engine YAMAHA WR 250F 2007 Workshop Manual

YAMAHA WR 250F 2007 Workshop Manual WR 250F 2007 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52333/w960_52333-0.png YAMAHA WR 250F 2007 Workshop Manual

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YAMAHA WR 250F 2007 Workshop Manual 3 - 61
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VALVE CLEARANCE INSPECTION 
AND ADJUSTMENT
NOTE:This section is intended for those
who have basic knowledge and skill
concerning the servicing of Yamaha
motorcycles (e.g., Yamaha deale

Page 274 of 912

YAMAHA WR 250F 2007 Workshop Manual 3 - 63
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5. Check:
Valve clearance
Out of specification 
→ Adjust. 
Valve clearance (cold):
Intake valve:
0.10 ~ 0.15 mm 
(0.0039 ~ 0.0059 in)
Exhaust valve:
0.17 ~ 0.22 mm 
(0.0067 ~ 0.0087

Page 276 of 912

YAMAHA WR 250F 2007 Workshop Manual 3 - 65
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6. Adjust:
Valve clearance
Adjustment steps:
Remove the camshaft (intake
and exhaust).
Refer to “CAMSHAFTS” section
in the CHAPTER 5.
Remove the valve lifters 
1 and
the pads 
2

Page 278 of 912

YAMAHA WR 250F 2007 Workshop 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 280 of 912

YAMAHA WR 250F 2007 Workshop Manual 3 - 69
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ENGINE
INTAKE
EXHAUST
MEASURED 
CLEARANCEINSTALLED PAD NUMBER
120 125 130 135 140 145 150 155 160 165 170
175 180 185 190 195 200 205 210 215 220 225 230 235 240
0.00 ~ 0.04 120 125 13

Page 286 of 912

YAMAHA WR 250F 2007 Workshop Manual 3 - 75
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SPARK ARRESTER CLEANING 
(For USA)
WARNING
Be sure the exhaust pipe and
silencer are cool before cleaning
the spark arrester.
Do not start the engine when
cleaning the exhaust system

Page 304 of 912

YAMAHA WR 250F 2007 Workshop 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 306 of 912

YAMAHA WR 250F 2007 Workshop Manual 3 - 95
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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 308 of 912

YAMAHA WR 250F 2007 Workshop 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 Workshop 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