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Yamaha Wr 450 F Owners Manual

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Page 231

5 - 6
CHASFRONT WHEEL AND REAR WHEEL
5. Install:
Wheel
NOTE:
Install the brake disc 1 between the brake
pads 2 correctly.
Make sure that the projections a in the trip
meter gear unit fits over the stopper b on
the front fork outer tube.
6. Install:
Wheel axle 1 
NOTE:
Apply the lithium soap base grease on the
wheel axle.
7. Install:
Nut (wheel axle) 1 
T R..105 Nm (10.5 m · kg, 75 ft · lb) 

Page 232

5 - 7
CHASFRONT WHEEL AND REAR WHEEL
8. Tighten:
Bolt (axle holder) 1 
NOTE:
Before tightening the bolt, fit the wheel axle to
the axle holder by stroking the front fork sev-
eral times with the front brake applied.
T R..23 Nm (2.3 m · kg, 17 ft · lb)
9. Install:
Brake hose 1 
To brake hose holder 2.
NOTE:
Before tightening the bolt (brake hose holder),
align the top a of the brake hose neck with the
brake hose holder bottom b. Then pass the
brake hose in front of the axle boss c and fit it
into the...

Page 233

5 - 8
CHAS
Rear wheel
1. Install:
Bearing (right) 1 
Circlip 2 
Spacer 3 
Bearing (left) 4 
Oil seal 5 
NOTE:
Apply the lithium soap base grease on the
bearing and oil seal lip when installing.
Install the bearing with seal facing outward.
Use a socket that matches the outside diam-
eter of the race of the bearing.
Right side of bearing shall be installed first.
Install the oil seal with its manufacture’s
marks or numbers facing outward.
ACHTUNG:CAUTION:
Do not strike the inner race of the...

Page 234

5 - 9
CHASFRONT WHEEL AND REAR WHEEL
4. Install:
Collar 1 
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
5. Install:
Wheel
NOTE:
Install the brake disc 1 between the brake
pads 2 correctly.
6. Install:
Drive chain 1 
NOTE:
Push the wheel 2 forward and install the drive
chain.
7. Install:
Chain puller (left) 1 
Wheel axle 2 
NOTE:
Install the chain puller (left), and insert the
wheel axle from left side.
Apply the lithium soap base grease on the
wheel axle.
8. Install:
Chain puller...

Page 235

5 - 10
CHAS
9. Adjust:
Drive chain slack a 
Refer to “DRIVE CHAIN SLACK
ADJUSTMENT” section in the CHAP-
TER 3.
Drive chain slack:
40 ~ 50 mm (1.6 ~ 2.0 in)
10. Tighten:
Nut (wheel axle) 1 
Locknut 2 
T R..125 Nm (12.5 m · kg, 90 ft · lb)
T R..16 Nm (1.6 m · kg, 11 ft · lb)
FRONT WHEEL AND REAR WHEEL 

Page 236

5 - 11
CHASFRONT BRAKE AND REAR BRAKE
EC5A0000
FRONT BRAKE AND REAR BRAKE
EC5A8000
FRONT BRAKE
Extent of removal:1 Brake hose removal2 Caliper removal
3 Master cylinder removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalFRONT BRAKE 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.
Drain the brake fluid. Refer to “REMOVAL POINTS”.
1 Hose cover 1
2 Brake hose holder 1
3 Bolt...

Page 237

5 - 12
CHAS
EC5A8100
REAR BRAKE
Extent of removal:1 Master cylinder removal2 Brake hose removal
3 Caliper removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalREAR BRAKE 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.
Rear wheel Refer  to “FRONT WHEEL AND REAR
WHEEL” section.
Drain the brake fluid.  Refer to “REMOVAL POINTS”.
1 Brake pedal 1
2 Master cylinder 1
3 Brake hose...

Page 238

5 - 13
CHAS
EC5A8200
CALIPER DISASSEMBLY
ÅFront
ıRear
Extent of removal:1 Front caliper disassembly2 Rear caliper disassembly
Extent of removal Order Part name Q’ty Remarks
CALIPER DISASSEMBLYAB
1 Pad pin 1 1
2 Brake pad 2 2
3 Pad support 1 1
4 Caliper piston 2 1
Refer to “REMOVAL POINTS”. 5 Dust seal 2 1
6 Piston seal 2 1
12
FRONT BRAKE AND REAR BRAKE 

Page 239

5 - 14
CHASFRONT BRAKE AND REAR BRAKE
EC5A8300
MASTER CYLINDER DISASSEMBLY
ÅFront
ıRear
Extent of removal:1 Front master cylinder disassembly2 Rear master cylinder disassembly
Extent of removal Order Part name Q’ty Remarks
MASTER CYLINDER DISAS-
SEMBLY
1  Master cylinder cap 1
2 Diaphragm 1
3  Master cylinder boot 1
4  Circlip 1 Use a long nose circlip pliers.
5 Plain washer 1
6 Push rod 1
7 Master cylinder kit
1
12
12 

Page 240

5 - 15
CHASFRONT BRAKE AND REAR BRAKE
EC5A3000
REMOVAL POINTS
Brake fluid
1. Remove:
[Front]
Master cylinder cap 1 
[Rear]
Master cylinder cap 1 
Protector
NOTE:
Do not remove the diaphragm.
ÅFront
ıRear
2. Connect the transparent hose 2 to the
bleed screw 1 and place a suitable con-
tainer under its end.
ÅFront
ıRear
Å
ı
3. Loosen the bleed screw and drain the
brake fluid while pulling the lever in or
pushing down on the pedal.
ACHTUNG:CAUTION:
Do not reuse the drained brake fluid.
Brake fluid may...
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