Throttle Response Ignition Control System III Generation. It is a means of controlling the ignition by operating the throttle. Depending on the needs of the rider whether it be cruising, acceleration or max speed, the ignition requirements constantly change. Based on a particular amount of throttle opening, the magnetic field generated by the magnet opens or closes the reed switch. The reed switch is connected to the Digital C.D.I., which signals the C.D.I. to change / switch, the desired ignition advance timing maps. This helps in achieving a good balance between drive ability and optimum ignition spark advance, resulting in an almost perfect ignition spark advance for every throttle opening and engine rpm.