Kymco MO KXR 250 Service Manual - chap 17 (imp accensione)
17. IGNITION SYSTEM
17-0
Mongoose/KXR 250
17
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IGNITION SYSTEM
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SERVICE INFORMATION -------------------------------------------- 17- 2
TROUBLESHOOTING ------------------------------------------------- 17- 3
IGNITION UNIT /CHANGE GEAR CONTROL INSPECTION --- 17- 4
IGNITION COIL INSPECTION --------------------------------------- 17- 6
PULSER COIL----------------------------------------------------------- 17- 7
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17. IGNITION SYSTEM
17-1
Mongoose/KXR 250
IGNITION CIRCUIT
Ignition Switch
Ignition Unit/Change Gear Control
A.C. Generator/ Pulser Coil
Spark Plug
Ignition Coil
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_ 4.1W
Ignition coil resistance (20¢J)
Secondary
without plug cap
14.45KW
coil
with plug cap
19.8KW
Pulser coil resistance (20¢J)
105_ 110W
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 10MW/CDV.
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