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Silvers pattern ignition coils

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royhall:
Got some replacement coils from DSS. Does it matter which way they are connected as the terminals have no identifying marks, and the cables (black & yellow) are separate patch cables. Cheers.

Johnwebley:
I fitted a set to my 500,

 tried both either way ,!!  didn't seem to make any difference,although I am running Boyer ignition,

ps,I did have one coil fail when getting warm,it had lasted about 15 months,

PPS,leave a plenty long plug leads,so you can use the coil 1-4 to run 2-3,and vice versa!,ideal for checking ignition problems

mike the bike:
It makes no difference.   The back EMF (spark) happens when the current suddenly stops flowing (the points open).  It doesn't matter which way the current was flowing, particularly as there is a spark plug both ends of the secondary winding.

ST1100:

--- Quote from: Johnwebley on January 05, 2016, 04:48:00 PM ---I did have one coil fail when getting warm,it had lasted about 15 months,
--- End quote ---
So you wouldn't vouch for their quality?
I've an identical set coming as the plug wires on my '76 are all hardened and cracking...

Johnwebley:

--- Quote from: ST1100 on January 05, 2016, 06:09:18 PM ---
--- Quote from: Johnwebley on January 05, 2016, 04:48:00 PM ---I did have one coil fail when getting warm,it had lasted about 15 months,
--- End quote ---
So you wouldn't vouch for their quality?
I've an identical set coming as the plug wires on my '76 are all hardened and cracking...

--- End quote ---


 well,only one gave problems,maybe it was a friday coil !!
they give big fat sparks,I would guess they are better than 40 year old originals

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