Yamaha Yzf R1 2007 Manual

TROUBLESHOOTING
TROUBLESHOOTING.................................................................................. 9-1
GENERAL INFORMATION ..................................................................... 9-1
STARTING FAILURES ............................................................................ 9-1
INCORRECT ENGINE IDLING  SPEED ................................................. 9-1
POOR MEDIUM-AND-HIGH-SPEED  PERFORMANCE ........................ 9-2
FAULTY GEAR SHIFTING...

TROUBLESHOOTING
9-1
EAS28450
TROUBLESHOOTING
EAS28460
GENERAL INFORMATION
NOTE:
The following guide for troubleshooting does 
not cover all the possible causes of trouble. It 
should be helpful, however, as a guide to basic 
troubleshooting. Refer to the relative proce-
dure in this manual for checks, adjustments, 
and replacement of parts.
EAS28470
STARTING FAILURES
Engine
1. Cylinder(s) and cylinder head(s)
 Loose spark plug
 Loose cylinder head
 Damaged cylinder head gasket
 Damaged cylinder...

TROUBLESHOOTING
9-2
Electrical system
1. Battery
 Discharged battery
 Faulty battery
2. Spark plug(s)
 Incorrect spark plug gap
 Incorrect spark plug heat range
 Fouled spark plug
 Worn or damaged electrode
 Worn or damaged insulator
3. Ignition coil(s)
 Broken or shorted primary or secondary 
coils
 Cracked or broken ignition coil
4. Ignition system
 Faulty ECU
 Crankshaft position sensor
EAS28520
POOR MEDIUM-AND-HIGH-SPEED PER-
FORMANCE
Refer to STARTING FAILURES on page 9-1.
Engine
1. Air...

TROUBLESHOOTING
9-3
 Incorrect oil viscosity
 Inferior oil quality
Cooling system
1. Coolant
 Low coolant level
2. Radiator
 Damaged or leaking radiator
 Faulty radiator cap
 Bent or damaged radiator fin
3. Water pump
 Damaged or faulty water pump
 Thermostat
 Thermostat stays closed
 Clogged or damaged oil cooler
 Damaged hose
 Improperly connected hose
 Damaged pipe
 Improperly connected pipe
Fuel system
1. Throttle body(-ies)
 Faulty throttle body(-ies)
 Damaged or loose throttle body...

TROUBLESHOOTING
9-4
7. Wheel(s)
 Incorrect wheel balance
 Deformed cast wheel
 Damaged wheel bearing
 Bent or loose wheel axle
 Excessive wheel runout
8. Frame
 Bent frame
 Damaged steering head pipe
 Improperly installed bearing race
EAS28710
FAULTY LIGHTING OR SIGNALING SYS-
TEM
Headlight does not come on
 Wrong headlight bulb
 Too many electrical accessories
 Hard charging
 Incorrect connection
 Improperly grounded circuit
 Poor contacts (main or light switch)
 Burnt-out headlight bulb...

EAS28740
WIRING DIAGRAM
YZFR1W
1. Main switch
2. AC magneto
3. Rectifier/regulator
4. Main fuse
5. Backup fuse
6. Immobilizer unit
7. ETV fuse
8. Battery
9. Fuel injection system fuse
10. Starter relay
11. Starter motor
12. Starting circuit cut-off relay
13. Neutral switch
14. Sidestand switch
15. Fuel pump
16. Throttle position sensor (for 
throttle valves)
17. Throttle position sensor (for 
throttle cable pulley)
18. O
2 sensor
19. ECU (engine control unit)
20. Ignition coil #1
21. Ignition coil #2
22....

LgR/B
O O C
Gy/R Gy/R C
R/B R/B
B/LC
O/G
O/G C
LP/WB/L
Gy/G
Gy/G C
Br/R Br/R C
W/B W/BCR/B R/B D
G/B G/B D
L/B L/B D
O/B O/B D
R/L
R/LD
P/W P/WD G/W G/WD
R/BGy/G
R/BO/G
R/BO
R/BGy/R
WL/Y
B/LW/B L
B/L
R/B
R/B
R/L
R/L
R/L
B/LG/W
Br/RBrBr/RR/W
G/BR/L
L/B R/L
C
B/L B/L
R/B R/L
LLD
B/L B/LD
C
LLC
R/W R/W R/W
B/G B/G
B/R B/R
W/R W/R R/B
B/W
B
OO
Gy/R
Gy/R
B
R/W
B L W B/LL W
Gy/GB/L
Gy/GGy/G
R
B/LB/L
LL
B/LL
B/LBr/W
B/WB/L
RBW/LSb/W
Gy B
G/YLg/R Lg/R
Y/R Y/R
L P B/LB/L Gy
R/WW/BW WP/WB/GGy B BB/RBr/W Gy/GL LB/L...

C
Y/L
OFF
RUNFREE
PUSH
R
N
L HI
LOOFF
ON ON
OFF
C
WIRE HARNESS
E
WIRE HARNESSREAR TURN SIGNAL
LIGHT LEAD COUPLER
A
WIRE HARNESSWIRE HARNESSSUB-WIRE HARNESS 2SUB-WIRE HARNESS 1 WIRE HARNESS
DB
HEADLIGHT
SUB-WIRE HARNESSHEADLIGHT SUB-WIRE HARNESS6
23
15
79
82
80
81
83
85
78
8786
84
77
7561
6365
64
66
67686970
54
54
53
52
35
36
37
38
39
40
33
32
51
50
49
48
4746
45
44
43
4241
5562
76
74
73
71
72
71
72
8889
7
4
8
9
10
11
56575859
12
14
13
60
15
17
18
16
34
20
24
24
24
24
25
26
1927
28
29
30
31
21
22
23...

Yamaha Motor Canada Ltd.
480 Gordon Baker Road
Toronto, ON M2H 3B4