Suzuki RM-z450 Owner's Service Manual page 257

• Connect the multi-circuit tester with the peak voltage adaptor
as follows.
+ Probe: Black/White lead wire
- Probe: White/Blue lead wire
NOTE:
Do not disconnect the ignition coil lead wire coupler.
" 09900-25008: multi-circuit tester set
• Measure the ignition coil primary peak voltage by depressing
the kick starter lever several times forcefully.
When using the multi-circuit tester and peak volt
adaptor, refer to the appropriate instruction manual.
Repeat the above procedure a few times and measure the high-
est ignition coil primary peak voltage. If the voltage is lower than
the standard values, inspect the ignition coil. (!below)
While testing, do not touch the tester probes and
spark plug to prevent receiving an electric shock.
# Ignition coil primary peak voltage: 175 V and more
$ Tester knob indication: Voltage (%)
IGNITION COIL RESISTANCE
• Remove the seat, radiator covers and fuel tank.
(!5-2)
• Disconnect the ignition coil lead wire coupler 1 and spark
plug cap 2.
• Measure the ignition coil resistance in both the primary and
secondary windings using the multi-circuit tester. If the resis-
tance is not within the standard range, replace the ignition coil
with a new one.
# Ignition coil resistance
0.17 – 0.70 Ω (W/BI – B/W)
Primary:
Secondary: 9 – 14 kΩ (Spark plug cap – B/W)
" 09900-25008: multi-circuit tester set
& Tester knob indication: Resistance (Ω)
CAUTION
* WARNING
ELECTRICAL SYSTEM
Ignition coil
W/BI
ECM
Peak
volt
adaptor
15-14
New
spark
plug
B/W