Author Topic: Vintage CB750wiring harness working!  (Read 956 times)

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Offline Don R

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Vintage CB750wiring harness working!
« on: October 03, 2012, 08:17:06 PM »
I wired the K0 tonight, the new Vintage CB750 harness worked beautiful. Everything is working, except I haven't started the engine yet. It does bump over with the starter. I got the turn signal switch wrong left and right but they work.
 In the headlight bucket I have the usual extra brown wire and a black/white both from the new harness and a white and yellow/white from the right control. I built it from parts of unknown origin so that's not surprising.

I'm wondering if the extra black/white could be used to jumper out the engine off/on/off switch in case if a failure.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline srbakker

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Re: Vintage CB750wiring harness working!
« Reply #1 on: October 03, 2012, 08:29:00 PM »
Sweet!  You give me hope for my own wiring.

Now, can you send me a detailed series of pictures, with each lead labelled, so that I can copy your work exactly?  ;)
1975 CB750 K5
2007 Triumph Tiger
2007 Triumph Speed Triple
1971 Kawasaki F7 175 Enduro
2000 Honda VFR800 (gone but not forgotten)

Offline Don R

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Re: Vintage CB750wiring harness working!
« Reply #2 on: October 03, 2012, 08:37:58 PM »
Yep, with the exception of the ones mentioned, just match the colors. Picture to follow.
 
I did have a problem with the K0 round brown key switch plug in. The center pin was too big and I had to drill the center of my switches harness. I did purchase an extra  late style plug in case of problems later. The plug in to the charging system doesn't have the lock tab, a cable tie will remedy that also.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Don R

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Re: Vintage CB750wiring harness working!
« Reply #3 on: October 05, 2012, 06:29:41 PM »
hmm, Ok first issue. The Black/White wire from my unknown origin right hand control and the black/White from the new harness are both male bullet connectors. I didn't check my old harness yet to see what it had. Should be easy enough to fix. I would think the wire from hand control would have the female end since it it the power feed to the bl/wh in the harness.
 There are multiple black power taps near the coils so I just plugged the coils into that to hear the engine run. I bought some bullet terminals so it's an easy fix.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline bjbuchanan

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Re: Vintage CB750wiring harness working!
« Reply #4 on: October 05, 2012, 10:48:50 PM »
I accidentally bypassed the kill switch on my 76 by plugging in the coils to that spare black jumper near the coils instead of the black/white.

It was dark so its a little understandable ::)
The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers