ZENER
DIODE
The Zener diode is a small electronic device that acts as a by-pass valve
to divert surplus charging current away from the batte
ry
. It acts
as
a
vo
lt
a
ge
regulator and controls the current into
th
e battery, and is mounted
on the air
fil
ter hous
in
g to ensu
re
efficient coolin
g.
Care must be taken
t
herefor
e n
ot
to impair the flow of air around the heat s
in
k. Do not fit the
tag on the red earthing wire between the diode and the heat
si
nk.
Providing the diode
is
kept clean,
to
ensure maximum
ef
ficiency no
maintenance
will be necessary.
Fig. 12.
Zener
diode, Model ZD71 5
Caution
- The body of the Zener diode
is
made of copper to ensure
maximum
heat conductivity. This means that the fixing stud has a
relatively low tensile strength, and should not be subjected to a tightening
torque greater than
2lbs.
ft.
(27.6kg. cm.).
Fuse
A line fuse is included
in
the electrical circ
ui
t and is located
in
the battery
live lead.
It
con
si
sts of a plastic tu
bu
lar holder with a standard 35 ampere
rating fuse spring
loaded and held
in
position by a bayonet type fixing cap
on the end of the holder.
It
may be necessary
to
increase
th
e fuse rating
if
additional electrical equipment
is
subsequently fitted
to
the machine.
If
the motorcycle engine at any time appears
10
run
erratically first check
that the fuse has not
blown, and then ascertain the cause before making
a replacement.
38
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