Honda CM400A - Fuel System; High Altitude Adjustment

HONDA
'79 ADDENDUM CM400T.400A
X. FUEL SYSTEM
HlGH ALTITUDE ADJUSTMENT
Adjust the carburetors for riding above 2,000 m (6,500 ft) to improve high altitude driveability.
HlGH ALTITUDE (ABOVE 2,000 rn/6,500 ft)
CARBURETOR SPECIFICATIONS
CAUTION I
Sustained operation at altitudes lower than 1,500 meters (5,000 ft) with the high altitude carburetor specifications
may cause engine overheating and damage.
CM4OOT
Secondary
Main Jet
Pilot Screw
Idle speed
Adjust
as follows:
CM400T:
Remove the float chambers and secondary main jets. (page 4-51,
Install # 108 secondary main jets.
Install the float chambers.
Turn each pilot screw in
112 turn.
Adjust the idle speed with the throttle stop screw.
CM400A:
Turn each pilot screw in 112 turn.
Adjust the idle speed with the throttle stop screw.
CM400A
When either model motorcycle is to be ridden below 1,500 m (5,000 ft), do the following:
#I08
112 turn in
1,200
+ 100 rpm
Install the standard size secondary main jets for the
CM400T.
Turn the pilot screws 112 turn out.
.
Adjust the idle speed with the throttle stop screw.
112 turn in
1,250
+ 100 rpm
22-20
Date of Issue: Nov., 1979
O HONDA MOTOR CO., LTD.