Dyna ignition and coils problem

[evans]

I have Dyna coils and Dyna S 2-1 ignition system on my z1000 A1. About 12mths ago the coil for cylinders 2&3 went down, no spark on 3. Replaced with a Denso off a GSX 1100 I had lying around. This lasted until a couple of weeks ago. Then that coil seem to go down, after it running as though there was a fuel blockage, but must have been the coil, no spark on cylinder no.3. Tried new spark plug, nothing. So replaced with the other Denso coil. This fired straight away. Job done !! Only the following week this coil literally melted !!!! Bought new dyna coil, no spark from 2&3 ???? Have I somehow buggered the Dyna S electronic ignition unit, (1&4 fine but nothing on 2&3) before I purchase another expensive item ???? Thoughts appreciated.

Cheers

Chris

[Garn 1]

Evans, before you do anything else, check your charging rate.
I would expect your voltage is not being regulated,
Simply, with motor running, check the voltage across the battery, Take the revs up to say 3500RPM and see if it reads >14.0volts.

Then look at whether you have the correct coils for the DynaS.
I have had a DynaS pick-up fail. But that's pretty unusual.

RegardZ.

[Mr Puffin]

Evens the GSXR if i remember correctly the coils have a differant ohm rating to Zed ones, so it has probably failed. Do a search for the GSXR coils so you can compare

[evans]

Ok will check charge across the battery, are you suggesting the regulator/rectifier is not working properly ?
I do have the correct Dyna coils for the Dyna S ignition, they are the DS1 green 3 ohm ones.

Regarding the GSX coils they are 3 ohm rated and I did have one working successfully for 18mths with no problems.

[steve bowdler]

I do not think it is unusual for Dyna S to fail there have been a few lately ,mine included !

[evans]

I think I need a new Dyna S !!!
I checked the Denso GSX 1100M coils that I have been uing on the 2&3 cylinder side and it apperas they must be compatible, as the replacement Dyna coils for that bike are the same as the ones for the Zed, DS-1, green 3 Ohm. So may be it was just a dodgy coil that shorted and cooked the module ???

[Ginger Bear]

If you leave the ignition switched on for any amount of time, without the bike running, there is a good chance you'll melt or burn out a coil.

[evans]

It Denso coil actually melted while the bike was running.

[jimmock]

Sorry Guyz,

Wrong thread for me.

I thought it was about another type of coil !!!!

[Robw]

As said in a previous thread my Dyna S seemed to stop working properly, changed it for a Dyna 2000 seems to work okay now.
Rob

[Pigford]

Check the Dyna coil terminals ain't shorting on the support posts - also ensure they are not forced onto the mounting plate when tightened onto the bike - this can cause them to crack (the green body is weak).

As mentioned - leaving the ignition on can burn the Dyna pickups.

As for coils melting - not totally uncommon

[Garn 1]

If the regulator is allowing the battery to overcharge you will cook the coils.
You didn't say you have checked this!
Yes! I am suggesting the regulator/rectifier may not be working!
You are wasting time if you have not checked this.
RegardZ

[steve bowdler]

I agree with Garn check your voltages , Dyna S does not like extra voltage

[paulmceleney]

THIS HAPPENED TO ME FIRST WITH DYNA COILS, FIRST 2&3 WENT DOWN REPLACED COIL. NEXT WEEK 1&4 WENT DOWN. THE NEXT WEEK DYNA IGNITION PACK UP, NOW RUNNING STANDARD COILS AND BACK ON POINTS. CHECK THE BATTERY AND IT WAS VERY LOW, TOP UP WITH ELECTOLITE ACID AND ITS BEEN OK THE REGULATOR WAS NOT OVER CHARGING THE BATTERY

[evans]

Thanks for all your replies.
Regulator checked ok. So I think it was probably a short on the old dodgy Denso that put on there that caused the coil to melt and the power module to pack in.
Have ordered another Dyna S for it, so fingers crossed !!!