Yamaha Wr 450 F Owners Manual

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CHASSWINGARM
2. Install:
Bearing 1 
Oil seal 2 
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.
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:
5 mm (0.20 in)...

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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.
Do...

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CHASSWINGARM
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)
11. Tighten:
Nut (relay arm) 1 
T R..80 Nm (8.0 m · kg, 58 ft ·...

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CHAS
13. Install:
Bolt [chain tensioner (lower)] 1 
Plain washer 2 
Collar 3 
Chain tensioner 4 
Nut [chain tensioner (lower)] 5 
T R..20 Nm (2.0 m · kg, 14 ft · lb)
14. Install:
Chain support 1 
Support cover 2 
Bolt {chain support [r= 50 mm (1.97 in)]}
3 
Nut (chain support) 4 
Bolt {support cover [r= 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 

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CHASREAR SHOCK ABSORBER
EC580000
REAR SHOCK ABSORBER
Extent of removal:1 Rear shock absorber removal2 Rear shock absorber disassembly
Extent of removal Order Part name Q’ty Remarks
Preparation for removalREAR SHOCK ABSORBER 
REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNING
Support the machine securely so there is nodanger of it falling over.
Seat, fitting band and side covers Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section in the CHAPTER 4.
Air filter cover Refer...

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CHASREAR SHOCK ABSORBER
Extent of removal Order Part name Q’ty Remarks
Disconnect the starter relay cou-
pler.
Starter motor lead Disconnect at the starter relay side.
1 Locking tie 2
2 Taillight coupler 1
3 Starting circuit cut-off relay cou-
pler1
4 Plastic band 2
5 Clamp (air filter joint) 1 Only loosening.
6 Rear frame 1
7 Bolt (rear shock absorber-relay
arm)1 Hold the swingarm.
8 Bolt (rear shock absorber-frame) 1
9 Rear shock absorber 1
10 Locknut 1 Only loosening.
11 Adjuster 1 Only...

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CHASREAR SHOCK ABSORBER
Extent of removal Order Part name Q’ty Remarks
14 Spring (rear shock absorber) 1
15 Bearing 2 Refer to “REMOVAL POINTS”.
2 

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CHAS
EC586000
HANDLING NOTE
WARNING
This shock absorber is provided with a
separate type tank filled with high-pressure
nitrogen gas. To prevent the danger of
explosion, read and understand the follow-
ing information before handling the shock
absorber.
The manufacturer can not be held respon-
sible for property damage or personal
injury that may result from improper han-
dling.
1. Never tamper or attempt to disassem-
ble the cylinder or the tank.
2. Never throw the shock absorber into
an open...

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CHAS
EC583000
REMOVAL POINTS
EC583320
Bearing
1. Remove:
Stopper ring (upper bearing) 1 
NOTE:
Press in the bearing while pressing its outer
race and remove the stopper ring.
2. Remove:
Upper bearing 1 
NOTE:
Remove the bearing by pressing its outer race.
3. Remove:
Lower bearing 1 
NOTE:
Remove the bearing by pressing its outer race.
EC584000
INSPECTION
Rear shock absorber
1. Inspect:
Damper rod 1 
Bends/damage → Replace absorber
assembly.
Shock absorber 2 
Oil leaks → Replace absorber...

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CHASREAR SHOCK ABSORBER
EC585000
ASSEMBLY AND INSTALLATION
EC585300
Bearing
1. Install:
Upper bearing 1 
NOTE:
Install the bearing parallel until the stopper ring
groove appears by pressing its outer race.
ACHTUNG:CAUTION:
Do not apply the grease on the bearing
outer race because it will wear the rear
shock absorber surface on which the bear-
ing is press fitted.
2. Install:
Stopper ring (upper bearing) 1 
NOTE:
After installing the stopper ring, push back the
bearing until it contacts the...