2007 YAMAHA WR 250F engine

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Page 518 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 111
ENGCLUTCH
EC4A0000
CLUTCH
Extent of removal:
1 Push rod 1, 2 and push lever shaft removal
2 Push rod 1 disassembly
3 Friction plate and clutch plate removal
4 Primary driven gear removal
Exten

Page 530 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 123
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 532 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 125
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 536 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 129
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 548 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 141
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 558 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 151
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 564 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 157
ENGOIL TANK
OIL TANK
Extent of removal:
1 Oil tank removal
Extent of removal Order Part name Q’ty Remarks
OIL TANK REMOVAL
Preparation for removal Drain the engine oil. Refer to “ENGINE OI

Page 570 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 163
ENGOIL TANK
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