ble 1
provides the specification for fuel level, mea-
sured from (
Figure 73
) the upper edge of the float
bowl with the carburetors mounted on the motorcy-
cle.
This measurement is more accurate than a float
height measurement because the actual fuel level
can vary between carburetors, even when the floats
are set at the same height. Fuel level inspection re-
quires a special fuel level gauge (Yamaha part No.
YM-01312-A or 90890-01312).
Inspection/Adjustment
Inspect or adjust the fuel level as follows:
WARNING
Some gasoline will drain from the
carburetors during this procedure.
Work in a well ventilated area at least
50 feet from any open flame. Do not
allow anyone to smoke. Wipe up spills
immediately.
1. Remove the fuel tank, air filter housing and
surge tank as described in this chapter.
2. Use a jack and/or wood blocks to level the mo-
torcycle. Make sure the carburetors are level.
3. Connect the fuel level gauge (A,
Figure 73
) to
the drain on the carburetor. Secure the gauge so it
sits vertically against the float bowl.
4. Loosen the carburetor drain screw (B,
Figure
73
).
5. Wait until the fuel in the gauge settles.
6. Fuel level (C,
Figure 73
) equals the distance be-
tween the fuel level in the gauge and the upper edge
of the float bowl. Record the fuel level and compare
the reading to the specification in
Table 1
.
7. Repeat this procedure for the other carburetor.
The fuel level of one carburetor should equal the
fuel level of the other.
NOTE
If the float bowls empty during this
procedure, temporarily install the fuel
tank and refill the float bowls. Remove
the fuel tank, then proceed to the next
step.
8. If the fuel level in a particular carburetor re-
quires adjustment, adjust the float height as follows:
a. Remove the carburetor assembly as described
in this chapter.
b. Remove the float bowl from the appropriate
carburetor.
c. Remove the float pin screw (A,
Figure 51
),
pull pin (B), and lift out the float.
d. Remove the needle valve from the float tang.
e. Bend the float tang (
Figure 74
) as required to
attain the correct fuel level. Install the float
bowl.
f. Reinstall the carburetor assembly and re-
check the fuel level.
AIR/FUEL, EXHAUST AND EMISSION CONTROL SYSTEMS
223
8
73
74
72