Yamaha YZ250F 2004 Manuel D'atelier Du Proprietaire page 276

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HANDLING NOTE
1
Do not loosen the screws (throttle position
sensor) 1 except when changing the throt-
tle position sensor due to failure because it
will cause a drop in engine performance.
REMOVAL POINTS
Pilot screw
1. Remove:
NOTE:
To optimize the fuel flow at a small throttle
opening, each machine's pilot screw has been
individually set at the factory. Before removing
the pilot screw, turn it in fully and count the
number of turns. Record this number as the
factory-set number of turns out.
INSPECTION
Carburetor
1. Inspect:
NOTE:
• Use a petroleum based solvent for cleaning.
• Never use a wire.
4 - 11
CARBURETOR
CAUTION:
• Pilot screw 1
• Carburetor body
Contamination → Clean.
Blow out all passages and jets with com-
pressed air.
ENG

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Yz250ft 2004

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