2005 YAMAHA WR 250F Chain

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Page 537 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 212
ENG
Organisation de la dépose:1 Dépose du moteur
Organisation de la dépose Ordre Nom de la pièce QtéRemarques
Bobine d’allumage
Déconnecter le fil de l’alternateur avec rotor à 
ali

Page 540 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 215
ENGENGINE REMOVAL
EC4M3000REMOVAL POINTSEC4F3100Drive sprocket
1. Remove:
Nut (drive sprocket) 
1 
Lock washer 
2 
NOTE:Straighten the lock washer tab.
Loosen the nut while applying the
re

Page 542 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 217
ENGENGINE REMOVAL
EC4M5000ASSEMBLY AND INSTALLATION
Engine installation
1. Install:
Engine 
1 
Install the engine from right
side.
Pivot shaft 
2 
Engine mounting bolt 
(lower) 
3 
Lower e

Page 544 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 219
ENGENGINE REMOVAL
2. Install:
Lock washer 
1 
Nut (drive sprocket) 
2 
NOTE:Tighten the nut while applying the
rear brake.
T R..75 Nm (7.5 m · kg, 54 ft · lb)
New
3. Bend the lock washer t

Page 546 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 221
ENGCRANKCASE AND CRANKSHAFT
CRANKCASE AND CRANKSHAFT
Extent of removal:
1 Crankcase separation
2 Crankshaft removal
Extent of removal Order Part name Q’ty Remarks
CRANKCASE AND CRANKSHAFT 
R

Page 547 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 222
ENG
CARTER MOTEUR ET VILEBREQUIN
Organisation de la dépose:1 Séparation du carter moteur2 Dépose du vilebrequin
Organisation de la dépose Ordre Nom de la pièce QtéRemarques
DEPOSE DU CAR

Page 560 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 235
ENGCRANKCASE AND CRANKSHAFT
Crankshaft
1. Remove:
Crankshaft 
1 
Use the crankcase separating
tool 
2.
CAUTION:
Do not use a hammer to drive out
the crankshaft.
Crankcase separating 
tool:
YU

Page 568 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 243
ENGCRANKCASE AND CRANKSHAFT
6. Tighten:
Hose guide 
1 
Clutch cable holder 
2 
Bolt (crankcase) 
3 
NOTE:Tighten the crankcase tightening
bolts in stage, using a crisscross pat-
tern.
T R..