Yamaha 2009 YZF-R1 (Y) Service Manual page 517

• DO NOT SMOKE when charging or han-
dling batteries.
• KEEP BATTERIES AND ELECTROLYTE
OUT OF REACH OF CHILDREN.
• Avoid bodily contact with electrolyte as it
can cause severe burns or permanent eye
injury.
FIRST AID IN CASE OF BODILY CONTACT:
EXTERNAL
• Skin — Wash with water.
• Eyes — Flush with water for 15 minutes
and get immediate medical attention.
INTERNAL
• Drink large quantities of water or milk fol-
lowed with milk of magnesia, beaten egg
or vegetable oil. Get immediate medical
attention.
ECA13660
• This is a VRLA (Valve Regulated Lead
Acid). Never remove the sealing caps
because the balance between cells will
not be maintained and battery perfor-
mance will deteriorate.
• Charging time, charging amperage and
charging voltage for an VRLA (Valve Reg-
ulated Lead Acid) battery are different
from those of conventional batteries. The
VRLA (Valve Regulated Lead Acid) bat-
tery should be charged as explained in
the charging method illustrations. If the
battery is overcharged, the electrolyte
level will drop considerably. Therefore,
take special care when charging the bat-
tery.
TIP
Since VRLA (Valve Regulated Lead Acid) bat-
teries are sealed, it is not possible to check the
charge state of the battery by measuring 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:
• Rider seat
• Battery cover
Refer to "GENERAL CHASSIS" on page
4-1.
2. Disconnect:
• Battery leads
(from the battery terminals)
ELECTRICAL COMPONENTS
ECA13640
First, disconnect the battery negative lead
"1", and then battery positive lead "2".
3. Remove:
• Battery
4. Check:
• Battery charge
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a. Connect a pocket tester to the battery ter-
minals.
• Positive tester probe
Positive battery terminal
• Negative tester probe
Negative battery terminal
TIP
• The charge state of an VRLA (Valve Regu-
lated Lead Acid) battery can be checked by
measuring its open-circuit voltage (i.e., the
voltage when the positive battery terminal is
disconnected).
• No charging is necessary when the open-cir-
cuit voltage equals or exceeds 12.4 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%
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