Last nights friend have me a brand new silicone lead kit so I could cut them to fit my nc30, problem lies in that the leads he gave me are silicone and not copper cored like standard leads.

Are the modern silicone leads compatible with our old coil/ht ignition ?

have a read here Royst

http://www.accessnorton.com/silicon-lea ... 12638.html

Hi, I'm running silicone leads on the front cylinders mainly because the original ones were cracked and I had some new car ones kicking about, which also have plug hole covers so they don't get full a crap. Only problem was mine leads were slightly larger diameter than original ones but with a bit of buggering about went in ok, just make sure the graphite core makes good contact with coil.
Never had a problem with them.
Cheers
Ian

Does anyone know apart from that little O ring, what's to stop the HT leads pulling out of the coil caps?

Thinks that's it, it squashes into the cable when you tighten the cap onto the coils, Tho from past experience sometimes I've seen them glued in as well!

Is there not something loosely resembling a drawing pin pushed into the end of the copper only comes out through the plug cap.

Fitted son new NGK leads at the weekend from RO (top bloke!) and the old leads had some sort of rubber glue under the cap to stop them pulling out. The new ones only had an O ring, so given a firm tug they will come out of thew caps so I was slightly concerned.

http://www.ebay.com/itm/CAP-FOR-IGNITIO ... 53f56591d8



What you need is the small rubber part in the pic . It is for 7mm (outer diameter) Ht lead cable just the one our bikes are using.

The cap is useless because it's of larger diameter than the one used in our bikes ignition coils.

Strangely, if you are to use silicon cables, you will not have to glue them on the cable. It stops firmly by itself.

If you are to use normal (not silicone) ht cables, you may have to glue them on.

This is how i made my ht lead cables....

thanks for the link looks like it'll do the job but £9 each for a piece of plastic with a rubber bung is rather steep. Does anyone know of any where maybe cheaper?

You are right....it is VERY expensive, it was just an example to show you what is needed....


Here you go,

http://www.vintagecb750.com/products/5/ ... n-switches

in the middle of the page.

and here....

http://www.mikesxs.net/product/17-6804.html

I do not know if it can go cheaper than this