Up To 6 Horsepower Increase. Dyna S Ignition with rotor and Coil Kit.. The Dyna S High Performance Ignition System, is a complete self-contained electronic ignition system built with the latest state-of-the-art engineering. This is the same ignition used by top racers over the past 2 decades. The Dyna S is completely housed behind the ignition cover and uses a magnetic rotor with the original spark advancer, so the factory advance curve is maintained. The item "Dynatek Ignition & Coil Kit Suzuki GS400 GS 400 Twin DS3-3C Includes DC10-1 Dyna" is in sale since Wednesday, May 23, ...