Checking The Ignition Coil; Checking The Spark Plug Gap - Yamaha 2007 XP500 Service Manual

EAS28080

CHECKING THE IGNITION COIL

1. Check:
Primary coil resistance
G
Out of specification → Replace.
Primary coil resistance
1.87–2.53 Ω
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a. Disconnect the ignition coil connectors from
the ignition coil terminals.
b. Connect the pocket tester (Ω × 1) to the igni-
tion coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Positive tester probe
Red/Black
Negative tester probe
Orange (gray)
c. Measure the primary coil resistance.
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2. Check:
Secondary coil resistance
G
Out of specification → Replace.
Secondary coil resistance
12.00–18.00 kΩ
MMMMMMMMMMMMMMMMMMMMMM
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.
ELECTRICAL COMPONENTS
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Negative tester probe
Spark plug lead
Positive tester probe
Spark plug lead
c. Measure the secondary coil resistance.
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EAS28080b

CHECKING THE SPARK PLUG GAP

1. Check:
Ignition spark gap
G
Out of specification → Replace.
Minimum ignition spark gap
6 mm (0.24 in)
MMMMMMMMMMMMMMMMMMMMMM
a. Disconnect the spark plug cap "1" from the
spark plug.
b. Connect the ignition checker/dynamic spark
tester "2" as shown.
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
c. Set the main switch to "ON".
d. Measure the ignition spark gap "a".
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