KTM 250 EXC RACING Owner's Manual page 166

Measuring conditions:
– cold engine
– seat and tank removed
– all connectors and the ground connection in a non-corroding condition, connectors tightly connected
– battery loaded (if installed) and light switch turned off
– the gap between the rotor and pulse generator must be set to 0.75 mm
– compression release lever pulled
– kick the kick starter forcefully at least 5 times for each measurement
1
4
R
STATIC IGNITION VALUES KOKUSAN 4K-3A, B
3
S
5
Check the pulse generator for an output signal – two-pin connector
with green and red cable colors (also see circuit diagram on next page):
– Apply the red measuring lead of the peak voltage adapter
584.29.042.000 to the green cable and the black measuring lead to
the red cable, disconnect connector
Multimeter display: 4.5 volts +/- 0.5 volt
– Same measurement with CDI unit connected
Multimeter display: 3 volts +/- 0.5 volt
Check the generator charging coil for ignition capacitor charge – two-pin
connector with black/red and red/white cable colors (also see circuit
3
diagram on next page):
– Apply the red measuring lead of the peak voltage adapter to the
black/red cable and the black measuring lead to the red/white cable,
disconnect connector to disconnect the CDI unit
3
Multimeter display: 30 volts (35 volts for 400 SX) +/- 5 volts
– Same measurement with connectors CDI unit connected
Multimeter display: 200 volts +/- 10 volts
Check the primary voltage output
circuit diagram on opposite page) for output voltage (blue/white cable
color):
– Apply the red measuring lead
black/white cable (ground) and the black measuring lead
blue/white cable, CDI unit
Multimeter display: 200 volts +/- 10 volts
to disconnect the CDI unit
1
2
for ignition coil control (also see
4
of the peak voltage adapter to the
R
and ignition coil connected
2 5
7-8E
1
2
to the
S