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Tecnico cb250 Manual page 154

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Ignition System lnspection
NOTE
If no spark jumps at all plug, check all connections for
loose or poor contact before measuring peak voltage.
The reading differs depending on the multitester input
impedance. Therefore, use only Honda genuine digital
multitester or commerciallv available multitesters with
the input impedance higher than 10 MO/DCV.
If using Imrie diagnostic tester (model 625), follow the
munufacturer's instructions.
Connect the peak voltage adaptor to the digital multitester.
(
~
\
(2) PEAK VOLT AGE ADAPTOR
Ignitíon System
1
S.~OL
1
Imrie diagnostic tester (model 625) made in Australia or
Peak voltage adaptar
07HGJ-0020100 with
Digital multitester
07411 - 0020000
Ignítion Coil Prímary Peak Voltage
NOTE
Check all svstem connections before inspection. Poor
connected connectors can cause incorrect readings.
Check thatthe cylinder compression is normal and the
spark plug is installed correctlv in all cylinders.
Place the motorcycle on its center stand and shift into neutral.
Remove the spark plug caps from the plugs on cylinder head,
install a known good sparkp.lugs to the plug caps and ground
it to the engine as shown.
Connect the peak voltaqe adaptor EB probe to the ignition coil
primary (black/yellow) wire terminals and the
e
probe to the
bodv ground.
Turn the ignition switch ON and engine stop switch is to RUN.
Crank the engine with starter motor and read the ;gnition coil
prirnarv peak voltage.
Connection:
Black/vellcw wire terminal EB-Bodv ground
e
Peak voltage: 100 V mínimum
To avoid possible electrical shock during voltage meas-
urements. do not touch test probe metal parts.
If the peak voltage is abnormal, check an open circuit or poor-
IV
connected connectorsin black/vellow wires.
If no defects are found in the harness, refer to the troubleshoot-
ing chart (page14-3).
(1) GOOD KNOWN SPARK PLUGS
14.:5

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