Yamaha XT250X 2008, Service Manual, Page: 268 / 282

ELECTRICAL COMPONENTS
7-43
EAS28090
CHECKING THE IGNITION COIL
1. Check:
●
Primary coil resistance
Out of specification
→
Replace.
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a. Disconnect the ignition coil connectors from
the wire harness.
b. Connect the pocket tester (
Ω ×
1) to the igni-
tion coil as shown.
c. Measure the primary coil resistance.
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2. Check:
●
Secondary coil resistance
Out of specification
→
Replace.
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a. Disconnect the spark plug cap from the igni-
tion coil.
b. Connect the pocket tester (
Ω ×
1k) to the ig-
nition coil as shown.
c. Measure the secondary coil resistance.
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3. Check:
●
Ignition spark gap
Out of specification
→
Follow Step 5 and later
of the ignition system troubleshooting proce-
dure.
Refer to “TROUBLESHOOTING” on page
7-3.
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a. Disconnect the spark plug cap from the spark
plug.
b. Connect ignition check “1” to the spark plug
as shown.
Primary coil resistance
0.18
–
0.27
Ω
Pocket tester
90890-03132
Positive tester probe
Orange “1”
Negative tester probe
Ignition coil base “2”
Secondary coil resistance
6.32
–
9.48 k
Ω
Pocket tester
90890-03132
Positive tester probe
High tension code “1”
Negative tester probe
Orange “2”
Minimum ignition spark gap
6.0 mm
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
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