2014 YAMAHA SR400 maintenance

PERIODIC MAINTENANCE AND ADJUSTMENT
6-27
1
2
3
4
56
7
8
9
10
11
12
EAU51951
Checking the front forkThe condition and operation of the front
fork must be checked as follows at the
intervals specified in the periodic main-
tenance and lubrication chart.
To check the condition
Check the front fork for damage and ex-
cessive oil leakage.
To check the operation 1. Place the vehicle on a level sur- face and hold it in an upright posi-
tion. WARNING! To avoid injury,
securely support the vehicle so
there is no danger of it falling
over.
[EWA10752]
2. While applying the front brake, push down hard on the handlebars
several times to check if the front
fork compresses and rebounds
smoothly.
NOTICE
ECA10591
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re-pair it.
EAU45512
Checking the steeringWorn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol-
lows at the intervals specified in the pe-
riodic maintenance and lubrication
chart.1. Place the vehicle on the center- stand. WARNING! To avoid inju-
ry, securely support the vehicle
so there is no danger of it falling
over.
[EWA10752]
2. Hold the lower ends of the front fork legs and try to move them for-
ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steering.
2RD-9-E0.book 27 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-28
1
2
3
4
567
8
9
10
11
12
EAU23292
Checking the wheel bearingsThe 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
BatteryThe battery is located under the seat.
(See page 3-11.)
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
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 OFCHILDREN.
To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possi ble if it seems to
have discharged. Keep in mind that the
battery tends to discharge more quickly
1. Battery
1
2RD-9-E0.book 28 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-29
1
2
3
4
56
7
8
9
10
11
12 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 batterycharger 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 cancause permanent battery damage.
EAU59441
Replacing the fusesThe main fuse is located inside the bat-
tery coupler. (See page 6-28.)
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 3-11.)
3. Remove the battery by removing the battery band.1. Battery coupler
2. Main fuse
3. Spare main fuse
3
1
2
2RD-9-E0.book 29 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-30
1
2
3
4
567
8
9
10
11
12
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 circuits, is located un-
der the seat. (See page 3-11.) 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 3-11.)
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
1. Battery
2. Battery band
1. Battery coupler
12
1
Specified fuse: 30.0 A1. Fuse box
1
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
12
3 4
5
7
6
2RD-9-E0.book 30 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-31
1
2
3
4
56
7
8
9
10
11
12 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.
EAU23799
Replacing the headlight bulbThis model is equipped with a halogen
bulb headlight. If the headlight bulb
burns out, replace it as follows.NOTICE
ECA10651
Take care not to damage the follow-
ing parts:
Headlight bulb
Do not touch the glass part of
the headlight bulb to keep it free
from oil, otherwise the transpar-
ency of the glass, the luminosity
of the bulb, and the bulb life will
be adversely affected. Thor-
oughly clean off any dirt and fin-
gerprints on the headlight bulb
using a cloth moistened with al-
cohol or thinner.

Headlight lens
Do not affix any type of tinted
film or stickers to the headlight
lens.
Do not use a headlight bulb of awattage higher than specified. 1. Remove the headlight unit by re-
moving the screws.
Specified fuses:Main fuse:30.0 A
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
1. Do not touch the glass part of the bulb.
1. Screw1
2RD-9-E0.book 31 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-32
1
2
3
4
567
8
9
10
11
12
2. Disconnect the headlight coupler,
and then remove the headlight
bulb cover.
3. Unhook the headlight bulb holder, and then remove the burnt-out bulb.
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.
EAU24134
Replacing the ta il/brake light
bulb1. Remove the tail/brake light lens by
removing the screws.
2. Remove the burnt-out bulb by pushing it in and turning it counter-
clockwise.
1. Screw
1. Headlight coupler
2. Headlight bulb cover
1
1
2
1. Headlight bulb holder
1
1. Screw
2. Tail/brake light lens
1 2
2RD-9-E0.book 32 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-33
1
2
3
4
56
7
8
9
10
11
12 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] EAU60010
Replacing a turn
signal light
bulb1. Remove the turn signal light lens,
turn signal light rim and gasket by
removing the screws.
2. Remove the burnt-out bulb bypushing 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. Tail/brake light bulb
1
1. Turn signal light lens
2. Screw
1
2
1. Turn signal light lens
2. Turn signal light rim
3. Gasket
3
2
1
2RD-9-E0.book 33 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-34
1
2
3
4
567
8
9
10
11
12
EAU33416
Replacing the auxi liary light
bulbIf 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.
3. Remove the burnt-out bulb by pushing it in and turning it counter-
clockwise.1. Screw
1. Screw1
1
1. Auxiliary light bulb socket
1. Auxiliary light bulb socket
2. Auxiliary light bulb
1
1
2
2RD-9-E0.book 34 ページ ２０１３年１１月２８日　木曜日　午後４時１８分