2007 YAMAHA WR 250F engine oil

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Page 266 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 55
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4. Remove:
Engine guard 
1 
Bolt (oil tank) 
2 
Washer 
3 
Oil filler cap 
4 
Oil tank drain bolt 
5 
Crankcase oil drain bolt 
6 
Oil filter element drain bolt 
7 
Drain the cr

Page 268 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 57
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8. Install:
O-ring 
1 
Oil strainer 
2 
Oil hose
Bolt (oil hose)
Oil hose clamp
9. Install:
Copper washer
Oil filter element drain bolt
Crankcase oil drain bolt
Oil tank drain

Page 270 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 59
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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 278 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 67
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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 304 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 93
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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 308 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 97
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EC36C000FRONT FORK INSPECTION
1. Inspect:
Front fork smooth action
Operate the front brake and
stroke the front fork.
Unsmooth action/oil leakage
→ Repair or replace.
EC36D001FRONT

Page 314 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 103
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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 le

Page 334 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 123
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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
1
3. Adjust:
Engine idling speed
Refer to “ENGINE
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