2007 YAMAHA WR 250F Spark plug

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Page 58 of 912

YAMAHA WR 250F 2007  Owners Manual 1 - 33
GEN
INFO
SIDESTAND
This sidestand 
1 is used to support
only the machine when standing or
transporting it.
WARNING
Never apply additional force to
the sidestand.
Hold up the sidestand before

Page 76 of 912

YAMAHA WR 250F 2007  Owners Manual 1 - 51
GEN
INFO
STARTING AND 
BREAK-IN
WARNING
Never start or run the engine in a
closed area. The exhaust fumes
are poisonous; they can cause
loss of consciousness and death
in a very short time. Alw

Page 92 of 912

YAMAHA WR 250F 2007  Owners Manual 1 - 67
GEN
INFO
EC1B2001STORAGE
If your machine is to be stored for 60
days or more, some preventive mea-
sures must be taken to avoid deterio-
ration. After cleaning the machine
thoroughly, prepare i

Page 95 of 912

YAMAHA WR 250F 2007  Owners Manual GENERAL SPECIFICATIONS
2 - 2
SPEC
Oil capacity:
Engine oil
Periodic oil change 1.1 L (0.97 Imp qt, 1.16 US qt)
With oil filter replacement 1.2 L (1.06 Imp qt, 1.27 US qt)
Total amount 1.4 L (1.23 Imp

Page 103 of 912

YAMAHA WR 250F 2007  Owners Manual MAINTENANCE SPECIFICATIONS
2 - 10
SPEC
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Spark plug M10S × 1.0 1 13 1.3 9.4
Camshaft cap M6 × 1.0 10 10 1.0 7.2
Cylinder head b

Page 213 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 2
INSP
ADJ
MAINTENANCE INTERVALS
ROTOR NUT
Retighten
MUFFLER
Inspect and retighten
Clean
Replace
CRANK
Inspect and clean
CARBURETOR
Inspect, adjust and clean
AIR INDUCTION SYSTEM
Inspect and clean

Page 272 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 61
INSP
ADJ
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 332 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 121
INSP
ADJ
EC370000
ELECTRICAL
EC371001SPARK PLUG INSPECTION
1. Remove:
Spark plug
2. Inspect:
Electrode 
1 
Wear/damage 
→ Replace.
Insulator color 
2 
Normal condition is a medium
to ligh
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