2014 YAMAHA SR400 fuel

INSTRUMENT AND CONTROL FUNCTIONS
3-10
1
234
5
6
7
8
9
10
11
12
EAU59490
Fuel cockThe fuel cock regulates and filters the
fuel supply from the fuel pump to the
fuel injector.
The fuel cock has two positions:
ON
With the lever in this position, fuel will
be supplied to the engine. Normal oper-
ation is done with the lever in this posi-
tion. OFF
With the lever in this position, fuel will
not flow. Use this lever position when
performing certain maintenance work
or when storing the vehicle for a pro-
longed time.
EAU13651
KickstarterTo start the engine, fold out the kick-
starter lever, move it down lightly with
your foot until the gears engage, and
then push it down smoothly but force-
fully. This model is equipped with a pri-
mary kickstarter, allowing the engine to
be started in any gear if the clutch is
disengaged. However, shifting the
transmission into the neutral position
before starting is recommended.
1. Arrow mark positioned over “ON”
1
1. Arrow mark positioned over “OFF”
1
1. Kickstarter
1
2RD-9-E0.book 10 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

4-1
1
2
34
5
6
7
8
9
10
11
12
FOR YOUR SAFETY – PRE-OPERATION CHECKS
EAU15598
Inspect your vehicle each time you use it to make sure the vehi cle is in safe operating condition. Always follow the inspection
and maintenance procedures and schedules described in the Owner’s Manual.
WARNING
EWA11152
Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment damage.
Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures provided inthis manual, have the vehicle inspected by a Yamaha dealer.
Before using this vehicle, check the following points:
ITEM CHECKS PAGE
Fuel Check fuel level in fuel tank.
Refuel if necessary.
Check fuel line for leakage.
Check fuel tank breather hose for
obstructions, cracks or damage, and check
hose connection. 3-7, 3-9
Engine oil Check oil level in oil tank.
If necessary, add recommended oil to specified level.
Check vehicle for oil leakage. 6-9
Front brake Check operation.
If soft or spongy, have Yamaha dealer bleed hydraulic system.
Check lever free play.
Adjust if necessary.
Check brake pads for wear.
Replace if necessary.
Check fluid level in reservoir.
If necessary, add specified brake fluid to specified level.
Check hydraulic system for leakage. 6-17, 6-20
Rear brake Check operation.
Check pedal free play.
Adjust if necessary. 6-18, 6-20
2RD-9-E0.book 1 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

5-1
1
2
3
45
6
7
8
9
10
11
12
OPERATION AND IMPORTANT RIDING POINTS
EAU15952
Read the Owner’s Manual carefully to
become familiar with all controls. If
there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWA10272
Failure to familiarize yourself with
the controls can lead to loss of con-
trol, which could cause an accidentor injury.
EAU59360
TIPThis model is equipped with:
a lean angle sensor to stop the en-
gine in case of a turnover. In this
case, turn the key to “OFF” and
then to “ON”. Failing to do so will
prevent the engine from starting
even though the engine will crank
when pushing the kick starter lever
down.

an engine auto-stop system. The
engine stops automatically if left
idling for 20 minutes. If the engine
stops, simply push the kick starterlever down to restart the engine.
EAU59530
Starting the engineIn order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:
The transmission is in the neutral
position.

The transmission is in gear with
the clutch lever pulled and the sid-
estand up.
See page 3-13 for more informa-
tion.
1. Turn the key to “ON” and set the engine stop switch to “ ”.
The engine trouble warning light
and fuel level warning light should
come on for a few seconds, then
go off.
NOTICE
ECA16712
If the warning light does not come
on initially when the key is turned to
“ON”, or if the warning light remains
on, see page 3-2 for the warning lightcircuit check.
2. Shift the transmission into the neu- tral position. The neutral indicator
light should come on. If not, ask a
2RD-9-E0.book 1 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

OPERATION AND IMPORTANT RIDING POINTS
5-3
1
2
3
45
6
7
8
9
10
11
12
NOTICE
ECA10261

Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.

Always use the clutch while
changing gears to avoid damag-
ing the engine, transmission,
and drive train, which are not
designed to withstand theshock of forced shifting.
EAU16811
Tips for reducing fuel
consumptionFuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:
Shift up swiftly, and avoid high en-
gine speeds during acceleration.

Do not rev the engine while shifting
down, and avoid high engine
speeds with no load on the engine.

Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
EAU16842
Engine break-inThere is never a more important period
in the life of your engine than the period
between 0 and 1600 km (1000 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1600 km (1000 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided.
EAU17094
0–1000 km (0–600 mi)
Avoid prolonged operation above 3500
r/min. NOTICE: After 1000 km (600
mi) of operation, the engine oil must
be changed and the oil filter car-
tridge or element replaced.
[ECA10303]
1000–1600 km (600–1000 mi)
Avoid prolonged operation above 4200
2RD-9-E0.book 3 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

OPERATION AND IMPORTANT RIDING POINTS
5-4
1
2
3
456
7
8
9
10
11
12
r/min.
1600 km (1000 mi) and beyond
The vehicle can now be operated nor-
mally.
NOTICE
ECA10311

Keep the engine speed out of
the tachometer red zone.

If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-cle.
EAU17214
ParkingWhen parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10312

Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.

Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.

Do not park near grass or other
flammable materials whichmight catch fire.
2RD-9-E0.book 4 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-3
1
2
3
4
56
7
8
9
10
11
12
EAU46862
TIP
The annual checks must be performed every year, except if a kilometer-based maintenance, or for the UK, a
mileage-based maintenance, is performed instead.

From 50000 km (30000 mi), repeat the maintenance intervals starting from 10000 km (6000 mi).

Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technicalskills.
EAU46911
Periodic maintenance chart for the emission control systemNO. ITEM CHECK OR MAINTENANCE JOB ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)
1 *Fuel line Check fuel hoses for cracks or
damage. 
2 Spark plug Check condition.
Clean and regap.


3 *Valves Check valve clearance.
Adjust. 
4 *Fuel injection Check engine idle speed. 
5 *Muffler and exhaust
pipe Check the screw clamp(s) for
looseness. 
6 *Air induction
system Check the air cut-off valve, reed
valve, and hose for damage.
Replace any damaged parts if necessary. 
2RD-9-E0.book 3 ページ ２０１３年１１月２８日　木曜日　午後４時１８分

PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
1
2
3
4
56
7
8
9
10
11
12
EAU44735
Checking the engine idling
speedCheck the engine idling speed and, if
necessary, have it corrected by a
Yamaha dealer.
EAU21385
Checking the thrott le grip free
playThe throttle grip free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
inner edge of the throttle grip. Periodi-
cally check the throttle grip free play
and, if necessary, have a Yamaha
dealer adjust it.
EAU21402
Valve clearanceThe valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
Engine idling speed: 1200–1400 r/min
1. Throttle grip free play
1
2RD-9-E0.book 13 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