I need some help. Have a 96 S&S motor that keep blowing ignitions and I dont know why. I blew a crane single fire and replaced it with the Dyna S set up. It has probably 100 miles on it and now its not giving me spark.
I thought my Tach in line resistors went bad because the Revs started looking all weird and jumpy when I took it over 4k rpms so I replaced it with a new one, I went to start the bike and I get no spark. Any ideas? I am going to try and trouble shoot it some more, but its getting 12+ but not sparking.

 

i had same thing check all your grounds. thats what i found on mine.

 

I'm having the same issues , fried my screaming eagle race ignition module I replaced it with a stock set-up but still get no spark ,I was told by a member on here & a tech a HD that it could be the ignition sensor under the timing cover..
I hope that info helps you
I'm not going to be able to fix it till after vacation, if you happen to get yours running please let me know what you did To get it running.
Thanks

 

It's not the engine that's blowing them! You have a fundamental electrical problem. Go through the instructions for fitting your ignition system with a magnifying glass! Make sure every last detail is complete, especially ground returns.

 

I was thinking ground as well, I will pull out my fine tooth comb and review all my connections. I really hope I can figure it out, I am about to blow the effin thing up. Thanks guys.

 

Also check your charging system. Put a volt meter across the battery when it's running and check the voltage. Should be about 14.7. If more, that could be your problem and the regulator is shot. Next, put the meter on AC Volts and check again. If you get a reading >0, your regulator is shot.

 

Electronic ignitions need resistor or spiral suppression type plug wires as well as the proper coil. Did you use a matched set?

Also is your exhaust real close to the pick-up? Try header wrap or a heat shield if it gets too hot in that area.

 

Most of the aftermarket modules have a diagnostic LED that is used for static timing as well.
When you switch the ignition ON, the led should come up for a second or so, indicating that all the circuits are alright. If there is an open circuit somewhere (the sensor or the coil), the LED will not come up

 

So I took out the whole thing, tested it and was not getting any power from the ignition module when I was cranking it. I am sending it back to the manufacturer so they can test it and perhaps warranty it.

Question: Could it be that I need a rev limiter to prevent the next one from burning out? I run the bike really hard, has a balanced and honed crank along with some high compression pistons I like to wind out. Previous to the DynaS I had a Crane Hi4 that I burnt out as well, I didnt go with a new Crane because the way the coil mounted it kept cracking and dropping off so I went with the DynaS. Could it be the revs are going to high?

 

No, high RPM won't cause the module to burn out. A bad or incorrect coil might.