Honda ST50 1969 Shop Manual page 91

90
CT70 '79 ADDENDUM
VI. CARBURETOR
WARNING
Gasoline is extremely flammable and is explosive
under certain condilions.
Do not smoke
or allow
flames or sparks
in
your working area.
NOTE
When disassembling fuel system parts, note the
locations or 1he
0-rings.
Replace them with new ones on reassembly. The
float bowl has a drain plug that can
be
loosened to
drain residual gasoline.
DISASSEM BLY
Turn the fuel valve OFF and disconnect the fuel line.
Loosen the carburetor band screw and flange nuts.
Remove the carburetor.
Loosen the ca rbu retor cap and remove the throttle valve,
spring, andjct needle.
Disconnect the throttle cable.
Remove the fuel valve and strainer.
Remove the float chamber body.
Remove all remaining parts.
Inspect the main and slow jets for clogging. Blow clear
with compressed air if necessary.
Inspect the fuel valve and strainer, and clean as necessary
Inspect the noat valve, pilot screw, jet need le , and needle
jet for deposits, grooving, or damage and clean or replace
as
required.
ASSEMBLY
Assembly
is
essentially the reverse of disassembly.
NOT E
Adjust the noa1 level by carefully bending the float
arm until the tang lightly contacts t he float valve at
the specified measurement.
FLOAT LEVEL: 10.7 mm (0.42 in)
After assembly, perform the fo llowing:
Install carburetor.
Adjust the pilot screw (page 91) and engine idle speed
(page 82).
PILOT -~·
SCRE~1' "
NEEDLE JET
/ NEEDLET
•!).,/
HOLER
" ' . (MAIN
-,v
JET