2007 YAMAHA YZF-R1 light

PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6 2. Disconnect the turn signal light
lead coupler.
To install the cowling
1. Connect the turn signal light lead
coupler.2. Fit the projections on the cowling
into the slots and slide it forward.
3. Install the quick fasteners and the
quick fastener screws.
EAU42951
Cowling C
To remove the cowling1. Remove cowling A. (See page
6-6.)
2. Remove the bolts and the quick
fastener screws.3. Slide the cowling backward to un-
hook its projections from the slots,
and then pull the cowling off.
1. Cowling B
2. Quick fastener
1. Turn signal light lead coupler
1. Slot
2. Projection
1. Bolt
2. Quick fastener screw
3. Cowling C
1. Cowling C
2. Slot
3. Projection
U4C8E0E0.book Page 7 Friday, September 15, 2006 3:21 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
EAU19652
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 operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer 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.
Specified spark plug:
NGK/CR9EK
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)
U4C8E0E0.book Page 9 Friday, September 15, 2006 3:21 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
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.
EAU19911
Engine oil and oil filter car-
tridge 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, and then check the oil level
through the check window located
at the bottom-right side of the
crankcase.
NOTE:The engine oil should be between theminimum and maximum level marks.
4. If the engine oil is at or below the
minimum 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 cartridge replace-
ment)
1. Remove cowling C. (See page
6-6.)1. Engine oil level check window
2. Maximum level mark
3. Minimum level mark
4. Engine oil filler cap
U4C8E0E0.book Page 10 Friday, September 15, 2006 3:21 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
68. Install the engine oil drain bolt, and
then tighten it to the specified
torque.
NOTE:Check the washer for damage and re-place it if necessary.
9. Add the specified amount of the
recommended engine oil, and then
install and tighten the oil filler cap.
CAUTION:
ECA11620


In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.


Make sure that no foreign mate-rial enters the crankcase.
10. 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.
11. Turn the engine off, and then
check the oil level and correct it if
necessary.
12. Install the cowling.
1. Torque wrenchTightening torque:
Oil filter cartridge:
17 Nm (1.7 m·kgf, 12 ft·lbf)
Tightening torque:
Engine oil drain bolt:
43 Nm (4.3 m·kgf, 31 ft·lbf)
Recommended engine oil:
See page 8-1.
Oil quantity:
Without oil filter cartridge replace-
ment:
2.90 L (3.07 US qt) (2.55 Imp.qt)
With oil filter cartridge replacement:
3.10 L (3.28 US qt) (2.73 Imp.qt)
U4C8E0E0.book Page 12 Friday, September 15, 2006 3:21 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
6
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.
EAU42990
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 cowl-
ing B. (See page 6-6.)
4. Remove the reservoir cap, add
coolant to the maximum level
mark, and then install the reservoir
cap.
CAUTION:
ECA10471


If coolant is not available, use
distilled water or soft tap water
instead. Do not use hard water
or salt water since it is harmful
to the engine.


If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion.
1. Coolant reservoir
2. Maximum level mark
3. Minimum level mark
1. Coolant reservoir cap
Coolant reservoir capacity (up to the
maximum level mark):
0.25 L (0.26 US qt) (0.22 Imp.qt)
U4C8E0E0.book Page 13 Friday, September 15, 2006 3:21 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6
NOTE:If the specified clutch lever free play
cannot be obtained as describedabove, proceed as follows.
1. Fully turn the adjusting bolt at the
clutch lever in direction (a) to loos-
en the clutch cable.
2. Loosen the locknut at the crank-
case.
3. To increase the clutch lever free
play, turn the adjusting nut in direc-
tion (a). To decrease the clutch le-
ver free play, turn the adjusting nut
in direction (b).
4. Tighten the locknut.
EAU22270
Adjusting the rear brake light
switch The rear brake light switch, which is ac-
tivated by the brake pedal, is properly
adjusted when the brake light comes
on just before braking takes effect. If
necessary, adjust the brake light switch
as follows.
Turn the adjusting nut while holding the
rear brake light switch in place. To
make the brake light come on earlier,
turn the adjusting nut in direction (a). To
make the brake light come on later, turn
the adjusting nut in direction (b).
EAU22390
Checking the front and rear
brake pads The front and rear brake pads must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart.
EAU43062
Front brake pads
The front brake calipers are equipped
with two sets of brake pads.
Each front brake pad is provided with
one or two wear indicator grooves,
which allow you to check the brake pad
wear without having to disassemble the
brake. To check the brake pad wear,
check the wear indicator grooves. If a
brake pad has worn to the point that a
1. Locknut
2. Clutch lever free play adjusting nut (crank-
case)
1. Rear brake light switch
2. Rear brake light switch adjusting nut
1. Brake pad wear indicator groove
U4C8E0E0.book Page 22 Tuesday, December 12, 2006 3:04 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-33
6
To replace a fuse
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 blown fuse, and then
install a new fuse of the specified
amperage.
CAUTION:
ECA10640
Do not use a fuse of a higher amper-
age rating than recommended to
avoid causing extensive damage to
the electrical system and possibly afire.
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
1. Fuse box
1. Turn signal light fuse
2. Headlight fuse
3. Ignition fuse
4. Signaling system fuse
5. ETV (electric throttle valve) fuse
6. Backup fuse (for odometer, clock and immo-
bilizer system)
7. Right radiator fan fuse
8. Left radiator fan fuse
9. Spare fuse
Specified fuses:
Main fuse:
50.0 A
Headlight fuse:
25.0 A
Signaling system fuse:
7.5 A
Ignition fuse:
15.0 A
Radiator fan fuse:
15.0 A × 2
Turn signal light fuse:
7.5 A
Fuel injection system fuse:
15.0 A
Backup fuse:
7.5 A
Electric throttle valve fuse:
7.5 A
U4C8E0E0.book Page 33 Friday, September 15, 2006 3:21 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-34
64. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU42930
Replacing a headlight bulb This model is equipped with quartz bulb
headlights. If a headlight bulb burns
out, replace it as follows.
To replace a high beam headlight
bulb
1. Remove panel C (if replacing the
left headlight bulb) or panel D (if re-
placing the right headlight bulb).
(See page 6-6.)
2. Disconnect the headlight coupler,
and then remove the bulb cover.3. Unhook the headlight bulb holder,
and then remove the defective
bulb.1. High beam headlight bulb
2. Low beam headlight bulb
1. Headlight bulb cover
2. Headlight coupler
1. Headlight bulb holder
U4C8E0E0.book Page 34 Friday, September 15, 2006 3:21 PM