Air Vent Control Valve Inspection (California Model Only) - Honda Hawk GT NT650 1988 Service Manual

A937X-041-XXXXX or
ST -AH-260-MC7
(U.S.A. only)
(1)TOAIR
JOINT PIPE
----
CAUTION
A937X - 041 - XXXXX or
ST -AH-260-MC7
(U.S.A. only)
AIR VENT CONTROL VALVE INSPECTION
(California model only)
Disconnect the Air Vent Control Valve (AVCV) hoses from
their connections and remove the AVCV from its mount. Refer
to the routing label on the air cleaner case cover for hose con-
nections.
Connect a vacuum pump to the No.1 0 hose that goes to the
right carburetor body.
Apply the specified vacuum to the AVCV.
SPECIFIED VACUUM: 250 mm (9.8 in) Hg
TOOL:
Vacuum/Pressure pump
Vacuum pump
The specified vacuum should be maintained.
Replace the AVCV if vacuum is not maintained.
• To prevent damage to the air vent control valve, do not use
high pressure air sources. Use a hand operated air pump only.
Connect the vacuum pump to the air vent port of the AVCV.
Apply vacuum to the AVCV. The vacuum should hold steady.
Replace the AVCV if vacuum leaks.
TOOL:
Vacuum/Pressure pump
Vacuum pump
FUEL SYSTEM
(2) TO OPEN AIR
• (3) AIR VENT CONTROL
I
VALVE
(4) TO CHARCOAL
CANISTER
/1
(5)
TO / ' \
CYLINDER
INTAKE PORT
(6) VACUUM PUMP
(1) VACUUM PUMP
Connect the vacuum pump to the No.1 0 hose that goes to the
right carburetor body.
Connect the pressure pump to the air vent port of the AVCV.
While applying the vacuum to the AVCV No. 10 hose that
goes to the right carburetor body, pump air through the air
vent port.
Air should flow through the AVCV and out of the hose that
goes to the carburetor air joint pipe.
Replace the AVCV if pressure is not retained.
Remove the pumps, install the AVCV on its mount, route and
reconnect the hoses according to the routing label.
Plug the hose that goes to the carburetor air joint pipe.
While applying vacuum to the AVCV No.1 0 hose that goes to
the 3-way joint, apply air pressure. It should hold steady.
TOOL:
Vacuum/Pressure pump
Vacuum pump
Pressure pump
TOOL:
Vacuum/Pressure pump
Vacuum pump
Pressure pump
A937X-041-XXXXX or
ST-AH-260-MC7
ST -AH-255-MC7
(U.S.A. only)
A937X-041-XXXXX or
ST -AH-260-MC7
ST-AH-255-MC7
(U.S.A. only)
4-17