Other Stuff > Desperately Seeking!!
Wanted CB 400 4 coils for an F2 1977
Ken4004:
--- Quote from: Oddjob on May 05, 2026, 07:58:50 PM ---There are 2 ht leads coming out of each coil. 1-4 and 2-3 usually. Now you get a 1m length of ht lead. Do the first connection to say the number 1 lead. You’d normally measure how much of the length you’d need and cut the lead to this length with maybe a bit extra, just in case. Now you’d do the other one, number 4. Again after attaching it you’d measure and cut. The problem being if you get it wrong and you cut it too short you’re going to have to redo that lead. My idea was to do the first connection and then go right to the other end of the 1m lead and use that to connect to number 4. So you’re left with a lead going from number 1 port to number 4 port. Only after you have fitted the coil in place and routed the wires as you want them do you do the cut. One lead is always longer than the other so there is no chance of getting it wrong. Leave each lead a few inches long so you can cut and trim a little as time goes by. It wastes a little of the lead but that’s better than risking cutting too short.
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Hi Odd Job thanks for the clarification I now know exactly what your getting st regards Ken
Oddjob:
Like you, my name is also Ken, just for future reference.
Glad you understand now. Before you cut the leads try a test fit with the leads coming out towards the back of the bike instead of pointing towards the front. I found it cured the arcing problem these leads had due to water ingress, the wind used to force water down the lead and into the coil entrance and also down the rubber collar on the top of the ht cap as this was also facing forward. Never had a misfire in the rain after doing this mod. It did mean though that number 1 lead went to number 4 cylinder but with the wasted spark system Honda used this isn’t a problem.
Ken4004:
Hi Ken
Thanks for your advice can’t wait to get stuck in after my holiday.
Regards Ken
Johnny4428:
--- Quote from: Ken4004 on May 05, 2026, 04:02:02 PM ---
--- Quote from: Johnny4428 on May 05, 2026, 01:13:35 PM ---That’s the same stuff I used to encapsulate new lead join, then reshape to original profile with milliput 2 part putty. Can be sanded and painted too. Yellow leads? Why not, I’ve just ordered blue but don’t even know what colour the bikes going to be yet!😳
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Blue sounds nice as well again matches the stripe on the tank, well I need to make a decision, where did you get your leads from ?
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Hi Ken, ordered ht cable from these guys.
https://www.pedparts.co.uk
AshimotoK0:
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.
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