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CRANKCASE AND CRANKSHAFT
DISASSEMBLING THE
CRANKCASE
1. Separate:
• Right crankcase
• Left crankcase
Separation steps:
a. Remove the crankcase bolts,
hose guide and clutch cable hold-
er.
Loosen each bolt 1/4 of a turn at a
time and after all the bolts are loos-
ened, remove them.
b. Remove the right crankcase "1".
• Place the crankcase with its left
side downward and split it by insert-
ing a screwdriver tip into the split-
ting slit "a" in the crankcase.
• Lift the right crankcase horizontally
while lightly patting the case split-
ting slit and engine mounting boss
using a soft hammer, and leave the
crankshaft and transmission with
the left crankcase.
Use soft hammer to tap on the
case half. Tap only on reinforced
portions of case. Do not tap on
gasket mating surface. Work slow-
ly and carefully. Make sure the
case halves separate evenly. If the
cases do not separate, check for a
remaining case bolt or fitting. Do
not force.
c. Remove the dowel pins and O-
ring.
REMOVING THE BALANCER
SHAFT
1. Remove:
• Balancer shaft "1"
Remove the balancer shaft with its
flat side "a" facing the crankshaft.
REMOVING THE CRANKSHAFT
1. Remove:
• Crankshaft "1"
Use the crankcase separating
tool "2".
Install the crankcase separating tool
as shown.
Do not use a hammer to drive out
the crankshaft.
REMOVING THE CRANKCASE
BEARING
1. Remove:
• Bearing "1"
• Remove the bearing from the
crankcase by pressing its inner
race.
• Do not use the removed bearing.
CHECKING THE TIMING CHAIN
AND TIMING CHAIN GUIDE
1. Inspect:
• Timing chain
Cracks/stiff
→
Replace the timing
chain and camshaft sprocket as a
set.
2. Inspect:
• Timing chain guide
Wear/damage
→
Replace.
CHECKING THE CRANKCASE
1. Inspect:
• Contacting surface "a"
Scratches
→
Replace.
• Engine mounting boss "b", crank-
case
Cracks/damage
→
Replace.
2. Inspect:
• Bearing
Rotate inner race with a finger.
Rough spot/seizure
→
Replace.
3. Inspect:
• Oil seal
Damage
→
Replace.
CHECKING THE CRANKSHAFT
1. Measure:
• Runout limit "a"
• Small end free play limit "b"
• Connecting rod big end side
clearance "c"
Crankcase separating
tool:
YU-A9642/90890-04152
Содержание YZ450F(X)
Страница 2: ......
Страница 37: ...2 17 LUBRICATION DIAGRAMS 1 Intake camshaft 2 Exhaust camshaft A To main axle B From oil pump ...
Страница 56: ...3 12 ENGINE INTAKE EXHAUST ...
Страница 87: ...4 21 CYLINDER HEAD ...
Страница 106: ...4 40 OIL PUMP 15 Oil pump drive shaft 1 16 Rotor housing 1 Order Part name Q ty Remarks ...
Страница 156: ...5 29 STEERING 9 Bearing race 2 Refer to removal section Order Part name Q ty Remarks ...
Страница 165: ...5 38 REAR SHOCK ABSORBER 12 Bearing 2 Refer to removal section Order Part name Q ty Remarks ...
Страница 186: ......
Страница 196: ...1 4 VERIFICATION DES CONNEXIONS ...
Страница 223: ...2 18 DIAGRAMMES DE LUBRIFICATION ...
Страница 243: ...3 13 MOTEUR ADMISSION ECHAPPEMENT ...
Страница 260: ...4 6 RADIATEUR 11 Tuyau 1 Joint torique 1 1 Ordre Nom de la pièce Qté Remarques ...
Страница 276: ...4 22 CULASSE 3 Monter Boulon culasse 1 Boulon culasse 10 Nm 1 0 m kg 7 2 ft lb ...
Страница 290: ...4 36 EMBRAYAGE ...
Страница 357: ...5 38 AMORTISSEUR ARRIERE 12 Roulement 2 Se reporter à la section de dépose Ordre Nom de la pièce Qté Remarques ...
Страница 380: ......
Страница 435: ...3 13 MOTOR EINLASS AUSLASS ...
Страница 451: ...4 5 AUSPUFFKRÜMMER UND SCHALLDÄMPFER ...
Страница 469: ...4 23 ZYLINDERKOPF 3 Montieren Zylinderkopf Schrauben 1 Zylinderkopf Schrauben 10 Nm 1 0 m kg 7 2 ft lb ...
Страница 474: ...4 28 VENTILE UND VENTILFEDERN ...
Страница 490: ...4 44 ÖLPUMPE 15 Ölpumpen Antriebswelle 1 16 Rotorgehäuse 1 Reihenfolge Bauteil Anz Bemerkungen ...
Страница 549: ...5 38 FEDERBEIN 12 Lager 2 Siehe den Abschnitt zum Ausbau Reihenfolge Bauteil Anz Bemerkungen ...
Страница 572: ......
Страница 573: ......