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Electronic ignition

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Johnwebley:
I think the Boyer stator are just 2 coils in series mounted at 180degrees


If it was damaged, I assume you would get no sparks,

I had similar problem a few years ago,

It was a DSS  coil breaking down,
I paid extra for Boyer original style coils, work ok now,



Sent from my SM-A750FN using Tapatalk

AshimotoK0:
Interestingly, I looked back and John (Webley) got this reply a couple of years back.

Re: Advance curve


Boyer Bransden Electronics Ltd <help@boyerbransden.com>

Thank you for your enquiry, sorry we don't publish this information as we have a few secrets that do give us an edge. You may note  that we fire all cylinders every 180 deg, this requires a little trickery, but it works.

Regards Tech Dept.

Hmm .. not sure they would take kindly to nerds like me de-potting their units to see how they 'tick'... but the Norton bloke obviously did just that  in the late 90's and his findings are  still out there on the net. If they are savvy anyway,  they probably code-protect the chip (s) in their micro-digital version,  so it would be more or less impossible to read the code and copy their system.  Do they still sell a version of their original  'analogue' system?

Here is Ernie Bransdens original patent:  No longer in force after the mid 90's ;)

https://worldwide.espacenet.com/patent/search/family/010462758/publication/GB1299853A?q=bransden%20ernest%20ignition



This is a good reference in the link below  from Microchip (a chip manufacturer that I use all of the time)  and one of these days I am going to make an EI based on this app. note.  The one bike which would really benefit from EE  with electronic advance etc. is the CB72/77. Honda mounted the auto-advance in between the two cams halves on this model  and it's notorious for causing problems and very expensive to fix. There is a company in Germany that makes a crank mounted EI system which gets rave reviews but I don't think you get much change from £400 for their system (more than I paid for my bike !)

http://ww1.microchip.com/downloads/en/AppNotes/00001980C.pdf

K2-K6:

--- Quote from: Oddjob on January 27, 2022, 01:47:48 AM ---Ash, reading that Norton BB post made my head hurt. Shame on you picking on an old man.
--- End quote ---

 ;D if that one hurt, Ash's next one on microchip ignition will be visible from down here as Ken explodes  :D

AshimotoK0:
Back to  :-X :-X :-X then sorry  :-[ :-[ :-[

Oddjob:
Green1, have you tried reverting back to points and condensers?

Ash, I have smoke coming out of my ears now, if I self combust I'm blaming you.

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