Honda 88-91 NT650 HAWK GT Serviceanleitung Seite 20

GENERAL INFORMATION
EMISSION CONTROL SYSTEMS
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 the E.P.A. requires that motorcycles built after January 1, 1983 comply with ap-
plicable noise emission standards for one year or 6,000 km (3,730 miles) after the time of sale to the ultimate purchaser,
when operated and maintained according to the instructions provided. Compliance with the terms of the Distributor's Limited
Warranty for Honda Motorcycle Emission Control Systems is necessary in order to keep the emissions system warranty in ef-
fect.
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.
EXHAUST EMISSION CONTROL SYSTEM
Except for California:
The exhaust emission control system is composed of a lean carburetor setting, and no adjustments should be made except
idle speed adjustment with the throttle stop screw. The exhaust emission control system is separate from the crankcase
emission control system.
California only:
The exhaust emission control system consists of a secondary air supply system which introduces filtered air into the exhaust
gases in the exhaust port. No adjustments to this system should be made, although periodic inspection of the components is
recommended. The secondary air supply system helps improve emission performance.
(1) AIR CLEANER
(4) INTAKE
MANIFOLD
(3) CARBURETOR
(2) AIR
SUC!TI:O:N~[:~~~~~=~~~~:j
VALVE
1-16