2007 YAMAHA WR 450F relay

5 - 55
CHASSWINGARM
Connecting rod
1. Inspect:
•Bearing 1
•Collar 2
Free play exists/unsmooth revolution/rust
→ Replace bearing and collar as a set.
2. Inspect:
•Oil seal 3
Damage → Replace.
EC575000
ASSEMBLY AND INSTALLATION
Bearing and oil seal
1. Install:
•Bearing 1
•Oil seal 2
To swingarm.
NOTE:
•Apply the molybdenum disulfide grease on
the bearing when installing.
•Install the bearing by pressing it on the side
having the manufacture’s marks or numbers.
•First install the outer and then the inner bear-
ings to a specified depth from inside.
Installed depth of bearings:
Outer
a: Zero mm (Zero in)
Inner
b: 6.5 mm (0.26 in)
2. Install:
•Bearing 1
•Plain washer 2
•Oil seal 3
To relay arm.
NOTE:
•Apply the molybdenum disulfide grease on
the bearing when installing.
•Install the bearing by pressing it on the side
having the manufacture’s marks or numbers.
•Apply the molybdenum disulfide grease on
the plain washer.
Installed depth of bearings
a:
Zero mm (Zero in)

5 - 56
CHASSWINGARM
3. Install:
•Bearing 1
•Oil seal 2
To connecting rod.
NOTE:
•Apply the molybdenum disulfide grease on
the bearing when installing.
•Install the bearing by pressing it on the side
having the manufacture’s marks or numbers.
Installed depth of bearings
a:
Zero mm (Zero in)
Swingarm
1. Install:
•Bush 1
•Thrust bearing 2
•Oil seal 3
•Collar 4
To swingarm 5.
NOTE:
Apply the molybdenum disulfide grease on the
bushes, thrust bearings, oil seal lips and con-
tact surfaces of the collar and thrust bearing.
2. Install:
•Collar 1
•Washer 2
To relay arm 3.
NOTE:
Apply the molybdenum disulfide grease on the
collars and oil seal lips.

5 - 57
CHASSWINGARM
3. Install:
•Collar 1
To connecting rod 2.
NOTE:
Apply the molybdenum disulfide grease on the
collar and oil seal lips.
4. Install:
•Connecting rod 1
•Bolt (connecting rod) 2
•Plain washer 3
•Nut (connecting rod) 4
To relay arm 5.
NOTE:
Apply the molybdenum disulfide grease on the
bolt.
T R..80 Nm (8.0 m · kg, 58 ft · lb)
5. Install:
•Relay arm 1
•Bolt (relay arm) 2
•Plain washer 3
•Nut (relay arm) 4
To swingarm.
NOTE:
•Apply the molybdenum disulfide grease on
the bolt circumference and threaded portion.
•Do not tighten the nut yet.

5 - 58
CHASSWINGARM
6. Install:
•Swingarm 1
•Pivot shaft 2
NOTE:
•Apply the molybdenum disulfide grease on
the pivot shaft.
•Insert the pivot shaft from right side.
T R..85 Nm (8.5 m · kg, 61 ft · lb)
7. Check:
•Swingarm side play a
Free play exists → Replace thrust bear-
ing.
•Swingarm up and down movement b
Unsmooth movement/binding/rough
spots → Grease or replace bearings,
bushes and collars.
8. Install:
•Bolt (connecting rod) 1
•Plain washer 2
•Nut (connecting rod) 3
NOTE:
•Apply the molybdenum disulfide grease on
the bolt.
•Do not tighten the nut yet.
9. Install:
•Bolt (rear shock absorber-relay arm) 1
•Nut (rear shock absorber-relay arm) 2
NOTE:
Apply the molybdenum disulfide grease on the
bolt.
T R..53 Nm (5.3 m · kg, 38 ft · lb)
10. Tighten:
•Nut (connecting rod) 1
T R..80 Nm (8.0 m · kg, 58 ft · lb)

5 - 59
CHAS
11. Tighten:
•Nut (relay arm) 1
T R..70 Nm (7.0 m · kg, 50 ft · lb)
12. Install:
•Cap 1
NOTE:
Install the cap (right) with its mark a facing
forward.
13. Install:
•Bolt [chain tensioner (lower)] 1
•Plain washer 2
•Collar 3
•Chain tensioner 4
•Nut [chain tensioner (lower)] 5
T R..16 Nm (1.6 m · kg, 11 ft · lb)
14. Install:
•Chain support 1
•Support cover 2
•Bolt {chain support [ = 50 mm (1.97 in)]}
3
•Nut (chain support) 4
•Bolt {support cover [ = 10 mm (0.39 in)]}
5
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
SWINGARM

5 - 61
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 4
2 Taillight coupler 1
3 CDI unit coupler 3
4 Plastic band 1
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 - 67
CHASREAR SHOCK ABSORBER
2. Install:
•Bush 1
•Collar 2
•Dust seal 3
NOTE:
•Apply the molybdenum disulfide grease on
the bearing and dust seal lips.
•Install the dust seals with their lips facing out-
ward.
3. Install:
•Rear shock absorber
4. Install:
•Bolt (rear shock absorber-frame) 1
•Washer 2
•Nut (rear shock absorber-frame) 3
NOTE:
Apply the molybdenum disulfide grease on the
bolt.
5. Install:
•Bolt (rear shock absorber-relay arm) 1
•Nut (rear shock absorber-relay arm) 2
NOTE:
Apply the molybdenum disulfide grease on the
bolt.
1 2
3
M
T R..56 Nm (5.6 m · kg, 40 ft · lb)
T R..53 Nm (5.3 m · kg, 38 ft · lb)
6. Install:
•Rear frame 1
•Bolt [rear frame (upper)] 2
•Bolt [rear frame (lower)] 3
T R..38 Nm (3.8 m · kg, 27 ft · lb)
T R..32 Nm (3.2 m · kg, 23 ft · lb)
7. Tighten:
•Screw (air filter joint) 1
T R..3 Nm (0.3 m · kg, 2.2 ft · lb)

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
relayACDI unit
BTaillight
CNeutral switch
DStarter motor
EAC magneto
FRectifier/regulator
GIgnition coil
HSpark plug
IStart switch
JMain switch
KSpeed sensor
LBatteryCOLOR CODE
B ...................... Black
Br ..................... Brown
Ch .................... Chocolate
Dg .................... Dark green
G ...................... Green
Gy .................... Gray
L....................... Blue
O ...................... Orange
R ...................... Red
Sb .................... Sky blue
EC612000
WIRING DIAGRAM
W ..................... White
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