Honda Activa SCV110, Service Manual Digest

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GENERAL INFORMATION
EMISSION CONTROL SYSTEMS
SOURCE OF EMISSIONS
The combustion process produces carbon monoxide and hydrocarbons. Controlling hydrocarbon emission is very important
because under certain conditions, they react to form photochemical smog when subjected to sunlight. Carbon monoxide does not
react in the same way, but it is toxic.
Honda Motor Co., Ltd. utilizes lean carburetor settings as well as other systems to reduce carbon monoxide and hydrocarbons.
CRANKCASE EMISSION CONTROL SYSTEM
The engine is equipped with a closed crankcase system to prevent the discharge of crankcase emissions into the atmosphere. Blow-
by gas is returned to the combustion chamber through the air cleaner and carburetor. Residual oil is collected in the breather pipe.
CARBURETOR
AIR CLEANER HOUSING
BLOW-BY GAS
FRESH AIR
BREATHER PIPE