Secondary Air Supply System; Air Cleaner - Honda Activa SCV110 Service Manual Digest

SECONDARY AIR SUPPLY SYSTEM

NOTE:
The secondary air supply system introduces filtered air
into exhaust gases in the exhaust port. The secondary air
is drawn into the exhaust port whenever there is negative
pressure pulse in the exhaust system. This charged
secondary air promotes burning of the unburned exhaust
gases and changes a considerable amount of
hydrocarbons and carbon monoxide into relatively
harmless water and carbon dioxide respectively.
Remove the following:
— Fuel tank (page 5-11)
Check the air injection hoses between the pulse
secondary air injection (PAIR) control valve and cylinder
head cover for deterioration, damage or loose
connections. Make sure that the hoses are not cracked.
NOTE:
If the hoses show any signs of heat damage, inspect the
PAIR check valve in the PAIR control valve for damage.
Check the air suction hose between the air filter,
air chamber and PAIR control valve for deterioration,
damage or loose connections. Make sure that the hoses
are not kinked, pinched or cracked.
SECONDARY AIR SUPPLY SYSTEM

(AIR CLEANER)

REMOVAL/INSTALLATION
Lift up the body cover (page 2-3).
Remove the screw and housing cover from the
secondary air cleaner.
Remove and clean the secondary air cleaner element as
per maintenance schedule.
Wash the element in non-flammable or high flash point
solvent, and let it dry thoroughly.
Never use gasoline or low flash point solvent for
cleaning the element. A fire or explosion could result.
Soak the element in engine oil (SAW 20W40) equivalent
and squeeze out any excess oil.
Installation is in the reverse order of removal.
Do not rinse the filter element with both hands.
PAIR CONTROL VALVE
PAIR CHECK VALVE
SCREW
SECONDARY AIR CLEANER
ELEMENT
MAINTENANCE
HOUSING COVER
3-11