Honda CB400T Shop Manual page 266

HONDA
C B 4 0 0 8
' 8 0 CB400T ADDENDUM
VI. FUEL SYSTEM
GENERAL INFORMATION
The C84OOT carburetor bore size has been changed to 30 mm (1.18 in).
.
An accelerator pump circuit has been added.
See Caution and Notes under Pilot Screw Removal and Pilot Screw Adjustment (Page 24-1 1).
Refer t o section 20 for carburetor adjustment procedures not described in this section.
CARBURETOR SPECIFICATIONS
Identification mark
Idle speed
Vacuum difference ( a t idle)
Float level
Pilot screw initial opening
Venturi bore Primary
Secondary
VB22B
1,200
?
100 rpm
40 mmHg (1.6 inHg)
15.5
2
0.5 mm (0.61
?
0.02 in)
See page 24-1 1
13 mm (0.5 in)
30 mm (1.2 in)
CARBURETOR SEPARATION
Remove the carburetors (page 4-21,
Separate the carburetors (page 4-2) noting
that the accelerator pump joint pipe must be
removed.
CARBURETOR ASSEMBLY
install a new O-ring on each end of the ac-
-
celerator pump and fuel joint pipes.
/
Assemble the right and left carburetors noting
ACCELERATOR PUMP JOINT PIPE
the compression spring location.
Install the front and rear stays.
Refer to page 4-8 for carburetor installation.
FLOAT LEVEL INSPECTION
Measure the float level with the float tip just
contacting ; h e float valve and the carburetor
inclined 15 -45' from vertical.
FLOAT LEVEL: 15.5 mm
f
0.5 mm
(0.61 t 0.02in)
Replace the float if necessary.
Date of Issue: Nov., 1979
O HONDA MOTOR CO., LTD.