check engine light YAMAHA WR 250R 2011 User Guide

PERIODIC MAINTENANCE AND ADJUSTMENT
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EAU48340
Checking the spark plug The spark plug is an important engine
component, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode, it
should be removed and checked in ac-
cordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of the spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally). If
the spark plug shows a distinctly differ-
ent color, the engine could be operating
improperly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If the spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced.
Before installing a spark plug, the spark
plug gap should be measured with awire thickness gauge and, if necessary,
adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and then
wipe off any grime from the spark plug
threads.
TIPIf a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turnpast finger tight. However, the spark
plug should be tightened to the speci-
fied torque as soon as possible.NOTICE
ECA10840
Do not use any tools to remove or in-
stall the spark plug cap, otherwise
the ignition coil coupler may get
damaged. The spark plug cap may
be difficult to remove because the
rubber seal on the end of the cap fits
tightly. To remove the spark plug
cap, simply twist it back and forth
while pulling it out; to install it, twistit back and forth while pushing it in.
Specified spark plug:
NGK/CR9EK
1. Spark plug gapSpark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)11
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PERIODIC MAINTENANCE AND ADJUSTMENT
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EAU45143
Engine oil and oil filter
element The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter ele-
ment replaced at the intervals specified
in the periodic maintenance and lubri-
cation chart.
To check the engine oil level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Wait a few minutes until the oil set-
tles, and then check the oil level
through the check window located
at the bottom-right side of the
crankcase.TIPThe engine oil should be between theminimum and maximum level marks.4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
To change the engine oil (with or
without oil filter element replace-
ment)
1. Place the vehicle on a level sur-
face.
2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Place an oil pan under the engineto collect the used oil.
4. Remove the engine oil filler cap,
the engine oil drain bolt and its
gasket to drain the oil from the
crankcase.
TIPSkip steps 5–8 if the oil filter element isnot being replaced.
5. Remove the oil filter element cover
by removing the bolts.
1. Engine oil filler cap
2. Maximum level mark
3. Minimum level mark
4. Engine oil level check window
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2
3
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1. Engine oil drain bolt
2. Gasket
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PERIODIC MAINTENANCE AND ADJUSTMENT
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9it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
12. Turn the engine off, wait a few min-
utes until the oil settles, and then
check the oil level and correct it if
necessary.
NOTICE
ECA11231
After changing the engine oil, make
sure to check the oil pressure as de-
scribed below.
Loosen the bleed bolt.

Start the engine and keep it
idling until oil flows out. If no oil
comes out after one minute,
turn the engine off immediately
so it will not seize. If this occurs,
have a Yamaha dealer repair the
vehicle.

After checking the oil pressure,
tighten the bleed bolt to thespecified torque.
EAU20070
Coolant The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU20254
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.TIP
The coolant level must be checked
on a cold engine since the level
varies with engine temperature.

Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to theside can result in a false reading.
2. Check the coolant level in the cool-
ant reservoir.
TIPThe coolant should be between theminimum and maximum level marks.
1. Bleed boltTightening torque:
Bleed bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
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EAU45222
Replacing an auxiliary light
bulb If the auxiliary light bulb burns out, re-
place it as follows.
1. Remove the headlight unit. (See
page 6-35.)
2. Remove the auxiliary light socket
(together with the bulb) by pulling it
out.
3. Remove the burnt-out bulb by pull-
ing it out.
4. Insert a new bulb into the socket.
5. Install the auxiliary light socket (to-
gether with the bulb) by pushing it
in.
6. Install the headlight unit.
EAU24350
Supporting the motorcycle Since this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other maintenance
requiring the motorcycle to stand up-
right. Check that the motorcycle is in a
stable and level position before starting
any maintenance. A strong wooden
box can be placed under the engine for
added stability.
To service the front wheel
1. Stabilize the rear of the motorcycle
by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack un-
der the frame in front of the rear
wheel.
2. Raise the front wheel off the
ground by using a motorcycle
stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor-
cycle stand is not available, by placing
a jack either under each side of theframe in front of the rear wheel or under
each side of the swingarm.
1. Auxiliary light bulb socket
1
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INDEX
AAir filter element and check hose,
cleaning ................................................. 6-17
Auxiliary light bulb, replacing ................... 6-38BBattery ..................................................... 6-32
Brake and clutch levers, checking and
lubricating .............................................. 6-29
Brake fluid, changing ............................... 6-26
Brake fluid level, checking ....................... 6-25
Brake lever .............................................. 3-10
Brake lever free play, adjusting ............... 6-23
Brake light switches ................................. 6-24
Brake pedal ............................................. 3-10
Brake pedal, checking and lubricating ..... 6-30CCables, checking and lubricating ............. 6-29
Care ........................................................... 7-1
Catalytic converter ................................... 3-13
Clutch lever................................................ 3-9
Clutch lever free play, adjusting .............. 6-22
Coolant .................................................... 6-14
Coolant temperature warning light............. 3-2DDimmer switch ........................................... 3-9
Drive chain, cleaning and lubricating ....... 6-28
Drive chain slack ..................................... 6-27EEngine break-in ......................................... 5-3
Engine idling speed ................................. 6-19
Engine oil and oil filter element................ 6-12
Engine stop switch..................................... 3-9
Engine trouble warning light ...................... 3-3
EXUP system .......................................... 3-18
FFront and rear brake pads, checking ...... 6-25
Front fork, adjusting ................................ 3-14
Front fork, bleeding ................................. 3-16
Front fork, checking................................. 6-31
Fuel ......................................................... 3-11
Fuel consumption, tips for reducing .......... 5-3
Fuel level warning light .............................. 3-2
Fuel tank cap........................................... 3-11
Fuses, replacing ...................................... 6-34HHandlebar switches ................................... 3-8
Headlight bulb, replacing......................... 6-35
Helmet holder .......................................... 3-14
High beam indicator light ........................... 3-2
Horn switch ............................................... 3-9IIdentification numbers ............................... 9-1
Ignition circuit cut-off system ................... 3-19
Indicator lights and warning lights ............. 3-2LLicense plate light bulb, replacing ........... 6-37MMain switch/steering lock .......................... 3-1
Maintenance and lubrication, periodic....... 6-4
Maintenance, emission control system ..... 6-3
Matte color, caution ................................... 7-1
Model label ................................................ 9-1
Multi-function display................................. 3-3NNeutral indicator light ................................ 3-2PPanels, removing and installing ................ 6-8
Parking ...................................................... 5-4Part locations .............................................2-1
SSafety information ......................................1-1
Seat ......................................................... 3-13
Shifting .......................................................5-2
Shift pedal ................................................3-10
Shift pedal, checking................................ 6-24
Shock absorber assembly, adjusting .......3-17
Sidestand .................................................3-19
Sidestand, checking and lubricating ........6-30
Spark plug, checking ............................... 6-11
Specifications.............................................8-1
Starting the engine.....................................5-1
Start switch ................................................3-9
Steering, checking ................................... 6-32
Storage ......................................................7-3
Supporting the motorcycle .......................6-38
Swingarm pivots, lubricating .................... 6-31TTail/brake light ......................................... 6-36
Throttle grip and cable, checking and
lubricating ..............................................6-29
Throttle grip free play, checking............... 6-19
Tires ......................................................... 6-20
Tool kit .......................................................6-2
Troubleshooting ....................................... 6-41
Troubleshooting charts ............................6-43
Turn signal indicator light ...........................3-2
Turn signal light bulb, replacing ............... 6-36
Turn signal switch ......................................3-9VValve clearance ....................................... 6-20
Vehicle identification number .....................9-1
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