Fitting a Dyna S ignition system - with pictures

[Pigford]

It's voltage spike from the field collapsing.

OK smart arse..... whats the rest of the spec.....

Diode type
Where it's fitted

[Taffus]

Diode? are you sure? a capacitor would do that, it blocks dc but alows ac (spike) to short earth its what is called a condensor in the points system

[cra-z1]

You should be able to find them at most auto stores. Just picked up a couple more for my other projects. Except rated for 30 amps,which is plenty.

[Pigford]

OK, but which - diode or capacitor, and where abouts is it connected

[Taffus]

Protection diodes for relays
Protection diode for a relay Transistors and ICs must be protected from the brief high voltage produced when a relay coil is switched off. The diagram shows how a signal diode (eg 1N4148) is connected 'backwards' across the relay coil to provide this protection.

Current flowing through a relay coil creates a magnetic field which collapses suddenly when the current is switched off. The sudden collapse of the magnetic field induces a brief high voltage across the relay coil which is very likely to damage transistors and ICs. The protection diode allows the induced voltage to drive a brief current through the coil (and diode) so the magnetic field dies away quickly rather than instantly. This prevents the induced voltage becoming high enough to cause damage to transistors and ICs.



In the diagram it is the controlling transistor that needs protecting from the relay coil, in this example the transistor is the switch, on our bikes and using the relay, the switch is the ignition key....... so no need to worry. I would not worry too much about arcing across the relay points as they switch very slowly and only once ie when the key is turned on.

Clear as mud?

[cra-z1]

There are no transitors wired in series with the relay, at least on the older bikes. The Dyna-S ignition is wired through the N.O. set of contacts on the relay. I may be wrong but I do not think you need to worry about inducing voltage to any part of an older bikes system.

[Gavin]

I have just noticed the advance unit in this tread differs from the one on my Z900 A4/5 so when fitting a dyna s system can someone let me know which timing mark do I use. Part No. 21148-010 is the one for the A4
Thanks in advance

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[000zeds]

F on 1 + 4

[Pigford]

Best to set it statically .... hold advance fully open (advanced) & set firing at 35 degs (or whatever) with a degree wheel, just watch for the spark, do for both pick-up; simples and dead accurate

[Yellow]

Fitted Dyna S to Z1000 ST, have 3 volt Accell coils, followed all the instructions.
Bike started and ran fine, took it out for a spin, about 12 miles out it stops, get a lift home and open the points cover and the ignition module is cooked...
What could have caused this???

[DogsbolloxofZ1B]

Yellow,
You say you have 3V coils, aren't the std 12V on that model?
my electronics is a bit rusty but could be a complete impedance
mismatch leading to higher current in the primary side of coil
than Dyna switching cc't can sink.
I'd double check the compatability of those coils.

my 2cents

[ADRIAN H]

Yellow,
You say you have 3V coils, aren't the std 12V on that model?
my electronics is a bit rusty but could be a complete impedance
mismatch leading to higher current in the primary side of coil
than Dyna switching cc't can sink.
I'd double check the compatability of those coils.

my 2cents

Agree

[z1bman]

Yellow,
You say you have 3V coils, aren't the std 12V on that model?
my electronics is a bit rusty but could be a complete impedance
mismatch leading to higher current in the primary side of coil
than Dyna switching cc't can sink.
I'd double check the compatability of those coils.

my 2cents

i think he means 3.0 ohm's

[Yellow]

Sorry 12V 3 Ohm coils...

will change back to standard to be sure...

[ZedHead]

Interesting that both pickups are cooked.

These are designed to work with 3 Ohm coils so should be ok.

My initial thoughts are you need to look at your regulator