2003 YAMAHA WR 250F check oil

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Page 576 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 251
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
5. Install:
Shift fork 1 (L) 
1 
Shift fork 2 (C) 
2 
Shift fork 3 (R) 
3 
Shift cam 
4 
To main axle and drive axle.
NOTE:Apply the molybdenum d

Page 656 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 79
CHASFRONT FORK
9. Install:
Slide metal 
1 
Oil seal washer 
2 
To outer tube slot.
NOTE:Press the slide metal into the outer
tube with fork seal driver 
3.
Fork seal driver:
YM-01442/90890-01

Page 660 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 83
CHASFRONT FORK
20. Measure:
Oil level (left and right) 
a 
Out of specification 
→ Adjust.
* For EUROPE
** For AUS, NZ and ZA
NOTE:Be sure to install the spring guide 
2
when checking the oi

Page 710 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 133
CHASSWINGARM
3. Install:
Collar 
1 
To connecting rod 
2.
NOTE:Apply the molybdenum disulfide
grease on the collar and oil seal lips.
4. Install:
Connecting rod 
1 
Bolt (connecting rod) 
2

Page 741 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 6 - 8
–+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 746 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 6 - 13
–+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.


Page 752 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 6 - 19
–+ELECIGNITION SYSTEM
AC MAGNETO INSPECTION
1. Inspect:
Pickup coil resistance
Out of specification 
→ 
Replace.
Tester (+) lead →
 Red lead 1
 
Tester (–) lead →
 White lead 2
 
Pic

Page 778 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 6 - 45
–+ELECCHARGING SYSTEM
EC680000
CHARGING SYSTEM
EC681001INSPECTION STEPS
If the battery is not charged, use the following inspection steps.
*1 marked: Refer to “FUSE INSPECTION” section in
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