1999 YAMAHA YZF-R7 stop start

2 - 30
SPEC
1Ignition coil
2Throttle position sensor coupler
3Camshaft sensor
4Injector 1 coupler
5Starter motor
6Fuel tank overflow hose
7Fuel pump coupler
8Rectifier/regurator
9Battery
0Turn signal relayAECU
BFuse box
CFall detection switch
DStarter relay
EMain relay
FThrottle stop screw cable
GFuel tank breather hose
HAir filter case breather hose
IIntake air temperature sensor coupler
JInjector 2 sub-lead
CABLE ROUTING

3 - 16
CHK
ADJSYNCHRONIZING THE THROTTLE BODIES/
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
The difference in vacuum pressure
between two throttle bodies should not
exceed 1.33 kPa (10 mm Hg, 0.4 in Hg).
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
9. Measure:
• engine idling speed
Out of specification ® Adjust.
10.Stop the engine and remove the mea-
suring equipment.
11.Adjust:
• throttle cable free play
Refer to “ADJUSTING THE THROTTLE
CABLE FREE PLAY”.
Vacuum pressure at engine
idling speed
15.8 ~ 18.4 kPa (120 ~ 140
mm Hg, 4.72 ~ 5.51 in Hg)
Throttle cable free play
(at the flange of the throttle
grip)
3 ~ 5 mm (0.12 ~ 0.20 in)
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
Prior to adjusting the engine idling
speed, the throttle body synchronization
should be adjusted properly, the air filter
element should be clean, and the engine
should have adequate compression.
1. Start the engine and let it warm up for
several minutes.
2. Remove:
• bottom cowling
• front cowling
Refer to “COWLINGS”.

3 - 20
CHK
ADJCHECKING THE SPARK PLUGS/
MEASURING THE COMPRESSION PRESSURE
5. Check:
• electrodes 1
Damage/wear ® Replace the spark
plug.
• insulator 2
Abnormal color ® Replace the spark
plug.
Normal color is medium-to-light tan.
6. Clean:
• spark plug
(with a spark plug cleaner or wire
brush)
7. Measure:
• spark plug gap a
(with a wire gauge)
Out of specification ® Regap.
8. Install:
• spark plug
NOTE:
Before installing the spark plug, clean
the spark plug and gasket surface.
Spark plug gap
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
T R..13 Nm (1.3 m · kg, 9.4 ft · lb)
EB303060
MEASURING THE COMPRESSION
PRESSURE
The following procedure applies to all of
the cylinders.
NOTE:
Insufficient compression pressure will
result in a loss of performance.
1. Measure:
• valve clearance
Out of specification ® Adjust.
Refer to “ADJUSTING THE VALVE
CLEARANCE”.
2. Start the engine, warm it up for several
minutes, and then stop it.

3 - 23
CHK
ADJ
CHECKING THE ENGINE OIL LEVEL
EB303070
CHECKING THE ENGINE OIL 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. Start the engine, let it idle for several
minutes, and then stop it.
3. Check:
• engine oil level
The engine oil level should be between
the minimum level mark a and maxi-
mum level mark b.
Below the minimum level mark ® Add
the recommended engine oil to the
proper level.
Recommended oil
Refer to the chart for the
engine oil grade which is best
suited for certain atmo-
spheric temperatures.
API standard
SE or higher grade
(Non-Friction modified)
ACHTUNG:CAUTION:
• Engine oil also lubricates the clutch
and the wrong oil types or additives
could cause clutch slippage. There-
fore, do not add any chemical addi-
tives or use engine oils with a grade of
CD c or higher and do not use oils
labeled “ENERGY CONSERVING II” d
or higher.
• Do not allow foreign materials to
enter the crankcase.
4. Start the engine, warm it up for several
minutes, and then turn it off.
5. Check:
• engine oil level
NOTE:
Before checking the engine oil level,
wait a few minutes until the oil has set-
tled.

6 - 5
EFI

ELECTRONIC FUEL INJECTION
Order Job/Part Q’ty Remarks
Removing the throttle body assem-
bly
Remove the parts in the order listed.
1 Fuel hose 1
2 Throttle position sensor coupler 1
3 Cylinder #4 – injector 1 coupler 1
4 Cylinder #3 – injector 1 coupler 1
5 Cylinder #2 – injector 1 coupler 1
6 Cylinder #1 – injector 1 coupler 1
7 Starter cable 1 Disconnect.
8 Throttle cable 2 Disconnect.
9 Throttle stop screw 1 Disconnect.
10 Throttle body assembly 1
11 Left plate 4
12 Right plate 4

8 - 3
–+ELEC

CHECKING THE SWITCHES
EB801010
CHECKING THE SWITCHES
Check each switch for damage or wear, proper connections, and also for continuity between
the terminals. Refer to “CHECKING SWITCH CONTINUITY”.
Damage/wear
® Repair or replace the switch.
Improperly connected ® Properly connect.
Incorrect continuity reading ® Replace the switch.
1Main switch
2Light switch
3Pass switch
4Dimmer switch
5Turn signal switch6Horn switch
7Clutch switch
8Engine stop switch
9Start switch
0Front brake light switchAOil level switch
BRear brake light switch
CFuse
DNeutral switch
ESidestand switch
1L/YL/B
LL/R
R
Br/L
OFF
ONP
L/RLBr/LRL/YL/B
3
4
5
Br/WR/YPLB
Dg Y
G Ch
B/YL/YPASS—
R/YY
67
YG
—BP
(BLUE)
(BLACK)
(BLACK)
R/WBr
R/BB
G/YL/W
B
B
G/YBr
OFF
ChBr/WDg
8R/WR/B
9
0—L/WB
2R/YL•
C
E
(BLUE)
B
B
B D
(BROWN)
Sb
A
W
L/YB/Y
L/YB/Y

8 - 12
–+ELECELECTRIC STARTING SYSTEM
EB803000
ELECTRIC STARTING SYSTEM
CIRCUIT DIAGRAM
B
(BLACK) (DARK GRAY)
(BLACK)B
L
B
L
K
WWW
86
7RR
Br
BBRR
L/W BrL/W
RR
R
B
B
BBB
B
R
WWW(BLACK)
L/W
B
R/B
R/L
G/B
R/L
L/W
B (BLUE)
Gy
Gy/B
B
B(BLUE)
Gy
B
Br
G
L/R
B
Br
G L/R
B
Br/W
Br
B
B
B
B
L/WBr
R/W
G/Y R/W
B/WB/L(GRAY)
(BROWN)
h
Br
YB
BBr
Y (BROWN) (BROWN)
R/YLBr/WP
B(BLUE) (BLUE)(BLACK) (BLACK)
Br
BBR/WR/B
Y
P
ON OFF
R
RL/R
LBr/L
B
R/L
G/W(BLACK)
R/L R/BR/G L/R(GREEN)
(BLACK) (BLACK)(BLACK)(BLACK)
O Gy
B
Br/G
B Br
L/G W/G
Y/G
BYL
B
B
G
Ch Dg
BL/W
L/R
R/BB/Y
L/YSb
R/L R/B
Br/WB1G/W B/L
L/Y
W
B/L
W/B L/YB/L
W/YL/Y
L/Y
Br L
R
Br/LR
Br/L
L/W
L/Y
Br
L/W
L/Y L/B
L L/R
B L/Y
L/R LB B BB
W
WW
W
WW
B
BB
B
B B1
B
BB
B
B
B/YL/Y
B/YL/Y
R/Y
L P
B Br/WDg
ChB/YYG
L/Y
Ch
B/YDg
G
L/YY
B
R
G
B/L
YLWBYPBL
GBB/W
(BLACK)YB
BCh
(BLACK)BDg
B
(GRAY)(BLACK)
(BLACK)
(BLACK) (GRAY)
(GRAY)
(GRAY)
(GRAY) (GRAY)B/W B/L
B/L B/L
W/LP/B Y/L
R
B
PASS
(BLACK)
(BLACK)ChB
(BLACK)DgB
N
B(BLACK)B
(BLACK) (BLACK)
O/G B(BLACK) (BLACK)
L
R/L G/B
M
R/L L/B
N
R/LR/L O/B
OY
Y/R C YG/R C GBr/R C BrGy/R C Gy
R R/LRRRRY
P
RG G(BROWN)
Q
RBr Br
Gy(DARK GRAY)R(GRAY)
R
R/YLg/Y
R/Y Lg/Y R/WB/L
R/Y
R
Y/L
B
L/R
YL/R
Gy/B
Gy
G/WB1
W/Y
W1
L/R B/L
YLW/B
Y/L W/L
P/W P/LR/Y
Br/W R/W
Lg/YL/W B/W
R/L
R/B L/WW G
Lg
L/R L/BSb
B/Y B B/R L/Y
RBR
R/G
4
BL/Y
BB
Br/L
BrBrL
B
B
BR/GB1
B
Y
B
R/WR/B
R/GR/BL/RR/L
Br
G/WR/L
L/YW/BB/L
GyGy/B
R/L
L/R
L/W
B/LL
B
Br/W
Br
Y
LPWP
B2
B2
R PB
(BLACK)
B3
B3W2
Y/G L/GBr/G Br/R
Gy/R
BrBrO/B
G/Y L/B G/B G/R
Y/R
W/G Y/B R/B
O/B
R/L
L/B
GyO
O Lg/R
B
B
B
BB Gy
Gy/G Gy/G Gy/G
O/G O/GO/G
Gy GyGy/G
Br/G
W/G
Y/G
L/G
Br
WW/YB/L
L/Y
Lg/RG/Y W/YL/R
Y/B
L/YBSb
Sb
R/GG/WWYChL
W
BrP
P G Y Ch Dg B
Dg
B
BBBB
B
Dg
ChBr
LR/Y
L/Y B/Y
Br/LBr/LBr/L
BrR/YR/W
Gy/BB3
R/B
G/B
L/B
O/B
Gy/R
Lg/RY/R
G/R
Br/R
R/W
R/Y
Lg/Y
W1
W2
(BLACK)
(BLACK)
(BLACK)
(BLACK) (GRAY)
B
L
B
B/L
Br/W
B/LG/W
S
T
U
V W J
Z
R/G
B L/Y
W/YG/Y W Y/B
Br
G/WLg/R Lg Y
ChDg
L
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(BLACK)
Y
L/W
Y/B
G/Y
Y/L
W/L
P/BR
B3 W/B
B/L
L
Y
P/W
P/L
Br
G/W
B/W
W/Y
Br
B2
|
~
z } {
L/Y
A
A
A
A
AA
AAAA
A C
A
A
A
A A
A
P/LP/W
BB/L BB/L
DL DL
C
W/LP/B
WIRE HARNESS SUB LEAD
B/L B/L
BB
R/L R/L L
R/L R/L L
LRR
LR
R(GRAY)
(GRAY)
WIRE HARNESS SUB LEADY/R
Br/RP/W
G/R Gy/R P/L
WYBr
PG
Gy(BLACK)
(BLACK)
WIRE HARNESS SUB LEAD HEADLIGHT AND METER SUB-WIRE HARNESS
(BLACK)
(BLACK)
WIRE HARNESS
Y W/Y G/WG/W
R/G L G/Y Dg
Br
GY
G L/YW/Y
L/Y BBr
B W Y/B Lg Lg/RCh L/R
L/R
G/Y
R/GDg
L
Lg/R
Lg
W
Y/B ChA
BC
D
D R/L D R/L D R/L D
R
B1
Br/G
W/G
Y/G
L/G
Br
BBB2
GyBSidestand switch
JECU
ZNeutral switch
rClutch switch
}Engine stop switch
~Start switch
£ECU fuse
1Main switch
5Battery
6Main fuse
7Starter relay
8Starter motor
9Diode
0Relay unit
ADiode

8 - 13
–+ELECELECTRIC STARTING SYSTEM
TROUBLESHOOTING
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK
C0NTINUITYOK The starter motor fails to turn.
Check the main and ECU fuses for
continuity.Replace.
Check the condition of the bat-
tery.Recharge or replace.
Check the starter motor. Repair or replace.
Check the relay unit. Replace.
Check the starter relay. Replace.
Check the diodes. Replace.
Check the main switch. Replace.
Check the engine stop switch.Replace the right handlebar
switch.
Check the neutral switch. Replace.
Check the sidestand switch. Replace.
Check the clutch switch. Replace.
Check the start switch.Replace the right handlebar
switch.
Check the entire starting sys-
tem’s wiring.Repair or replace.
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good