Yamaha YZ450FP 2023, Owner'S Service Manual

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ELECTRICAL COMPONENTS
8-48
 F)and 10  C (50  F), battery charging may
stop halfway without the battery becoming
fully charged even when the specified bat-
tery charger is used. If this occurs, discon-
nect the battery charger, and then resume
charging again.
TIP
This model uses a lithium-ion battery. When
new, the battery is supplied in sleep mode to
minimize current discharging until first-time use.
In the sleep mode, a voltage as low as approxi-
mately 0.1 V can be measured if voltage mea-
surement is performed. As such the battery
cannot be used, but this is not a malfunction. By
activating the battery as follows, the sleep mode
will be canceled and the battery can be used
normally.
Charging (activation) steps
1. Remove:
• Seat
Refer to “GENERAL CHASSIS” on page 4-1.
2. Disconnect:
•
Battery leads
(from the battery terminals)
NOTICE
ECA13700
First, disconnect the negative battery lead,
and then the positive battery lead.
3. Remove:
•
Battery
4. Connect the battery charger (special tool) to
the battery.
TIP
•
For instructions on charging and handling the
battery charger, refer to the battery charger’s
instruction manual.
• Once battery charging starts, the sleep mode
is canceled.
5. Charge the battery until it is fully charged.
6. Install:
•
Battery
7. Connect:
•
Battery lead
(to the battery terminals)
NOTICE
ECA26980
First, connect the positive battery lead, and
then the negative battery lead.
8. Check:
•
Battery terminal
Dirt

Clean with a wire brush.
Loose connection

Connect properly.
9. Lubricate:
•
Battery terminal
10.Install:
•
Seat
Refer to “GENERAL CHASSIS” on page 4-1.
Checking the battery
NOTICE
ECA26080
The battery has a limited service life. If the
battery cannot be charged or it is determined
that the battery cannot be used after check-
ing the battery, it should be replaced. When
replacing the battery, be sure to use a
Yamaha genuine lithium-ion battery.
TIP
Do not check the battery at high temperature of
65

C (149

F) or more or low temperatures be-
low 10

C (50

F). Otherwise, the control feature
preventing battery charging and discharging will
temporarily intervene.
1. Check:
• Battery
a. If the battery is hot, wait until the battery
has cooled down to the ambient tempera-
ture.
b. Measure the voltage between the battery
terminals.
13.25 V or more

The battery is normal.
Checking is finished.
Less than 13.25 V

Go to step (c).
c. Connect the battery charger (special tool)
to the battery and charge it.
TIP
For instructions on charging and handling the
battery charger, refer to the battery charger’s in-
Lithium battery charger
90890-05376
Lithium battery charger
DBY-ACC51-70-02
Recommended lubricant
Dielectric grease
Lithium battery charger
90890-05376
Lithium battery charger
DBY-ACC51-70-02