Yamaha 1999 XVS1100, Service Manual

Page: 94 / 355

CHECKING AND CHARGING THE BATTERY
INSP
ADJ
Volt meter
Relationship between open-circuit
voltage and charging time at 20
_
C
Open-circuit voltage
Charging time (Hours)
D
This varies depending on the temperature, the state of
charge in battery plates and the electro lyte level.
3-38
NOTE:
CAUTION:
NOTE:
Since MF batteries are sealed, it is not possible
to check the charge state of the battery by mea-
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:
S
battery cover 1
2. Disconnect:
S
battery leads
(from the battery terminals)
First, disconnect the negative lead 1 , then
the positive lead 2 .
3. Remove:
S
battery
4. Check:
S
battery charge
a. Connect a pocket tester to the battery termi-
nals.
Tester positive lead battery positive
terminal
Tester negative lead battery negative
terminal
S
The charge state of a MF battery can be
checked by measuring its open-circuit voltage
(i.e., the voltage when the positive terminal is
disconnected).
S
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.
Example
c. Open-circuit voltage = 12.0 V
d. Charging time = 6.5 hours
e. Charge of the battery = 20
30 %
5. Charge:
S
battery
(refer to the appropriate charging method il-
lustration)