Start with just the ignition module using this Dyna S Ignition System, for SOHC CB750 or CB500/CB550 riders who already have suitable coils. Skip the kit, upgrade the ignition.Same Dyna S you'll find in our Premium and Ultimate kits: self-contained electronic ignition housed behind the ignition cover, magnetic rotor preserving the factory advance curve, individual front/rear cylinder timing, and the performance benefits that come with modern state-of-the-art ignition engineering. Works with your stock coils or any coils 3 Ohm or higher. Made in the USA.Includes instructions and a one-year Dynatek warranty.Key Features• Dyna S electronic ignition module only• Works with stock coils or any coils 3 Ohm or higher• Magnetic rotor preserves factory advance curve• Individual front/rear cylinder timing• Made in the USA• Instructions and 1-year warranty includedFitment / Compatibility• Honda CB750K (1969‑78)• CB750F (1975‑78) Supersport• CB750A (1976‑78) Hondamatic• Honda CB500K (1971‑73)• CB550K (1974‑78)• CB550F (1975‑77) SupersportPart Number: 07-9988