lock YAMAHA WR 400F 2000 Manuale duso (in Italian)

4 - 46
ENGCLUTCH
EC493000
REMOVAL POINTS
EC483211
Clutch boss
1. Remove:
lNut 1
lLock washer 2
lClutch boss 3
NOTE:
Straighten the lock washer tab and use the
clutch holding tool 4 to hold the clutch boss.
For USA and CDN
õExcept for USA and CDN
Clutch holding tool:
YM-91042/90890-04086

õ
EC494000
INSPECTION
EC484100
Clutch housing and boss
1. Inspect:
lClutch housing 1
Cracks/wear/damage ® Replace.
lClutch boss 2
Scoring/wear/damage ® Replace.
EC484201
Primary driven gear
1. Check:
lCircumferential play
Free play exists ® Replace.
lGear teeth a
Wear/damage ® Replace.
EC484400
Clutch spring
1. Measure:
lClutch spring free length a
Out of specification ® Replace springs
as a set.
Clutch spring free length:
Standard
44 mm
(1.73 in)43 mm
(1.69 in)

4 - 48
ENGCLUTCH
EC495221
Clutch
1. Install:
lLock washer 1
lNut (clutch boss) 2
NOTE:
Use the clutch holding tool 3 to hold the clutch
boss.
For USA and CDN
õExcept for USA and CDN
Clutch holding tool:
YM-91042/90890-04086
New
T R..75 Nm (7.5 m · kg, 54 ft · lb)
õ
2. Bend the lock washer 1 tab.
3. Install:
lFriction plate 1 [ø112 mm (4.41 in)] 1
lClutch plate 2
lFriction plate 2 [ø116 mm (4.57 in)] 3
NOTE:
lInstall the clutch plates and friction plates
alternately on the clutch boss, starting with a
friction plate 1 and ending with a friction plate
2.
lApply the engine oil on the friction plates and
clutch plates.
4. Install:
lBearing 1
lPlain washer 2
lCirclip 3
To push rod 1 4.
NOTE:
Apply the engine oil on the bearing and plain
washer.
New

ENG
4 - 56
BALANCER
BALANCER
BALANCER
Extent of removal:1 Balancer drive gear2 Balancer
Extent of removal Order Part name Q’ty Remarks
BALANCER REMOVAL
Preparation for removal Clutch housing Refer to “CLUTCH” section.
Crankcase cover (right) Refer to “OIL FILTER, WATER PUMP
AND CRANKCASE COVER (RIGHT)”
section.
Stator Refer to “CDI MAGNETO” section.
1 Nut (primary drive gear) 1
Refer to “REMOVAL POINTS”. 2 Nut (balancer) 1
3 Lock washer 1
4 Primary drive gear 1
5 Balancer drive gear 1
6 Straight key 1
7 Lock washer 1
8 Balancer driven gear 1
9Balancer
1
2
1
2

4 - 57
ENGBALANCER
REMOVAL POINTS
Balancer drive gear and balancer driven
gear
1. Straighten the lock washer tab.
2. Loosen:
lNut (primary drive gear) 1
lNut (balancer) 2
NOTE:
Place an aluminum plate 3 between the teeth
of the balancer drive gear 4 and driven gear
5.
Balancer
1. Remove:
lBalancer 1
NOTE:
When removing the balancer shaft, align the
center of the balancer shaft weight a along
the line connecting the centers of the crank-
shaft and balancer shaft.
INSPECTION
Primary drive gear, balancer drive gear and
balancer driven gear
1. Inspect:
lPrimary drive gear 1
lBalancer drive gear 2
lBalancer drive gear 3
Wear/damage ® Replace.
Balancer
1. Inspect:
lBalancer
Cracks/damage ® Replace.

ENG
4 - 57
BALANCIER
AUSGLEICHSWELLE
COMPENSADOR
AUSBAU
Ausgleichswellen-Antriebs- und -
Abtriebsräder
1. Die Lasche der Sicherungs-
scheibe umbiegen.
2. Lockern:
lMutter (Primärantriebsrad)
1
lMutter (Ausgleichswelle) 2
HINWEIS:
Ein Stückchen Aluminium 3 zwi-
schen die Zähne des Ausgleichswel-
len-Antriebsrades 4 und Aus-
gleichswellen-Abtriebrades 5 legen.
Ausgleichswelle
1. Demontieren:
lAusgleichswelle 1
HINWEIS:
Beim Ausbau der Ausgleichswelle
muß sich das Ausgleichsgewicht mit-
tig a auf der Fluchtlinie zwischen
den Mittelpunkten der Nockenwellen-
und Ausgleichswellen-Enden befin-
den.
PRÜFUNG
Primär- und Ausgleichswellen-
Antriebs- und -Abtriebsräder
1. Kontrollieren:
lPrimärantriebsrad 1
lAusgleichswellen-Antriebs-
rad 2
lAusgleichswellen-Abtriebs-
rad 3
Verschleiß/Beschädigung ®
Erneuern.
Ausgleichswelle
1. Kontrollieren:
lAusgleichswelle
Rißbildung/Beschädigung
® Erneuern. POINTS DE DEPOSE
Pignon menant et pignon mené du
balancier
1. Redresser l’ongle de rondelle
d’arrêt.
2. Desserrer:
lEcrou (pignon menant pri-
maire) 1
lEcrou (balancier) 2
N.B.:
Placer une plaque en aluminium 3 entre
les dents du pignon menant 4 et le
pignon mené 5 du balancier.
Balancier
1. Déposer:
lBalancier 1
N.B.:
Avant de déposer l’arbre de balancier,
aligner le centre du poids de l’arbre de
balancier a avec l’axe reliant le centre
du vilebrequin et le centre de l’arbre de
balancier.
CONTROLE
Pignon menant primaire, pignon
menant et pignon mené du balancier
1. Contrôler:
lPignon menant primaire 1
lPignon menant du balancier 2
lPignon mené du balancier 3
Usure/endommagements ®
Remplacer.
Balancier
1. Contrôler:
lBalancier
Craquelures/endommagement
® Remplacer.PUNTOS DE EXTRACCIÓN
Engranaje de accionamiento del com-
pensador y engranaje impulsor del
compensador
1. Enderece la lengüeta de la aran-
dela de freno.
2. Aflojar:
lTuerca (engranaje de acciona-
miento primario) 1
lTuerca (compensador) 2
NOTA:
Coloque una plancha de aluminio 3
entre el diente del engranaje de acciona-
miento del compensador 4 y el engra-
naje impulsor 5.
Compensador
1. Extraer:
lCompensador 1
NOTA:
Cuando extraiga el eje del compensador,
alinee el centro del peso del eje del com-
pensador a a través de la línea conec-
tando los centros del cigüeñal y el eje del
compensador.
INSPECCIÓN
Engranaje de accionamiento prima-
rio, engranaje de accionamiento del
compensador y engranaje impulsor
del compensador
1. Inspeccionar:
lEngranaje de accionamiento
primario 1
lEngranaje de accionamiento
del compensador 2
lEngranaje de accionamiento
del compensador 3
Desgaste/Daños ® Reemplazar.
Compensador
1. Inspeccionar:
lCompensador
Grietas/Daños ® Reemplazar.

4 - 58
ENGBALANCER
ASSEMBLY AND INSTALLATION
Balancer, balancer drive gear and balancer
driven gear
1. Install:
lBalancer 1
NOTE:
When installing the balancer shaft, align the
center of the balancer shaft weight a along
the line connecting the centers of the crank-
shaft and balancer shaft.
2. Install:
lBalancer driven gear 1
NOTE:
Install the balancer driven gear onto the bal-
ancer while aligning the punch mark a on the
balancer driven gear with the protrusion b on
the balancer end.
3. Install:
lStraight key 1
lBalancer drive gear 2
lPrimary drive gear 3
NOTE:
Align the punched mark a on the balancer
drive gear with the punched mark b on the
balancer driven gear.
4. Install:
lLock washer 1
lNut (balancer) 2
lNut (primary drive gear) 3
NOTE:
Place an aluminum plate 4 between the teeth
of the balancer drive gear 5 and driven gear
6.
5. Bend the lock washer tab.
T R..50 Nm (5.0 m · kg, 3.6 ft · lb)
T R..75 Nm (7.5 m · kg, 54 ft · lb)

4 - 65
ENGKICK AXLE AND SHIFT SHAFT
REMOVAL POINTS
EC4B3101
Kick axle assembly
1. Remove:
lKick axle assembly 1
NOTE:
Unhook the torsion spring 2 from the hole a
in the crankcase.
EC4C3101
Shift guide and shift lever assembly
1. Remove:
lBolt (shift guide)
lShift guide 1
lShift lever assembly 2
NOTE:
The shift lever assembly is disassembled at
the same time as the shift guide.
EC4N3100
Segment
1. Remove:
lBolt (segment) 1
lSegment 2
NOTE:
Turn the segment counterclockwise until it
stops and loosen the bolt.
EC4C4000
INSPECTION
EC4B4100
Kick axle and ratchet wheel
1. Check:
lRatchet wheel smooth movement
Unsmooth movement ® Replace.
2. Inspect:
lKick axle 1
Wear/damage ® Replace.
Kick gear, kick idle gear and ratchet wheel
1. Inspect:
lKick gear 1
lKick idle gear 2
lRatchet wheel 3
lGear teeth a
Wear/damage ® Replace.

4 - 68
ENGKICK AXLE AND SHIFT SHAFT
EC4B5302
Kick axle assembly
1. Install:
lKick gear 1
lRatchet wheel 2
NOTE:
Align the punched mark a on the ratchet
wheel with the punched mark b on the kick
axle.
2. Install:
lTorsion spring 1
To kick axle 2.
NOTE:
Make sure the stopper a of the torsion spring
fits into the hole b on the kick axle.
3. Install:
lSpring guide 1
NOTE:
Slide the spring guide into the kick axle, make
sure the groove a in the spring guide fits on
the stopper of the torsion spring.
4. Install:
lKick axle assembly 1
lPlain washer 2
NOTE:
lApply the engine oil on the kick axle.
lSlide the kick axle assembly into the crank-
case, make sure the kick axle stopper a fit
into their home position b.
5. Hook:
lTorsion spring 1
NOTE:
Turn the torsion spring clockwise and hook
into the proper hole a in the crankcase.

ENG
4 - 75
ENGINE REMOVAL
Extent of removal:1 Engine removal
Extent of removal Order Part name Q’ty Remarks
1 Engine skidplate 1
2 Neutral switch 1
3 Engine oil hose 2
4 Chain cover 1
Refer to “REMOVAL POINTS”. 5 Nut (drive sprocket) 1
6 Lock washer 1
7 Drive sprocket 1
8 Clip 1
9 Bolt (brake pedal) 1
10 Brake pedal 1
11 Engine upper bracket (right) 1
12 Engine upper bracket (left) 1
13 Engine lower bracket 2
14 Engine mounting bolt 3
15 Pivot shaft 1
Refer to “REMOVAL POINTS”.
16 Engine 1
1

4 - 76
ENGENGINE REMOVAL
EC4M3000
REMOVAL POINTS
EC4F3100
Drive sprocket
1. Remove:
lNut (drive sprocket) 1
lLock washer 2
NOTE:
lStraighten the lock washer tab.
lLoosen the nut while applying the rear brake.
2. Remove:
lDrive sprocket 1
lDrive chain 2
NOTE:
Remove the drive sprocket together with the
drive chain.
EC4M3301
Engine removal
1. Remove:
lPivot shaft 1
NOTE:
If the pivot shaft is pulled all the way out, the
swingarm will come loose. If possible, insert a
shaft of similar diameter into the other side of
the swingarm to support it.
2. Remove:
lEngine 1
From right side.
NOTE:
Make sure that the couplers, hoses and cables
are disconnected.