Carburetor Specifications; Carburetor Assembly; Float Level Inspection - Honda CB400T Shop Manual

HONBA
C M W B . W A
'80 ADDENDUM
V. FUEL SYSTEM
GENERAL INFORMATION
The CM400T carburetor venturi size has been changed to 30 mm (1.18 in.).
An accelerator pump circuit has been added.
Pilot screw limiter caps are used to prevent tampering and Pilot screws cannot be removed without removing the float
chambers (USA only).
See Caution and Notes under Pilot Screw Removal and Pilot Screw Adjustment (page 23-11).
Refer to section 20 for carburetor adjustment procedures not described in this section.
CARBURETOR SPECIFICATIONS
CARBURETOR SEPARATION
VACUUM CYLINDER
Remove the carburetors (page 4-2).
.K
.
, 4 - \
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
accelerator pump and fuel joint pipes.
Assemble the right and left carburetors noting
the compression spring location.
Install the front and rear stays.
Refer to page 4-8 for carburetor installation.
Item
Identification mark
ldel speed
Fast idle speed
Vacuum difference (at idle)
Float level
Pilot screw
Venturi size
FLOAT LEVEL INSPECTION
Remove the float chamber.
Using the float level gauge, measure the float
level with the float tip lightly contacting the
float valve and the carburetor inclined 15"-
45' from vertical.
CM40D'
VB22P
1,200
+
100 rpm
2,500
+
500 rpm
40 mm (1.6 in.) Hg
15.5 mm (0.61 in.)
See page 23-1 1
30 mm (1.18 in.)
FLOAT LEVEL: 15.5 mm
+
0.5 mm
(0.61
+
0.02 in.)
CM400A
VB24C
1,250
+
100 rpm
2,000
+
500 rpm
-
-
See page 23-1 1
28mm (1.10in.)
Replace if necessary.
Install the float chamber.
P
-
:?-,*
<.:.
5 : ! & ~ . ,FLOAT TIP
Date of Issue: Sept., 1979
o
HoNDA MOTOR CO.. LTD.
23-9