2009 YAMAHA WR 450F height adjustment

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Page 75 of 226

YAMAHA WR 450F 2009  Owners Manual 3-20
CHASSIS
2. Remove:
• Brake lever cover
3. Adjust:
• Brake lever position
Brake lever position adjustment 
steps:
a. Loosen the locknut "1".
b. Turn the adjusting bolt "2" until the 
lever pos

Page 106 of 226

YAMAHA WR 450F 2009  Owners Manual 5-8
CARBURETOR
HANDLING NOTE
Do not loosen the screw (throttle 
position sensor) "1" except when 
changing the throttle position sen-
sor due to failure because it will 
cause a drop in engine perfor-

Page 109 of 226

YAMAHA WR 450F 2009  Owners Manual 5-11
CARBURETOR
16. Install:
• Jet needle "1"
•Collar "2"
• Spring "3"
• Needle holder "4"
• Throttle valve plate "5"
To throttle valve "6".
17. Install:
• Throttle valve assembly "1"
•