Yamaha YBR250 2007, Service Manual

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CHK
ADJ
CHECKING AND CHARGING THE BATTERY
3-44
3. Remove:
• battery
4. Check:
• battery charge
a. Connect a pocket tester to the battery terminals
Since MF batteries are sealed, it is not possible to
check the charge state of the battery by measuring
the specific gravity of the electrolyte. Therefore, the
charge of the battery has to be checked by
measuring the voltage at the battery terminals.
NOTE:
First, disconnect the negative battery lead
1 1 1 1 1
,
and then the positive battery lead
2 2
2 2
2
.
CAUTION:
TTTTTTTTTTTTTTTTTTTTTTTTTTTTT T T TTTTTT T T T T
T TT T TT T TT T TT T TT T TT T TT T TT T TT T T T T T TT T TT T T T T
• The charge state of an MF battery can be
checked by measuring its open-circuit voltage
(i.e., the voltage when the positive battery terminal
is disconnected).
• No charging is necessary when the open-circuit
voltage equals or exceeds 12.8 V.
NOTE:
1. Remove:
• seat
Refer to "COWLING AND SIDE COVERS".
• band
2. Disconnect:
• battery leads
(from the battery terminals)
Positive tester probe =>
positive battery terminal
Negative tester probe =>
negative battery terminal
b. Check the charge of the battery, as shown in the
charts and the following example.
Example
c. Open-circuit voltage = 12.0 V
d. Charging time = 6.5 hours
e. Charge of the battery = 20 ~ 30%
1
2
12,80V
Relationship between the open-circuit voltage and
the charging time at 20 °C (68 °F)
Open-circuito voltage (V)
13.0
12.5
12.0
11.5
5 6.5 10
Charging time (hours)
These values with the temperature, the condition
of the battery plates, and the electrolyte level.