warning YAMAHA YZF-R7 1999 User Guide

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MOTORCYCLE CARE AND STORAGE/
CONSUMER INFORMATION
WARNING
When using the starter motor to
crank the engine, remove the spark
plug wires, and ground them to pre-
vent sparking.
4. Remove the drive chain. Thor-
oughly clean the chain with kero-
sene and lubricate it. Reinstall the
chain or store it in a plastic bag
(tied to frame for safekeeping).
5. Lubricate all control cables.
6. Block up the frame to raise both
wheels off the ground.
7. Tie a plastic bag over the exhaust
pipe outlet to prevent moisture
from entering.
8. If strong in a humid or salt-air at-
mosphere, coat all exposed metal
surfaces with a light film of oil. Do
not apply oil to any rubber parts or
the seat cover.9. Remove the battery and charge it.
Store it in a dry place and re-
change it once a month. Do not
store the battery in an excessively
warm or cold place (less than 0°C
(30°F) or more than 30°C (90°F)).
NOTE:
Make any necessary repairs before
storing the motorcycle.
CONSUMER INFORMATION
EAU01040
Identification numbers record
Record the key identification number,
vehicle identification number and mod-
el label information in the spaces pro-
vided for assistance when ordering
spare parts from a Yamaha dealer or
for reference in case the vehicle is sto-
len.
1. KEY IDENTIFICATION
NUMBER:
2. VEHICLE IDENTIFICATION
NUMBER:
3. MODEL LABEL INFORMATION:
1. Key identification numberEAU01041
Key identification number
The key identification number is
stamped on the key tag. Record this
number in the space provided and use
it for reference when obtaining a new
key.
1. Vehicle identification numberEAU01043
Vehicle identification number
The vehicle identification number is
stamped into the steering head pipe.
Record this number in the space pro-
vided.
NOTE:
The vehicle identification number is
used to identify your motorcycle and
may be used to register your motorcy-
cle with the licensing authority in your
state.

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CONSUMER INFORMATION/
TROUBLESHOOTING CHART
1. Model labelEAU01049
Model label
The model label is affixed to the loca-
tion shown in the figure. Record the in-
formation on this label in the space
provided. This information will be need-
ed to order spare parts from your
Yamaha dealer.
1 1
TROUBLESHOOTING
TROUBLESHOOTING CHARTEW000125
WARNING
Never check the fuel system while smoking or in the vicinity of an open flame.
Check if there is fuel
in the fuel tank.
1. FuelEnough fuel.
No fuel.Go to compression check.
Supply fuel.
Use electric starter.
2. CompressionThere is compression.
No compression.Go to ignition check.
Ask a Yamaha dealer to
inspect.
Remove spark
plugs and
check electrodes.
3. IgnitionWet.
Dry.Wipe clean with dry cloth and correct
spark gap or replace spark plugs.
Ask a Yamaha dealer to inspect.
Engine doesn’t start, go to battery
check.
Open throttle half-way and start
the engine.
Use electric starter.
4. BatteryEngine turns over
quickly.
Engine turns over
slowly.Battery good.
Check connections or
recharge.
Engine doesn’t start, ask a Yamaha
dealer to inspect.
Engine doesn’t start, go to compression check.

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TROUBLESHOOTING CHART
5. Engine overheatingEW000070
WARNING
Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be blown out
under pressure, which could cause serious injury. Open the radiator cap as follows. Wait until the engine has
cooled. Remove the radiator cap stopper by removing the screw. Place a thick rag like a towel over the radiator cap
and slowly rotate the cap counterclockwise to the detent. This procedure allows any residual pressure to escape.
When the hissing sound has stopped, press down on the cap while turning counterclockwise and remove it.
NOTE:
If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is changed to the recom-
mended coolant as soon as possible.
Wait until the
engine has cooled.Check the coolant level in the
reservoir tank and/or radiator.
Level is OK.
Level is low, check the
cooling system for leakage.
No
leakage.
Leakage.Ask a Yamaha dealer to inspect
and repair the cooling system.
Add coolant. (See NOTE.)
Restart the engine. If the engine overheats again, ask a
Yamaha dealer to inspect and repair the cooling system.

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CHK
ADJ

REMOVAL
1. Drain:
• fuel
(completely from the fuel tank)
NOTE:

Remove the fuel tank cap and use a
pump to remove the fuel from the fuel
tank.
The fuel tank must be drained to avoid
leakage at the fuel pump outlet.
2. Disconnect:
• fuel pump coupler
• fuel hose
• fuel return hose
WARNINGWARNING

Gasoline is highly flammable.
Avoid spilling fuel on the hot engine.
NOTE:

Wrap the rag over the fuel hose joints to
avoid spilling fuel.
FUEL TANK AND AIR FILTER

3 - 19
CHK
ADJADJUSTING THE THROTTLE CABLE FREE PLAY/
CHECKING THE SPARK PLUGS
Handlebar side
a. Loosen the locknut 4.
b. Turn the adjusting nut 5 in direction
c or d until the specified throttle
cable free play is obtained.
c. Tighten the locknut.
WARNINGWARNING
After adjusting the throttle cable free
play, start the engine and turn the han-
dlebars to the right and to the left to
ensure that this does not cause the
engine idling speed to change.
s s s s s s s s s s s s s s s s s s s s s s s s s s s
Direction cThrottle cable free play
is increased.
Direction dThrottle cable free play
is decreased.
C C
d d
7
7
5
57
7
4
4
EB303040
CHECKING THE SPARK PLUGS
The following procedure applies to all of
the spark plugs.
1. Remove:
• fuel tank
• air filter case cover
Refer to “FUEL TANK AND AIR FIL-
TER”.
• air filter case
Refer to “ELECTRONIC FUEL INJEC-
TION” in chapter 6.
2. Disconnect:
• ignition coil couplers
3. Remove:
• ignition coils
• spark plug
ACHTUNG:CAUTION:
Before removing the spark plugs, blow
away any dirt accumulated in the spark
plug wells with compressed air to pre-
vent it from falling into the cylinders.
4. Check:
• spark plug type
Incorrect ® Change.
Spark plugs
Model (manufacturer)
R0256R-10 (NGK)

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CHK
ADJ
MEASURING THE COMPRESSION PRESSURE
WARNINGWARNING
To prevent sparking, ground all spark
plug leads before cranking the engine.
NOTE:
The difference in compression pressure
between cylinders should not exceed
100 kPa (1 kg/cm2, 14 psi).
c. If the compression pressure is above
the maximum specification, check the
cylinder head, valve surfaces, and
piston crown for carbon deposits.
Carbon deposits ® Eliminate.
d. If the compression pressure is below
the minimum specification, squirt a
few drops of oil into the cylinder and
measure again.
Refer to the following table.
s s s s s s s s s s s s s s s s s s s s s s s s s s s
7. Install:
• spark plug Compression pressure
(with oil applied into the cylinder)
Reading Diagnosis
Higher than with-
out oilPiston wear or
damage ® Repair.
Same as without
oilPiston ring(-s),
valve(-s), cylinder
head gasket or
piston possibly
defective ®
Repair.
T R..13 Nm (1.3 m · kg, 9.4 ft · lb)

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CHK
ADJCHANGING THE ENGINE OIL/
CHECKING THE CLUTCH FLUID LEVEL
15.Install:
• front cowling
• bottom cowling
Refer to “COWLINGS”.
EB303100
CHECKING THE CLUTCH FLUID LEVEL
1. Stand the motorcycle on a level surface.
NOTE:
• Place the motorcycle on a suitable
stand.
• Make sure that the motorcycle is
upright.
2. Check:
• clutch fluid level
Below the minimum level mark a ®
Add the recommended clutch fluid to
the proper level.
WARNINGWARNING
• Use only the designated clutch fluid.
Other fluids may cause the rubber
seals to deteriorate, causing leakage
and poor clutch performance.
• Refill with the same type of fluid. Mix-
ing fluids may result in a harmful
chemical reaction leading to poor
clutch performance.
• When refilling, be careful that water
does not enter the clutch fluid reser-
voir. Water will significantly lower the
boiling point of the fluid and could
cause vapor lock.
ACHTUNG:CAUTION:
Clutch fluid may damage painted sur-
faces and plastic parts. Always clean up
any split fluid immediately.
NOTE:
In order to ensure a correct reading of
the clutch fluid level, make sure that the
top of the clutch fluid reservoir is hori-
zontal.
Recommended clutch fluid
Brake fluid DOT 4aa

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CHK
ADJ
BLEEDING THE HYDRAULIC CLUTCH
SYSTEM
WARNINGWARNING
Bleed the hydraulic clutch system
whenever:
• the clutch system was disassembled,
• a clutch hose was loosened, discon-
nected or replaced,
• the clutch fluid level is very low,
• clutch operation is faulty.
NOTE:
• Be careful not to spill any clutch fluid
or allow the clutch fluid reservoir to
overflow.
• When bleeding the hydraulic clutch
system, make sure that there is always
enough clutch fluid before applying
the clutch. Ignoring this precaution
could allow air to enter the hydraulic
clutch system, considerably lengthen-
ing the bleeding procedure.
• If bleeding is difficult, it may be neces-
sary to let the clutch fluid settle for a
few hours. Repeat the bleeding proce-
dure when the tiny bubbles in the hose
have disappeared.
1. Bleed:
• hydraulic clutch system
t t t t t t t t t t t t t t t t t t t t t t t t t t t
a. Fill the clutch fluid reservoir to the
proper level with the recommended
clutch fluid.
b. Install the clutch fluid reservoir dia-
phragm.
c. Connect a clear plastic hose 1 tightly
to the bleed screw 2.
d. Place the other end of the hose into a
container.
e. Slowly apply the clutch several times.
f. Fully squeeze the clutch lever and
hold it in position.
g. Loosen the bleed screw.
NOTE:
Loosening the bleed screw will release
the pressure and cause the clutch lever
to contact the grip.
h. Tighten the bleed screw and then
release the clutch lever.
i. Repeat steps (e) to (h) until all of the
air bubbles have disappeared from
the clutch fluid in the plastic hose.
2
2
1
1

BLEEDING THE HYDRAULIC CLUTCH SYSTEM

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CHK
ADJBLEEDING THE HYDRAULIC CLUTCH SYSTEM/
CLEANING THE AIR FILTER ELEMENT
j. Tighten the bleed screw to specifica-
tion.
k. Fill the clutch fluid reservoir to the
proper level with the recommended
clutch fluid.
Refer to “CHECKING THE CLUTCH
FLUID LEVEL”.
WARNINGWARNING
After bleeding the hydraulic clutch sys-
tem, check the clutch operation.
s s s s s s s s s s s s s s s s s s s s s s s s s s s
T R..
Bleed screw
6 Nm (0.6 m • kg, 4.3 ft • lb)
EB303130
CLEANING THE AIR FILTER ELEMENT
1. Remove:
• fuel tank
• air filter case cover
• air filter element
Refer to “FUEL TANK AND AIR FIL-
TER”.
2. Clean:
• air filter element
Apply compressed air to the outer sur-
face of the air filter element.
3. Check:
• air filter element
Damage ® Replace.
4. Install:
• air filter element
• air filter case cover
ACHTUNG:CAUTION:
Never operate the engine without the
air filter element installed. Unfiltered air
will cause rapid wear of engine parts
and may damage the engine. Operating
the engine without the air filter element
will also affect the electronic fuel injec-
tion, leading to poor engine perfor-
mance and possible overheating.
5. Install:
• fuel tank
Refer to “FUEL TANK AND AIR FIL-
TER”.

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CHK
ADJ
CHANGING THE COOLANT
EB303240
CHANGING THE COOLANT
1. Remove:
• bottom cowling
• front cowling
Refer to “COWLINGS”.
2. Remove:
• coolant reservoir bolts 1
• coolant reservoir cap 2
NOTE:
When draining the coolant from the
coolant reservoir, be sure to tilt the res-
ervoir so that coolant cannot flow
through the coolant reservoir breather
hose 3.
3. Drain:
• coolant
(from the coolant reservoir)
4. Install:
• coolant reservoir bolts
2
2

1

1

5. Remove:
• radiator cap 1
WARNINGWARNING
A hot radiator is under pressure. There-
fore, do not remove the radiator cap
when the engine is hot. Scalding hot
fluid and steam may be blown out,
which could cause serious injury. When
the engine has cooled, open the radiator
cap as follows:
Place a thick rag or a towel over the
radiator cap and slowly turn the radia-
tor cap counterclockwise toward the
detent to allow any residual pressure to
escape. When the hissing sound has
stopped, turn the radiator cap counter-
clockwise while pressing down on it
and then remove it.
1
1

6. Remove:
• coolant drain bolt 1
(along with the copper washer)
7. Drain:
• coolant