Secondary Air Supply System (Sw, Ar, Iig Type Only) System Inspection - Honda VTR1000F Service Manual

SECONDARY AIR SUPPLY SYSTEM
(SW, AR, IIG type only)
SYSTEM INSPECTION
Start the engine and warm it up to normal operat-
ing temperature.
Remove the air cleaner element (page 3-6).
Check that the secondary air intake port is clean
and free of carbon deposits.
Check the pulse secondary air injection (PAIR)
check valves if the port is carbon fouled.
Disconnect the air supply (air cleaner housing-to-
PAIR control valve) hose from the air cleaner hous-
ing.
Disconnect the PAIR control valve vacuum tube
from the 3-way vacuum joint and plug the vacuum
joint.
Connect a vacuum pump to the PAIR control valve
vacuum tube.
Start the engine and open the throttle slightly to be
certain that air is sucked in through the air supply
hose.
If the air is not drawn in, check the air supply hoses
for clogging.
With the engine running, gradually apply vacuum
to the PAIR control valve vacuum tube.
Check that the air supply hose stops drawing air,
and that the vacuum does not bleed.
SPECIFIED VACUUM: 400 mm Hg (15.7 in Hg)
If the air is drawn in, or if the specified vacuum is
not maintained, install a new PAIR control valve.
If afterburn occurs on deceleration, even when the
secondary air supply system is normal, check the
air cut-off valve.
FUEL SYSTEM
AIR INTAKE PORT
AIR SUPPLY HOSE
PAIR CONTROL VALVE AIR SUPPLY HOSE
VACUUM PUMP
VACUUM TUBE
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