Oxidation Catalytic Converter; Noise Emission Control System; General Information - Honda 2003 NPS50 Ruckus Service Manual

GENERAL INFORMATION

EXHAUST EMISSION CONTROL SYSTEM (After '05 model)
SECONDARY AIR SUPPLY SYSTEM
The secondary air supply system introduces filtered air into the exhaust gases in the exhaust port. Fresh air is drawn into
the exhaust port whenever there is a negative pressure pulse in the exhaust system. This charge of fresh air promotes
burning of the unburned exhaust gases and changes a considerable amount of hydrocarbons and carbon monoxide into
relatively harmless carbon dioxide and water vapor.
No adjustment to the PAIR system should be made, although periodic inspection of the components is recommended.
PAIR CHECK VALVE

OXIDATION CATALYTIC CONVERTER

This scooter is equipped with an oxidation catalytic converter.
This oxidation catalytic converter is in the exhaust system. Through chemical reactions, it converts H C and CO in the
engine's exhaust to carbon dioxide (COz ) and water vapor.

NOISE EMISSION CONTROL SYSTEM

TAMPERING WITH THE N OISE CON TROL SYSTEM IS PROHIBITED: U.S. Federal law prohibits, or Canadian provincial law
may prohibit the fallowing acts or the causing thereof: ( 1 ) The removal or rendering inoperative by any person, ather tan
far purposes of maintenance, repair or replacement, of any device or element of design incorporated into any vehicle far
the purpose of noise control prior to its sale or delivery to the ultimate customer or while it is in use; (2) the use of the
vehicle after such device or element of design has been removed or rendered inoperative by any person.
AMON G THOSE ACTS PRESUMED TO CONSTITUTE TAMPERIN G ARE THE ACTS LISTED BELOW:
1 . Removal of, or puncturing of the muffler, baffles, header pipes or any ather component which conducts exhaust gases.
2. Removal of, or puncturing of any part of the intake system.
3. Lack of proper maintenance.
4. Replacing any moving parts of the vehicle, or parts of the exhaust or intake system, which parts other then those
specified by the manufacturer
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EXHAUST PORT
AIR CLEAN ER
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FRESH AIR
EXHAUST GAS