KYMCO MX’er 125 Service Manual page 189

15
. IGNITION SYSTEM
SERVICE INFORMATION
GENERAL INSTRUCTIONS
• Check the ignition system according to the sequence specified in the Troubleshooting.
• The ignition system adopts CDI unit , change gear control and the ignition timing cannot be adjusted.
• If the timing is incorrect, inspect the CDI unit, A.C. generator, change gear control 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 17-5.
• Inspect the spark plug referring to Section 3.
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
TESTING INSTRUMENT
Kowa Electric Tester
or commercially available electric tester with resistance over 10MΩ/CDV
TROUBLESHOOTING
Item
Standard type
Hot type
Cold type
"F" mark
Full advance
Primary coil
Secondary with plug cap
coil
plug cap
MX'er SYSTEM
Standard
CR8E
0.6 0.7mm
15ºBTDC/1,700±100rpm
0.2 0.3Ω
3.2 4.8KΩ
4.2 5.2KΩ
50 60Ω
100 120Ω
12V min.
2.1V min.
15-2