Dyna did a very good marketing and sales job to convince buyers that Honda was incompetent to design and implement an ignition system.
Honda design:
Spark plugs - non resistor type.
Plug caps - 5k ohm for good longevity reasons (or 10k ohm if demanded by gov import requirements based on the desire to reduce radio frequency interference from the unshielded spark leads).
Plug wires - stock coils had stranded aluminum wire that the stock plug caps screw into tightly. Most sales and marketing will entice you with either resistance wire from automotive applications that they stock on hand, (sometimes with flashy colors). Or, with copper core wire with the enticement of “ lower resistance” to impress those that don’t realize that the resistance difference of about 0.0001 ohms is insignificant when 5000 ohms ( x2) is placed in the circuit path added to the 15,000 to 16,000 ohms inherent in the coil secondary windings.
3 ohm primary coil merchants sell you the promise of “hotter” spark, as if you needed that with a stock compression ratio engine, that was able to operate 50,000 miles plus with the more than adequate 5 ohm primary coils. The Dyna system with 3 ohm coils draw nearly twice the load on the charging system and electrical connections in trade for not adjusting/checking points at 3000 mile intervals.
Beware marketing and salesmen willing to take your money preying on your ignorance of real needs.
If only the stock ignition leads didn’t harden and crack with the age these bikes attain (sigh).
