2006 YAMAHA WR 450F light

5 - 46
CHAS
EC560000
STEERING
Extent of removal:
1 Under bracket removal
2 Bearing removal
Extent of removal Order Part name Q’ty Remarks
STEERING REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over.
Preparation for removal Hold the machine by placing the
suitable stand under the engine.
Headlight
Handlebar Refer to “HANDLEBAR” section.
Hose guide
Front fender
1 Multi-function meter 1
2 Multi-function meter bracket 1
3 Main switch 1 Disconnect the main switch lead.
4 Steering shaft cap 1
5 Steering shaft nut 1
6 Front fork 2 Refer to “FRONT FORK” section.
7 Handle crown 1
8 Ring nut 1 Use special tool.
Refer to “REMOVAL POINTS”.
9 Under bracket 1
10 Bearing race cover 1
21
STEERING

5 - 62
CHASREAR SHOCK ABSORBER
Extent of removal Order Part name Q’ty Remarks
Cylinder head breather hose Disconnect at the air filter case side.
Battery Refer to “BATTERY INSPECTION AND
CHARGING” section in the CHAPTER 3.
Disconnect the starter relay cou-
pler.
Starter motor lead Disconnect at the starter relay side.
1 Locking tie 3
2 Taillight coupler 1
3 Starting circuit cut-off relay cou-
pler1
4 Plastic band 2
5 Clamp (air filter joint) 1 Only loosening.
6Rear frame 1
7 Bolt (rear shock absorber-relay
arm)1 Hold the swingarm.
8 Bolt (rear shock absorber-frame) 1
21

5 - 69
CHAS
8. Install:
•Plastic band 1
•Starting circuit cut-off relay coupler 2
•Taillight coupler 3
•Locking tie 4
REAR SHOCK ABSORBER

6 - 1
–+ELECELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC600000
ELECTRICAL
EC610000
ELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC611000
ELECTRICAL COMPONENTS
1Headlight
2Multi-function display
3“ENGINE STOP” but-
ton
4Clutch switch
5Diode
6Starter relay diode
7TPS (throttle posi-
tion sensor)
8Starter relay
9Fuse
0Starting circuit cut-off
relayATaillight
BNeutral switch
CStarter motor
DAC magneto
ERectifier/regulator
FIgnition coil
GSpark plug
HStart switch
IMain switch
JCDI unit
KSpeed sensor
LBatteryCOLOR CODE
B ...................... Black
Br ..................... Brown
Ch .................... Chocolate
Dg .................... Dark green
Gy .................... Gray
L....................... Blue
O ...................... Orange
R ...................... Red
Sb .................... Sky blue
W ..................... White
EC612000
WIRING DIAGRAM
FGH
I
J
K
L
1 234
56
789
0A
B C
D E
B/L
W
W
R
BR/BBr
R
BR/BBr
R
Y
Y
L/R/BBB
SbL/W
L/YBBB
WY
RY
R
LY
B
YLB/L
B
B
ON
OFF
10A
BB
OFF
START
R-BrL/W
B
BrL/W
BrL/W
L/B
-Y
Y
B
LY
B
L/WSb
B/WBBB
W/R/W
R/
BGyBrL/W
ON
STOP
O
LSbB/L
W RBrB/W
L
/
BGyWR
/B
B O
L/YSbL/R
R W
Y W
Y W
Y
L B
B
B
RRR/B
B Br B
B B B B
L/W
R
R
R R B
R
BrBr
L/W L/
W
Br B
L/B
L/B
L/R

Br
R/B
L/B L
/W
B/W
WW
/RW
RO
L
Y
ELO
B
L
Y
B/LSb*1
Sb
*2B/W
B
B
L/R L/Y L/Y
B
SbSbL/W
B
Gy
SbBB/LYO
L
*2
O B
L YL/W
B/L
*1
D
E
CI
6
H4 5
B3J
K
2FG
7
8L9
1A
*2
*1
W
B
R/W
Ch
Dg
Y
B BrRW
WRB/W
SIGNAL
+
Backup
SLCT1
SLCT2
RST
GND
BrR/WB
B
R/WBr
WRB/W
R B
W
ChDgYB
B/WWRB/WWR
0
R
W
W W
L/WB/L
Y B
RB
B
L
L
*1: For USA
*2: Except for USA
Y ...................... Yellow
B/L ................... Black/Blue
B/W .................. Black/White
L/B ................... Blue/Black
L/R ................... Blue/Red
L/Y ................... Blue/Yellow
L/W .................. Blue/White
R/B................... Red/Black
R/W.................. Red/White

6 - 5
–+ELECIGNITION SYSTEM
MAIN SWITCH INSPECTION
1. Inspect:
•Main switch conduct
Continuous while the main switch is moved to
“OFF” → Replace.
Not continuous while the main switch is moved
to “ON” → Replace.
2. Inspect:
•Main switch indicator light
Use 12 V battery.
Indicator light does not come on → Replace.
3. Inspect:
•Rubber part a
Tears/damage → Replace. Tester (+) lead
→ Red lead
1
Tester (–) lead
→ Brown lead
2
R
1 Br
2 Tester selec-
tor position
ON
Ω
×
×× × 1
OFF
Battery (+) lead
→ Red/Black lead
1
Battery (–) lead
→ Black lead
2
a
EC626002
IGNITION COIL INSPECTION
1. Remove the ignition coil cap.
2. Inspect:
•Primary coil resistance
Out of specification → Replace.
Tester (+) lead
→ Orange lead
1
Tester (–) lead
→ Black lead
2
Primary coil
resistanceTester selector
position
0.08 ~ 0.10
Ω at
20 °C (68 °F)Ω
× 1

–+ELEC
6 - 24
LIGHTING SYSTEM
LIGHTING SYSTEM
INSPECTION STEPS
Refer to the following flow chart when inspecting the ignition system for possible problems.
NOTE:
•Replace the bulb and/or bulb socket.
1) Seat
2) Fuel tank
•Use the following special tool.
Check the bulb and bulb
socket.Replace the bulb and/
or bulb socket.
Check the AC magneto. Lighting coil Replace.
Check the entire lighting
system proper for connec-
tions.Repair or replace.
Check the rectifier/regulator.Out-put
voltageReplace.
Pocket tester:
YU-3112-C/90890-03112
OK
OK
OK
No good
Improperly connectedNo good
No good

6 - 25
–+ELECLIGHTING SYSTEM
AC MAGNETO INSPECTION
1. Inspect:
•Lighting coil resistance
Out of specification → Replace.
RECTIFIER/REGULATOR INSPECTION
1. Connect the battery leads.
2. Start the engine.
3. Turn on the headlight and taillight by turn-
ing on the lights switch.
4. Inspect:
•Out-put voltage
Out of specification → Replace rectifier/
regulator. Tester (+) lead
→ Yellow lead
1
Tester (–) lead
→ Ground
2
Lighting coil
resistanceTester selector
position
0.224 ~ 0.336
Ω
at 20 °C (68 °F)Ω
× 1
Tester (+) lead
→ Yellow lead
1
Tester (–) lead
→ Black lead
2
Out-put voltageTester selector
position
13.0 ~ 14.0 V at
5,000 r/minACV-20
R
BW
Y1
2

–+ELEC
6 - 26
SIGNALING SYSTEM
SIGNALING SYSTEM
INSPECTION STEPS
If the speedometer will not operate, use the following inspection steps.
*1 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
NOTE:
•Remove the following parts before inspection.
1) Headlight
•Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/90890-03112
*1 Check battery. Recharge or replace.
Check each coupler and
wire connection.Repair or replace.
Check multi-function dis-
play.Input voltage Replace wire harness.
Output voltageReplace multi-func-
tion display.
Check speed sensor. Replace.
OK
OK
OK
No good
No good
No good No good
No good