Yamaha MX250 - Checking the Ignition Coil (Tci Unit, Secondary) Resistance

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ELECTRICAL
ELECTRICAL COMPONENTS
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a. Remove the ignition coil (TCI unit).
b. Connect the digital circuit tester () to the primary
terminal.
c. Measure the primary coil resistance.
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CHECKING THE IGNITION COIL (TCI UNIT,
SECONDARY) RESISTANCE
1.
Check:
• Secondary coil resistance
Out of specification  Replace.
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a. Remove the ignition coil (TCI unit).
b. Connect the digital circuit tester () to the second-
ary terminal.
c. Measure the secondary coil resistance.
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Model 88 Multimeter with tachometer:
YU-A1927
Digital circuit tester (CD732):
90890-03243
• Positive tester probe 
Black/White “1”
• Negative tester probe 
Body ground “2”
Secondary coil resistance:
11.7 k
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Model 88 Multimeter with tachometer:
YU-A1927
Digital circuit tester (CD732):
90890-03243
• Positive tester probe 
High tension cord “1”
• Negative tester probe 
Black/White “2”