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Offline newday777

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Which Dyna ignition?
« on: March 23, 2021, 01:33:38 PM »
Which of the Dyna ignition was the bad failure rate model? I've read of failure by some but don't remember which ones....
I've seen a set of nos Dyna S offered and don't want to buy the wrong one. Going on a 74 CB750.
« Last Edit: March 24, 2021, 05:55:54 AM by newday777 »
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline PeWe

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  • Bike almost back to the 70's 2015
Re: Which Dyna ignition?
« Reply #1 on: March 23, 2021, 01:40:46 PM »
It was up here, Scottly know. My Dyna-S newer model than the failing.

http://forums.sohc4.net/index.php?topic=83748.msg2136019.msg#2136019
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline newday777

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  • Posts: 7,160
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: Which Dyna ignition?
« Reply #2 on: March 24, 2021, 05:58:29 AM »
Quote from: PeWe on March 23, 2021, 01:40:46 PM
It was up here, Scottly know. My Dyna-S newer model than the failing.

http://forums.sohc4.net/index.php?topic=83748.msg2136019.msg#2136019

I'm still unclear from that link or your "My Dyna-S newer model than the failing. "
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline PeWe

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  • Posts: 16,464
  • Bike almost back to the 70's 2015
Re: Which Dyna ignition?
« Reply #3 on: March 24, 2021, 07:46:09 AM »
My model was the newer Dyna-S. OK
The previous model reported with a bad batch as I understood it.

Here photo of mine, purchased 2014.


Edit:
I should not buy that old, not cheap kit. It might be faulty.
I guess it can be the failing version.  3ohm coils?

I trust this more.
https://www.ebay.com/itm/Electronic-Ignition-Kit-Honda-CB750-1969-1978-w-5-ohm-Coils-NGK-Resistor-Caps-/184670878776?_trksid=p2349624.m46890.l49292

I paid not much more than $110US + shipping for my last set of Dyna 5ohm coils, eBay USA.

There are kits with Dyna-S and 5 ohm coils (black) on eBay.
Dynoman has too.
« Last Edit: March 24, 2021, 08:38:34 AM by PeWe »
Logged
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 7,160
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: Which Dyna ignition?
« Reply #4 on: March 24, 2021, 10:16:15 AM »
Thanks Per. I thought it was expensive and wasn't sure of it's being one of the possible bad units.
Logged
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A
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