Yamaha YZ250F 2004 Manuel D'atelier Du Proprietaire page 290

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6
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2 3
4
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CARBURETOR
15. Install:
• Jet needle 1
• Collar 2
• Spring 3
• Needle holder 4
• Throttle valve plate 5
To throttle valve 6.
16. Install:
• Throttle valve assembly 1
• Screw (throttle shaft) 2
NOTE:
Install the valve lever rollers 3 into the slits a
of the throttle valve.
17. Install:
• O-ring 1
• Valve lever housing cover 2
• Bolt (valve lever housing cover) 3
18. Install:
• Carburetor breather hose 1
NOTE:
Install the carburetor breather hoses to the
carburetor so that the hoses do not bend near
where they are installed.
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:
0.9 mm (0.035 in)
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Yz250ft 2004

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