HONDA
CM400E
'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
ftl 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
is
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
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