Dead coil


Dead coil

Postby Irishman1 » Mon May 13, 2019 3:32 pm

Well last fall I lost cylinders 2-5 on a long ride. When testing I found my ignitors have given up. I replaced with a used set and she ran great until last weeken on a long ride when I lost cylinders 3-4. I tested the coils first again and found I had all cylinders. Also found a large crack in coil 3-4. Not unusual to have some cracks in the coils without problems but bingo. Ordered a new coil
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ICOA # 6786
Retired, now my job is restoring old hondas!
Bike in the garage right now:
1979 CBX1000 red
1981 CBX1000 prolink
1975 gl1000 blue
1975 gl1000 red
1975 gl1000 sulfur yellow
1975 gl1000 red
1976 gl1000 sulfur yellow
1977 gl1000 black
1977 gl1000 blue
1977 gl1000 black
1978 cb750f super sport
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Re: Dead coil

Postby Gearheadgregg » Mon May 13, 2019 5:33 pm

Good reason to have more than 2 cylinders lol , And nice GL Wing, keep us posted on your fix. Greg
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Re: Dead coil

Postby Irishman1 » Mon May 13, 2019 8:19 pm

Thanks! Here’s a few more. Two cbx’s one 78 cb750f,,and three of my 8-75-gl1000’s,,one 76-gl1000 shown
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Last edited by Irishman1 on Tue May 14, 2019 9:54 pm, edited 1 time in total.
ICOA # 6786
Retired, now my job is restoring old hondas!
Bike in the garage right now:
1979 CBX1000 red
1981 CBX1000 prolink
1975 gl1000 blue
1975 gl1000 red
1975 gl1000 sulfur yellow
1975 gl1000 red
1976 gl1000 sulfur yellow
1977 gl1000 black
1977 gl1000 blue
1977 gl1000 black
1978 cb750f super sport
Irishman1
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Joined: Tue Mar 12, 2013 5:02 pm
Location: Camano island,Wa,USA

Re: Dead coil

Postby daves79x » Tue May 14, 2019 7:18 am

I'm confused - you've lost cylinders 3-4 now? Likely the spark unit again. The crack you notice is quite common and while troubling, is likely not your problem, which it sounds like you've figured out? Nice collection of bikes!!

Dave
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Re: Dead coil

Postby Gearheadgregg » Tue May 14, 2019 4:01 pm

Been riding a GL1500 for 18 years as my daily rider, Bullet proof boxer motor. I put it to the Test all the time :D
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Re: Dead coil

Postby Irishman1 » Tue May 14, 2019 9:29 pm

Yeah Dave, I was sure it would be the used ignitors I installed last winter. But testing with a known coil pack and seeing the crack in the corresponding coil, and it working with the coil pack. It’s the coil. I bet if the 40 honda coils in the 11 running Honda’s right now. I bet half of the coils have cracks with no running problems,,, until they do!
ICOA # 6786
Retired, now my job is restoring old hondas!
Bike in the garage right now:
1979 CBX1000 red
1981 CBX1000 prolink
1975 gl1000 blue
1975 gl1000 red
1975 gl1000 sulfur yellow
1975 gl1000 red
1976 gl1000 sulfur yellow
1977 gl1000 black
1977 gl1000 blue
1977 gl1000 black
1978 cb750f super sport
Irishman1
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Posts: 24
Joined: Tue Mar 12, 2013 5:02 pm
Location: Camano island,Wa,USA

Re: Dead coil

Postby cbxchris » Wed May 15, 2019 5:38 am

I would recommend going for the Dyna system , it does away with the igniter's under theach frame , they areally so troublesome ! ☺
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Re: Dead coil

Postby Irishman1 » Fri May 17, 2019 9:43 pm

EA1FB863-F8F7-4903-99DD-A8E6E60A909A.jpeg
Recieved the new coil yesterday and installed it. Running great so far. I’m sure there’s a replacement for the ignitors in the future for both of my cbx’s but for now she’s up and running.
You do not have the required permissions to view the files attached to this post.
ICOA # 6786
Retired, now my job is restoring old hondas!
Bike in the garage right now:
1979 CBX1000 red
1981 CBX1000 prolink
1975 gl1000 blue
1975 gl1000 red
1975 gl1000 sulfur yellow
1975 gl1000 red
1976 gl1000 sulfur yellow
1977 gl1000 black
1977 gl1000 blue
1977 gl1000 black
1978 cb750f super sport
Irishman1
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Posts: 24
Joined: Tue Mar 12, 2013 5:02 pm
Location: Camano island,Wa,USA

Re: Dead coil

Postby Jeff Bennetts » Sat May 18, 2019 9:54 am

Irishman1 wrote:
EA1FB863-F8F7-4903-99DD-A8E6E60A909A.jpeg
Recieved the new coil yesterday and installed it. Running great so far. I’m sure there’s a replacement for the ignitors in the future for both of my cbx’s but for now she’s up and running.



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