Yamaha YXR70FX Service Manual page 140

CHECKING AND CHARGING THE BATTERY
1
1
TIP:
_
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:
• battery cover 1
2. Disconnect:
• battery leads
(from the battery terminals)
NOTICE
2
_
First, disconnect the negative battery lead
1, and then the positive battery lead 2.
3. Remove:
• battery
4. Check:
• battery charge
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a. Connect a pocket tester to the battery termi-
nals.
Positive tester probe →
Negative tester probe →
TIP:
_
• 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 - 56
CHK
ADJ
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positive battery terminal
negative battery terminal
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