ELECTRONIC IGNITION SYSTEM SUZUKI 1977-1978 GS550 GS750 KD DS3-1 The Dyna S DS3-1 is a self-contained electronic ignition system designed to replace the original points assembly in specific 1977-1978 Suzuki GS550 and GS750 models equipped with Kokusan Denso (KD) ignition systems.
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