Is my coil suspect?

[Smithy]

Hello again.

Still trying to find the sparks that Ivan lost. My attention turned to the ignition coil as I wanted to make sure I wasn't focussing on the wrong component, i.e. the ECU.

I used a multi-meter to check the resistance values of the coil and all was good, checked continuity of the HT lead itself and then in desperation I connected the coil directly to the battery and grounded the HT lead to the cylinder head. Virtually nothing. No spark jumped the gap to the head.

So have I made yet another mistake or despite good resistance values is my coil useless?

Thanks for your thoughts.

Ian

[Moto63]

"Is my coil suspect?"...... I honestly thought it was only women that had those things fitted. One lives and learns eh 🤣
Name withheld to protect the innocent

[Smithy]

Well to be honest Mick that is how my daughter came to be born...……..

Not innocent so my name is Spartacus.

[Propellor]

Can't help Ian, I'm afraid. I don't even know if these bikes get the ignition power from the battery or direct from a pulse sender, a la xbr.

If you're on Facebook I really would join the RE owners group. There's the inevitable rubbish that will come back, but you'll almost certainly get your answer in amongst it.

[Moto63]

NO.... I'm Spartacus

[iansoady]

Hello again.

Still trying to find the sparks that Ivan lost. My attention turned to the ignition coil as I wanted to make sure I wasn't focussing on the wrong component, i.e. the ECU.

I used a multi-meter to check the resistance values of the coil and all was good, checked continuity of the HT lead itself and then in desperation I connected the coil directly to the battery and grounded the HT lead to the cylinder head. Virtually nothing. No spark jumped the gap to the head.

So have I made yet another mistake or despite good resistance values is my coil useless?

Thanks for your thoughts.

Ian

You'll only get a spark like that at the moment you earth / release the connection (and you should see a small spark at the LT wire). The method is: attach the HT lead to the coil and earth the plug. Connect the live side of the battery to the coil live terminal (remove all other connections first). Attach a wire to the other side of the coil then briefly touch it to earth - this is when you should get a small spark from this wire and a better one at the plug. Of course, as the connection you make with this wire isn't as good as you get with points, and there's no capacitor, the plug spark will be a bit weak.

Thinking about all this makes me wonder whether you could use something like a Boyer Bransden ignition module as the contact breaker replacement is likely to be similar? Which Enfield model is it?

[Smithy]

Hi

Thanks Ian, I do indeed get a very weak spark when I do as you suggest. The Mighty Enfield is a 2016 Classic Chrome Bullet.

I have bought a second hand wiring loom to start again from scratch and eliminate all of my stupid mods. As to whether a Boyer would work I have no idea and I'm not good enough to figure it out. If I plug in the new loom and there is still no spark I think I will get in touch with Rex at Rex's Speed Shop and ask if he has any suggestions.

Thanks guys for the ideas.

I'm Spartacus and so is my wife.

[Moto63]

NOOO...... I am Spartacus 🏹🗡⚔️

[Steve Lake]

speak to boyer brandsen, very approachable, and i've run a B/B regulator/charger on my srx for eons with zero problems.

i was spartacus....

but things got a bit nasty

 so i'm now brutus

[iansoady]

Et tu?

[CrazyFrog]

Et tu?

No, I'm Brutus...

[Propellor]

Et tu?

Mangetout mangetout.