2002 YAMAHA YZ85 transmission oil

4 - 42
ENG
REMOVAL POINTS
Impeller shaft
1. Remove:
lImpeller 1
lWasher 2
lImpeller shaft 3
NOTE:
Hold the impeller shaft on its width across the
flats a with spanners, etc. and remove the
impeller.
5PA41250
EC4G3210
Oil seal
NOTE:
lIt is not necessary to disassemble the water
pump, unless there is an abnormality such
as excessive change in coolant level, discol-
oration of coolant, or milky transmission oil.
lReplace the oil seal whenever it is remov-
aled.
1. Remove:
lBearing 1
2. Remove:
lOil seal 1
5PA41260
5PA41270
INSPECTION
EC444200
Impeller shaft
1. Inspect:
lImpeller shaft 1
Bend/wear/damage ® Replace.
Fur deposits ® Clean.
5PA41280
WATER PUMP

4 - 57
ENG
Crankshaft
1. Install:
lCrankshaft 1
Use the crankshaft installing tool 2, 3, 4.
ÈFor USA and CDN
ÉExcept for USA and CDN
NOTE:
lHold the connecting rod at top dead center
with one hand while turning the nut of the
installing tool with the other. Operate the
installing tool until the crankshaft bottoms
against the bearing.
lBefore installing the crankshaft, clean the
contacting surface of crankcase.
lApply the lithium soap base grease on the oil
seal lip.
CAUTION:
Do not use a hammer to drive in the crank-
shaft.
Crankshaft installing pot 2:
YU-90050/90890-01274
Crankshaft installing bolt 3:
YU-90050/90890-01275
Adapter (M10) 4:
YM-1277/90890-01277
5PA41720
È€É
5PA41730
2. Check:
lShifter operation
lTransmission operation
Unsmooth operation ® Repair.
3. Apply:
lSealant
On the right crankcase 1.
NOTE:
Clean the contacting surface of left and right
crankcase before applying the sealant.
Quick gasket®:
ACC-QUICK-GS-KT
YAMAHA Bond No. 1215:
90890-85505
5PA41740
5PA41750
CRANKCASE AND CRANKSHAFT

4 - 58
ENG
4. Install:
lDowel pin 1
lRight crankcase 2
To left crankcase 3.
NOTE:
lTurn the shift cam 4 to the position shown in
the figure so that it does not contact the
crankcase when installing the crankcase.
lFit the right crankcase onto the left crank-
case. Tap lightly on the case with soft ham-
mer.
lWhen installing the crankcase, the connect-
ing rod should be positioned at TDC (top
dead center).
5PA41760
5PA41770
5. Install:
lClamp 1
lScrew (crankcase) 2
NOTE:
Tighten the crankcase tightening screws in
stage, using a crisscross pattern.
5PA41780
T R..8 Nm (0.8 m · kg, 5.8 ft · lb)
6. Remove:
lSealant
Forced out on the cylinder mating surface.
7. Apply:
lEngine oil
To the crank pin, bearing, oil delivery hole
and connecting rod end washer.
8. Check:
lCrankshaft and transmission operation
Unsmooth operation ® Repair.
CRANKCASE AND CRANKSHAFT

4 - 61
ENG
Shift fork, shift cam and segment
1. Inspect:
lShift fork 1
Wear/damage/scratches ® Replace.
lStraight pin 2
Wear/damage ® Replace.
5PA41840
2. Inspect:
lShift cam 1
lGuide bar 2
Bend/wear/damage ® Replace.
5PA41850
3. Check:
lShift fork movement
On its guide bar.
Unsmooth operation ® Replace shift fork
and/or guide bar.
NOTE:
For a malfunctioning shift fork, replace not only
the shift fork itself but the two gears each adja-
cent to the shift fork.5PA41860
EC4H5000
ASSEMBLY AND INSTALLATION
Transmission
1. Install:
l5th pinion gear (23T) 1
l3rd/4th pinion gear (17T/17T) 2
l6th pinion gear (25T) 3
l2nd pinion gear (17T) 4
To main axle 5.
NOTE:
lApply the molybdenum disulfide oil on the
5th and 6th pinion gears inner circumference
and on the end surface.
lApply the transmission oil on the 3rd/4th and
2nd pinion gears inner circumference.
5PA41870
TRANSMISSION, SHIFT CAM AND SHIFT FORK

4 - 62
ENG
2. Install:
l2nd wheel gear (32T) 1
l6th wheel gear (25T) 2
l3rd wheel gear (26T) 3
l4th wheel gear (22T) 4
l5th wheel gear (26T) 5
l1st wheel gear (27T) 6
To drive axle 7.
NOTE:
lApply the molybdenum disulfide oil on the
1st, 2nd, 3rd and 4th wheel gears inner cir-
cumference and on the end surface.
lApply the transmission oil on the 5th and 6th
wheel gears inner circumference.
5PA41880
3. Install:
lWasher 1
lCirclip 2
NOTE:
lBe sure the circlip sharp-edged corner a is
positioned opposite side to the washer and
gear b.
lBe sure the circlip end c is positioned at
axle spline groove d.
5PA41900
5PA41890
4. Install:
lCollar 1
NOTE:
lApply the lithium soap base grease on the oil
seal lip.
lWhen installing the collar into the crankcase,
pay careful attention to the crankcase oil seal
lip.
5PA41910
TRANSMISSION, SHIFT CAM AND SHIFT FORK

4 - 63
ENG
5. Install:
lMain axle 1
lDrive axle 2
To left crankcase.
5PA41920
Shift cam and shift fork
1. Install:
lShift fork 1 (L) 1
lShift fork 2 2
lShift fork 3 (R) 3
lStraight pin 4
NOTE:
lMesh the shift fork #1 (L) with the 6th wheel
gear 5 and #3 (R) with the 5th wheel gear 7
on the drive axle.
lMesh the shift fork #2 with the 3rd/4th pinion
gear 6 on the main axle.
5PA41930
5PA41940
2. Install:
lShift cam 1
NOTE:
Apply the transmission oil on the shift cam.
5PA41950
TRANSMISSION, SHIFT CAM AND SHIFT FORK

4 - 64
ENG
3. Install:
lGuide bar (long) 1
lGuide bar (short) 2
NOTE:
lApply the transmission oil on the guide bars.
lBe sure the long bar is inserted into the shift
forks #1 and #3 and the short one into #2.
5PA41960
4. Check:
lShifter operation
lTransmission operation
Unsmooth operation ® Repair.
5PA41970
TRANSMISSION, SHIFT CAM AND SHIFT FORK

5 - 3
CHAS
POINTS DE DEPOSE
Roue arrière
1. Déposer:
lRoue 1
N.B.:
Pousser la roue vers l’avant et déposer la chaîne de
transmission 2.
Roulement de roue (si nécessaire)
1. Déposer:
lRoulement 1
N.B.:
Déposer le roulement à l’aide d’un arrache-roule-
ment courant 2.
CONTROLE
Roue
1. Mesurer:
lVoile de roue
Hors spécifications ® Réparer ou remplacer.
2. Contrôler:
lRoulement
Faire tourner la bague intérieure avec le doigt.
Rugosité/grippage ® Remplacer.
N.B.:
Remplacer ensemble les roulements, la bague
d’étanchéité et la collerette de roue.
Limite de voile de roue:
Radial 1: 2,0 mm (0,08 in)
Latéral 2: 2,0 mm (0,08 in)
ROUE AVANT ET ROUE ARRIERE
VORDER- UND HINTERRAD
DEMONTAGE-ARBEITEN
Hinterrad
1. Ausbauen:
lRad 1
HINWEIS:
Das Rad vorwärts drehen und die Antriebs-
kette abnehmen 2.
Radlager (falls erforderlich)
1. Ausbauen:
lLager 1
HINWEIS:
Lager mit einem Lageraustreiber anziehen 2.
PRÜFUNG
Rad
1. Messen:
lFelgenschlag
Unvorschriftsmäßig ® instand setzen oder
erneuern.
2. Kontrollieren:
lLager
Inneren Laufring mit dem Finger drehen.
Schwergängigkeit/Freßspuren ® erneuern
HINWEIS:
Lager, Dichtungen und Distanzhülse komplett
erneuern.
Max. Felgenschlag
Höhenschlag
1: 2,0 mm
Seitenschlag
2: 2,0 mm