2007 YAMAHA WR 250F oil

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Page 796 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 133
CHASSWINGARM
2. Install:
•Bearing 
1 
•Washer 
2 
•Oil seal 
3 
To relay arm.
NOTE:•Apply the molybdenum disulfide
grease on the bearing when install-
ing.
•Install the bearing by pr

Page 798 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 135
CHASSWINGARM
2. Install:
•Collar 
1 
•Washer 
2 
To relay arm 
3.
NOTE:Apply the molybdenum disulfide
grease on the collars and oil seal
lips.
3. Install:
•Collar 
1 
To connecting rod

Page 812 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 149
CHASREAR SHOCK ABSORBER
HANDLING NOTE
WARNING
This rear shock absorber is pro-
vided with a separate type tank
filled with high-pressure nitrogen
gas. To prevent the danger of
explosion, read

Page 814 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 151
CHASREAR SHOCK ABSORBER
EC583000REMOVAL POINTSEC583320Bearing
1. Remove:
•Stopper ring 
(upper bearing) 
1 
NOTE:Press in the bearing while pressing
its outer race and remove the stop-
per r

Page 822 of 912

YAMAHA WR 250F 2007  Owners Manual 7 - 1
–+ELECELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC600000
ELECTRICAL
NOTE:This section is intended for those who have basic knowledge and skill concerning the servicing of Yamaha motorcycles
(e.

Page 824 of 912

YAMAHA WR 250F 2007  Owners Manual 7 - 3
–+ELECELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC612000WIRING DIAGRAM
1Headlight
2Multi-function display
3Engine stop switch
4Clutch switch
5Diode
6Starter relay diode
7Throttle position senso

Page 826 of 912

YAMAHA WR 250F 2007  Owners Manual 7 - 5
–+ELECIGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to ignition system failure

Page 832 of 912

YAMAHA WR 250F 2007  Owners Manual 7 - 11
–+ELECIGNITION SYSTEM
SPARK GAP TEST
1. Disconnect the ignition coil from
spark plug.
2. Remove the ignition coil cap.
3. Connect the dynamic spark
tester 
1 (ignition checker 
2) as
shown.