2010 YAMAHA WR 450F Owners Manual

Page 177 of 230

YAMAHA WR 450F 2010  Owners Manual 6-9
FRONT BRAKE AND REAR BRAKE
DISASSEMBLING THE BRAKE MASTER CYLINDER
Order Part name Qty Remarks
A. Front
B. Rear
1 Brake master cylinder cap 1
2 Diaphragm 1
3 Reservoir float 1
4 Brake master cyli

Page 178 of 230

YAMAHA WR 450F 2010  Owners Manual 6-10
FRONT BRAKE AND REAR BRAKE
HANDLING NOTE
Support the machine securely so 
there is no danger of it falling over.
DRAINING THE BRAKE FLUID
1. Remove:
• Brake master cylinder cap "1"
• Protecto

Page 179 of 230

YAMAHA WR 450F 2010  Owners Manual 6-11
FRONT BRAKE AND REAR BRAKE
3. Inspect: (front brake only)
• Reservoir float "1"
Damage→Replace.
4. Inspect:
• Brake master cylinder piston "1"
• Brake master cylinder cup "2"
Wear/damage/

Page 180 of 230

YAMAHA WR 450F 2010  Owners Manual 6-12
FRONT BRAKE AND REAR BRAKE
2. Install:
• Brake caliper "1"
• Bolt (brake caliper) "2"
3. Tighten:
• Pad pin "3"
4. Install:
• Pad pin plug "4"
INSTALLING THE REAR BRAKE 
CALIPER
1. Instal

Page 181 of 230

YAMAHA WR 450F 2010  Owners Manual 6-13
FRONT BRAKE AND REAR BRAKE
INSTALLING THE FRONT BRAKE 
MASTER CYLINDER
1. Install:
• Brake master cylinder "1"
• Brake master cylinder bracket "2"
• Bolt (brake master cylinder brack-
et) "

Page 182 of 230

YAMAHA WR 450F 2010  Owners Manual 6-14
FRONT BRAKE AND REAR BRAKE
2. Install:
• Brake hose holder "1"
• Bolt (brake hose holder) "2"
3. Install:
• Brake hose holder "1"
• Nut (brake hose holder) "2"
Align the top "a" of the br

Page 183 of 230

YAMAHA WR 450F 2010  Owners Manual 6-15
FRONT BRAKE AND REAR BRAKE
A. Front
B. Rear
2. Air bleed:
• Brake system
Refer to "BLEEDING THE HY-
DRAULIC BRAKE SYSTEM" sec-
tion in the CHAPTER 3.
3. Inspect:
• Brake fluid level
Fluid at

Page 184 of 230

YAMAHA WR 450F 2010  Owners Manual 6-16
FRONT FORK
FRONT FORK
REMOVING THE FRONT FORK
Order Part name Qty Remarks
A. For CDN
Hold the machine by placing the suitable stand 
under the engine.Refer to "HANDLING NOTE".
Front wheel Refer