Boyer Ignition, any suggestions

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Hello everyone, I just put a Boyer ignition on my 1972 Norton Commando, so I decided to get the Boyer ignition, its starts a lot easier, and runs a lot more solid. Before I changed out my points, I tested the voltage on my coils, one coil was pushing the proper voltage at 6 volts, the other one was at 12 volts, has anyone run into this? My main question does anyone have any suggestions of what coils to use with the Boyer ignition and where to get them?

I appreciate your help, and any suggestions you may have, I have also put in some pic's of my Norton.
 

grandpaul

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Use a Dyna dual lead 12v coil, or equivalent. I forgot what ohm rating coil the boyer likes, but it has to be the right one; look it up on Boyer's site.
 
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Thanks Grandpaul, I just wanted to make sure those are the best ones to use, have you used them with a Boyer Ignition?
 
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Boyer supply their own 12v single coil dual output which I have found very good over the years.
Regards Hursty.
 
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Hey Seth,

Nice looking Roadster!

I have a similar bike with Boyer ignition and have replaced the two Lucas coils with one dual coil kit from www.pazon.com and with the USD/NZD exchange rate will make a very cheap upgrade and tidies up the look under ther tank.

Cheers
Kevin
 
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Almost any of the dual tower 3-5 ohm dual towers will work jsut fine. Many are made by the same company, but individually branded for Dyna, Andrews, Accell, etc. The barrel shaped 4.2 ohm coil from any of those companies is pretty standard fare and will work well with the Boyer MkIII.
 
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I use a dual output 12v coil from a Kawasaki GPZ 550.
They're not too expensive and they have ( unlike many japanese bikes) replaceable HT leads.
 
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Re: I need new Coils with my new Boyer Ignition, any suggest

I use a Dyna dual-fire coil as well and it works great. However, if you want to keep the stock appearance of your bike, just replace the coils you have (should be 6 volt) with new PVL 6 volt coils wired in series and toss the ballast resistor. Two PVLs may be slightly cheaper than the Dyna. It is possible to run dual 12V coils but the overall resistance may be too high which is why Boyer recommends using two 6 volt coils. Here's some info from the British Cycle Supply web site that may be of help:

http://www.britcycle.com/Products/331/331_series.htm
 

Ron L

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If you want to change to a single coil, then do it. I am not sure you have a problem. The original points set up is wired to pass the 12 volt feed through a ballast resistor to drop it to 6 volts to the coils wired in parallel. The Boyer ignition does away with the ballast resistor and fires the coils in series.

I suspect your original problem was the wiring of the coils or a ballast failure. Possibly one coil was being fed by a 12 volt source while the other was seeing the voltage drop from the ballast resistor rather than both being fed by the ballast. If you followed the Boyer instructions correctly the ballast resistor is disconnected and your coils now wired in series. You stated earlier that the bike starts easier and runs stronger. It seems you have already solved your problem!
 
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Thanks Everyone I appreciate the feed back, and I am going to look into the options, I will let you know what I came up.
 
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