Assembling The Carburetor - Yamaha YFM250RX 2008 Service Manual

CARBURETOR
11.Check:
• starter plunger
• starter plunger spring
Bends/cracks/damage → Replace.
EBS00150

ASSEMBLING THE CARBURETOR

CAUTION:
Before reassembling, wash all of the parts
in a clean petroleum based solvent.
1. Measure:
• float height
Out of specification → Adjust.
Float height (F.H)
13.0 mm (0.51 in)
a. Hold the carburetor in an upside down posi-
tion.
b. Measure the distance from the front mating
surface of the float chamber (gasket
removed) to the top of the float.
NOTE: NOTE:
The float arm should be resting on the needle
valve, but not compressing it.
c. If the float height is not within the specifica-
tion, check the valve seat and needle valve.
d. If either is worn, replace the valve seat,
needle valve and O-ring as a set.
e. If both are fine, adjust the float height by
bending the float tang
f. Recheck the float height.
5-6
CARB
on the float.