2003 YAMAHA WR 250F engine oil

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Page 442 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 117
ENGCLUTCH
EC4A0000
CLUTCH
Extent of removal:
1 Push rod 1, 2 and push lever shaft removal
2 Push pod 1 disassembly
3 Friction plate and clutch plate removal
4 Primary driven gear removal
Exten

Page 454 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 129
ENGCLUTCH
EC4A5000ASSEMBLY AND INSTALLATION
Push lever shaft
1. Install:
Push lever shaft 
1 
Bolt (push lever shaft) 
2 
NOTE:Apply the lithium soap base grease
on the oil seal lip.
Apply

Page 456 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 131
ENGCLUTCH
4. Install:
Seat plate 
1 
Cushion spring 
2 
NOTE:Install the seat plate with its cham-
fered portion 
a facing the clutch
boss 
3.
Install the seat plate so that it is not
caug

Page 460 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 135
ENGOIL FILTER ELEMENT, WATER PUMP AND RIGHT CRANKCASE COVER
OIL FILTER ELEMENT, WATER PUMP AND RIGHT CRANKCASE COVER
Extent of removal:
1 Oil filter element removal
2 Water pump removal
3 Righ

Page 472 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 147
ENGOIL FILTER ELEMENT, WATER PUMP AND RIGHT CRANKCASE COVER
Impeller shaft
1. Install:
Impeller shaft 
1 
Washer 
2 
Impeller 
3 
NOTE:Take care so that the oil seal lip is
not damaged or

Page 482 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 157
ENGBALANCER
ASSEMBLY AND INSTALLATION
Balancer shaft, balancer shaft 
drive gear and balancer shaft 
driven gear
1. Install:
Balancer shaft 
1 
NOTE:Apply the engine oil on the bear-
ing.
W

Page 490 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 165
ENGOIL PUMP
ASSEMBLY AND INSTALLATION
Oil pump
1. Install:
Oil pump drive shaft 
1 
Washer 
2 
Dowel pin 
3 
Inner rotor 1 
4 
NOTE:Apply the engine oil on the oil
pump drive shaft and in

Page 492 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 167
ENGOIL PUMP
5. Install:
Oil pump drive gear 
1 
Washer 
2 
Circlip 
3 
NOTE:Apply the engine oil on the oil pump
drive gear inner circumference.
New
5. Monteur:
Pignon menant de la pompe