Checking And Charging The Battery - Yamaha XG250 Service Manual

EAS28030

CHECKING AND CHARGING THE BATTERY

EWA13290
WARNING
Batteries generate explosive hydrogen gas
and contain electrolyte which is made of poi-
sonous and highly caustic sulfuric acid.
Therefore, always follow these preventive
measures:
Wear protective eye gear when handling
●
or working near batteries.
Charge batteries in a well-ventilated area.
●
Keep batteries away from fire, sparks or
●
open flames (e.g., welding equipment,
lighted cigarettes).
DO NOT SMOKE when charging or han-
●
dling batteries.
KEEP BATTERIES AND ELECTROLYTE
●
OUT OF REACH OF CHILDREN.
Avoid bodily contact with electrolyte as it
●
can cause severe burns or permanent eye
injury.
FIRST AID IN CASE OF BODILY CONTACT:
EXTERNAL
Skin — Wash with water.
●
Eyes — Flush with water for 15 minutes
●
and get immediate medical attention.
INTERNAL
Drink large quantities of water or milk fol-
●
lowed with milk of magnesia, beaten egg
or vegetable oil. Get immediate medical at-
tention.
ECA13660
CAUTION:
This is a sealed battery. Never remove the
●
sealing caps because the balance be-
tween cells will not be maintained and bat-
tery performance will deteriorate.
Charging time, charging amperage and
●
charging voltage for an MF battery are dif-
ferent from those of conventional batter-
ies. The MF battery should be charged as
explained in the charging method illustra-
tions. If the battery is overcharged, the
electrolyte level will drop considerably.
Therefore, take special care when charg-
ing the battery.
NOTE:
Since MF batteries are sealed, it is not possible
to check the charge state of the battery by mea-
ELECTRICAL COMPONENTS
suring the specific gravity of the electrolyte.
Therefore, the charge of the battery has to be
checked by measuring the voltage at the battery
terminals.
1. Remove:
Side cover (right)
●
Refer to "GENERAL CHASSIS" on page 4-1.
Battery band
●
2. Disconnect:
Battery leads
●
(from the battery terminals)
ECA13640
CAUTION:
First, disconnect the negative battery lead
"1", and then positive battery lead "2".
1
3. Remove:
Battery
●
4. Check:
Battery charge
●
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect a pocket tester to the battery termi-
nals.
Positive tester probe →
●
positive battery terminal
Negative tester probe →
●
negative battery terminal
NOTE:
The charge state of an MF battery can be
●
checked by measuring its open-circuit voltage
(i.e., the voltage when the positive battery ter-
minal is disconnected).
No charging is necessary when the open-cir-
●
cuit voltage equals or exceeds 12.8 V.
b. Check the charge of the battery, as shown in
the charts and the following example.
7-38
2