2007 YAMAHA WR 250F oil

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Page 550 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 143
ENGOIL FILTER ELEMENT, WATER PUMP AND RIGHT CRANKCASE COVER
Kickstarter crank
1. Install:
Kickstarter crank 
1 
Washer
Bolt (kickstarter crank)
NOTE:Install so that there is a clearance 
a

Page 552 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 145
ENGBALANCER
BALANCER
Extent of removal:
1 Balancer shaft drive gear
2 Balancer shaft
Extent of removal Order Part name Q’ty Remarks
BALANCER REMOVAL
Preparation for removal Primary driven ge

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 560 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 153
ENGOIL PUMP
OIL PUMP
Extent of removal:
1 Oil pump removal
2 Oil pump disassembly
Extent of removal Order Part name Q’ty Remarks
OIL PUMP REMOVAL AND 
DISASSEMBLY
Preparation for removal Pri

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 568 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 161
ENGOIL TANK
INSPECTION
Oil pump
1. Inspect:
Oil pump drive gear 
1 
Oil pump drive shaft 
2 
Rotor housing 
3 
Oil pump cover 
4 
Cracks/wear/damage 
→ 
Replace.1
32
4
2. Measure:
Tip c

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

Page 572 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 165
ENGOIL TANK
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. Monter:
Pignon menant de pompe à hu