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17
. IGNITION SYSTEM
SERVICE INFORMATION
GENERAL INSTRUCTIONS
• Check the ignition system according to the sequence specified in the Troubleshooting. ( 1-28)
• The ignition system adopts CDI unit and the ignition timing cannot be adjusted.
• If the timing is incorrect, inspect the CDI unit and A.C. generator and replace any faulty parts.
Inspect the CDI unit with a CDI tester
• Loose connector and poor wire connection are the main causes of faulty ignition system.
Check each connector before operation.
• Use of spark plug with improper heat range is the main cause of poor engine performance.
• The inspections in this section are focused on maximum voltage. The inspection of ignition coil
resistance is also described in this section.
• Inspect the ignition switch according to the continuity table specified in page 19-3.
• Inspect the spark plug referring to Section 3.
• Remove the A.C. generator and pulser coil referring to Section 10.
SPECIFICATIONS
Spark plug
Spark plug gap
Ignition timing
Ignition coil resistance (20 )
Pulser coil resistance (20 )
Exciter coil resistance (20 )
Ignition coil primary side max. voltage
Pulser coil max. voltage
Exciter coil max. voltage
TESTING INSTRUMENT
Electric tester
TROUBLESHOOTING
No spark at plug
• Faulty spark plug
• Poorly connected, broken or shorted wire
• Faulty ignition switch
• Faulty ignition coil
• Faulty CDI unit
• Faulty A.C. generator
Item
Standard type
"F" mark
Full advance
Primary coil
Secondary without plug cap
coil
with plug cap
Standard
NGK DPR7EA9
0.8 1.0mm
repeatedly
1.5 3.5Ω
12 16KΩ
17 21KΩ
50 170Ω
50 350Ω
14V
1.6V
14V
Engine starts but turns poorly
• Ignition primary circuit
—Faulty ignition coil
—Poorly connected wire or connector
—Poorly contacted ignition switch
• Ignition secondary circuit
—Faulty ignition coil
—Faulty spark plug
—Faulty high-tension wire
—Poorly insulated plug cap
• Improper ignition timing
—Faulty A.C. generator
—Stator not installed properly
—Faulty CDI unit
GRAND DINK 250
17-2

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Troubleshooting

   Also See for KYMCO GRAND DINK 250

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