light YAMAHA WR 250F 2015 Owners Manual

CONTROL FUNCTIONS................................................................................ 1-21
INDICATOR LIGHTS AND WARNING LIGHTS ....................................... 1-21
ENGINE STOP SWITCH .......................................................................... 1-21
START SWITCH....................................................................................... 1-21
CLUTCH LEVER...................................................................................... 1-21
SHIFT PEDAL .......................................................................................... 1-22
KICKSTARTER LEVER............................................................................ 1-22
THROTTLE GRIP ..................................................................................... 1-22
FRONT BRAKE LEVER ........................................................................... 1-22
REAR BRAKE PEDAL.............................................................................. 1-22
SIDESTAND ............................................................................................. 1-23
STARTER KNOB/IDLE ADJUSTING SCREW ......................................... 1-23
FUEL TANK CAP ..................................................................................... 1-23
MULTI-FUNCTION DISPLAY......................................................................... 1-24
DESCRIPTION ......................................................................................... 1-24
BASIC MODE ........................................................................................... 1-24
CHANGEOVER TO BASIC MODE/RACE MODE.................................... 1-25
RACE MODE ............................................................................................ 1-26
FUNCTION DIAGRAM ............................................................................. 1-30
STARTING AND BREAK-IN.......................................................................... 1-32
FUEL ........................................................................................................ 1-32
HANDLING NOTE .................................................................................... 1-32
AIR FILTER MAINTENANCE ................................................................... 1-32
STARTING A COLD ENGINE .................................................................. 1-32
STARTING A WARM ENGINE ................................................................. 1-33
BREAK-IN PROCEDURES ...................................................................... 1-34
MAINTENANCE AFTER BREAK-IN.............................................................. 1-35
MAJOR MAINTENANCE .......................................................................... 1-35
TORQUE-CHECK POINTS............................................................................ 1-36
MOTORCYCLE CARE AND STORAGE........................................................ 1-38
CARE........................................................................................................ 1-38
STORAGE ................................................................................................ 1-39

DESCRIPTION
1-4
EAS2GB2009
DESCRIPTION
TIP
Designs and specifications of the vehicle are subject to change without notice. Therefore, please
note that the descriptions in this manual may be different from those for the vehicle you have pur-
chased.1. Clutch lever 12. Headlight
2. Multi-function display 13. Radiator
3. Front brake lever 14. Coolant drain bolt
4. Throttle grip 15. Rear brake pedal
5. Start switch 16. Air filter
6. Radiator cap 17. Drive chain
7. Fuel tank cap 18. Shift pedal
8. Engine stop switch 19. Oil level check window
9. Taillight 20. Starter knob/idle screw
10. Fuel tank 21. Front fork
11. Kickstarter lever
32 1
8
10
91112 1376
54
15 14 21 20 19 18 1716

FEATURES
1-6
EAS20170
FEATURES
EAS2GB2014OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the opti-
mum air-fuel ratio in accordance with the engine operating conditions and the atmospheric tempera-
ture. In the conventional carburetor system, the air-fuel ratio of the mixture to be supplied to the
combustion chamber is determined by the amount of intake air and fuel that is measured on the basis
of the jets to be used in the carburetor.
Despite the same amount of intake air, the fuel amount requirement varies with the engine operating
conditions (acceleration, deceleration, and operation under a heavy load). The carburetor that mea-
sures fuel through the use of jets are provided with various auxiliary devices, so that the optimum air
fuel ratio can be obtained to accommodate frequent changes in the operating conditions of the en-
gine. This model has adopted an electronically controlled fuel injection (FI) system, in place of the
conventional carburetor system. This system can obtain the optimum air-fuel ratio required by the
engine at all times by using a microprocessor that regulates the fuel injection amount according to
the engine operating conditions detected by various sensors.
1. Fuel injector
2. Throttle position sensor
3. Intake air pressure sensor
4. Engine trouble warning light
5. Intake air temperature sensor
6. ECU
7. Fuel pump
8. Battery
9. Lean angle sensor
10.Crankshaft position sensor
11.Coolant temperature sensor
12.Ignition coil
13.Speed sensor
748
9 10 116 5 123
12
13

IMPORTANT INFORMATION
1-10
EAS2GB2024GASKETS, OIL SEALS AND O-RINGS
1. When overhauling the engine, replace all
gaskets and O-rings. All gasket surfaces, oil
seal lips, and O-rings must be cleaned so
that there may be no dust on them.
2. During assembly, always apply proper oil to
bearings and proper grease to oil seal lips
before installation.
EAS2GB2025LOCK WASHERS/PLATES AND COTTER
PINS
After removal, replace lock washers/plates “1”
and cotter pins with new ones. After the bolt or
nut has been tightened to specification, firmly
bend the lock tabs along a flat of the bolt or nut.
EAS2GB2026BEARINGS AND OIL SEALS
Install bearings “1” and oil seals “2” with their
manufacturer’s marks or size symbols facing
outward. During installation of an oil seal, make
sure that its main lip faces the oil chamber (the
target to be sealed). Before installation, always
apply a light coat of grease to the oil seal lip.
ECA
NOTICE
Do not spin the bearing with compressed air
because this will damage the bearing sur-
faces.
EAS2GB2027CIRCLIPS
When assembling parts, always use new cir-
clips. During installation of a circlip, make sure
that the edge “2” of the circlip “1” is positioned
opposite to the force “3” that the circlip re-
ceives. Install the circlip with its end aligned
with the center of the spline, without opening
the circlip more than necessary.
1. Oil
2. Lip
3. Spring
4. Grease

SPECIAL TOOLS
1-17
Pocket tester
90890-03112
Analog pocket tester
YU-03112-CThis tool is used to measure
the voltage, current, and re-
sistance of electrical compo-
nents.
Timing light
90890-03141
Timing light
YU-03141This tool is used to measure
the ignition timing.
Pressure gauge
90890-03153
Pressure gauge
YU-03153This tool is used to measure
the fuel pressure.
Fuel pressure adapter
90890-03186
Fuel pressure adapter
YM-03186This tool is used to mount the
pressure gauge.
Test harness S– pressure
sensor (3P)
90890-03207
Test harness S– pressure
sensor (3P)
YU-03207This tool is used to check the
throttle position sensor input
voltage.
Test harness– lean angle
sensor (6P)
90890-03209
Test harness– lean angle
sensor (6P)This tool is used to check the
lean angle sensor output volt-
age.
FI diagnostic tool sub–lead
90890-03212
FI diagnostic tool sub–lead
YU-03212This tool is used to connect
the Yamaha diagnostic tool
to a battery.
Test harness– speed sensor
5TJ (3P)
90890-03228
Test harness– speed sensor
5TJ (3P)
YU-03228This tool is used to check the
speed sensor output voltage.
Yamaha diagnostic tool
90890-03231
Yamaha diagnostic tool (US)
90890-03234This tool is used to check er-
ror codes or carry out self-di-
agnosis. Tool name/Part number How to use Illustration

CONTROL FUNCTIONS
1-21
EAS2GB2031
CONTROL FUNCTIONS
EAS2GB2032INDICATOR LIGHTS AND WARNING
LIGHTS
1. Engine trouble warning light “ ”
2. Fuel level warning light “ ”
Fuel level warning light “ ”
This warning light comes on when the fuel level
drops below approximately 1.6 L (0.42 US gal,
0.35 Imp.gal). When this occurs, refuel as soon
as possible.
The electrical circuit of the warning light can be
checked by pushing the start switch. The warn-
ing light should come on for a few seconds, and
then go off.
If the warning light does not come on initially
when the start switch is pushed, or if the warn-
ing light remains on, have a Yamaha dealer
check the electrical circuit.
Engine trouble warning light “ ”
This warning light comes on or flashes if a prob-
lem is detected in the electrical circuit monitor-
ing the engine. If this occurs, have a Yamaha
dealer check the vehicle.
The electrical circuit of the warning light can be
checked by pushing the start switch. The warn-
ing light should come on for a few seconds, and
then go off.
If the warning light does not come on initially
when the start switch is pushed, or if the warn-
ing light remains on, have a Yamaha dealer
check the electrical circuit.
EAS2GB2033ENGINE STOP SWITCH
The engine stop switch “1” is located on the left
handlebar. Continue pushing the engine stop
switch till the engine comes to a stop.
After the engine stops, the multi-function dis-
play will go off and the power supply to the ECU
(Electronic Control Unit) will be cut off if the en-
gine stop switch is pushed and held.
TIP
The multi-function display will go off after one
minute if the engine stop switch is not pushed.
EAS2GB2034START SWITCH
The start switch “1” is located on the right han-
dlebar. Push this switch to crank the engine
with the starter.
EAS2GB2035CLUTCH LEVER
The clutch lever “1” is located on the left han-
dlebar. The clutch lever disengages or engag-
es the clutch.
Pull the clutch lever toward the handlebar to
disengage the clutch, and release the lever to
engage the clutch.
12

MULTI-FUNCTION DISPLAY
1-25
4. To end the setting, push the “RST” button for
2 seconds or more.
TIP
• In a 30-second absence of button operation,
the setting will come to an end with the indi-
cated time.
• To reset the seconds, push the “SLCT1” but-
ton or “SLCT2” button.
Changing odometer and tripmeter A/B
(TRIP A/B)
1. Push the “SLCT2” button to change the trip-
meter display. The display will change in the
following order:
OdometerTRIP ATRIP BTRIP A
Odometer.
TIP
To reset the digits, select the tripmeter involved
and push the “RST” button for 2 seconds or
more.
EAS2GB2047CHANGEOVER TO BASIC MODE/RACE
MODE
TIP
• Measurement using the timer function can be
made in RACE MODE.
• Indicator will light up as an identifier that
shows RACE MODE has been selected.
• RACE MODE cannot display the functions as
in BASIC MODE.
• Changeover to RACE MODE forces the digits
for tripmeter A (TRIP A) in BASIC MODE to be
reset.
Changeover from BASIC MODE to RACE
MODE
1. Push the “SLCT1” button and “SLCT2” but-
ton for 2 seconds or more at the same time
to change over to RACE MODE.
TIP
Changeover to RACE MODE will put manual
start measurement on standby causing and
to flash. (For manual start, refer to “Putting
measurement on standby” in “RACE MODE”.)

STARTING AND BREAK-IN
1-33
ECA
NOTICE
If the starter motor will not turn when the
start switch is pushed, stop pushing it im-
mediately in order to avoid placing extra
load on the starter motor, and start the en-
gine by using the kickstarter.
TIP
If the engine fails to start, push the engine stop
switch and give the kickstarter 10 to 20 slow
kicks at full throttle in order to clear the engine
of the rich air-fuel mixture retained in it.
4. When the engine starts running, warm this
up one or two minutes at a steady speed (of
3000 to 5000 r/min), and then return the
starter knob/idle screw to its original posi-
tion.
EWA
WARNING
Since exhaust gas contains harmful ingre-
dients, do not start or warm it up at an ill-
ventilated place or a closed narrow place.
5. To stop the engine, push the engine stop
switch “1”.
TIP
Continue pushing the engine stop switch till the
engine comes to a full stop.Starting with the kickstarter
When using the kickstarter to start the engine,
follow the procedures as described below.
1. Fold out the kickstarter lever, push it down
lightly with your foot until resistance is felt.
2. With the throttle fully closed,push the kick-
starter down lightly until the gears engage,
and then push it down smoothly but forceful-
ly.
EWA
WARNING
Do not open the throttle while kicking the
kickstarter lever. Otherwise, the kickstarter
lever may kick back.
TIP
If the engine fails to start, push the engine stop
switch and give the kickstarter 10 to 20 slow
kicks at full throttle in order to clear the engine
of the rich air-fuel mixture retained in it.
EAS2GB2055STARTING A WARM ENGINE
Follow the same procedure as for starting a
cold engine with the exception that the starter is
not required when the engine is warm.
TIP
If it fails to start, fully open the throttle grip and
give 10 to 20 slow kicks to clear the engine of
the rich air-fuel mixture retained in it.

MOTORCYCLE CARE AND STORAGE
1-38
EAS2GB2060
MOTORCYCLE CARE AND STOR-
AGE
EAS2GB2061CARE
While the open design of a motorcycle reveals
the attractiveness of the technology, it also
makes it more vulnerable. Rust and corrosion
can develop even if high-quality components
are used. A rusty exhaust pipe may go unno-
ticed on a car, however, it detracts from the
overall appearance of a motorcycle. Frequent
and proper care does not only comply with the
terms of the warranty, but it will also keep your
motorcycle looking good, extend its life and op-
timize its performance.
Before cleaning
1. Cover the muffler outlet with a plastic bag af-
ter the engine has cooled down.
2. Make sure that all caps and covers as well
as all electrical couplers and connectors, in-
cluding 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
products onto seals, gaskets, sprockets, the
drive chain and wheel axles. Always rinse
the dirt and degreaser off with water.
Cleaning
ECA
NOTICE
• Avoid using strong acidic wheel cleaners,
especially on spoked wheels. If such prod-
ucts are used on hard-to-remove dirt, do
not leave the cleaner on the affected area
any longer than instructed. Also, thor-
oughly rinse the area off with water, imme-
diately dry it, and then apply a corrosion
protection spray.
• Improper cleaning can damage plastic
parts (such as cowlings, panels, wind-
shields, headlight lenses, meter lenses,
etc.) and the mufflers. Use only a soft,
clean cloth or sponge with water to clean
plastic. However, if the plastic parts can-
not be thoroughly cleaned with water, di-
luted mild detergent with water may be
used. Be sure to rinse 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 con-
tact with strong or abrasive cleaning prod-
ucts, solvent or thinner, fuel (gasoline),
rust removers or inhibitors, brake fluid,
antifreeze or electrolyte.
• Do not use high-pressure washers or
steam-jet cleaners since they cause water
seepage and deterioration in the following
areas: seals (of wheel and swingarm bear-
ings, fork and brakes), electric compo-
nents (couplers, connectors, instruments,
switches and lights), breather hoses and
vents.
• For motorcycles equipped with a wind-
shield: Do not use strong cleaners or hard
sponges as they will cause dulling or
scratching. Some cleaning compounds for
plastic may leave scratches on the wind-
shield. Test the product on a small hidden
part of the windshield to make sure that it
does not leave any marks. If the wind-
shield 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 thor-
oughly 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 min-
utes before cleaning.
After riding in the rain, near the sea or on salt-
sprayed roads
Since 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.
TIP
Salt sprayed on roads in the winter may remain
well into spring.
1. Clean the motorcycle with cold water 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.

MOTORCYCLE CARE AND STORAGE
1-39
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 ab-
sorbing cloth.
2. Immediately dry the drive chain and lubri-
cate it to prevent it from rusting.
3. Use a chrome polish to shine chrome, alumi-
num and stainless- steel parts, including the
exhaust system. (Even the thermally in-
duced discoloring of stainless- steel exhaust
systems can be removed through polishing.)
4. To prevent corrosion, it is recommended to
apply a corrosion protection spray on all
metal, including chrome- and nickel-plated,
surfaces.
5. Use spray oil as a universal cleaner to re-
move 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.
EWA
WARNING
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 acetone, and wash the tires with
warm water and a mild detergent. Before
riding at higher speeds, test the motorcy-
cle’s braking performance and cornering
behavior.
ECA
NOTICE
• Apply spray oil and wax sparingly 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 com-
pounds as they will wear away the paint.
TIP
• Consult a Yamaha dealer for advice 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 the lens.
EAS2GB2062STORAGE
Short-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 system are cool before covering the
motorcycle.
ECA
NOTICE
• Storing the motorcycle in a poorly ventilat-
ed room or covering it with a tarp, while it
is still wet, will allow water and humidity to
seep in and cause rust.
• To prevent corrosion, avoid damp cellars,
stables (because of the presence of am-
monia) and areas where strong chemicals
are stored.
Long-term
Before storing your motorcycle for several
months:
1. Follow all the instructions in the “Care” sec-
tion of this chapter.
2. Fill up the fuel tank and add fuel stabilizer (if
available) to prevent the fuel tank from rust-
ing and the fuel from deteriorating.
3. Perform the following steps to protect 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 sparking during the
next step.)
d. Turn the engine over several times with the
starter. (This will coat the cylinder wall with
oil.)