High Altitude Adjustment - Honda VT750C2 Shadow Spirit Service Manual

FUEL SYSTEM
11.Remove the fuel tank (page 3-4).
VACUUM PUMP
Remove the plug from the vacuum hose, then
disconnect the vacuum pump and connect the
vacuum hose to the PAIR control valve vacuum PAIR CONTROL VALVE
~
VACUUM HOSE
hose joint. Install the fuel tank (page 3-4).
12.Readjust the idle speed with the throttle stop
screw knob.
IDLE SPEED: 1,200
±
100 rpm
13.Disconnect the tachometer.
\
.
PLUG
HIGH ALTITUDE ADJUSTMENT
This adjustment
When the vehicle
i~
to be operated continuously above 6,500 feet (2,000 m), the carburetor setting
must be made at
must be changed as described below to improve driveability and decrease exhaust emissions.
high altitude to
ensure proper high
altitude operation.
STANDARD SETIING HIGH ALTITUDE SETIING
Below 5,000 ft (1,500 m) Above 6,500 ft (2,000 m)
Main jet #122 #120
Pilot 49 states/Canada Factory preset 3/4 turn in from factory preset
screw type (2 turns out) (1-1/4 turns out)
opening
California type Factory preset 3/4 turn in from factory preset
(2-1/8 turns out) (1-3/8 turns out)
PAIR control valve
.
PIN: 18650-MFE-671 PIN: 18650-MFE-801
*
If afterburn appears when snapping the throttle grip closed, during engine braking, it is necessary to
replace the PAIR control valve (page 6-29) for high altitude riding in addition to changing the carbure­
tor setting.
Remove the carburetor (page 6-7) and the float
chamber.
Replace the standard main jet with the high altitude
type.
HIGH ALTITUDE MAIN JET: #120
Check that the O-ring on the float chamber is in
good condition, replace it if necessary.
Install the float chamber and carburetor (page 6-21).
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