Yamaha YFM250XL(C) Service Manual page 183

CARBURETOR
3.Install:
O-ring
Washer
Spring
Pilot screw
Pilot screw:
2 turns out
4.Install:
Needle valve 1
Float 2
Float pin 3
NOTE:
Install the float pin in the direction of the
arrow.
5.Measure:
Float height a
Out of specification → Adjust.
Float height (F.H.):
12 ~ 14 mm (0.47 ~ 0.55 in)
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Measurement and adjustment steps:
Hold the carburetor in an upside down
position.
Measure the distance from the front mat-
ing surface of the float chamber (gasket
removed) to the top of the float.
NOTE:
The float arm should be resting on the nee-
dle valve, but not compressing it.
If the float height is not within the specifi-
cation, inspect the valve seat and needle
valve.
If either is worn, replace them both.
If both are fine, adjust the float height by
bending the float tang 1 on the float.
Recheck the float height.
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CARB
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