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Yamaha TT-R90E 2003 Fahrer- Und Wartungshandbuch Seite 158

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BATTERY INSPECTION AND CHARGING
a
1
1
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
G
Rear fender
G
2. Disconnect:
Battery lead coupler 1
G
(from the battery terminals)
NOTE:
Push down on the tab a, and then remove the
battery lead coupler.
3. Remove:
Battery
G
4. Measure:
Battery charge
G
Measurement steps:
Connect a pocket tester 1 to the battery
G
terminals.
Tester positive probe →
Tester negative probe →
NOTE:
The charge state of an MF battery can be
G
checked by measuring its open-circuit
voltage (i.e., the voltage when the positive
terminal is disconnected).
No charging is necessary when the open-
G
circuit voltage equals or exceeds 12.8 V.
Check the charge of the battery, as shown
G
in the charts and the following example.
Example
Open-circuit voltage = 12.0 V
Charging time = 6.5 hours
Charge of the battery = 20 ~ 30%
3 - 21
INSP
ADJ
battery positive terminal
battery negative terminal

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Tt-r90er 2003

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