INTAKE AND EXHAUST CONTROL
AND ENGINE MANEGEMENT SYSTEM
The SET (Suzuki Exhaust Tuning) system controls exhaust pressure waves in order to improve
engine combustion at low rpm range.
In general, exhaust systems for high performance motorcycles tend to create drops in torque at
low-and mid-range, due to the influence of exhaust pressure pulses.
The drop in torque at mid-range has been improved by measures such as choosing the right
length, diameter and collection method for the exhaust pipes, but the drop in torque at low-range
is difficult to improve with such methods.
The drop in torque at low-range is caused by exhaust pressure pulses generated inside the
exhaust system. Combustion at low-range can be improved by dampening such pressure pulses.
Intake and Exhaust Control and Engine Management Systems
3-22
2003 GSX-R1000 Torque Improvement by Exhaust Tuning valve
Without Exhaust Tuning Valve
With Exhaust Tuning Valve
Max 6%
Engine rpm
Torque
Using this system, torque output, when the throttle is fully opened, has been increased by approx.
6 percent at around 3,000 rpm.
