2005 YAMAHA WR 250F transmission

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Page 485 of 864

YAMAHA WR 250F 2005  Manuale duso (in Italian) 4 - 160
ENG
POMPE A HUILE
Organisation de la dépose:1 Dépose de la pompe à huile2 Démontage de la pompe à huile.
Organisation de la dépose Ordre Nom de la pièce QtéRemarques
DEPOSE ET DEMONTAG

Page 537 of 864

YAMAHA WR 250F 2005  Manuale duso (in Italian) 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  Manuale duso (in Italian) 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  Manuale duso (in Italian) 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  Manuale duso (in Italian) 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 554 of 864

YAMAHA WR 250F 2005  Manuale duso (in Italian) 4 - 229
ENGCRANKCASE AND CRANKSHAFT
CRANKCASE BEARING
Extent of removal:
1 Crankcase bearing removal
Extent of removal Order Part name Q’ty Remarks
CRANKCASE BEARING REMOVAL
Preparation for removal

Page 558 of 864

YAMAHA WR 250F 2005  Manuale duso (in Italian) 4 - 233
ENGCRANKCASE AND CRANKSHAFT
REMOVAL POINTS
Crankcase
1. Separate:
Right crankcase
Left crankcase
Separation steps:
Remove the crankcase bolts 
1,
hose guide 
2 and clutch cable
holder 
3.
N

Page 566 of 864

YAMAHA WR 250F 2005  Manuale duso (in Italian) 4 - 241
ENGCRANKCASE AND CRANKSHAFT
2. Check:
Shifter operation
Transmission operation
Unsmooth operation 
→ 
Repair.
3. Install:
Oil strainer 
1 
Bolt (oil strainer) 
2 
T R..10 Nm (1.0 m · kg
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