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156 MAINTENANCE-ELECTRICAL
BATTERY
1.
When the level of the
elect
rolyte in the battery is low,
add
only distilled water to each cell, until the level is
at the upper level line marked on the outside of the
battery. Ordinary tap water is not a substitute for
distilled water
and
will shorten the life of the battery.
2. Never add sulphuric acid solution to the battery.
This
will
make the electrolyte solution too strong
and will ruin the battery within a very short time.
3.
Avoid
quick-charging the battery.
A
quick-charge
will
damage the
battery
plates.
4. Never let a good battery stand for more than 30
days without
giving
it
a
supplemental charge, and
never let a discharged battery
stand without
charging
it.
If
a battery stands for any length of
time,
it
slowly self-discharges.
Once it is discharged, the
plates sulphate (turn white), and
the
battery will
no
longer take a charge.
5. Keep the battery
well-charge~
during cold weather
so
that
the electrolyte
does
not freeze and crack open
the
battery.
The
more discharged the battery be-
comes, the more easily it freezes.
6.
Always keep the battery vent hose free of obstruc-
tion, and make sure it does not get pinched, crimped,
or melted shut by contact
with
the hot muffler. If
battery gases cannot escape through
this
hose, they
will
explode the battery.
7. DON'T
INSTALL THE BATTERY BACKWARDS.
The negative side
is
grounded.
Electrolyte
The electrolyte
is
dilute sulphuric acid.
The
standard
specific
gravity of
the electrolyte
used
in warm
climates
in a fully charged
battery is 1.260
at
20°C
(68°F). (In
particularly
cold
regions, a
solution
with
a standard
specific gravity
of 1.280
is
used).
The water in this
solution changes
to
a
gaseous
mixture due to chemical
action
in
the battery
and
escapes, which concentrates
the
acid in a charged
battery. Consequently, when the
level
of
the
electrolyte becomes
low,
on
ly distilled water
should
be
added.
If sulphuric acid is
added,
the solution
will damage the plates. Metal from the damaged plates
collects in the
bottom of the battery.
This
sediment
will
eventually cause
an internal
short
circuit.
The specific
gravity of
the
electrolyte is
measured
with a hydrometer and
is
the
most accurate
indication
of the condition of the battery. When
using
the
hy-
drometer, read
the
electrolyte
level
at the bottom of
the menicus (curved surface
of
the fluid).
See
Fig.
K1.
Fig. K2 shows
the
relationship
between
the specific
gravity of the
solution at 20°C
(68°F) and the
per·
centage
of battery cnarge. Since
specific gravity varies
with temperature, and
since the
temperature of the
solution being
checked likely
to be other
than
20°C
(68°F); the
formula given
below
should be used
to
com-
pute the
equivalent
specific
gravity for any
temperature.
When
the temperature
goes
up,
the specific gravity goes
down, and
vice versa.
Hydrometer
OCelsius
S20=St+
[
0.0007 (t-20)]
oFah
renheit
S5a=St + [0.0004
(t-68)]
St,= specific
gravity
at
the
present
temperature
S2
0
=specific gravity
at
20°C
S5s
=specific
gravity at
68° F
t=present
temperature
of
solution
Generally
speaking,
a
battery should be
charged
if
a
specific
gravity
reading
shows
it
to be
discharged
to
50%
or
less of full charge.
Specific Gravity/Battery Charge Relationship
1.28
$ 1.24
·~ 1.20
....
<,:,
u
1. 16
.r.,;:
·~ 1.12
0.
VI
1.08
1.04
1.00
.;
Full
Cha
rge
1.28
(20 C)
/
/
.,..
v
i,.
\
.,,
v
\
.,.
[ /
.,..
.,..
/
I
\
,
/
.,..
I.) ,
v
.,..
/
v
\
I
o
Full
Charge
1.26
(20.
C)
0
20
40
60
80
Battery Charge%
Initial charge
::-:.
100%
New
batteries for
Kawasak
i
motorcycles
are
dry
charged and can be used directly after
adding
the ele-
ctrolyte.
However,
the
effect
of the
dry charge
deter-
iorates
somewhat during
storage,
especially
if
any
air

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   Also See for Kawasaki Z250 1981

This manual is also suitable for:

Kz350 1981

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