Exhaust Emission Control System Description; Noise Emission Control System Description - Suzuki GSF1250 Service Manual

Exhaust Emission Control System Description

The exhaust emission control system is composed of the PAIR system, HO2 sensor, catalyst system and ISC system.
The fresh air is drawn into the exhaust port through the PAIR control solenoid valve and PAIR reed valve. The PAIR
control solenoid valve is operated by the ECM, which is controlled according to the signals from TPS, ECTS, IATS,
IAPS and CKPS.
ISC valve adjusts the bypass air volume of the throttle body to control engine idling speed with various sensor signals
by varying engine running conditions and the idling control contributes to reduce exhaust emission level.
"A"
1. PAIR control solenoid valve
2. PAIR reed valve
3. Fuel injector

Noise Emission Control System Description

TAMPERING WITH THE NOISE CONTROL SYSTEM PROHIBITED: Local law or federal law prohibits the following
acts or the causing thereof:
• The removal or rendering inoperative by any person, other than for purposes of maintenance, repair or
replacement, of any device or element of design incorporated into any new vehicle for the purpose of noise control
prior to its sale or delivery to the ultimate purchaser or while it is in use, or
• The use of the vehicle after such device or element of design has been removed or rendered inoperative by any
person.
Among Those Acts Presumed to Constitute Tampering are the Acts Listed Below:
• Removing or puncturing the muffler, baffles, header pipes, screen type spark arrester (if equipped) or any other
component which conducts exhaust gases.
• Removing or puncturing the air cleaner case, air cleaner cover, baffles or any other component which conducts
intake air.
• Replacing the exhaust system or muffler with a system or muffler not marked with the same model specific code as
the code listed on the Motorcycle Noise Emission Control Information label.
1
2
4. ECM
5. HO2 sensor
6. Catalyst
Emission Control Devices:
3
5
6
"A": From air cleaner box
"B": Fresh air
"C": Exhaust gas
1B-3
B718H11201003
4
"B"
"C"
I718H1120039-03
B718H11201004