2007 YAMAHA WR 450F air filter

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Page 322 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 1
ENG
EC400000
ENGINE
EC4R0000
SEAT, FUEL TANK AND SIDE COVERS
Extent of removal:
1 Seat removal
2 Fuel tank removal
3 Side covers removal
4 Headlight removal
Extent of removal Order Part name Q

Page 323 of 794

YAMAHA WR 450F 2007  Owners Manual ENG
4 - 1
MOTOR
SITZBANK, KRAFTSTOFFTANK UND SEITENABDECKUNGEN
Arbeitsumfang:
1 Sitzbank demontieren
2 Kraftstofftank demontieren
3 Seitenabdeckungen demontieren
4 Scheinwerfer demontieren
Arbeitsumfa

Page 324 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 2
ENG
REMOVAL POINTS
Side cover
1. Remove:
• Bolt (side cover)
 Side cover (right) 1 
NOTE:
Draw the side cover backward to remove it
because its claw a is inserted in the air filter
case.
SEAT

Page 325 of 794

YAMAHA WR 450F 2007  Owners Manual ENG
4 - 2
DEMONTAGE-EINZELHEITEN
Seitenabdeckung
1. Demontieren:
Seitenabdeckungs-Schraube
Seitenabdeckung rechts 
1 
HINWEIS:
Die Seitenabdeckung nach hinten
schieben, um deren Haltenase 
a
aus dem

Page 346 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 13
ENGCARBURETOR
Needle valve
1. Inspect:
Needle valve 1 
Valve seat 2 
Grooved wear a → Replace.
Dust b → Clean.
Filter c 
Clogged → Clean.
EC464300
Throttle valve
1. Check:
Free moveme

Page 364 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 22
ENGAIR INDUCTION SYSTEM
AIR INDUCTION SYSTEM
Extent of removal:
1 Air induction system removal
Extent of removal Order Part name Q’ty Remarks
AIR INDUCTION SYSTEM 
REMOVAL
1 Bracket 1
2 Air c

Page 365 of 794

YAMAHA WR 450F 2007  Owners Manual ENG
4 - 22
SEKUNDÄRLUFTSYSTEM
Arbeitsumfang:
1 Sekundärluftsystem demontieren
ArbeitsumfangReihen-
folgeBauteil Anz. Bemerkungen
SEKUNDÄRLUFTSYSTEM DEMONTIE-
REN
1Halterung 1
2 Sekundärluft-Abscha

Page 366 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 23
ENGAIR INDUCTION SYSTEM
INSPECTION
Air induction system
1. Inspect:
Air induction hose
Crack/damage → Replace.
Air induction pipe
Crack/damage → Replace.
2. Check:
Operation of air cut v
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