HYOSUNG 2010 ST7 Service Manual page 268

BATTERY
Complaint
Sulfation acidic
white powdery
substance or
spots on
surfaces of
cell plates.
Battery runs down
quickly.
Reversed battery
polarity.
Battery sulfation
Battery dicharges
too rapidly.
Symptom and possible causes
1. Not enough electrolyte.
2. Battery case is cracked.
3. Battery has been left in a run-down condition for a long time.
4. Contaminated electrolyte.
(Foreign matter has enters the battery and become mixed
with the electrolyte.)
1. The charging method is not correct.
2. Cell plates have lost much of their active material as a result of
over-charging.
3. A short-circuit condition exists within the battery due to excessive
accumulation of sediments caused by the high electrolyte specific
gravity.
4. Electrolyte specific gravity is too low.
5. Contaminated electrolyte.
6. Battery is too old.
The battery has been connected the wrong way round in the sys-
tem, so that it is being charged in the reverse direction.
1. Charging rate too low or too high. (When not in use, batteries
should be recharged at least once a month to avoid sulfation.)
2. Battery electrolyte excessive or insufficient, or its specific gravity
too high or too low.
3. The battery left unused for too long in cold climate.
1. Dirty container top and sides.
2. Impurities in the electrolyte or electrolyte specific gravity is too
high.
SERVICING INFORMATION 9-12
Remedy
Add distilled water, if the bat-
tery has not been damaged
and sulfation has not adv-
anced too far, and recharge.
Replace the battery.
Replace the battery or rec-
harge.
If sulfation has not advanced
far, try to restore the battery
by replacing the electrolyte,
recharing it fully with the bat-
tery detached from the motor-
cycle and then adjusting elec-
trolyte specific gravity.
Check the generator, regulator
/rectifier and circuit connec-
tions, and make necessary
adjustments to obtain speci-
fied charging operation.
Replace the battery, and cor-
rect the charging system.
Replace the battery.
Recharge the battery fully
and adjust electrolyte spe-
cific gravity.
Replace the electrolyte,
recharge the battery and
then adjust specific gravity.
Replace the battery.
Replace the battery and be
sure to connect the battery
properly.
Replace the battery.
Keep the electrolyte up to
the prescribed level, or
adjust the specific gravity
by consulting the battery
maker s directions.
Replace the battery, if badly
sulfated.
Clean.
Change the electrolyte by
consulting the battery
maker s directions.