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Yamaha Motor YZ450F 2003 Manuel D'atelier Du Proprietaire page 276

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1
CARBURETOR
Accelerator pump timing adjustment
Adjustment steps:
NOTE:
In order for the throttle valve height a to
achieve the specified value, tuck under the
throttle valve plate 1 the rod 2 etc. with
the same outer diameter as the specified
value.
Throttle valve height:
3.40 mm (0.134 in)
Fully turn in the accelerator pump adjust-
G
ing screw 3.
Check that the link lever 4 has free play
G
b by pushing lightly on it.
Gradually turn out the adjusting screw
G
while moving the link lever until it has no
more free play.
Carburetor installation
1. Install:
Carburetor joint 1
G
NOTE:
Install the projection a on the cylinder head
between the carburetor joint slots b.
2. Install:
Carburetor 1
G
NOTE:
Install the projection a between the carburetor
joint slots.
3. Install:
Hot starter plunger 1
G
4 - 19
ENG
3 Nm (0.3 m · kg, 2.2 ft · lb)
2 Nm (0.2 m · kg, 1.4 ft · lb)

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Yz450fs 2003