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Author Topic: HT Leads  (Read 6211 times)

Offline ianmck

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HT Leads
« on: March 13, 2009, 11:59:52 AM »
Hello everyone, is it possible to renew the HT leads only on a CB 750, or any other SOHC, without having to renew the coils, mine are not in the best condition, but dont want to go to the expense of renewing coils as well if poss.
Regards ianmck.
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1977 400/4 supersport.   1973 cb750 K4,

Offline Bryanj

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Re: HT Leads
« Reply #1 on: March 13, 2009, 01:53:15 PM »
There are two ways to re-use yours.
(1) use the NGK screw in straight connector after cutting the leads short. This works but not if its 'issing down!
(2) cut away the coil surround at the ht lead and re-solder new ones in then repair case with epoxy.

You can fit the DOHC coils that have replaceable leads BUT these are a lower Ohm rating for the electronic ignition and as such draw more current so that your charging circuit needs to be top notch plus you need to keep the motor over 3,000 rpm to charge
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Offline SteveD CB500K0

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Re: HT Leads
« Reply #2 on: March 13, 2009, 04:32:41 PM »
As Bryan says (how often do I say that!):

1. Cut them off and screw in new ones (trouble sealing though so possible bad news when it rains)

2. Cut the coils back and solder new wires. Reseal with epoxy. See attachment for details.
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Offline Bryanj

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Re: HT Leads
« Reply #3 on: March 13, 2009, 05:15:21 PM »
Steve, thankyou for those few kind words, i must have been awake earlier than you!
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Offline ianmck

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Re: HT Leads
« Reply #4 on: March 14, 2009, 10:08:24 AM »
Thanks for your help gents, Steve, cant open the attachment you sent, can't figure out why, Regards ianmck
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Offline SteveD CB500K0

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Re: HT Leads
« Reply #5 on: March 14, 2009, 09:00:13 PM »
It's a Word document.

I'll save it as a pdf if you like (but the pictures will probably suffer)

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Offline ianmck

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Re: HT Leads
« Reply #6 on: March 17, 2009, 02:05:37 PM »
Hello Steve, I don't know why but i still can't open the link, if it's no trouble, could you PDF it, and I'll try it that way.
Regards ianmck.
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1977 400/4 supersport.   1973 cb750 K4,

Offline SteveD CB500K0

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Re: HT Leads
« Reply #7 on: March 17, 2009, 02:09:33 PM »
Try this
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Offline ianmck

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Re: HT Leads
« Reply #8 on: March 17, 2009, 06:31:36 PM »
thats worked a treat Steve, thank you very much, I now have the full instructions complete with decent photo's, thanks again.
Regards ianmck.
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