The operation of the IC igniter (Figure 21)
can be checked simply by removing one of each
pair of spark plugs, grounding it against the
cylinder head while the plug lead is connected,
turning the ignition ON a n d touching a
screwdriver to the pickup coil core (Figure 22).
If the IC igniter is good, the plug will spark.
Remember that t h e
I C igniter
battery-powered and will not function if the
battery is dead. The following IC igniter test
can be made on the motorcycle.
1. Remove one of each pair of spark plugs and
against the cylinder head while its
plug wire is connected.
2. Disconnect the 4-pole connector from the
pickup coils (Figure 20).
3. Turn the ignition ON and connect a positive
12 volt source to the black lead and a
12 volt source to the blue lead. As
the voltage is connected, the plug should spark.
4. Repeat the test for the other pair of plugs,
to the yellow lead from the IC
igniter and negative
to the red lead.
5. Ifthe IC igniter fails these tests, install a new
one. If the IC igniter passes these tests but you
still have an ignition problem that can't be
traced to any other part of the ignition system,
substitute an IC igniter that you know is good
and see if that solves the problem. Some
transistorized ignition troubles just won't show
up on your workbench.
The charging system consists of the battery.
alternator, voltage regulator and rectifier.
Figure 23 is a schematic diagram ofthe 3-phase
charging system. The rectifier and regulator are
combined in one solid-state unit.
Early models have a single phase
charging systetn which .funcrions much
the same as the 3-phase system. The
single phasesystem is easily identified by
having only 2 leads corning fvom the
alternator, instead o f 3 .
T h e alternator generates an alternating
current (AC) which the rectifier converts to
direct current (DC). The regulator maintains
the voltage to the battery and load (lights.
ignition, etc.) at a constant voltage, regardless
of variations in engine speed and electrical
Whenever charging system trouble is
suspected, make sure the battery is good before
going any further. Check the specific gravity as
described in this chapter. Battery voltage
3-PHASE CHARGING SYSTEM
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