2016 YAMAHA SR400 All

Periodic maintenance and adjustment
6-31
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EAU23292
Checking the wheel bearings
The front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer check
the wheel bearings.
EAU40447
Battery
The battery is located under the seat.
(See page 3-13.)
This model is equipped with a VRLA
(Valve Regulated Lead Acid) battery.
There is no need to check the electro-
lyte or to add distilled water. However,
the battery coupler connection needs to
be checked to make sure that it is se-
curely connected.
WARNING
EWA10761
Electrolyte is poisonous and
dangerous since it contains sul-
furic acid, which causes severe
burns. Avoid any contact with
skin, eyes or clothing and al-
ways shield your eyes when
working near batteries. In case
of contact, administer the fol-
lowing FIRST AID. EXTERNAL: Flush with plenty of water.
INTERNAL: Drink large quan- tities of water or milk and im-
mediately call a physician.
EYES: Flush with water for 15 minutes and seek prompt
medical attention.
Batteries produce explosive hy-
drogen gas. Therefore, keep
1. Battery
1
2RD-28199-E1.book 31 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-32
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14 sparks, flames, cigarettes, etc.,
away from the battery and pro-
vide sufficient ventilation when
charging it in an enclosed
space.
KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that the
battery tends to discharge more quickly
if the vehicle is equipped with optional
electrical accessories.
NOTICE
ECA16522
To charge a VRLA (Valve Regulated
Lead Acid) battery, a special (con-
stant-voltage) battery charger is re-
quired. Using a conventional battery
charger will damage the battery.
To store the battery 1. If the vehicle will not be used for more than one month, remove the
battery, fully charge it, and then
place it in a cool, dry place.
NOTICE: When removing the
battery, be sure the key is
turned to “OFF” before discon-
necting the coupler.
[ECA16323]
2. If the battery will be stored for more than two months, check it at least
once a month and fully charge it if
necessary.
3. Fully charge the battery before in- stallation. NOTICE: When install-
ing the battery, be sure the key
is turned to “OFF” before con- necting the coupler.
[ECA16931]
NOTICE
ECA16531
Always keep the battery charged.
Storing a discharged battery can
cause permanent battery damage.
2RD-28199-E1.book 32 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-33
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EAU59443
Replacing the fuses
The main fuse is located inside the bat-
tery coupler. (See page 6-31.)
If the main fuse is blown, replace it as
follows. 1. Turn the key to “OFF” and turn off all electrical circuits.
2. Remove the seat. (See page 3-13.)
3. Remove the battery by removing the battery band.
4. Disconnect the battery coupler. 5. Remove the blown fuse, and then
install a new fuse of the specified
amperage. WARNING! Do not
use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
6. Connect the battery coupler.
7. Install the battery by installing the battery band.
8. Install the seat.
9. Turn the key to “ON”.
10. If the fuse immediately blows again, have a Yamaha dealer
check the electrical system.
The fuse box, which contains the fuses
for the individual circ uits, is located un-
der the seat.
1. Battery coupler
2. Main fuse
3. Spare main fuse
1. Battery
2. Battery band
3
1
2
12
1. Battery coupler
Specified fuse: 30.0 A
1
2RD-28199-E1.book 33 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-34
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14 If a fuse is blown, replace it as follows.
1. Turn the key to “OFF” and turn off the electrical circuit in question.
2. Remove the seat. (See page 3-13.)
3. Remove the blown fuse, and then install a new fuse of the specified
amperage. WARNING! Do not
use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
4. Turn the key to “ON” and turn on the electrical circuit in question to
check if the device operates.
5. If a fuse immediately blows again, have a Yamaha dealer check the
electrical system.
1. Fuse box
1. Headlight fuse
2. Signaling system fuse
3. Ignition fuse
4. Backup fuse
5. Fuel injection system fuse
6. Parking lighting fuse
7. Spare fuse
1
12
3 4
5
7
6
Specified fuses: Signaling system fuse:
15.0 A
Headlight fuse: 15.0 A
Ignition fuse: 10.0 A
Backup fuse:
7.5 A
Fuel injection system fuse: 7.5 A
Parking lighting fuse: 7.5 A
2RD-28199-E1.book 34 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-36
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14 4. Place a new headlight bulb into po-
sition, and then secure it with the
bulb holder.
5. Install the bulb cover, and then connect the coupler.
6. Install the headlight unit by install- ing the screws.
7. Have a Yamaha dealer adjust the headlight beam if necessary.
EAU33417
Replacing the auxiliary light
bulb
If the auxiliary light bulb burns out, re-
place it as follows.1. Remove the headlight unit by re- moving the screws.
2. Remove the socket (together with the bulb) by pushing it in and turn-
ing it counterclockwise.
1. Headlight bulb holder
1
1. Screw
1. Screw
1. Auxiliary light bulb socket
1
1
1
2RD-28199-E1.book 36 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-37
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3. Remove the burnt-out bulb by
pushing it in and turning it counter-
clockwise.
4. Insert a new bulb into the socket, push it in, and then turn it clock-
wise until it stops.
5. Install the socket (together with the bulb) by pushing it in and turning it
clockwise until it stops.
6. Install the headlight unit by install- ing the screws.
EAU24135
Replacing the tail/brake light
bulb
1. Remove the tail/brake light lens byremoving the screws.
2. Remove the burnt-out bulb by pushing it in and turning it counter-
clockwise.
3. Insert a new bulb into the socket, push it in, and then turn it clock-
wise until it stops.
4. Install the lens by installing the screws. NOTICE: Do not over-
tighten the screws, otherwise
the lens may break.
[ECA10682]
1. Auxiliary light bulb socket
2. Auxiliary light bulb
1
2
1. Screw
2. Tail/brake light lens
1. Tail/brake light bulb
1 2
1
2RD-28199-E1.book 37 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-38
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EAU60010
Replacing a turn signal light
bulb
1. Remove the turn signal light lens, turn signal light rim and gasket by
removing the screws.
2. Remove the burnt-out bulb by pushing it in and turning it counter-
clockwise.
3. Insert a new bulb into the socket, push it in, and then turn it clock-
wise until it stops.
4. Install the gasket, rim and lens by installing the screws with the notch
on the rim and lens facing to in-
ward as shown. NOTICE: Do not
overtighten the screws, other-
wise the lens may break.
[ECA10682]
1. Turn signal light lens
2. Screw
1. Turn signal light lens
2. Turn signal light rim
3. Gasket
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1
2RD-28199-E1.book 38 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-39
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EAU24361
Front wheel
EAU59603
To remove the front wheel
WARNING
EWA10822
To avoid injury, securely support the
vehicle so there is no danger of it
falling over. 1. Loosen the wheel axle nut.
2. Loosen the wheel axle holder nuts.
3. Place the motorcycle on the cen- terstand.
4. Disconnect the speedometer ca- ble from the speedometer gear
unit. 5. Remove the wheel axle nut and
the washer.
6. Pull the wheel axle out, and then remove the collar and wheel.
NOTICE: Do not apply the brake
after the wheel and brake disc
have been removed, otherwise
the brake pads will be forced
shut.
[ECA11073]
To install the front wheel1. Install the speedometer gear unit into the wheel hub so that the pro-
jections mesh with the slots.
2. Install the collar into the right side of the wheel hub.
3. Lift the wheel up between the fork legs.
1. Wheel axle nut
1. Wheel axle holder nut
1
1
1. Speedometer cable
1. Slot
2. Speedometer gear unit
3. Projection
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3
1
2RD-28199-E1.book 39 ページ ２０１５年９月３日　木曜日　午後３時４２分