Electronic ignition problems?

[motorpickle]

Has anyone experienced problems running the electronic ignition module that bolts to the timer head and replaces the points/condenser? Does this unit fry coils? The V-Twin catalog lists a replica coil for 6-volt systems, but it is for "points" only applications. The message being don't use it with electronic ignitions?
Has anyone used the electronic ignition with a replica coil and fried the coil?
(I would rather not start a debate about electronic ignition verses points. We can save that for another day.)
Thanks in advance and hope to see many of you in Oley!

[duffeycycles]

they work with the points coil.These V-Twin coils are not perfect. I have sold 2 that didn't fire on 1 cylinder,something I have not seen on stock coils-not wire or connection related

[motorpickle]

That is exactly what I am talking about. I have a new out-of-the-box replica coil and it fired on the front lead for five minutes---then nothing! Must be no quality control in India. The only problem I have is that I installed the replica because my original coil died on the same lead. That's why I was pondering the electronic ignition as a possible problem. I hate this thinking stuff...hurts the brain.....

[Chris Haynes]

Did you notice the + and - marks on the terminals of the repop coil? They are are opposite sides from those on a genuine coil.

[Will]

I am on my third in 2 years. I have had so much bad luck with repop coils, I carry an extra in the saggle bag

[knuckleheadtim]

I'm not sure why it matters which way the primary leads are connected, because either way one plug is going to fire reverse polarity. Maybe the coil is more effecient in one direction and provides a hotter spark.

I'm on my 3rd repop coil in 2 years while waiting for my originals to be rebuilt. The bike has gone from a one-kicker to embarassing some times. I ran an old round coil for years and never had a problem with it, even with a hole worn in the side and oil leaking out. My original coils always failed because I didn't seal the wires really well, and moisture got into them. When they got hot, they would drop one cylinder.

See you at Oley!

[Sargehere]

I'm not sure why it matters which way the primary leads are connected, because either way one plug is going to fire reverse polarity. Maybe the coil is more effecient in one direction and provides a hotter spark.

...See you at Oley!

It is an interrupted DC circuit. One direction, only. Think of trying to push water uphill. It really does matter, as the magnetic fields around the coils are created and break down, hundreds (and thouands) of times a second. Eventually the windings will physically break down, if wired backwards. I have a box of useless Tedd's v-twin repro coils to prove it, too.



The high tension leads are one positive, one negative, in the DC high-tension circuit. It likes to be complete, with both plugs in the circuit and grounded to the engine block and all, but because of the voltage, juice will leak through ground and only one plug will fire, but won't like it.
Here's Champion Spark Plug's take on the twin-lead coils as used in our vee twin engines:
http://www.championsparkplugs.com/sp...411.asp?mfid=2

click on: "Ignition Terms," then> "Wasted Spark Ignition" down on the yellow bar on the left side of the page.

[knuckleheadtim]

I understand the whole waste spark concept, but I cant find any information indicating DC coils are more effecient when connected one way as opposed to the other. All the information I find indicates it will just reverse the polarity of the output. Since the center of the secondary windings is isolated from ground, I don't see any consequence to reversing the flow. The flux builds up and collapses either way and cuts the secondary windings either way. I'm guessing the direction the windings take moving from the center to the outside affect the impedence more in one direction than the other, but can't find anything to support it.

[Sargehere]

It's all in here: http://en.wikipedia.org/wiki/Transfo...power_equation
Wikipedia's not completely useless.