3-39
ELECTRICAL/SPARK PLUG INSPECTION
INSP
ADJ
EC370000
ELECTRICAL
EC371001
SPARK PLUG INSPECTION
1. Remove:
9
Spark plug
2. Inspect:
9
Electrode
1
Wear/Damage
→
Replace.
9
Insulator color
2
Normal condition is a medium to light tan
color.
Distinctly different color
→
Check the
engine condition.
NOTE:
When the engine runs for many hours at low
speeds, the spark plug insulator will become
sooty, even if the engine and carburetor are in
good operating condition.
3. Measure:
9
Plug gap
a
Use a wire gauge or thickness gauge.
Out of specification
→
Regap.
4. Clean the plug with a spark plug cleaner if
necessary.
5. Tighten:
9
Spark plug
NOTE:
9
Before installing a spark plug, clean the
gasket surface and plug surface.
9
Finger-tighten
a
the spark plug before torquing
to specification
b
.
Spark plug gap:
0.5~0.6 mm (0.020~0.024 in)
Standard spark plug:
BR8EG/NGK (resistance type)
20 Nm (2.0 m•kg, 14 ft•lb)
1P8-9-32-3b 5/1/06 9:41 AM Page 46
Summary of Contents for YZ250(W)/W1
Page 78: ...2 11 MAINTENANCE SPECIFICATIONS SPEC MEMO...
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