2008 YAMAHA YZ450F fuel

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Page 75 of 188

YAMAHA YZ450F 2008  Owners Manual 4-7
CARBURETOR
CARBURETOR
REMOVING THE CARBURETOR
Order Part name Qty Remarks
Seat and fuel tank Refer to "SEAT, FUEL TANK AND SIDE 
COVERS" section.
Rear shock absorber Refer to "REAR SHOCK ABSORBER

Page 78 of 188

YAMAHA YZ450F 2008  Owners Manual 4-10
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 82 of 188

YAMAHA YZ450F 2008  Owners Manual 4-14
CAMSHAFTS
CAMSHAFTS
REMOVING THE CYLINDER HEAD COVER
Order Part name Qty Remarks
Seat and fuel tank Refer to "SEAT, FUEL TANK AND SIDE 
COVERS" section.
Hot starter plunger Refer to "CARBURETOR"

Page 87 of 188

YAMAHA YZ450F 2008  Owners Manual 4-19
CYLINDER HEAD
CYLINDER HEAD
REMOVING THE CYLINDER HEAD
Tighten the cylinder head bolts to 30 Nm (3.0 m•kg, 22 ft•lb) in the proper tightening sequence, remove and retighten the 
cylinder head

Page 115 of 188

YAMAHA YZ450F 2008  Owners Manual 4-47
CDI MAGNETO
CDI MAGNETO
REMOVING THE CDI MAGNETO
Order Part name Qty Remarks
Seat and fuel tank  Refer to "SEAT, FUEL TANK AND SIDE 
COVERS" section.
Disconnect the CDI magneto lead.
1 Left cran

Page 117 of 188

YAMAHA YZ450F 2008  Owners Manual 4-49
ENGINE REMOVAL
ENGINE REMOVAL
REMOVING THE ENGINE
Order Part name Qty Remarks
Hold the machine by placing the suitable stand 
under the frame.Refer to "HANDLING NOTE".
Seat and fuel tank Refer t

Page 145 of 188

YAMAHA YZ450F 2008  Owners Manual 5-16
FRONT FORK
FRONT FORK
REMOVING THE FRONT FORK
Order Part name Qty Remarks
Hold the machine by placing the suitable stand 
under the engine.Refer to "HANDLING NOTE".
Front wheel Refer to "FRONT W

Page 157 of 188

YAMAHA YZ450F 2008  Owners Manual 5-28
STEERING
STEERING
REMOVING THE STEERING
Order Part name Qty Remarks
TIGHTENING STEPS:
• Tighten ring nut. 38 Nm (3.8 m•kg, 27 ft•lb)
• Loosen it one turn.
• Retighten it. 7 Nm (0.7 m
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