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General Information
Emission Control Systems
The U.S. Environmental Protection Agency and California Air Resources Board (CARB) require manufacturers to certify that
their scooters comply with applicable exhaust emissions standards during their useful life, when operated and maintained ac-
cording to the instructions provided, and that scooters built after January 1, 1983 comply with applicable noise emission
standards for 1 year or 6,000 km (3.730 miles) after the time of sale to the ultimate purchaser, when operated and main-
tained according to the instructions provided. Compliance with the terms of the Distributor's Warranties for Honda Motor-
cycle Emission Control Systems is necessary in order to 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 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 hydro-
carbons.
Crankcase Emission Control System
The crankcase emission control system routes crankcase emission through the air cleaner and into the combustion chamber.
Condensed crankcase vapors are accumulated in an air/oil separator and drain tube which must be emptied periodically. Refer
to the Maintenace Schedule (page 3-4l. The drain tube needs to be checked for oil accumulation more frequently if the ma-
chine has been ridden mostly at high speeds or in rain.
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111 AIR CLEANER
121 CARBURETOR
!
131 DRAIN TUBE
141 DRAIN PLUG
<~,
151 FRESH AIR
. . 161 BLOW-BY GAS
1-19
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