Honda CB HORNET 160R 2015, Shop Manual

Page: 91 / 336

5-19
FUEL SYSTEM
SECONDARY AIR SUPPLY SYSTEM
SYSTEM INSPECTION
Warm up to the engine to normal operating temperature.
Disconnect the air suction hose from the air cleaner
housing.
Check the air suction hose port is clean and free carbon
deposits.
If the port is carbon fouled, check the PAIR control valve.
Disconnect the air suction hose from the resonator air
chamber.
Then check the air suction hose is clean and free of carbon
deposits.
Disconnect the vacuum hose of PAIR control valve then
it connect the vacuum pump and plug the vacuum port
Start the engine and open the throttle slightly to be certain
that air is sucked in through the air suction hose.
If the air is not drawn in, check the air suction hose for
clogging.
With the engine running, gradually apply vacuum to the
PAIR control valve vacuum hose.
Check that the air suction hoses stop drawing air and that
the vacuum hose not bleed.
SPECIFIED VACUUM: 53.3 kPa (400 mm Hg)
If the air is drawn in or if the specified vacuum is not
maintained, install a new PAIR control valve.
PAIR CHECK VALVE INSPECTION
• Remove the following:
– PAIR control valve (page 5-20)
– Two screws
– Valve cover
– Pair check valve.
Check the valve reed for fatigue or damage, replace the
PAIR control valve if necessary.
Replace the PAIR control valve if the seat rubber is cracked,
deteriorated or damaged, or if there is clearance between
the reed and seat.
Installation is in the reverse order of removal.
PORT
HOSE
VACUUM HOSE
AIR SUCTION HOSE
VACUUM PUMP
PLUG
CHECK VALVE
VALVE COVER
SCREWS