2003 YAMAHA WR 250F engine oil

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Page 232 of 860

YAMAHA WR 250F 2003  Owners Manual 3 - 41
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(Except for USA and CDN)
CAUTION:
Do not add any chemical addi-
tives or use oils with a grade of
CD a or higher.
Do not use oils labeled
“ENERGY CONSERVING II” b
or higher. Engi

Page 234 of 860

YAMAHA WR 250F 2003  Owners Manual 3 - 43
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4. Remove:
Oil tank cap 
1 
Oil filler cap 
2 
Frame oil drain bolt 
3 
Crankcase oil drain bolt 
4 
Oil filter element drain bolt 
5 
Drain the crankcase and oil
tank (frame) of

Page 236 of 860

YAMAHA WR 250F 2003  Owners Manual 3 - 45
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8. Install:
Copper washer 
1 
Oil strainer (frame) 
2 
Oil hose 
3 
Bolt (oil hose) 
4 
Oil hose clamp 
5 
Lower engine bracket
9. Install:
Copper washer
Oil filter element dra

Page 238 of 860

YAMAHA WR 250F 2003  Owners Manual 3 - 47
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OIL PRESSURE INSPECTION
1. Check:
Oil pressure
Checking steps:
Slightly loosen the oil pressure
check bolt 
1.
Start the engine and keep it
idling until oil starts to seep from
the

Page 246 of 860

YAMAHA WR 250F 2003  Owners Manual 3 - 55
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EXAMPLE:
Installed pad number = 148
Rounded off value = 150
NOTE:Pads can only be selected in
0.05 mm increments.
Locate the rounded-off value
and the measured valve clear-
ance in th

Page 272 of 860

YAMAHA WR 250F 2003  Owners Manual 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  Owners Manual 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  Owners Manual 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.
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