Honda CB400T Shop Manual page 282

HONDA
C M 4 0 0 E
'80 ADDENDUM
V. FUEL SYSTEM
CARBURETOR SPECIFICATIONS
HlGH ALTITUDE ADJUSTMENT
Item
Identification mark
Idle speed
Fast idle speed
Vacuum difference (at idle)
Float level
Pilot screw initial setting
'
Venturi size
Adiust the carburetors for ridino above
VB22E
1,200 +- 100 rpm
2,500 k 500 rpm
40 mm (1.6 in.) HG
15.5 mm (0.61 in.)
See page 23-1 1
30 mm (1.18 in.)
2,000 m (6,500 ft) to improve highaltitude
driveability.
HlGH ALTITUDE (Above 2,000 M16.500 ft)
CARBURETOR SPECIFICATIONS
.
Sustained operation at altitudes lower
than 1,500 meters (5.000 f t l with the
high altitude carburetor specifications
may cause engine overheating and
damage.
4 mm (118 in.)
Stopper clearance
Adjust as follows:
Remove the carburetors (page 4-2).
Remove the float chambers and secondary main jets (page 4-5).
Install #I12 secondary main jets.
Install the float chambers.
Adjust the clearance between the accelerator pump adjusting arm and stopper to 4 mm 1118 in), page 23-1 1
Install the carburetors.
Turn each pilot screw 112 turn in.
Adjust the idle speed with the throttle stop screw.
When the motorcycle i s to be ridden below 1,500 m (5,000 ft), do the following:
Install the standard size secondary main jets for the CM400E.
Adjust the accelerator pump adjusting arm and stopper clearance to the standard setting (page 23-1 1).
STANDARD CLEARANCE: 7.0 mm (114
in.)
Turn the pilot screws 112 turn out.
Adjust the idle speed with the throttle stop screw.
Date of Issue: Dec.. 1979
o
HONDA MOTOR CO., LTD.
25-9