6v Ignition Coil Recommendations?

Hi all,

I am replacing all my ignition system. New plugs, leads, caps etc ordered but I am struggling a bit in trying to choose coils so am looking for advice please.

The modern 1&7/8" Lucas 6v coils (made in India) get a bit of bad press around reliability. Whilst I want to retain originality, I am not too precious when it comes to sensible upgrades. E.G. the bike has a Boyer electronic ignition. I want to replace my coils with reliable and ideally higher powered (to allow a bigger gap / spark) coils of the same size and connections.

Any recommendations on coils available in the UK please?

Thanks
Ian

 

Thanks for the fast reply. It is a 79 T140e Bonneville. It has the original 2x 6v coils (wired in series). Problem I have is identifying reliable high-quality new coils to replace the old ones. Any recommendations please?

 

Interesting, thanks. I didn't know that.
Both of my coils LT side measure 1.9ohms, so that is 3.8ohms total.

 

I have opted for the Trispark coils. Will fot them and report back.
Thanks all!

 

So, I checked the HT circuit. There were resistor caps and resistor plugs, doubling resistance to 8.5k ohms, and the HT leads were also quite tired. So I replaced with new high'quality cables, non-resistor plug caps, new coil caps and new non-resistor plugs, then retested. Better regularity of spark but still not great distance jumping (only the lowest 1mm gap on my tester at atmospheric pressure).

So I bought a pair of high-power Trispark coils and fitted them. Now the spark is jumping 5mm easy so, after some rough calculations, I opened the plug gaps to 0.35 for a bigger spark and refitted everything.

Bingo! Whilst she is still a little challenging to start cold (I am told this is not unusual but I may experiment with the enrichment jet sizing in future), she now starts warm very easily and 1st time, every time! I only have to tickle the kickstart now