length YAMAHA WR 250F 2004 User Guide

YAMAHA WR 250F 2004 User Guide WR 250F 2004 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52336/w960_52336-0.png YAMAHA WR 250F 2004 User Guide

Page 282 of 864

YAMAHA WR 250F 2004 User Guide 3 - 91
INSP
ADJ
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 386 of 864

YAMAHA WR 250F 2004 User Guide 4 - 61
ENGCAMSHAFTS
5. Remove:
Exhaust camshaft 
1 
Intake camshaft 
2 
NOTE:Attach a wire 
3 to the timing chain to
prevent it from falling into the crank-
case.
1
2
3
INSPECTION
Camshaft
1. Inspec

Page 420 of 864

YAMAHA WR 250F 2004 User Guide 4 - 95
ENGVALVES AND VALVE SPRINGS
Valve spring
1. Measure:
Valve spring free length 
a 
Out of specification 
→ 
Replace.
Free length 
(valve spring):
Intake:
37.81 mm (1.49 in)
<Limit>: 
36.81 mm

Page 450 of 864

YAMAHA WR 250F 2004 User Guide 4 - 125
ENGCLUTCH
EC4A3000REMOVAL POINTS
Clutch boss
1. Remove:
Nut 
1 
Lock washer 
2 
Clutch boss 
3 
NOTE:Straighten the lock washer tab and
use the clutch holding tool 
4 to hold
the clutch bos

Page 654 of 864

YAMAHA WR 250F 2004 User Guide 5 - 73
CHASFRONT FORK
EC554200Base valve
1. Inspect:
Valve assembly 
1 
Wear/damage 
→ Replace.
O-ring 
2 
Damage 
→ Replace.
EC554400Fork spring
1. Measure:
Fork spring free length 
a 
Out of

Page 734 of 864

YAMAHA WR 250F 2004 User Guide 5 - 153
CHASREAR SHOCK ABSORBER
3. Adjust:
Spring length (installed) 
a 
* For EUROPE
NOTE:The length of the spring (installed)
changes 1.5 mm (0.06 in) per turn of
the adjuster.
CAUTION:
Never attem

Page 778 of 864

YAMAHA WR 250F 2004 User Guide 6 - 41
–+ELECELECTRIC STARTING SYSTEM
5. Measure: 
Brush length 
a 
Out of specification 
→ 
Replace the brushes as a set.
Min. brush length:
3.5 mm (0.14 in)
6. Measure:
Brush spring force
Out

Page 846 of 864

YAMAHA WR 250F 2004 User Guide 7 - 35
TUNSETTING
EC72B000Rear suspension setting
The rear suspension setting should
be made depending on the rider’s
feeling of an actual run and the cir-
cuit conditions.
The rear suspension setti

Page 848 of 864

YAMAHA WR 250F 2004 User Guide 7 - 37
TUNSETTING
Setting of spring after 
replacement
After replacement, be sure to adjust
the spring to the set length [sunken
length 90 ~ 100 mm (3.5 ~ 3.9 in)]
and set it.
1. Use of soft spring
S

Page 850 of 864

YAMAHA WR 250F 2004 User Guide 7 - 39
TUNSETTING
EC72Q000Rear shock absorber setting parts
Rear shock spring 
1 
[Equal pitch spring]
* For EUROPE
[Unequal pitch spring]
NOTE:The unequal pitch spring is softer
in initial characte
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