Suzuki RM-Z250 Owner's Service Manual page 194

FUEL LEVEL
• Remove the drain hose and then install a proper cap 1 to the
carburetor drain.
• Remove the drain screw and than connect the special tool.
$ 09913-14541: Fuel level gauge set
• Hold the carburetor in the proper angle with a stand.
Lateral direction: Horizontal
Carburetor
set position
Longitudinal direction: Vertical
• Fill the float chamber with fuel.
• Remove air completely from the fuel level gauge.
• With the level gauge held vertical, lower the gauge slowly and
align the datum point A (float chamber mating surface) with
the gauge graduation.
• Wait until the fuel level stabilizes.
• Determine the zero point on the gauge graduation and after
waiting again for level stabilization, measure the height B
from the datum point A.
% Fuel level B: 6.5 mm (0.256 in) above the datum point
NOTE:
The apparent fuel level measured in the level gauge is higher
than the actual level in the float chamber because of meniscus
effect. [Meniscus is approximately 1 mm (0.039 in).]
FUEL SYSTEM
Fuel level
in gauge
Fuel level
in float
chamber
12-11