4H4801
Shift fork, shift cam and segment
1. Inspect:
lShift fork 1
Wear/damage/scratches ® Replace.
2. Inspect:
lShift cam 1
lSegment 2
Bend/wear/damage ® Replace.
3. Check:
lShift fork movement
Unsmooth operation ® Replace shift
fork.
NOTE:
For a malfunctioning shift fork, replace not only
the shift fork itself but the two gears each adja-
cent to the shift fork.
EC4H5212
Transmission
1. Install:
l5th pinion gear (21T) 1
l3rd pinion gear (18T) 2
lCollar 3
l4th pinion gear (22T) 4
l2nd pinion gear (18T) 5
To main axle 6.
NOTE:
lApply the molybdenum disulfide oil on the
4th and 5th pinion gears inner circumference
and on the end surface.
lApply the molybdenum disulfide oil on the
2nd and 3rd pinion gears inner circumfer-
ence.

4 - 88
ENGTRANSMISSION, SHIFT CAM, SHIFT FORK
2. Install:
l2nd wheel gear (27T) 1
l4th wheel gear (24T) 2
l3rd wheel gear (23T) 3
l5th wheel gear (20T) 4
l1st wheel gear (24T) 5
lO-ring 6
To drive axle 7.
NOTE:
lApply the molybdenum disulfide oil on the
1st, 2nd and 3rd wheel gears inner circum-
ference and on the end surface.
lApply the molybdenum disulfide oil on the
4th and 5th wheel gears inner circumfer-
ence.
lApply the lithium soap base grease on the O-
ring.
3. Install:
lPlain washer 1
lCirclip 2
NOTE:
lBe sure the circlip sharp-edged corner a is
positioned opposite side to the plain washer
and gear b.
lBe sure the circlip end c is positioned at
axle spline groove d.
New
4. Install:
lSpacer 1
NOTE:
lApply the lithium soap base grease on the oil
seal lip.
lWhen installing the spacer into the crank-
case, pay careful attention to the crankcase
oil seal lip.

4 - 89
ENGTRANSMISSION, SHIFT CAM, SHIFT FORK
5. Install:
lShift fork 1 (L) 1
lShift fork 2 (C) 2
lShift fork 3 (R) 3
lShift cam 4
To main axle and drive axle.
NOTE:
lApply the molybdenum disulfide oil on the
shift fork grooves.
lMesh the shift fork #1 (L) with the 4th wheel
gear 5 and #3 (R) with the 5th wheel gear
7 on the drive axle.
lMesh the shift fork #2 (C) with the 3rd pinion
gear 6 on the main axle.
6. Install:
lTransmission assembly 1
To crankcase (left) 2.
NOTE:
Apply the engine oil on the bearings and guide
bars.
7. Check:
lShifter operation
lTransmission operation
Unsmooth operation ® Repair.

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.