2003 YAMAHA WR 250F AUX

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Page 536 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 211
ENGENGINE REMOVAL
EC4M3000REMOVAL POINTSEC4F3100Drive sprocket
1. Remove:
Nut (drive sprocket) 
1 
Lock washer 
2 
NOTE:Straighten the lock washer tab.
Loosen the nut while applying the
re

Page 558 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 233
ENGCRANKCASE AND CRANKSHAFT
EC4N4201Crankshaft
1. Measure:
Runout limit 
a 
Small end free play limit 
b 
Connecting rod big end side
clearance 
c 
Crank width 
d 
Out of specification

Page 560 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 4 - 235
ENGCRANKCASE AND CRANKSHAFT
EC4N5000ASSEMBLY AND INSTALLATION
Crankcase bearing
1. Install:
Bearing 
Bearing stopper
Bolt (bearing stopper)
Screw (bearing stopper)
Screw [bearing stopper

Page 634 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 57
CHASFRONT BRAKE AND REAR BRAKE
Brake fluid
1. Fill:
Brake fluid
Until the fluid level reaches
“LOWER” level line 
a.
WARNING
Use only the designated quality
brake fluid:
otherwise, the ru

Page 646 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 69
CHASFRONT FORK
EC556000HANDLING NOTE
NOTE:The front fork requires careful atten-
tion. So it is recommended that the
front fork be maintained at the deal-
ers.
CAUTION:
To prevent an accidental

Page 648 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 71
CHASFRONT FORK
EC553201Inner tube
1. Remove:
Dust seal 
1 
Stopper ring 
2 
Using slotted-head screw-
driver.
CAUTION:
Take care not to scratch the inner
tube.
2. Remove:
Inner tube 
1 
Oil

Page 717 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 140
CHAS
AMORTISSEUR ARRIERE
Organisation de la dépose:1 Dépose de l’amortisseur arrière2 Démontage de l’amortisseur arrière
Organisation de la dépose Ordre Nom de pièce QtéRemarques
D

Page 724 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 5 - 147
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