Author Topic: [Pic Request] Electrical Box of CB750  (Read 3668 times)

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Offline rebabal

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[Pic Request] Electrical Box of CB750
« on: April 01, 2010, 10:29:56 AM »
Info: 1976 750k with 73-75 wiring harness (PartsNMore)

I'm a visual person, and although these wiring diagrams I'm going through are helping out immensely, I really need pictures from someone with a clean (or clear picture at least) electrical box.  I'm getting kind of frustrated and sad.

I need to compare my wiring with that of someone who's wiring is untouched, preferably someone with the same wiring harness as I have.

If anyone could get some closeups of most of the electrical box wiring I would greatly appreciate it.  I have my engine on a stand and I want to crank it prior to getting my frame painted and the starter solenoid is giving me a headache, among other things.

I love you all.
'90 CB-1 (CB400F)
'76 CB750k - '78 F Brake Conversion
'03 CRF230

Offline andy750

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Re: [Pic Request] Electrical Box of CB750
« Reply #1 on: April 01, 2010, 10:38:32 AM »
Whats the problem exactly? I just installed my partsnmore harness last night on my K4...

Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline rebabal

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Re: [Pic Request] Electrical Box of CB750
« Reply #2 on: April 01, 2010, 10:39:57 AM »
I think I'm just retarded and can never wrap my mind around electrical circuits.

Starter relay , I forgot how it was wired up, as well as a few other things that if I can just take a quick look at how it's supposed to look I can feel more comfortable in trying to crank it rather than crossing my fingers.
'90 CB-1 (CB400F)
'76 CB750k - '78 F Brake Conversion
'03 CRF230

Offline andy750

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Re: [Pic Request] Electrical Box of CB750
« Reply #3 on: April 01, 2010, 10:43:20 AM »
The wires are all colour-coded so just match black-black or red/yellow with red/yellow and its hard to go wrong. Make sure your solenoid is working ok though. If its just clicking then its likely not. Double check the frame earth (the green wire that attaches to the frame is making good contact).

Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline rebabal

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Re: [Pic Request] Electrical Box of CB750
« Reply #4 on: April 01, 2010, 12:32:50 PM »
The engine's not on the frame, it's on an engine stand.  The green ground I've hooked directly to the negative terminal. 

Would you mind taking a quick pic or 12 of your setup for me?
'90 CB-1 (CB400F)
'76 CB750k - '78 F Brake Conversion
'03 CRF230

Offline andy750

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Re: [Pic Request] Electrical Box of CB750
« Reply #5 on: April 01, 2010, 12:34:27 PM »
The engine's not on the frame, it's on an engine stand.  The green ground I've hooked directly to the negative terminal. 

Would you mind taking a quick pic or 12 of your setup for me?

Sure but it will be later tonight.
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline rebabal

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Re: [Pic Request] Electrical Box of CB750
« Reply #6 on: April 01, 2010, 12:36:10 PM »
I love you, thanks man.  I've looked over my wiring diagrams but I just need to see it done so I can just think about it that way.

I hate wiring.
'90 CB-1 (CB400F)
'76 CB750k - '78 F Brake Conversion
'03 CRF230

Offline andy750

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Re: [Pic Request] Electrical Box of CB750
« Reply #7 on: April 02, 2010, 08:13:42 AM »
Not sure how much use this is but...taken last night as I was putting the coils back on...I have a Dyna S ignition which explains the red wire coming from the coils...

New harness fitted to old parts  ;). Missing the red wire going to the solenoid in the first 2 pics (can just see it in the 4th pic).















cheers
Andy

« Last Edit: April 02, 2010, 08:15:41 AM by andy750 »
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline rebabal

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Re: [Pic Request] Electrical Box of CB750
« Reply #8 on: April 02, 2010, 08:17:41 AM »
The two switch wires that go to your coil, I have the yellow/red tracer fine but there's a green/red (i think) wire that's on the coil that's not on the harness... There's a black wire that's next to the yellow/red.

Is this black wire the one I need to hook to the green/red?

Thanks for your pics!
'90 CB-1 (CB400F)
'76 CB750k - '78 F Brake Conversion
'03 CRF230

Offline andy750

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Re: [Pic Request] Electrical Box of CB750
« Reply #9 on: April 02, 2010, 08:33:55 AM »
Not sure about the green-red. On my coils (from a CB900) I have a blue wire (hooks up to blue harness wire), a yellow wire (hooks up to yellow harness wire), and a black/white wire (hooks up to a plug with dyna red wire to hook up to black(I think or is it black/white?) wire from harness.

Maybe someone else with stock coils can chime in. I have a 72 next to this bike and I can check when I get home if no one else chimes in.

edit - isnt the green/red for the horn?

Ok try this - http://www.sohc4.net/index.php?q=node/330

cheers
Andy
« Last Edit: April 02, 2010, 08:40:02 AM by andy750 »
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350