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Technical Information
188
Emission Control Systems
Source of Exhaust Emissions
The combustion process produces carbon monoxide (CO), oxides of
nitrogen (NOx) and hydrocarbons (HC). Control of hydrocarbons and
oxides of nitrogen 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 various systems to reduce carbon
monoxide, oxides of nitrogen and hydrocarbons.
Exhaust Emission Control System
The exhaust emission control system is composed of appropriate
carburetor settings. No adjustments should be made except for an
idle speed adjustment with the throttle stop screw or carburetor
adjustment for high altitude operation.
The exhaust emission control system is separate from the crankcase
emission control system.
20 TRX90X-31HP27200.book 188 ページ ２０１９年５月２８日 火曜日 午前９時５８分
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