Honda-SOHC

Other Stuff => Misc / Open => Topic started by: AshimotoK0 on June 18, 2016, 12:02:10 PM

Title: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: AshimotoK0 on June 18, 2016, 12:02:10 PM: Promised people about re-furbing these. Still doing the write up. Here is a coil I started with, then after refurb. Then tested and videoed ( see clip). Full details as soon as I have put the relevant photos and shopping list into my description.

UPDATE : IT'S HERE:-

https://www.dropbox.com/s/x0a4fcpmrwm3l19/Ignition%20coil%20fix.doc?dl=0

VIDEO LINK

https://youtu.be/qxWtR_m80Fc

COIL BEFORE

[attachimg=3]

AFTER AND ON TEST

[attachimg=1]

[attachimg=2]
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: Green1 on June 18, 2016, 05:43:27 PM: Thanks for posting Ash I'm still planning to do mine at some point.

Mick
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: JustcallmeMrT on June 19, 2016, 05:53:53 PM: I look forward to the full write up - keen to get my coils sorted!

Sent from my SM-N9005 using Tapatalk
Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: AshimotoK0 on June 19, 2016, 06:10:39 PM: Quote from: JustcallmeMrT on June 19, 2016, 05:53:53 PM
I look forward to the full write up - keen to get my coils sorted!

Sent from my SM-N9005 using Tapatalk

I will email you a draft .. please PM your email address. You will need to buy some HT cable ...I will look up a suitable type.
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: RGP750 on June 19, 2016, 06:35:42 PM: crickey Ash I can see why you are known as the mad scientist ;D ;D Love the background music.
I'll add mine to the "to do" list when i know what to do.
Thanks for your help (again)
Oh and thanks for the rubbers, perfect.
Rich
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: JustcallmeMrT on June 19, 2016, 07:05:55 PM: Quote from: AshimotoK0 on June 19, 2016, 06:10:39 PM
Quote from: JustcallmeMrT on June 19, 2016, 05:53:53 PM
I look forward to the full write up - keen to get my coils sorted!

Sent from my SM-N9005 using Tapatalk

I will email you a draft .. please PM your email address. You will need to buy some HT cable ...I will look up a suitable type.
PM sent

Sent from my SM-N9005 using Tapatalk
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: UK Pete on June 19, 2016, 08:51:18 PM: It was a mash it was a monster mash
LOL
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: hairygit on June 19, 2016, 10:07:15 PM: Quote from: UK Pete on June 19, 2016, 08:51:18 PM
It was a mash it was a monster mash
LOL
Showing your age there Pete! Odd thing is, young'uns like Green1 Mick are just too young to remember
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: Johnwebley on June 19, 2016, 10:36:13 PM: Quote from: UK Pete on June 19, 2016, 08:51:18 PM
It was a mash it was a monster mash
LOL

not Bobby "Boris" Pickett,and the Crypt kickers

my granny told me about them
Title: Re: SOHC COIL REPAIR -- DIY CHEOPO REPLACE HT LEADS
Post by: Green1 on June 19, 2016, 11:44:54 PM: Only 23 years before I was born but I do remember it being played a fair bit on Vinyl
Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: AshimotoK0 on June 19, 2016, 11:57:17 PM: Pete's a young 'un too but a new age hippie now :)
Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: Orcade-Ian on June 20, 2016, 10:49:51 AM: Coincidence - Bobby Boris Picket and the Crypt Kicker Five (Monster Mash) was the answer to a question on Pop Master just now!!

I'd like to sign up for the full unexpurgated version of the coil repair saga (please don't reply to this request Nurse Julie, at my age it's the ignition coils I need to fix 🙈)

Ian
Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: AshimotoK0 on June 20, 2016, 09:19:22 PM: Here is my draft of the write-up as promised to Mr T :D :D GET FIXIN THOSE COILS GUYS

https://www.dropbox.com/s/x0a4fcpmrwm3l19/Ignition%20coil%20fix.doc?dl=0
Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: JustcallmeMrT on June 20, 2016, 09:30:17 PM: Thanks Ash!

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Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: AshimotoK0 on June 21, 2016, 08:18:14 AM: MrT (Roger) ... In the write-up I used 7mm dia HT cable PVC HT cable with multistrand core. Problem is I bought it off eBay a couple of years ago and trying to track down the seller. There are loads of sellers but I would like to include the source I used.
Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: JustcallmeMrT on June 21, 2016, 08:24:18 AM: Quote from: AshimotoK0 on June 21, 2016, 08:18:14 AM
MrT (Roger) ... In the write-up I used 7mm dia HT cable PVC HT cable with multistrand core. Problem is I bought it off eBay a couple of years ago and trying to track down the seller. There are loads of sellers but I would like to include the source I used.
I got the same type off of eBay, along with the appropriate ngk resistor caps. I didn't realise about the need for dielectric resin - glad you warned me!

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Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: AshimotoK0 on June 21, 2016, 09:32:41 AM: I have copied the repair procedure in my Dropbox links
Title: Re: SOHC COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS
Post by: AshimotoK0 on June 21, 2016, 11:10:17 AM: Interesting that the Nippon Denso 'twins' coils are mounted to the aluminium frame with slotted type screws not 'JIS 'crossheads' .This was done as standard. Never seen slotted screws used on a Honda before !
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: JustcallmeMrT on June 21, 2016, 12:07:45 PM: Anyone know how much current the stock pair of coils typically draws?

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Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: AshimotoK0 on June 21, 2016, 12:46:31 PM: Quote from: JustcallmeMrT on June 21, 2016, 12:07:45 PM
Anyone know how much current the stock pair of coils typically draws?

Sent from my SM-N9005 using Tapatalk

2.5-> 3 Amps depending on coil temperature
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Seabeowner on June 22, 2016, 11:08:56 AM: Thanks for posting this. Most of us with only one or two (or three) bikes only come to this problem rarely and can make mistakes at the first attempt. The pictures give me the confidence to get on with mine.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: JustcallmeMrT on June 26, 2016, 06:53:33 PM: (http://uploads.tapatalk-cdn.com/20160626/0bdd80e20b81721d6e41860ae9bd3954.jpg)(http://uploads.tapatalk-cdn.com/20160626/0e95bb63359fa379c6b77ff194085fe9.jpg)

Here are a few pics of my coil rebuild. It's not pretty, I've still got to file back the putty but it all worked well - very pleased!
The one word of advice I'd give would be to use blu-tac instead of tape to make the barriers for the resin. The tape allowed quite a bit to ooze out before it set and made quite a mess, however the blu-tac contained it perfectly. It's a bit of a pain to get it all off of the resin before adding the putty but overall the results were well worth the efforts.

Thanks Ash!!

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Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Johnwebley on June 26, 2016, 08:11:03 PM: that looks good,when I replaced my coils I chickened out ,

and got a replacement set,

they look very usable,and as they are hidden under the tank,the finish is not quite so important.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: AshimotoK0 on June 27, 2016, 08:20:50 AM: Great stuff Roger . One trick on the epoxy putty is to mould it to about the correct shape and let it cure for half an hour then moisten a rubber-gloved finger and smooth over the surface. Power file /wet'n'dry then satin paint will sort out aesthetics on yours ( if you are bothered ;)) .

Problem with 'replacement' coils is that if they are used and even off a low mileage bike, the PVC outer of the HT coil will almost certainly be really hard and brittle after 40 years.

Give me a couple of weeks and I can duplicate my tester so you can spark test at full rate, off the bike and give it a 'soak' test ( then pass on to anyone else who wants to use it). All you will need is a battery or 3A power supply, no test gear like I used.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: JustcallmeMrT on June 27, 2016, 10:09:33 AM: Sounds like a plan!

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Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: AshimotoK0 on September 02, 2016, 10:27:05 AM: Just noticed someone is Spain is doing the numbers for the coil leads. Is this Piki on here?

http://www.ebay.co.uk/itm/HONDA-CB750-550-500-400-350-FOUR-COIL-NUMBERS-DECALS-HONDA-FOUR-/201659014611?hash=item2ef3d05dd3:g:kcIAAOSwtnpXnchC
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Nurse Julie on September 02, 2016, 11:30:25 AM: Yes Ash, that is our Piki.........Diego Corral Jimenez. An absolutely delightful man to do business with.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Piki on September 02, 2016, 04:16:43 PM: Quote from: AshimotoK0 on September 02, 2016, 10:27:05 AM
Just noticed someone is Spain is doing the numbers for the coil leads. Is this Piki on here?

http://www.ebay.co.uk/itm/HONDA-CB750-550-500-400-350-FOUR-COIL-NUMBERS-DECALS-HONDA-FOUR-/201659014611?hash=item2ef3d05dd3:g:kcIAAOSwtnpXnchC

Hello there, yes I am!!! If you need one of that, let me know!! Free for you!!
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Piki on September 02, 2016, 04:20:38 PM: Quote from: Piki on September 02, 2016, 04:16:43 PM
Quote from: AshimotoK0 on September 02, 2016, 10:27:05 AM
Just noticed someone is Spain is doing the numbers for the coil leads. Is this Piki on here?

http://www.ebay.co.uk/itm/HONDA-CB750-550-500-400-350-FOUR-COIL-NUMBERS-DECALS-HONDA-FOUR-/201659014611?hash=item2ef3d05dd3:g:kcIAAOSwtnpXnchC

Hello there, yes I am!!! If you need one of that, let me know!! Free for you!!

Hello Julie, you are very great woman, other kit free for you if you are interested on it!!
Let me know!!
Best Regards.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Nurse Julie on September 02, 2016, 06:10:09 PM: Hi Piki.
Yes please, I also need some other bits as well, not free of charge, so I will PM you
xx
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: AshimotoK0 on September 02, 2016, 06:17:43 PM: Quote from: Nurse Julie on September 02, 2016, 06:10:09 PM
Hi Piki.
Yes please, I also need some other bits as well, not free of charge, so I will PM you
xx

Same here Piki ... a few different things I need, that I too want to pay you for, so I will get a list together.

Champion work you are doing BTW :)
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Piki on September 02, 2016, 08:18:07 PM: Perfect, for me is a pleasure. I try to do the best quality with the lowest price possible!
Best Regards.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: MCTID on September 02, 2016, 10:24:14 PM: I got a set of Transfers from PIKI for my CB750 K4. Excellent service and I can recommend highly.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Piki on September 02, 2016, 10:55:14 PM: Quote from: MCTID on September 02, 2016, 10:24:14 PM
I got a set of Transfers from PIKI for my CB750 K4. Excellent service and I can recommend highly.

Thank you my friend.
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Laverda Dave on September 03, 2016, 01:21:48 PM: Hi Piki, I've just order a set of the ignition coil numbers from you via e-bay, thanks for replicating these.
BTW, the centre consol arrived and it's great, I'm in the garage right now fitting it along with the restored clocks whilst it rains outside.
Sad thing is my partner who I am building the bike for failed her motorcycle test yesterday on the very last thing, we are both gutted! She's going to take it again before winter. At least I get to ride 'her' motorcycle a bit even if it is to run it in!
Thanks again for the great service.
Regards
Dave
Title: Re: SOHC IGN COIL REPAIR -- DIY CHEAPO REPLACE HT LEADS Also N.D. HONDA TWINS COILS
Post by: Piki on September 05, 2016, 04:53:46 PM: Quote from: Laverda120 on September 03, 2016, 01:21:48 PM
Hi Piki, I've just order a set of the ignition coil numbers from you via e-bay, thanks for replicating these.
BTW, the centre consol arrived and it's great, I'm in the garage right now fitting it along with the restored clocks whilst it rains outside.
Sad thing is my partner who I am building the bike for failed her motorcycle test yesterday on the very last thing, we are both gutted! She's going to take it again before winter. At least I get to ride 'her' motorcycle a bit even if it is to run it in!
Thanks again for the great service.
Regards
Dave

Thank you for your support my friend!
Best Regards.