4-18
CAMSHAFTS
c. Fit the timing chain "3" onto both
camshaft sprockets and install the
camshafts on the cylinder head.
The camshafts should be installed
onto the cylinder head so that the
punch mark "c" on the exhaust cam-
shaft and the punch mark "d" on the
intake camshaft must align with the
cylinder head surface, as shown in
the illustration.
Do not turn the crankshaft during
the camshaft installation. Damage
or improper valve timing will re-
sult.
d. Install the clips, camshaft caps "4"
and bolts (camshaft cap) "5".
• Before removing the clips, cover the
cylinder head with a clean rag to
prevent the clips from into the cylin-
der head cavity.
• Apply the molybdenum disulfide oil
on the thread of the bolts (camshaft
cap).
• Tighten the bolts to the specified
torque in two or three steps in the
proper tightening sequence as
shown.
The bolts (camshaft cap) must be
tightened evenly, or damage to the
cylinder head, camshaft caps, and
camshaft will result.
2. Install:
• Timing chain tensioner
Installation steps:
a. While pressing the tensioner rod
lightly with fingers, use a thin
screwdriver and wind the tension-
er rod up fully clockwise.
b. With the rod fully wound and the
chain tensioner UP mark "a" fac-
ing upward, install the gasket "1"
and the timing chain tensioner "2",
and tighten the bolt "3" to the
specified torque.
c. Release the screwdriver, check
the tensioner rod to come out and
tighten the gasket "4" and the cap
bolt "5" to the specified torque.
3. Turn:
• Crankshaft
Counterclockwise several turns.
4. Check:
• Rotor T.D.C. mark
Align with the crankcase align
mark.
• Camshaft match marks
Align with the cylinder head sur-
face.
Out of alignment
→
Adjust.
5. Install:
• Timing mark accessing screw "1"
• Crankshaft end accessing screw
"2"
6. Install:
• Timing chain guide (top side) "1"
• Cylinder head cover gasket "2"
• Cylinder head cover "3"
• Bolt (cylinder head cover) "4"
Apply the sealant on the cylinder
head cover gasket.
7. Install:
• Cylinder head breather hose
• Spark plug
Bolt (camshaft cap):
10 Nm (1.0 m•kg, 7.2
ft•lb)
Bolt (timing chain ten-
sioner):
10 Nm (1.0 m•kg, 7.2
ft•lb)
Tensioner cap bolt:
7 Nm (0.7 m•kg, 5.1
ft•lb)
Bolt (cylinder head cov-
er):
10 Nm (1.0 m•kg, 7.2
ft•lb)
YAMAHA Bond No. 1215
(ThreeBond
®
No. 1215):
90890-85505
Spark plug:
13 Nm (1.3 m•kg, 9.4
ft•lb)
Содержание YZ250F(X)
Страница 2: ......
Страница 37: ...2 17 LUBRICATION DIAGRAMS 1 Crankshaft 2 Oil filter element 3 Oil tank 4 Oil hose A From oil pump ...
Страница 57: ...3 13 ENGINE INTAKE EXHAUST ...
Страница 108: ...4 41 OIL PUMP 15 Rotor housing 1 Order Part name Q ty Remarks ...
Страница 159: ...5 29 STEERING 9 Bearing race 2 Refer to removal section Order Part name Q ty Remarks ...
Страница 168: ...5 38 REAR SHOCK ABSORBER 12 Bearing 2 Refer to removal section Order Part name Q ty Remarks ...
Страница 243: ...3 13 MOTEUR ADMISSION ECHAPPEMENT ...
Страница 275: ...4 21 CULASSE 7 Carter de chaîne de distribution côté échappe ment 1 Ordre Nom de la pièce Qté Remarques ...
Страница 298: ...4 44 BALANCIER 5 Replier l onglet de la rondelle frein ...
Страница 300: ...4 46 POMPE A HUILE 14 Arbre d entraînement de pompe à huile 1 15 Boîtier du rotor 1 Ordre Nom de la pièce Qté Remarques ...
Страница 361: ...5 38 AMORTISSEUR ARRIERE 12 Roulement 2 Se reporter à la section de dépose Ordre Nom de la pièce Qté Remarques ...
Страница 384: ......
Страница 419: ...2 17 SCHMIERSYSTEM SCHAUBILDER 1 Kurbelwelle 2 Ölfiltereinsatz 3 Öltank 4 Ölschlauch A Von der Ölpumpe ...
Страница 439: ...3 13 MOTOR EINLASS AUSLASS ...
Страница 495: ...4 45 ÖLPUMPE 15 Rotorgehäuse 1 Reihenfolge Bauteil Anz Bemerkungen ...
Страница 555: ...5 38 FEDERBEIN 12 Lager 2 Siehe den Abschnitt zum Ausbau Reihenfolge Bauteil Anz Bemerkungen ...
Страница 578: ......
Страница 634: ...3 14 MOTORE ASPIRAZIONE SCARICO ...
Страница 685: ...4 40 ELEMENTO FILTRO OLIO E POMPA DELL ACQUA Applicare il grasso a base di sapone di litio sulla guarnizione circolare ...
Страница 688: ...4 43 EQUILIBRATORE 5 Piegare la linguetta della rondella di bloccaggio ...
Страница 690: ...4 45 POMPA DELL OLIO 15 Alloggiamento del rotore 1 Ordine Denominazione Quantità Osservazioni ...
Страница 774: ......
Страница 775: ......