Ignition System - Sym HD 125 Service Manual

17. ELECTRICAL SYSTEM

Ignition System

Ignition circuit diagram
Black/white
Main switch
C.D.I unit
Disconnect connectors of the C.D.I unit.
Check the following connectors as indicated in the table at the harness side.
Item
Main switch
Exciting coil
Pulse generator
Primary circuit
Ignition coil
Secondary circuit
17-8
To this chapter contents
CDI. Unit
Green/white
Black/red
Pulse generator
Exciting coil
Black/yellow
Blue/Yellow
Spark plug
Points to check
Black/white ~ green
Black/red ~ green
Green/White ~ Blue/yellow
Black/yellow ~ green
Black/yellow ~ with no cap
Black/yellow ~ with cap
Green
Ignition
coil
Green
Result
-
100~200Ω
50~170Ω
0.17±10%Ω
3.6±10%Ω
7.3~11KΩ