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2. Ignition System
Preparing documents--------------2.1 CDI Group ----------------2.4
Failure diagnosis --------------2.2 Ignition coil --------------2.5
Ignition system check----------2.3 Trigger --------------------2.6
2.1 Preparing documents
Work Instructions
1. Check the ignition system following the sequence listed in the table of failure diagnosis.
2. This ignition system is an electronically and automatically angling device. It is solidified in the CDI group and
you don’t have to adjust the ignition time.
3. Check the ignition system following the sequence listed in the table of failure diagnosis.
4. Do not make CDI of the ignition system fall down or hang down or hammer it with strong force (primary causes
for failure). Pay special attention during disassembly.
5. Failure of the ignition system is mostly caused by poor contact of the socket. Check whether each connector is in
good condition.
6. Check whether the heat value used for the spark plug is proper. If not, the engine may work abnormally or the
spark plug may be burnt.
7. Check in this chapter is based on the maximum voltage. It also refers to check on the impedance of the ignition
coil.
8. Check the main switch according to the conduction table.
9. Remove the magnetor and the stator according to instructions.
Preparing principles
Item Standard
value
Standard
C5HSA(NGK)
Hot type
C6HSA(NGK)
Spark plug
recommended
Cold type
C7HSA(NGK)
Spark plug gap
0.6-0.7mm
Primary coil
0.6
Ω
±10
％
With plug cap
5-11K
Ω
Ignition coil
impedance
（
2
0
）
Secondary coil
Without plug cap
0.5-5.5K
Ω
Impedance of trigger
（
20
）
100-500
Ω
Measure the maximum primary voltage of the ignition coil
95-400V
Trigger voltage
Above 1.7V
Charging coil voltage
95-400V
Tools
Attachments to the Maximum Voltage Table
Multimeter
