2014 YAMAHA SR400 engine

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MOTORCYCLE CARE AND STORAGE
EAU37834
Matte color cautionNOTICE
ECA15193
Some models are equipped with
matte colored finished parts. Be
sure to consult a Yamaha dealer for
advice on what products to use be-
fore cleaning the vehicle. Using a
brush, harsh chemical products or
cleaning compounds when cleaning
these parts will scratch or damage
their surface. Wax also should not
be applied to any matte colored fin-ished parts.
EAU26005
CareWhile the open design of a motorcycle
reveals the attractiveness of the tech-
nology, it also makes it more vulnera-
ble. Rust and corrosion can develop
even if high-quality components are
used. A rusty exhaust pipe may go un-
noticed on a car, however, it detracts
from the overall appearance of a motor-
cycle. Frequent and proper care does
not only comply with the terms of the
warranty, but it will also keep your mo-
torcycle looking good, extend its life
and optimize its performance.
Before cleaning 1. Cover the muffler outlet with a plastic bag after the engine has
cooled down.
2. Make sure that all caps and covers as well as all electrical couplers
and connectors, including the
spark plug cap, are tightly in-
stalled.
3. Remove extremely stubborn dirt, like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod- ucts onto seals, gaskets, sprock-
ets, the drive chain and wheel
axles. Always rinse the dirt and de-
greaser off with water.
Cleaning
NOTICE
ECA10773

Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.

Improper cleaning can damage
plastic parts (such as cowlings,
panels, windshields, headlight
lenses, meter lenses, etc.) and
the mufflers. Use only a soft,
clean cloth or sponge with wa-
ter to clean plastic. However, if
the plastic parts cannot be thor-
oughly cleaned with water, di-
luted mild detergent with water
may be used. Be sure to rinse
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MOTORCYCLE CARE AND STORAGE
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off any detergent residue using
plenty of water, as it is harmful
to plastic parts.

Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
contact with strong or abrasive
cleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.

Do not use high-pressure wash-
ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar-
eas: seals (of wheel and swing-
arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.

For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com-
pounds for plastic may leave
scratches on the windshield. Test the product on a small hid-
den part of the windshield to
make sure that it does not leave
any marks. If the windshield is
scratched, use a quality plastic
polishing compound after
washing.
After normal use
Remove dirt with warm water, a mild
detergent, and a soft, clean sponge,
and then rinse thoroughly with clean
water. Use a toothbrush or bottlebrush
for hard-to-reach areas. Stubborn dirt
and insects will come off more easily if
the area is covered with a wet cloth for
a few minutes before cleaning.
After riding in the rain, near the sea oron salt-sprayed roadsSince sea salt or salt sprayed on roads
during winter are extremely corrosive in
combination with water, carry out the
following steps after each ride in the
rain, near the sea or on salt-sprayed
roads.TIPSalt sprayed on roads in the winter may
remain well into spring. 1. Clean the motorcycle with cold wa- ter and a mild detergent, after the
engine has cooled down.
NOTICE: Do not use warm water
since it increases the corrosive
action of the salt.
[ECA10792]
2. Apply a corrosion protection spray on all metal, including chrome- and
nickel-plated, surfaces to prevent
corrosion.
After cleaning 1. Dry the motorcycle with a chamois or an absorbing cloth.
2. Immediately dry the drive chain and lubricate it to prevent it from
rusting.
3. Use a chrome polish to shine chrome, aluminum and stain-
less-steel parts, including the ex-
haust system. (Even the thermally
induced discoloring of stain-
less-steel exhaust systems can be
removed through polishing.)
4. To prevent corrosion, it is recom- mended to apply a corrosion pro-
tection spray on all metal,
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MOTORCYCLE CARE AND STORAGE
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ed, surfaces.
5. Use spray oil as a universal clean- er to remove any remaining dirt.
6. Touch up minor paint damage caused by stones, etc.
7. Wax all painted surfaces.
8. Let the motorcycle dry completely before storing or covering it.
WARNING
EWA11132
Contaminants on the brakes or tires
can cause loss of control.
Make sure that there is no oil or
wax on the brakes or tires.

If necessary, clean the brake
discs and brake linings with a
regular brake disc cleaner or ac-
etone, and wash the tires with
warm water and a mild deter-
gent. Before riding at higher
speeds, test the motorcycle’s
braking performance and cor-nering behavior.
NOTICE
ECA10801

Apply spray oil and wax spar-
ingly and make sure to wipe off any excess.

Never apply oil or wax to any
rubber and plastic parts, but
treat them with a suitable care
product.

Avoid using abrasive polishing
compounds as they will wearaway the paint.
TIP
Consult a Yamaha dealer for ad-
vice on what products to use.

Washing, rainy weather or humid
climates can cause the headlight
lens to fog. Turning the headlight
on for a short period of time will
help remove the moisture from thelens.
EAU43203
StorageShort-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover. Be
sure the engine and the exhaust sys-
tem are cool before covering the motor-
cycle.NOTICE
ECA10811

Storing the motorcycle in a
poorly ventilated room or cover-
ing it with a tarp, while it is still
wet, will allow water and humid-
ity to seep in and cause rust.

To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-cals are stored.
Long-term
Before storing your motorcycle for sev-
eral months: 1. Follow all the instructions in the “Care” section of this chapter.
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2. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
3. Perform the following steps to pro- tect the cylinder, piston rings, etc.
from corrosion.
a. Remove the spark plug cap and spark plug.
b. Pour a teaspoonful of engine oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several times with the starter. (This will
coat the cylinder wall with oil.)
e. Remove the spark plug cap from the spark plug, and then
install the spark plug and the
spark plug cap. WARNING! To
prevent damage or injury
from sparking, make sure to
ground the spark plug elec-
trodes while turning the en-
gine over.
[EWA10952]
4. Lubricate all control cables and the pivoting points of all levers and
pedals as well as of the sidestand/
centerstand.
5. Check and, if necessary, correct the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
6. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
7. Remove the battery and fully charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place [less
than 0 C (30 F) or more than 30
 C (90 F)]. For more information
on storing the battery, see page
6-28.TIPMake any necessary repairs beforestoring the motorcycle.
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SPECIFICATIONS
EAU5091H
Dimensions:Overall length: 2085 mm (82.1 in)
Overall width: 750 mm (29.5 in)
Overall height: 1095 mm (43.1 in)
Seat height:
785 mm (30.9 in)
Wheelbase: 1410 mm (55.5 in)
Ground clearance: 130 mm (5.1 in)
Minimum turning radius:
2400 mm (94.5 in)Weight:Curb weight:174 kg (384 lb)Engine:Engine type:Air cooled 4-stroke, SOHC
Cylinder arrangement: Single cylinder
Displacement:
399 cm
3
Bore  stroke:
87.0  67.2 mm (3.43  2.65 in)
Compression ratio: 8.50 : 1
Starting system:
Kickstarter
Lubrication system: Dry sump
Engine oil:Recommended brand:
YAMALUBE
Type: SAE 10W-30, 10W-40, 10W-50, 15W-40,
20W-40 or 20W-50
Recommended engine oil grade: API service SG type or higher, JASO stan-
dard MA
Engine oil quantity: Without oil filter element replacement:
2.00 L (2.11 US qt, 1.76 Imp.qt)
With oil filter element replacement: 2.10 L (2.22 US qt, 1.85 Imp.qt)Air filter:Air filter element:
Oil-coated paper elementFuel:Recommended fuel:Regular unleaded gasoline (Gasohol (E10)
acceptable) Fuel tank capacity:
12.0 L (3.17 US gal, 2.64 Imp.gal)
Fuel reserve amount:
2.2 L (0.58 US gal, 0.48 Imp.gal)
Fuel injection:Throttle body:ID mark: 2RD1 00Spark plug(s):Manufacturer/model:
NGK/BPR6ES
Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
Clutch type: Wet, multiple-discTransmission:Primary reduction ratio:2.567 (77/30)
Final drive: Chain
Secondary reduction ratio:
2.947 (56/19)
Transmission type: Constant mesh 5-speed
Operation: Left foot operation
Gear ratio:
1st: 2.357 (33/14)
2nd:
1.556 (28/18)
3rd: 1.190 (25/21)
–20 –10 0 1020 30 40 50 C
10 30 50 70 90 110
0 130 F
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
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SPECIFICATIONS
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Rear turn signal light: 12 V, 21.0 W  2
Auxiliary light:
12 V, 4.0 W  1
Meter lighting: 12 V, 1.7 W  4
Neutral indicator light: 12 V, 1.7 W  1
High beam indicator light:
12 V, 1.7 W  1
Turn signal indicator light: 12 V, 1.7 W  1
Fuel level warning light: 12 V, 3.0 W  1
Engine trouble warning light:
12 V, 1.7 W  1Fuses:Main fuse:
30.0 A
Headlight fuse:
15.0 A
Signaling system fuse: 15.0 A
Ignition fuse: 10.0 A
Parking lighting fuse:
7.5 A
Fuel injection system fuse: 7.5 A
Backup fuse: 7.5 A
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CONSUMER INFORMATION
EAU53562
Identification numbersRecord the vehicle identification num-
ber, engine serial number, and the
model label information in the spaces
provided below. These identification
numbers are needed when registering
the vehicle with the authorities in your
area and when ordering spare parts
from a Yamaha dealer.
VEHICLE IDENTIFICATION
NUMBER:
ENGINE SERIAL NUMBER:
MODEL LABEL INFORMATION:
EAU26401
Vehicle identification number
The vehicle identification number is
stamped into the steering head pipe.
Record this number in the space pro-
vided.TIPThe vehicle identification number is
used to identify your motorcycle and
may be used to register your motorcy-
cle with the licensing authority in yourarea.
EAU26441
Engine serial number
The engine serial number is stamped
into the crankcase.
1. Vehicle identification number
1
1. Engine serial number
1
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INDEX
AAir filter element, replacing ...................... 6-12
Auxiliary light bulb, replacing ................... 6-34BBattery ..................................................... 6-28
Brake and clutch levers, checking and lubricating .............................................. 6-25
Brake fluid, changing ............................... 6-21
Brake fluid level, checking ....................... 6-20
Brake lever ................................................ 3-6
Brake lever free play, adjusting ............... 6-17
Brake light switches ................................. 6-19
Brake pads and shoes, checking............. 6-20
Brake pedal ............................................... 3-6
Brake pedal, checking and lubricating ..... 6-25
Brake pedal height and free play, adjusting ................................................ 6-18CCables, checking and lubricating ............. 6-24
Care ........................................................... 7-1
Catalytic converter ..................................... 3-9
Centerstand and sidestand, checking and lubricating ....................................... 6-26
Clutch lever................................................ 3-5
Clutch lever free play, adjusting .............. 6-16DDecompression lever ............................... 3-11
Dimmer switch ........................................... 3-4
Drive chain, cleaning and lubricating ....... 6-23
Drive chain slack ..................................... 6-22EEngine break-in ......................................... 5-3
Engine idling speed, checking ................. 6-13
Engine oil and oil filter element.................. 6-9 Engine serial number ................................ 9-1
Engine stop switch .................................... 3-5
Engine trouble warning light ...................... 3-3
FFront fork, checking................................. 6-27
Fuel ........................................................... 3-7
Fuel cock ................................................. 3-10
Fuel consumption, tips for reducing .......... 5-3
Fuel level warning light .............................. 3-3
Fuel tank breather/overflow hose .............. 3-9
Fuel tank cap............................................. 3-7
Fuses, replacing ...................................... 6-29HHandlebar switches ................................... 3-4
Hazard switch............................................ 3-5
Headlight bulb, replacing......................... 6-31
High beam indicator light ........................... 3-3
Horn switch ............................................... 3-5IIdentification numbers ............................... 9-1
Ignition circuit cut-off system ................... 3-13
Indicator lights and warning lights ............. 3-2KKickstarter ............................................... 3-10MMain switch/steering lock .......................... 3-1
Maintenance and lubricatio
n, periodic....... 6-4
Maintenance, emission control system ..... 6-3
Matte color, caution ................................... 7-1
Model label ................................................ 9-2NNeutral indicator light ................................ 3-2PPanel, removing and installing .................. 6-7 Parking.......................................................5-4
Part locations .............................................2-1
Pass switch ................................................3-4
SSafety information ......................................1-1
Seat ......................................................... 3-11
Shifting .......................................................5-2
Shift pedal ..................................................3-6
Shift pedal, checking................................ 6-19
Shock absorber assemblies, adjusting ....3-12
Sidestand .................................................3-12
Spark plug, checking .................................6-8
Specifications.............................................8-1
Speedometer unit ......................................3-3
Starting the engine.....................................5-1
Starting the engine, trouble........................5-2
Steering, checking ................................... 6-27
Storage ......................................................7-3
Swingarm pivots, lubricating .................... 6-26TTachometer................................................3-4
Tail/brake light bulb, replacing ................. 6-32
Throttle grip and cable, checking and
lubricating ..............................................6-24
Throttle grip free play, checking............... 6-13
Tires ......................................................... 6-14
Tool kit .......................................................6-2
Troubleshooting ....................................... 6-39
Troubleshooting chart ..............................6-40
Turn signal indicator light ...........................3-2
Turn signal light bul b, replacing ............... 6-33
Turn signal switch ......................................3-4VValve clearance ....................................... 6-13
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