Trouble with bike

[Oddjob]

He wouldn't be the first to think the left coil supplies the left cylinders and so on. He also won't be the last. Easy mistake to make until you know otherwise. By the temps it's sounding a lot like that's what's happened.

[andy120t]

I've mixed mine up before - made some incredibly loud bangs!

[beardylondon]

I can confirm that the left had side coil is feeding plugs 1 and 4. And the right hand coil is feeding 2 & 3.

However on closer inspection the sparks are ALL yellow in colour, not the normal healthy blue you get. Appears to be weak power from coils?

These are Hendler coils I bought:

https://www.ebay.co.uk/itm/145665457928?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=_roJPpVgT4a&sssrc=4429486&ssuid=wmWanCu3SsS&var=&widget_ver=artemis&media=COPY

[Bryanj]

Low battery will do that

[beardylondon]

Thanks, will double check

Low battery will do that

[Oddjob]

Got to be honest and say I much prefer the standard coils to any others on the market. They seem to last and last and give consistent results. There are loads of spare coils out there, just do the Ash mod on them if the HT leads are suspect. Cheaper and more satisfying to do it that way IMO.

[Oddjob]

Just to be 100% sure, what colour wires are feeding the left hand coil and if you look at the points plate (I know you have electronic but the term still applies) what colour wire is coming off the left hand trigger mechanism.

[beardylondon]

what colour should it be?

[Oddjob]

No set colour as it’s aftermarket, however whatever colour wire comes out of the left sided trigger should also be the same colour wire going to the coil firing 1-4 cylinders.

[beardylondon]

I meant what colour on the bike’s loom, as that is that’s I thought you were asking, not the colour on the coils themselves.

No set colour as it’s aftermarket, however whatever colour wire comes out of the left sided trigger should also be the same colour wire going to the coil firing 1-4 cylinders.

[Oddjob]

Ok, try this, did the electronic ignition come with its own wires, the ones that run under the clutch cover and connect in the rubber boot next to the upper rear engine hanger. If so what does the left hand trigger wire connect to in that boot, the blue or the yellow?

Then check what colour wires the coil running 1-4 cylinders connect to on the loom, again either blue or yellow. That will tell us if it’s been wired correctly

[beardylondon]

No idea, it was installed on the bike when I bought it!

[Oddjob]

All you need to do is remove the points cover and look and report.

[beardylondon]

I’m not currently by the bike, but if you look at page 2 of this thread, there’s a photo of the electronic ignition.

[Bryanj]

I think thats a Dave Silver special