ignition YAMAHA SR400 2016 Owners Manual

Table of contents
Safety information............................ 1-1
Description ........................................ 2-1
Left view .......................................... 2-1
Right view ........................................ 2-2
Controls and instruments ................ 2-3
Instrument and control functions ... 3-1
Main switch/steering lock ................ 3-1
Indicator lights and warning lights ... 3-2
Speedometer unit ..... ....................... 3-3
Tachometer ..................................... 3-4
Handlebar switches ......................... 3-4
Clutch lever ..................................... 3-6
Shift pedal ....................................... 3-6
Brake lever ...................................... 3-7
Brake pedal .............. ....................... 3-7
Fuel tank cap ................................... 3-8
Fuel ................................................. 3-9
Fuel tank breather/overflow hose ........................................... 3-10
Catalytic converter......................... 3-11
Fuel cock ....................................... 3-11
Kickstarter .... ............................. .... 3-12
Decompression lever..................... 3-12
Seat ............................................... 3-13
Adjusting the shock absorber assemblies ................................. 3-13
Sidestand ...................................... 3-14
Ignition circuit cut- off system ......... 3-15
For your safety – pre-operation
checks ................................................ 4-1
Operation and im portant riding
points ................................................. 5-1
Starting the engine .......................... 5-2
Starting trouble ................................ 5-3
Shifting ............................................ 5-3
Tips for reducing fuel consumption................................. 5-5
Engine break-in ............................... 5-5
Parking ............................................ 5-6 Periodic maintenance and
adjustment
........................................ 6-1
Owner’s tool kit ............................... 6-2
Periodic maintenance chart for the
emission control system .............. 6-3
General maintenance and lubrication chart ........................... 6-4
Removing and installing the panel ............................................ 6-7
Checking the spark plug ................. 6-8
Engine oil and oil filter element ....... 6-9
Replacing the air filter element ..... 6-13
Checking the engine idling
speed ......................................... 6-14
Checking the throttle grip free play ............................................ 6-14
Valve clearance ............................ 6-15
Tires .............................................. 6-15
Spoke wheels........... ..................... 6-17
Adjusting the clutch lever free play ............................................ 6-18
Adjusting the brake lever free play ............................................ 6-19
Adjusting the brake pedal height
and free play .............................. 6-20
Checking the shift pedal................ 6-21
Brake light switches ...................... 6-22
Checking the front brake pads and rear brake shoes ................ 6-22
Checking the brake fluid level ....... 6-23
Changing the brake fluid .............. 6-24
Drive chain slack ........................... 6-25
Cleaning and lubricating the drive
chain .......................................... 6-26
Checking and lubricating the cables ........................................ 6-27
Checking and lubricating the throttle grip and ca ble ................ 6-27
Checking and lubricating the
brake and clutch levers.............. 6-28
Checking and lubricating the brake pedal ................................ 6-28
Checking and lubricating the centerstand and sidestand ........ 6-29
Lubricating the swingarm pivots.... 6-29
Checking the front fork .................. 6-30
2RD-28199-E1.book 1 ページ ２０１５年９月３日　木曜日　午後３時４２分

3-1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Instrument and control functions
EAU10462
Main switch/steering lock
The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
positions are described below.
EAU45111ON
All electrical circuits are supplied with
power, and the meter lighting and tail-
light come on, and the engine can be
started. The key cannot be removed.
TIP
The headlight comes on automatically
when the engine is started and stays on
until the key is turned to “OFF”, even if
the engine stalls.
EAU10662OFF
All electrical systems are off. The key
can be removed.
WARNING
EWA10062
Never turn the key to “OFF” or
“LOCK” while the vehicle is moving.
Otherwise the electrical systems will
be switched off, which may result in
loss of control or an accident.
EAU10687LOCK
The steering is locked and all electrical
systems are off. The key can be re-
moved.
To lock the steering
1. Turn the handlebars all the way to the left.
2. With the key in the “OFF” position, push the key in and turn it to
“LOCK”.
3. Remove the key.
TIP
If the steering will not lock, try turning
the handlebars back to the right slightly.
To unlock the steering
P
ON
OFF
LOCK
1. Push.
2. Turn.
1. Push.
2. Turn.
12
12
2RD-28199-E1.book 1 ページ ２０１５年９月３日　木曜日　午後３時４２分

Instrument and control functions
3-9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EAU13222
Fuel
Make sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline and gasoline vapors are
extremely flammable. To avoid fires
and explosions and to reduce the
risk of injury when refueling, follow
these instructions. 1. Before refueling, turn off the en- gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vicin-
ity of sparks, open flames, or other
sources of ignition such as the pilot
lights of water heaters and clothes
dryers.
2. Do not overfill the fuel tank. When refueling, be sure to insert the
pump nozzle into the fuel tank filler
hole. Stop filling when the fuel
reaches the bottom of the filler
tube. Because fuel expands when
it heats up, heat from the engine or
the sun can cause fuel to spill out
of the fuel tank.
3. Wipe up any spilled fuel immedi- ately. NOTICE: Immediately wipe off spilled fuel with a clean, dry,
soft cloth, since fuel may deteri-
orate painted surfaces or plastic
parts.
[ECA10072]
4. Be sure to securely close the fuel
tank cap.
WARNING
EWA15152
Gasoline is poisonous and can
cause injury or death. Handle gaso-
line with care. Never siphon gaso-
line by mouth. If you should swallow
some gasoline or inhale a lot of gas-
oline vapor, or get some gasoline in
your eyes, see your doctor immedi-
ately. If gasoline spills on your skin,
wash with soap and water. If gaso-
line spills on your clothing, change
your clothes.
EAU57691
NOTICE
ECA11401
Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
such as the valves and piston rings,
as well as to the exhaust system.
Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
95 or higher. If knocking (or pinging) oc-
1. Maximum fuel level
2. Fuel tank filler tube
1 2
Recommended fuel:
Regular unleaded gasoline (Gasohol
[E10] acceptable)
Fuel tank capacity:
12 L (3.2 US gal, 2.6 Imp.gal)
Fuel reserve amount (when the fuel
level warning light comes on): 2.2 L (0.58 US gal, 0.48 Imp.gal)
2RD-28199-E1.book 9 ページ ２０１５年９月３日　木曜日　午後３時４２分

Instrument and control functions
3-14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EAU15306
Sidestand
The sidestand is located on the left side
of the frame. Raise the sidestand or
lower it with your foot while holding the
vehicle upright.
TIP
The built-in sidestand switch is part of
the ignition circuit cut-off system, which
cuts the ignition in certain situations.
(See the following section for an expla-
nation of the ignition circuit cut-off sys-
tem.)
WARNING
EWA10242
The vehicle must not be ridden with
the sidestand down, or if the sides-
tand cannot be properly moved up
(or does not stay up), otherwise the
sidestand could contact the ground
and distract the operator, resulting
in a possible loss of control.
Yamaha’s ignition circuit cut-off
system has been designed to assist
the operator in fulfilling the respon-
sibility of raising the sidestand be-
fore starting off. Therefore, check
this system regularly and have a
Yamaha dealer repair it if it does not
function properly.
Spring preload setting: Minimum (soft):
1
Standard: 1
Maximum (hard): 5
2RD-28199-E1.book 14 ページ ２０１５年９月３日　木曜日　午後３時４２分

Instrument and control functions
3-15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EAU66820
Ignition circuit cut-off system
The ignition circuit cut-off system (com-
prising the sidestand switch, clutch
switch and neutral switch) has the fol-
lowing functions.
It prevents starting when the trans-
mission is in gear and the sides-
tand is up, but the clutch lever is
not pulled.
It prevents starting when the trans-
mission is in gear and the clutch le-
ver is pulled, but the sidestand is
still down.
It cuts the running engine when the
transmission is in gear and the sid-
estand is moved down.
Periodically check the operation of the
ignition circuit cut-of f system according
to the following procedure.
2RD-28199-E1.book 15 ページ ２０１５年９月３日　木曜日　午後３時４２分

For your safety – pre-operation checks
4-2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Drive chain Check chain slack.
Adjust if necessary.
Check chain condition.
Lubricate if necessary. 6-25,
6-26
Wheels and tires Check for damage.
Check tire condition and tread depth.
Check air pressure.
Correct if necessary. 6-15,
6-17
Shift pedal Make sure that operation is smooth.
Correct if necessary. 6-21
Brake pedal Make sure that operation is smooth.
Lubricate pedal pivoting point if necessary. 6-28
Brake and clutch
levers Make sure that operation is smooth.
Lubricate lever pivoting points if necessary.
6-28
Centerstand, sidestand Make sure that operation is smooth.
Lubricate pivots if necessary. 6-29
Chassis fasteners Make sure that all nuts, bol
ts and screws are properly
tightened.
Tighten if necessary. —
Instruments, lights,
signals and switches Check operation.
Correct if necessary.
—
Sidestand switch Check operation of ignition circuit cut-off system.
If system is not working correctly, have Yamaha dealer
check vehicle. 3-14
ITEM CHECKS PAGE
2RD-28199-E1.book 2 ページ ２０１５年９月３日　木曜日　午後３時４２分

Operation and important riding points
5-2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EAU59532
Starting the engine
In order for the ignition circuit cut-off
system (page 3-15) 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.
1. Turn the fuel cock lever to “ON”.
2. 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
ECA23270
If a warning light does not come on
initially when the key is turned to
“ON”, or if a warning light remains
on, see page 3-2 for the correspond-
ing warning light circuit check.
3. Shift the transmission into the neu- tral position. The neutral indicator
light should come on. If not, ask a
Yamaha dealer to check the elec-
trical circuit.
4. Completely close the throttle and apply the decompression lever.
5. Slowly push the kickstarter lever down until the starting mark shows
on the kick indicator. 6. Release the decompression lever,
release the kickstarter lever, and
then push the kickstarter lever
down forcefully to start the engine.
NOTICE
ECA11043
For maximum engine life, never ac-
celerate hard when the engine is
cold!
1. Starting mark
2. Kick indicator
21
2RD-28199-E1.book 2 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-34
1
2
3
4
5
6
7
8
9
10
11
12
13
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
6-42
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EAU25852
Troubleshooting
Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
WARNING
EWA15142
When checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the ar-
ea, including pilot lights from water
heaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or
property damage.
2RD-28199-E1.book 42 ページ ２０１５年９月３日　木曜日　午後３時４２分

Periodic maintenance and adjustment
6-43
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EAU67930
Troubleshooting chart
1. FuelThere is enough fuel.
There is no fuel.Supply fuel.
Check the battery.
The turn signal
flashes brightly.
The turn signal does
not flash or is weak.
The engine does not
start.
Check the battery.
Wipe off with a dry
cloth and correct the
spark plug gap, or
replace the spark
plug.
Check the battery
lead connections,
and have a Yamaha
dealer charge the
battery if necessary.
Operate the
kickstarter.
If the engine does
not start, check the
ignition.
2. BatteryThe battery is good.
3. IgnitionWet
Dry
There is compression.
There is no
compression.
Operate the
kickstarter.
The engine does not start.
Have a Yamaha dealer check the vehicle.
Have a Yamaha dealer check the vehicle.
The engine does not
start.
Check the
compression.Have a Yamaha
dealer check the
vehicle.
Remove the spark
plug and check
the electrodes.
With the key in the on
position, operate the
turn signal switch.
Operate the
kickstarter.
Check the fuel level
in the fuel tank.
4. Compression
2RD-28199-E1.book 43 ページ ２０１５年９月３日　木曜日　午後３時４２分