Yamaha VMX12 2001 Service Manual page 270

CARBURETORS
EAS00495
MEASURING AND ADJUSTING THE FUEL
LEVEL
1. Measure:
• fuel level a
Out of specification → Adjust.
Fuel level
(below the line on the vacuum
chamber)
15 ~ 17 mm
a. Stand the motorcycle on a level surface.
b. Place the motorcycle on a suitable stand to
ensure that the motorcycle is standing
straight up.
c. Install the fuel level gauge 1 onto the fuel
drain pipe 2.
Fuel level gauge
90890-01312
d. Loosen the fuel drain screw 3.
e. Hold the fuel level gauge vertically next to
the line on the vacuum chamber 4.
f. Measure the fuel level a on both sides of
the carburetor assembly.
NOTE:
@
The fuel level readings should be equal on
both sides.
@
2. Adjust:
• fuel level
a. Remove the carburetor assembly.
b. Check the needle valve seat and needle
valve.
c. If either is worn, replace them as a set.
d. If both are fine, adjust the float level by
slightly bending the float tang 1.
e. Install the carburetor assembly.
f. Measure the fuel level again.
g. Repeat steps (a) to (f) until the fuel level is
within specification.
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CARB