Yamaha SX500D, Supplementary Service Manual

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CARBURETORS
CARB
NOTE:
NOTE:
ASSEMBLY
Reverse the “DISASSEMBLY” procedure. Note
the following points.
Before reassembling, wash all parts in clean
gasoline.
Always use a new gasket and O-ring.
1. Tighten:
Inner parts
Pilot air jet / main air jet:
0.7 Nm (0.07 m kg, 0.5 ft lb)
Screw (valve seat):
1 Nm (0.1 m kg, 0.7 ft lb)
Pilot jet:
0.7 Nm(0.07 m kg, 0.5 ft lb)
Main jet:
1.8 Nm (0.18 m kg, 1.3 ft lb)
Starter plunger assembly:
2.5 Nm (0.25 m kg, 1.8 ft lb)
2. Measure:
Float height
a
Out of specification Adjust.
Float height
a
:
21.3 23.3 mm
(0.839 0.917 in)
Measurement and adjustment steps:
Hold the carburetor in an upside down posi-
tion.
Measure the distance between the carburetor
body and top of the floats.
The float arm should be resting on the valve, but
no compressing the needle valve.
If the float height is not within specification, in-
spect the valve seat and needle valve.
If either is worn, replace them both.
If both are fine, adjust the float height by bend-
ing the float arm tang
1
on the float.
Recheck the float height.