coil impedance

well, these are the original 1975 coils on my kz900...i'm sure they have went up with age..currently they ohm at 4.5 ohms. what i dislike most is that the wires are formed into the coils..no way to put new wires on them. these other coils would be great is the ohm range is good. thanks for the link, i'll check it out.<br><br>Post edited by: arobsum, at: 2006/11/25 22:36

As I understand, the suppression wire core is for use with audio equipment to help avoid the ignition static delivered by the copper wire core (and maybe better for some type of more sophisticated electronic iginitions). Perhaps this is related to use of NGKB8RES plugs (as opposed to NGKB8ES) which are supposed to help eliminate radio interferrence, and maybe the resistance type spark plug caps also. I believe the spark plug caps on the Dyna copper core wires are the straight through type and not the resistance type. In any event, the Dyna coils and plug wires deliver a healthy fat spark, and since installing them I've had no further ignition spark issues.<br><br>Post edited by: Patton, at: 2006/11/25 23:23

Are you saying suppresion wire should be used if you have electronic ignition? As in stock electronic ignition with the manual advancer? I need to know...

Here is info from the Z1E listing --

Dyna Ignition Wires - 7mm Suppression Core (Black)...
DYDW600 Dynatek Black 7mm Suppression core wires with plug caps, rubber boots and connectors...Dynatek "Dyna" Wires are available with a solid copper core for use on older vehicles where electrical interference is not an issue. For use on new vehicles with electronic advance ignitions or other sensitive electronic equipment use DYNA suppression wires with a high grade graphite core for best performance and electrical noise suppression.

I'm guessing a little, but believe the relatively simple and easy to install Dyna S timing plate used to replace the points plate is not an electronic iginition (or a CDI either) and works just fine with copper core plug wires (might also be okay with graphite core -- but why gamble).

Dyna also produces the more expensive and sophistocated Dyna 2000 which is billed as a programable electronic ignition, with use of graphite core recommended -- see following link:

www.z1enterprises.com/detail.aspx?ID=368

When listening to a portable sound source with ear speakers (from my old tape cassette days while touring), the "R" plugs and graphite core wires seemed to help reduce static interference from the ignition. Don't know how ignition static might affect music listening from compact disk or modern ipod units.

Forgive another guess, but I believe your stock ignition with manual advancer is very close to the Dyna S unit (and perhaps uses copper core wires from the stock coils -- and maybe even resistor type plug caps for reasons I don't understand). If your stock plug wires are graphite core, I don't understand the reasoning behind that either. Just old fashioned perhaps, but I like copper in my wires.

Post edited by: Patton, at: 2006/11/26 10:45

Post edited by: Patton, at: 2006/11/26 10:47