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Author Topic: Power plug in for my electronic ignition  (Read 356 times)

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Offline Dreadnought

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Power plug in for my electronic ignition
« on: April 05, 2023, 08:46:45 AM »
Building a piggy back for electronic ignition. I plan on tapping into the rear brake light for power to my electronic ignition. Any tips on making the plug connector? I plan on using connectors from my old ignition switch.
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Offline calj737

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Re: Power plug in for my electronic ignition
« Reply #1 on: April 05, 2023, 08:58:54 AM »
Why not use the Blk/Wht wire from your RH switch that powers the coils?
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'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline PeWe

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Re: Power plug in for my electronic ignition
« Reply #2 on: April 05, 2023, 09:19:02 AM »
My CB750's have relay for ignition  the black/white wire activate when turning on the switch.
Kill switch will work.
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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 HondaMan

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Re: Power plug in for my electronic ignition
« Reply #3 on: April 05, 2023, 06:19:26 PM »
Quote from: Dreadnought on April 05, 2023, 08:46:45 AM
Building a piggy back for electronic ignition. I plan on tapping into the rear brake light for power to my electronic ignition. Any tips on making the plug connector? I plan on using connectors from my old ignition switch.

You can get new connectors from VintageConnections.com.
Are you planning on killing the Ignition by turning off the headlight?
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See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

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Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
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Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

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Offline newday777

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Re: Power plug in for my electronic ignition
« Reply #4 on: April 06, 2023, 01:00:06 AM »
Quote from: HondaMan on April 05, 2023, 06:19:26 PM
Quote from: Dreadnought on April 05, 2023, 08:46:45 AM
Building a piggy back for electronic ignition. I plan on tapping into the rear brake light for power to my electronic ignition. Any tips on making the plug connector? I plan on using connectors from my old ignition switch.

You can get new connectors from VintageConnections.com.
Are you planning on killing the Ignition by turning off the headlight?
Most use the black power lead at rear brake switch which is on with the Key switch, not the headlight. Correct?
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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, 2 K4, 2 K6, 1 K8
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 newday777

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Re: Power plug in for my electronic ignition
« Reply #5 on: April 06, 2023, 01:06:05 AM »
Quote from: Dreadnought on April 05, 2023, 08:46:45 AM
Building a piggy back for electronic ignition. I plan on tapping into the rear brake light for power to my electronic ignition. Any tips on making the plug connector? I plan on using connectors from my old ignition switch.

This guy shows his pigtail he made up at @ 8 minutes in. With this you can unplug it and put points plate back in if needed

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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, 2 K4, 2 K6, 1 K8
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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