Emission Control Systems - Honda CBR125R Owner's Manual

GENERAL INFORMATION
EMISSION CONTROL SYSTEMS (CM type only)
EXHAUST EMISSION REQUIREMENT
The U.S. Environmental Protection Agency (EPA), California Air Resources Board (CARB) and Transport Canada 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.
NOISE EMISSION REQUIREMENT
The EPA also requires that motorcycles built after January 1, 1983 comply with applicable noise emission standards for
one year or 3,730 miles (6,000 km) after the time of sale to the ultimate purchaser, when operated and maintained
according to the instructions provided.
WARRANTY COMPLIANCE
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 effect.
SOURCE OF EMISSIONS
The combustion process produces carbon monoxide (CO), oxides of nitrogen (NO
carbon monoxide, oxides of nitrogen and hydrocarbons is very important because, under certain conditions, they react to
form photochemical smog when subject to sunlight. Carbon monoxide does not react in the same way, but it is toxic.
Honda Motor Co., Ltd. utilizes various systems (page 1-33) to reduce carbon monoxide, oxides of nitrogen and
hydrocarbons.
CRANKCASE EMISSION CONTROL SYSTEM
The engine is equipped with a closed crankcase system to prevent discharging crankcase emissions into the atmosphere.
Blow-by gas is returned to the combustion chamber through the air cleaner housing and throttle body.
THROTTLE BODY
1-32
AIR CLEANER
HOUSING
) and hydrocarbons (HC). Control of
x
CRANKCASE
BREATHER HOSE
FRESH AIR
BLOW-BY GAS