Yamaha YFM700RV 2009 Service Manual page 139

CHECKING AND CHARGING THE BATTERY
2
1
Relationship between the open-circuit voltage
and the charging time at 20 °C (68 °F)
Charging time (hours)
These values vary with the temperature and the condi-
tion of the battery plates.
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
M MMM M MMM M M MMM
a. Connect a pocket tester to the battery termi-
nals.
Positive tester probe →
Negative tester probe →
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.
3 - 61
CHK
ADJ
M M MMM M M MMM M
positive battery terminal
negative battery terminal
M MMM M MMM