2010 YAMAHA WR 450F Owners Manual

Page 185 of 230

YAMAHA WR 450F 2010  Owners Manual 6-17
FRONT FORK
DISASSEMBLING THE FRONT FORK
Order Part name Qty Remarks
1 Front fork cap bolt 1 Refer to removal section.
2 Fork spring 1 Drain the fork oil.
3 Dust seal 1 Refer to removal section.

Page 186 of 230

YAMAHA WR 450F 2010  Owners Manual 6-18
FRONT FORK
HANDLING NOTE
Support the machine securely so 
there is no danger of it falling over.
The front fork requires careful atten-
tion. So it is recommended that the 
front fork be maintain

Page 187 of 230

YAMAHA WR 450F 2010  Owners Manual 6-19
FRONT FORK
The bending value is shown by one 
half of the dial gauge reading.
Do not attempt to straighten a bent 
inner tube as this may dangerous-
ly weaken the tube.
CHECKING THE OUTER TUBE
1.

Page 188 of 230

YAMAHA WR 450F 2010  Owners Manual 6-20
FRONT FORK
8. Install:
• Outer tube "1"
To inner tube "2".
9. Install:
• Slide metal "1"
• Oil seal washer "2"
To outer tube slot.
Press the slide metal into the outer 
tube with fork seal

Page 189 of 230

YAMAHA WR 450F 2010  Owners Manual 6-21
FRONT FORK
20. Measure:
• Oil level (left and right) "a" 
Out of specification→Adjust.
Be sure to install the spring guide "2" 
when checking the oil level.
Never fail to make the oil level a

Page 190 of 230

YAMAHA WR 450F 2010  Owners Manual 6-22
FRONT FORK
INSTALLING THE FRONT FORK
1. Install:
• Front fork "1"
• Temporarily tighten the pinch bolts 
(lower bracket).
• Do not tighten the pinch bolts (up-
per bracket) yet.
2. Tighten:

Page 191 of 230

YAMAHA WR 450F 2010  Owners Manual 6-23
HANDLEBAR
HANDLEBAR
REMOVING THE HANDLEBAR
Order Part name Qty Remarks
Headlight 
1 Hot starter cable 1 Disconnect at the lever side.
2 Hot starter lever holder 1
3 Clutch cable 1 Disconnect at

Page 192 of 230

YAMAHA WR 450F 2010  Owners Manual 6-24
HANDLEBAR
REMOVING THE BRAKE MASTER 
CYLINDER
1. Remove:
• Brake master cylinder bracket "1"
• Brake master cylinder "2"
• Do not let the brake master cylin-
der hang on the brake hose.
•