Yamaha YZF-R15 Service Manual page 319

INTERNAL
• Drink large quantities of water or milk fol-
lowed with milk of magnesia, beaten egg or
vegetable oil. Get immediate medical atten-
tion.
CAUTION:
• This is a sealed battery. Never remove the
sealing caps because the balance between
cells will not be maintained and battery per-
formance will deteriorate.
• Charging time, charging amperage and
charging voltage for an MF battery are dif-
ferent from those of conventional batteries.
The MF battery should be charged accord-
ing to the appropriate charging method. If
the battery is overcharged, the electrolyte
level will drop considerably. Therefore,
take special care when charging the bat-
tery.
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:
• Seat
Refer to "GENERAL CHASSIS" on page 4-1.
2. Disconnect:
• Battery leads
(from the battery terminals)
CAUTION:
First, disconnect the negative battery lead
"1", and then positive battery lead "2".
2
1
3. Remove:
• Battery
4. Check:
• Battery charge
ELECTRICAL COMPONENTS
s s s s s s s s s s s s s s s s s s s s s s s s s s s s
a. Connect a multimeter to the battery termi-
nals.
• Positive tester probe →
positive battery terminal
• Negative tester probe →
negative battery terminal
NOTE:
• The charge state of an MF battery can be
checked by measuring its open-circuit voltage
(i.e., the voltage when the positive battery ter-
minal is disconnected).
• 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
Open-circuit voltage = 12.0 V
Charging time = 6.5 hours
Charge of the battery = 20–30%
A. Open-circuit voltage (V)
B. Charging time (hours)
C. Relationship between the open-circuit voltage
and the charging time at 20 °C (68 °F)
D. These values vary with the temperature, the
condition of the battery plates, and the
electrolyte level.
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