Yamaha YFM700RV 2006, Service Manual

Page: 139 / 409

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CHK
ADJ
CHECKING AND CHARGING THE BATTERY
NOTE:
_
Since MF batteries are sealed, it is not possi-
ble to check the charge state of the battery by
measuring the specific gravity of the electro-
lyte. Therefore, the charge of the battery has to
be checked by measuring the voltage at the
battery terminals.
1. Remove:
• seat
• battery holding bracket
Refer to “SEAT, FENDERS AND FUEL
TANK”.
2. Disconnect:
• battery leads
(from the battery terminals)
CAUTION:
_
First, disconnect the negative battery lead
1 , and then the positive battery lead 2 .
3. Remove:
• battery
4. Check:
• battery charge
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Connect a pocket tester to the battery termi-
nals.
NOTE:
_
• The charge state of an MF battery can be
checked by measuring its open-circuit volt-
age (i.e., the voltage when the positive termi-
nal is disconnected).
• No charging is necessary when the open-cir-
cuit voltage equals or exceeds 12.8 V.
Positive tester probe
→
positive battery terminal
Negative tester probe
→
negative battery terminal
1
2
Relationship between the open-circuit voltage
and the charging time at 20 °C (68 °F)
Charging time (hours)
O
pen
-circuit
volt
ag
e (
V
)
These values vary with the temperature and the condi-
tion of the battery plates.