Author Topic: Wanted CB 400 4 coils for an F2 1977  (Read 13978 times)

Offline Ken4004

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #30 on: May 06, 2026, 08:47:12 PM »
I think Dave has pretty much answered you there Ken.

I usually use 7mm PVC cable or Hypalon and abrade/degrease the surface. Hypalon isn't supposed to good for bonding to rigid epoxy but I have abraded it and found it to be OK with the RS adhesive. I don't think the original PVC cable 'bonded' well to the plastic Honda used anyway.

I have found this potting compound on eBay 50 ml so looks like it fits the bill

Offline Oddjob

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #31 on: May 06, 2026, 09:18:19 PM »
As it turns out Ash I looked back at my order from the Green Spark Plug company and it turns out I actually ordered both red and black 7mm PVC HT lead. Not silicone. So hopefully that should work just fine.
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Offline AshimotoK0

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #32 on: May 07, 2026, 12:49:55 PM »
As it turns out Ash I looked back at my order from the Green Spark Plug company and it turns out I actually ordered both red and black 7mm PVC HT lead. Not silicone. So hopefully that should work just fine.

Your idea of turning coils around I think was used by dispatch riders in the 70's Ken. Yea ... I got mine from Green Spark Plug Co. too.
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Oddjob

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #33 on: May 07, 2026, 03:44:41 PM »
Oh, I’ve never heard that before Ash. And here was me thinking I’d invented that mod. Or maybe they copied it off me 😀😀😀
Kids in a the back seat cause accidents.
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Offline Ken4004

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #34 on: May 07, 2026, 04:22:55 PM »
I wouldn't use silicone HT lead on the coil fix as I don't think you would get decent bond with the epoxy.

I only quoted the RS components epoxy as we use it where I work  it has a quoted high dielectric strength ...but you could use another liquid epoxy if it has a decent electrical spec. It's a great general purpose adhesive though and it can be filled with aluminium powder, silica etc for a whole variety of uses.

Hi Ash is this the epoxy you used on your coils ?

Regards Ken

Offline AshimotoK0

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #35 on: May 07, 2026, 05:26:12 PM »
I wouldn't use silicone HT lead on the coil fix as I don't think you would get decent bond with the epoxy.

I only quoted the RS components epoxy as we use it where I work  it has a quoted high dielectric strength ...but you could use another liquid epoxy if it has a decent electrical spec. It's a great general purpose adhesive though and it can be filled with aluminium powder, silica etc for a whole variety of uses.

Hi Ash is this the epoxy you used on your coils ?

Regards Ken

Yes but it's a bit expensive to just do one set of coils plus we use it at work.
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Ken4004

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #36 on: May 07, 2026, 06:53:14 PM »
Hi Ash they are all expensive but as you say  I might use it for other uses in the future, by the way who do you work for and what do you do ?

Offline AshimotoK0

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #37 on: May 07, 2026, 08:14:09 PM »
Hi Ash they are all expensive but as you say  I might use it for other uses in the future, by the way who do you work for and what do you do ?

I am an electronics design engineer for these guys but I only do 1 to 2 days per week now.

https://www.waterhydraulics.co.uk/
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Ken4004

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Re: Wanted CB 400 4 coils for an F2 1977
« Reply #38 on: May 08, 2026, 05:41:00 AM »
Thats interesting work Ash and a bit of a coincidence as I am also a hydraulics engineer myself but now semi retired and working for myself .