Emission Control System Descriptions; Source Of Emissions; Crankcase Emission Control System - Honda Motorcycle Service Manual

EMISSION CONTROL SYSTEMS
SYSTEM DESCRIPTIONS
The U.S. Environmental Protection Agency and California Air Resources Board (CARB) require manufacturers to certify that
their motorcycles comply with applicable exhaust emissions standards during their useful life, when operated and maintained
according to the instructions provided, and that motorcycles built after January 1, 1 9 8 3 comply with applicable noise emis-
sion standards for one year or 6,000 k m (3.730 miles1 after the time of sale t o the ultimate purchaser, when operated and
maintained according t o the instructions provided. Compliance w i t h the terms of the Distributor's Warranties for Honda
Motorcycle Emission Control Systems is necessary in order t o keep the emissions system warranty in effect.
SOURCE OF EMISSIONS
The combustion process produces carbon monoxide and hydrocarbons. Control of hydrocarbons is very important because,
under certain conditions, they react t o form photochemical smog when subjected t o 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 emission control systems, t o reduce carbon monoxide
and hydrocarbons.
CRANKCASE EMISSION CONTROL SYSTEM
The crankcase emission control system routes crankcase emissions through the air cleaner and into the combustion chamber.
Condensed crankcase vapors are accumulated in an airloil separator and crankcase breather tube which must be emptied
periodically. Refer t o the Maintenance Schedule for each model..The crankcase breather tube needs t o be checked for oil
accumulation more frequently if the machine has been consistantly ridden at high speeds or i n rain.
Date o f Issue: March, 1 9 9 5
7-2
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H o N D A MOTOR CO.,LTD.