2003 YAMAHA WR 250F oil

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Page 270 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 79
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DRIVE CHAIN INSPECTION
1. Remove:
Drive chain 
1 
NOTE:Remove the drive chain using a drive
chain cutter 
2.
2. Clean:
Drive chain
Brush off as much dirt as pos-
sible. Then clean th

Page 272 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 81
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6. Install:
Chain joint 
1 
O-ring 
2 
Drive chain 
3 
NOTE:When installing the drive chain, apply
the lithium soap base grease on the
chain joint and O-rings.
7. Install:
Link pla

Page 274 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 83
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3. Adjust:
Drive chain slack
Drive chain slack adjustment 
steps:
Loosen the axle nut 
1 and
locknuts 
2.
Adjust the drive chain slack by
turning the adjusters 
3.
To tighten → Tu

Page 276 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 85
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EC36D001FRONT FORK OIL SEAL AND 
DUST SEAL CLEANING
1. Remove:
Protector
Dust seal 
1 
NOTE:Use a thin screw driver, and be care-
ful not to damage the inner fork tube
and dust seal.

Page 282 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 91
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EC36K000REAR SHOCK ABSORBER 
INSPECTION
1. Inspect:
Swingarm smooth action
Abnormal noise/unsmooth
action 
→ Grease the pivoting
points or repair the pivoting
points.
Damage/oil lea

Page 290 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 99
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EC36Q000TIRE PRESSURE CHECK
1. Measure:
Tire pressure
Out of specification 
→ Adjust.
NOTE:Check the tire while it is cold.
Loose bead stoppers allow the tire
to slip off its posi

Page 296 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 105
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GRAISSAGE
Pour assurer le bon fonctionnement de
tous les organes, graisser la machine lors
du montage, après le rodage et après cha-
que course.
1
Tous les câbles de commande
2
Piv

Page 300 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 109
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2. Attach:
Timing light 
Inductive tachometer 
To the ignition coil lead
(orange lead 
1).
Timing light:
YM-33277-A/
90890-03141
Inductive tachometer:
YU-8036-B
Engine tachometer:
9