1999 YAMAHA YZF-R7 ignition

2 - 31
SPEC
KPickup coil lead
LStator coil lead
MSpeed sensor lead
NSidestand switch lead
OOil level switch lead
PCoolant reservoir breather hose
QWire harness
RWire harness lead (to fall detection
switch coupler)
SWire harness lead (to fuse box)
TStarter motor leadUNeutral switch lead
VGround lead
WCoolant temperature sensor coupler
XThrottle cable
Route the wire harness in front of the ignition coils.
õBe sure that there is no slack in the tail/brake light lead
and rear turn signal leads below the rear fender panel.
‚Align the portions of the wire harness, ground lead and
starter motor lead marked with white tape with the lead
holder.
CABLE ROUTING

3 - 9
CHK
ADJ

ADJUSTING THE VALVE CLEARANCE
EB303001
ENGINE
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of
the valves.
NOTE:

• Valve clearance adjustment should be
made on a cold engine, at room tem-
perature.
• When the valve clearance is to be mea-
sured or adjusted, the piston must be
at top dead center (TDC) on the com-
pression stroke.
1. Remove:
• bottom cowling
• front cowling
• rear cowling
Refer to “COWLINGS”.
• fuel tank
• air filter case cover
Refer to “FUEL TANK AND AIR FIL-
TER”.
• air filter case
• throttle body assembly
Refer to “ELECTRONIC FUEL INJEC-
TION” IN CHAPTER 6.
• radiator assembly
• thermostat assembly
Refer to “RADIATOR AND THERMO-
STAT” in chapter 5.
2. Disconnect:
• camshaft sensor coupler
• ignition coil couplers
3. Remove:
• ignition coils
• spark plugs
•
cylinder head cover
1

• cylinder head cover gasket
4. Remove:
• pickup coil lead holder
1

• pickup coil rotor cover
2

2
2
1

1

3 - 14
CHK
ADJADJUSTING THE VALVE CLEARANCE/
SYNCHRONIZING THE THROTTLE BODIES
g. Measure the valve clearance again.
h. If the valve clearance is still out of
specification, repeat all of the valve
clearance adjustment steps until the
specified clearance is obtained.
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
8. Install:
• all removed parts
NOTE:
For installation, reverse the removal
procedure. Note the following points.
SYNCHRONIZING THE THROTTLE BODIES
NOTE:
Prior to synchronizing the throttle
bodies, the valve clearance and the
engine idling speed should be properly
adjusted and the ignition timing should
be checked.
1. Stand the motorcycle on a level surface.
NOTE:
Place the motorcycle on a suitable
stand.
2. Remove:
• fuel tank
Refer to “FUEL TANK AND AIR FIL-
TER”.
• bottom cowling
• front cowling
Refer to “COWLINGS”.
3. Remove:
• bolts 1
• copper washers
11

3 - 15
CHK
ADJ
SYNCHRONIZING THE THROTTLE BODIES
4. Install:
• vacuum gauge attachments
(into the bolt holes)
• vacuum gauge
(onto the vacuum gauge attachments)
• engine tachometer
(onto the ignition coil of cylinder #1)
NOTE:
Disconnect the ignition coil coupler and
remove the ignition coil 1 of cylinder
#1, remove the rubber cover 2, and
wrap the engine tachometer lead sev-
eral times around section a of the igni-
tion coil. Then, install the ignition coil
and connect the ignition coil coupler.
5. Install:
• fuel tank
Refer to “FUEL TANK AND AIR FIL-
TER”.
6. Start the engine and let it warm up for
several minutes.
Vacuum gauge
90890-03094
Vacuum gauge attachment
90890-03060
Engine tachometer
90890-06760
1 1
2
2
a
a
7. Measure:
• engine idling speed
Out of specification ® Adjust.
Refer to “ADJUSTING THE ENGINE
IDLING SPEED”.
Engine idling speed
1,000 ~ 1,200 r/min
8. Adjust:
• throttle body synchronization
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. Turn the air screws 1 to adjust the
vacuum pressure of all throttle bodies
to specification.
NOTE:
Do not turn the synchronizing screws.1 11 1

3 - 17
CHK
ADJADJUSTING THE ENGINE IDLING SPEED/
ADJUSTING THE THROTTLE CABLE FREE PLAY
3. Install:
• engine tachometer
(onto the ignition coil of cylinder #1)
NOTE:
Refer to “SYNCHRONIZING THE THROT-
TLE BODIES” for the engine tachometer
installation.
4. Measure:
• engine idling speed
Out of specification ® Adjust.
Engine tachometer
90890-06760
Engine idling speed
1,000 ~ 1,200 r/min
5. Adjust:
• engine idling speed
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. Turn the throttle stop screw 1 in
direction a or b until the specified
engine idling speed is obtained.
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
6. Adjust:
• throttle cable free play
Refer to “ADJUSTING THE THROTTLE
CABLE FREE PLAY”. Direction aEngine idling speed is
increased.
Direction bEngine idling speed is
decreased.
Throttle cable free play
(at the flange of the throttle
grip)
3 ~ 5 mm (0.12 ~ 0.20 in)
a a b b
1
1
EB303031
ADJUSTING THE THROTTLE CABLE FREE
PLAY
NOTE:
Prior to adjusting the throttle cable free
play, the engine idling speed and throt-
tle body synchronization should be
adjusted properly.

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)

3 - 21
CHK
ADJ
MEASURING THE COMPRESSION PRESSURE
3. Remove:
• fuel tank
• air filter case cover
Refer to “FUEL TANK AND AIR FIL-
TER”.
• air filter case
• throttle body assembly
Refer to “ELECTRONIC FUEL INJEC-
TION” in chapter 6.
• ignition coil
4. Remove:
• spark plug
ACHTUNG:CAUTION:
Before removing the spark plugs, use
compressed air to blow away any dirt
accumulated in the spark plug wells to
prevent it from falling into the cylinders.
5. Install:
• compression gauge 1
• adapter 2
Compression gauge
90890-03081
Adapter
90890-04136
1
1

2

2

6. Measure:
• compression pressure
Out of specification ® Refer to steps
(c) and (d).
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. Set the main switch to “ON”.
b. With the throttle wide open, crank the
engine until the reading on the com-
pression gauge stabilizes.
Compression pressure (at sea
level)
Minimum
1,500 kPa
(15.0 kg/cm
2, 213 psi)
Standard
1,600 kPa
(16.0 kg/cm
2, 228 psi)
Maximum
1,700 kPa
(17.0 kg/cm
2, 242 psi)

3 - 61
CHK
ADJ
3. Replace:
• blown fuse
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. Set the main switch to “OFF”.
b. Install a new fuse of the correct
amperage.
c. Set the main switch to “ON” and ver-
ify if the electrical circuit is opera-
tional.
d. If the fuse immediately blows again,
check the electrical circuit.
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
WARNINGWARNING
Never use a fuse with an amperage
other than that specified. Improvising or
using a fuse with the wrong amperage
rating may cause extensive damage to
the electrical system, cause the lighting
and ignition systems to malfunction
and could possibly cause a fire.
4. Install:
• rear cowling
Refer to “COWLINGS”.Item Amperage Q’ty
Main fuse 30 A 1
Headlight
fuse20 A 1
Signaling
system fuse20 A 1
Electronic
fuel injection
system fuse20 A 1
ECU fuse 7.5 A 1
Radiator
fan motor
fuse7.5 A 1
Backup fuse
(odometer)7.5 A 1
Reserve 30 A 1
Reserve 20 A 2
Reserve 7.5 A 2
CHECKING THE FUSES