Carburetor-Synchronization - Honda CX650C 1983 Shop Manual

MAINTENANCE
SPARK PLUG
CYLINDER HEAD COVER CAP
Install the removed parts in the reverse order of
disassembly.
with oil before tightening.
TIMING
INSPECTION CAP VACUUM GAUGE 07404--0020000 OM
NOTE
adjustment i s performed with engine at
normal operating temperature, transmission in
/
neutral, and the motorcycle on its center
/
stand.
Prepare a longer fuel tube and connect
it
between
the fuel tank and carburetor. Position the tank
higher than normal.
Remove the screw plugs from the carburetor intake
pipe and install the vacuum gauge adapters.
Connect the vacuum gauges.
Apply vacuum of 12-20 mm Hg (0.5-0.8 in Hg )
t o the fuel valve vacuum tube.
Start the engine and adjust the idle speed to 1,100
t 100 rpm.
The difference of vacuum between cylinders should
be less than 40 mm (1.6 in) Hg.
Loosen the adjusting screw lock nut.
Balance the vacuum between cylinders t o within 40
mm
(1.6
in) Hg of each other, by turning the
adjusting screw with tool 07908-422Q100.
Hold adjusting screw, and tighten the lock nut.
Recheck the synchronization and idle speed. Re-
move the adaptors and install the carburetor intake
pipe plugs.
Reinstall the fuel tank and seat.
M937B-021 -XXXXX (U.S.A. ONLY)
CARBURETOR SYNGI-I~ONIZATIO~\~
LOCK NUT WRENCH 07908-4220100
ADJUSTING SCREW
Date of Issue: December, 1982
O
HONDA MOTOR
CO.,
LTD.
3-9