Honda CBF600SA Service Manual page 53

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys.
GENERAL INFORMATION
EXHAUST EMISSION CONTROL SYSTEM
The exhaust emission control system is composed of a pulse secondary air supply system, a three-way catalytic converter
and PGM-FI system.
No adjustment should be made for the exhaust emission control system. The exhaust emission control system is separate
from the crankcase emission control system.
SECONDARY AIR SUPPLY SYSTEM
The pulse secondary air supply system introduces filtered air into the exhaust gases in the exhaust port. Fresh air is drawn
into the exhaust port by the function of the PAIR control valve.
This charge of fresh air promotes burning of the unburned exhaust gases and changes a considerable amount of
hydrocarbons and carbon monoxide into relatively harmless carbon dioxide and water vapor.
The reed valve prevents reverse air flow through the system. The PAIR control valve is operated by the solenoid valve. The
solenoid valve is controlled by the PGM-FI unit, and the fresh air passage is opened/closed according the running
condition.
No adjustments to the secondary air supply system should be made, although periodic inspection of the components is
recommended.
PAIR CONTROL SOLENOID VALVE
AIR CLEANER HOUSING
PAIR CHECK VALVE
EXHAUST PORT
THROTTLE BODY
FRESH AIR
BLOW-BY GAS
1-49
email: info@motomatrix.co.uk