2005 YAMAHA YZF-R6 check engine light

PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6 To install the panel
1. Fit the tabs on the panel into the
slots and slide it backward.
2. Install the bolts.
EAU19651
Checking the spark plugs The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of each spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally),
and all spark plugs installed in the en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be defective. Do
not attempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.Before installing a spark plug, the spark
plug gap should be measured with a
wire 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.
1. Tab
2. Slot
Specified spark plug:
NGK/CR9EK,CR10EK
1. Spark plug gap
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kgf, 9.0 ft·lbf)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
NOTE:If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci-fied torque as soon as possible.CAUTION:
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.
EAU19931
Engine oil and oil filter
cartridge The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter car-
tridge replaced at the intervals speci-
fied in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.NOTE:
Make sure that the vehicle is positioned
straight up when checking the oil level.
A slight tilt to the side can result in afalse 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.4. Remove the engine oil dipstick and
wipe it clean, insert it back into the
hole (without screwing it in), and
then remove it again to check the
oil level.
1. Dipstick
2. Maximum level mark
3. Minimum level mark
1. Engine oil filler cap
U5SLE2E0.book Page 9 Friday, August 6, 2004 9:48 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6 13. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
NOTE:After the engine is started, the engine
oil level warning light should go off if theoil level is sufficient.CAUTION:
ECA10400
If the oil level warning light flickers
or remains on, immediately turn the
engine off and have a Yamaha dealercheck the vehicle.
14. Turn the engine off, and then
check the oil level and correct it if
necessary.
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.
EAU20112
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.NOTE:

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.
NOTE:The coolant should be between theminimum and maximum level marks.3. If the coolant is at or below the
minimum level mark, remove the
coolant reservoir cover by remov-
ing the bolts, remove the reservoir
cap, and then add coolant to the
maximum level mark.
1. Maximum level mark
2. Minimum level mark
1. Coolant reservoir cover
2. Bolt
U5SLE2E0.book Page 12 Friday, August 6, 2004 9:48 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-37
6
EAU24342
Replacing an auxiliary light
bulb This model is equipped with two auxil-
iary lights. If an auxiliary light bulb burns
out, replace it as follows.
1. Remove the auxiliary light bulb
cover by removing the quick fas-
tener.NOTE:
Remove the quick fastener by pushing
the center pin in with a screwdriver,then pulling the fastener out.
2. Remove the socket (together with
the bulb) by pulling it out.3. Remove the defective bulb by pull-
ing it out.
4. Insert a new bulb into the socket.
5. Install the socket (together with the
bulb) by pushing it in.
6. Install the auxiliary light bulb cover
by installing the quick fastener.
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
1. Auxiliary light bulb cover
2. Quick fastener
1. Auxiliary light bulb
2. Auxiliary light bulb socket
U5SLE2E0.book Page 37 Friday, August 6, 2004 9:48 AM

INDEX
AAir filter element, checking ................... 6-16
Air intake duct ....................................... 6-17
Anti-theft alarm (optional) ..................... 3-12
Auxiliary light bulb, replacing ................ 6-37BBattery .................................................. 6-32
Brake and clutch levers,
checking and lubricating ..................... 6-29
Brake and shift pedals,
checking and lubricating ..................... 6-28
Brake fluid, changing ............................ 6-25
Brake fluid level, checking .................... 6-24
Brake lever ........................................... 3-14
Brake pedal .......................................... 3-15CCables, checking and lubricating .......... 6-27
Care ........................................................ 7-1
Catalytic converter ................................ 3-17
Clutch lever........................................... 3-14
Clutch lever free play, adjusting ........... 6-22
Coolant ................................................. 6-12
Coolant temperature warning light.......... 3-5
Cowlings and panels,
removing and installing......................... 6-6DDimmer switch ...................................... 3-13
Drive chain, lubricating ......................... 6-27
Drive chain slack .................................. 6-25EEngine break-in ...................................... 5-3
Engine idling speed .............................. 6-18
Engine oil and oil filter cartridge ............. 6-9
Engine stop switch................................ 3-13Engine trouble warning light .................... 3-7
FFront and rear brake pads, checking .... 6-23
Front fork, adjusting .............................. 3-20
Front fork, checking...............................6-30
Fuel ....................................................... 3-16
Fuel consumption, tips for reducing ........ 5-3
Fuel level warning light............................ 3-4
Fuel tank breather/overflow hose .......... 3-17
Fuel tank cap......................................... 3-15
Fuses, replacing .................................... 6-33HHandlebar switches ............................... 3-12
Hazard switch........................................ 3-13
Headlight bulb, replacing....................... 6-34
Helmet holders ...................................... 3-19
High beam indicator light......................... 3-4
Horn switch ........................................... 3-13IIdentification numbers ............................. 9-1
Ignition circuit cut-off system ................. 3-25
Immobilizer system .................................3-1
Immobilizer system indicator light ........... 3-7
Indicator and warning lights .................... 3-3KKey identification number ........................ 9-1LLicense plate light bulb, replacing ......... 6-36
Luggage strap holders .......................... 3-24MMain switch/steering lock ........................ 3-2
Model label .............................................. 9-2
Multi-function display...............................3-8
NNeutral indicator light .............................. 3-4OOil level warning light .............................. 3-4PParking.................................................... 5-4
Part locations .......................................... 2-1
Pass switch ........................................... 3-13
Periodic maintenance and
lubrication chart .................................... 6-2
Pre-operation check list .......................... 4-2RRear brake light switch, adjusting ......... 6-23SSafety information ................................... 1-1
Seats..................................................... 3-18
Shifting .................................................... 5-2
Shift pedal ............................................. 3-14
Shift timing indicator light ........................ 3-7
Shock absorber assembly, adjusting .... 3-22
Sidestand .............................................. 3-24
Sidestand, checking and lubricating ..... 6-29
Spark plugs, checking............................. 6-8
Specifications.......................................... 8-1
Starting the engine.................................. 5-1
Start switch ........................................... 3-13
Steering, checking ................................ 6-31
Storage ................................................... 7-3
Storage compartment ........................... 3-19
Supporting the motorcycle .................... 6-37
Swingarm pivots, lubricating ................. 6-30TTachometer............................................. 3-8
Tail/brake light ...................................... 6-35
U5SLE2E0.book Page 1 Friday, August 6, 2004 9:48 AM