1979 KZ650C Stator

Happy Holiday's!!!
But, I have a 1979 KZ650 C3 and it has a Phase 1 Stator(stock on this model). After reading for hours it seems that a 3 phase permanent magnet system: output power is increased by 50%. So using a Dyna-S Ignition on a Phase 1 stator (from what I read ), might not work . As the Dyna-S requires more output. So changing to a Phase 3 would fix this problem(if it should happen).
Has anyone confirm the above? My stator is fine, but thinking about the Dyna-S and just want to make sure I don't run into a problem such as above. I do know I would have to buy a new Regulator/Rectifier(Mosfet or Rick's).

What is it that you are trying to accomplish?

On one hand switching to the Dyna system would involve changing the coils and the entire ignition system. This would be rather expensive and somewhat of a pain to do, but it would eliminate the need to install new points about every 10,000 miles. On the other hand you could simply change the points about every 10,000 miles and not change out the entire ignition system. Obviously there would be no cost savings in changing out the entire ignition system, but you would not need to install new points every 10,000 miles so depending on how many miles you plan to rack up every year this could be a good investment. Unlike the points system, there is of course the chance of a hard failure with the new system. and that might leave you stranded, but from what I've read that is not a highly likely scenario.

So back to the original question - what is it that you are trying to accomplish? Ed

Have read that the Dyna-S Ignition is the way to go. So if I switch to it most likely I will need to change to Phase 3 stator. As the Phase 1 will need more output power for the Dyna-S Ignition.
Now if that is wrong above......then I will keep everything the same and just change my Regulator/Rectifier(as the stock one is toast)that has 2 yellow wires from it.

Some 78 and 79 kz650 had issues with a Dyna S and the stock 1-phase charging system, but most did not. Only a few.

It's just that of the bikes that had this problem, it was more often a 78/79 Kz650. But that doesn't mean that most 78/79 650's have this problem.

Anyway, the best way to tell is to try it. Install the Dyna S and see what the voltage on the battery is while revving. If you use factory 4 ohm coils or Dyna 5 ohm coils, it will save power and you might not have a problem even with a weak charging system. The spark will still be very strong.

A more problematic issue is usually wiring condition and switch and fuse holder condition as well.

loudhvx wrote: If you use factory 4 ohm coils or Dyna 5 ohm coils.

Dyna pairs Dyna S with DC1-1 coils, 3Ohm. I am in the same boat. I ordered Dyna S + coils , will see how it goes on 78' KZ650

katit wrote:

loudhvx wrote: If you use factory 4 ohm coils or Dyna 5 ohm coils.

Dyna pairs Dyna S with DC1-1 coils, 3Ohm. I am in the same boat. I ordered Dyna S + coils , will see how it goes on 78' KZ650

Yes, but it's not a requirement. The requirement is 3 ohms or higher. The dwell is super long on a Dyna S, so it works well with higher resistance coils.

loudhvx wrote:

katit wrote:

loudhvx wrote: If you use factory 4 ohm coils or Dyna 5 ohm coils.

Dyna pairs Dyna S with DC1-1 coils, 3Ohm. I am in the same boat. I ordered Dyna S + coils , will see how it goes on 78' KZ650

Yes, but it's not a requirement. The requirement is 3 ohms or higher. The dwell is super long on a Dyna S, so it works well with higher resistance coils.

I am just going with what Dynatek support told me, I listed quotes from their responses here:
www.kzrider.com/forum/4-electrical/61506...eded?start=12#840412

Sounds like a lot of combinations will work, but they recommend specific one for longevity? Don't know..

Higher resistance coils will have more longevity because they will use less current and generate less heat .

They recommend 3 ohms under the impression that it will provide more spark energy. But with such long dwell angles, it's a bit overkill. Obviously the original points system using 4 ohm coils and about half the dwell angle provided adequate spark when the bikes were new.

If you already ordered the 3 ohm coils, that should be fine. I only mentioned it in case you wanted to save some money by using the original 4 ohm coils, assuming they were still in good condition. That said, it's more reassuring to have new coils.

loudhvx wrote: Higher resistance coils will have more longevity because they will use less current and generate less heat .

They recommend 3 ohms under the impression that it will provide more spark energy. But with such long dwell angles, it's a bit overkill. Obviously the original points system using 4 ohm coils and about half the dwell angle provided adequate spark when the bikes were new.

If you already ordered the 3 ohm coils, that should be fine. I only mentioned it in case you wanted to save some money by using the original 4 ohm coils, assuming they were still in good condition. That said, it's more reassuring to have new coils.

Good info, thank you! I didn't plan to get coils originally, just ordered Dyna-S but then started to check coils and found one bad, so well..