Honda CX500 1978 Shop Manual page 297

HONDA
'81 ADDENDUM
2. INSPECTION AND ADJUSTMENT
FUEL LINE
Replace any parts which show deterioration,
damage or leakage.
CARBURETOR SYNCHRONIZATION
a t
normal operating temperature, trans-
mission in neutral, and vehicle on center
Remove the plugs from the carburetor spacers
and install adapters.
Connect the vacuum gauges. (see page 3-7).
Start the engine and adjust the idle speed to
1,100
+
100 rpm.
The difference of vacuum between cylinders
should be within 40 mm (1.6 in) Hg.
MUST BE WITHIN 40mm (1.6 in) Hg OF EACH OTHER
&
ADJUSTMENT
Stop the engine and remove the seat and fuel
tank.
Prepare a longer fuel tube and connect it
between the fuel tank and carburetor.
Position the tank higher than normal.
Start the engine and adjust the idle speed to
1,100
+
100 rpm.
Loosen the adjusting screw lock nut.
Balance the vacuum between cylinders to with-
in 40 mm (1.6 in) Hg of each other. by turning
the adjusting screw. The No.
1 carb
is the base
and cannot be adjusted.
Hold the adjusting screw, and tighten the lock
nut.
Recheck the synchronization and idle speed.
Reinstall the fuel tank and seat.
LOCI
\
<
NUT 1
24-6
Date of Issue: January, 1981
O HONDA MOTOR CO.. LTD.