17. IGNITION SYSTEM
17-2
Mongoose/KXR 250
SERVICE INFORMATION
GENERAL INSTRUCTIONS
• Check the ignition system according to the sequence specified in the Troubleshooting.
• The ignition system adopts ignition unit, change gear control and the ignition timing cannot be
adjusted.
• If the timing is incorrect, inspect the ignition unit, A.C. generator, change gear control and
replace any faulty parts. Inspect the ignition unit with a ignition unit 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 spark plug referring to chapter 3.
SPECIFICATIONS
Item Standard
Spark plug Standard type DPR7EA-9
Spark plug gap 0.6～0.7mm
Ignition timing
“F” mark
Full advance
5º±1ºBTDC/2000RPM
Primary coil 3.4～4.1Ω
Ignition coil resistance (20℃) Secondary without plug cap 14.45KΩ
coil
with plug cap 19.8KΩ
Pulser coil resistance (20℃) 105～110Ω
Ignition coil primary side max. voltage 14V
Pulser coil max. voltage 1.6V
Exciter coil max. voltage 14V
TESTING INSTRUMENT
Commercially available electric tester with resistance over 10MΩ/CDV.
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