Author Topic: Wiring harness from scratch?  (Read 1319 times)

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Offline going4speed

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Wiring harness from scratch?
« on: September 30, 2010, 12:33:08 PM »
Any one built a wire harness from scratch for a cb750k?

Where did you get your supplies?

Have any pictures?

Offline flybox1

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Re: Wiring harness from scratch?
« Reply #1 on: September 30, 2010, 12:41:19 PM »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline ksmith0034

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Re: Wiring harness from scratch?
« Reply #2 on: September 30, 2010, 01:32:43 PM »
It took 10 years but she's finally done!
             ↓   ↓   ↓   ↓   ↓
Stocker 2 Rocker CAFE conversion

My YouTube channel HERE:
https://www.youtube.com/MotoCafeRacer

Offline cookindaddy

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Re: Wiring harness from scratch?
« Reply #3 on: September 30, 2010, 01:57:12 PM »
You didn't say what year (the partsnmore one is only for 73-75)

Complete harnesses from stripped bikes for a specific model and year are usually available on Ebay and the like for much less but you never know what condition you are going to get.

I found that I got good results by fixing up the one that I had.

New connectors and housings may be got at:

www.vintageconnections.com

Watch the housings. The lock tab is on the ones I got were the opposite to those used on my bike (78 750K)

Depending on what the PO did to yours, various techniques to repair might make sense, or not. What is the problem(s) that you are having? Making a new harness might make sense for a heavily modified frame but if not, why embark on something that could be quite complex?

Are you comfortable with electrics and the techniques used?
George with a black 78 CB750K (in Lion's Head, Ontario, Canada)

Offline going4speed

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Re: Wiring harness from scratch?
« Reply #4 on: October 11, 2010, 05:19:57 PM »
I did custom harness building for CAT so I can handle that.  I have a new job now and dont have access to the tools unfortunately.

I wanted to build a new harness mostly as I do not trust the nearly 40 year old wire.

I really want a stripped down version but I also realize that they dont put any extra into the harness unless needed.

The installation really needs a tidy up in my mind.

Offline mystic_1

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Re: Wiring harness from scratch?
« Reply #5 on: October 11, 2010, 08:01:46 PM »
Check out the following epic thread by JohnK6, right here on SOHC4.net:

how to save a cb750 from the garbage dump

This is the thread that led me to this site originally.  Here's a nice quote:

Jesus, now he's making his own wiring loom. My brain's hurting with the intensity of it all. What a guy. ;D

Harness rebuild starts on page 3:

http://forums.sohc4.net/index.php?topic=13258.msg130012#msg130012



mystic_1
"A ship in harbor is safe, but that is not what ships are built for."
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My build thread:  http://forums.sohc4.net/index.php?topic=68952.0

Offline going4speed

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Re: Wiring harness from scratch?
« Reply #6 on: October 12, 2010, 05:01:15 AM »
Awesome Mystic thanks.

Oh and its a 1974 CB  :P

Offline KRONUS0100

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Re: Wiring harness from scratch?
« Reply #7 on: October 12, 2010, 06:27:17 AM »
my cb750f been rewired so many times.starting and charging now on seperate circuit....ignition on seperate circuit....and lights are on seperate circuit.....it may as well beeen built from scratch.
MATT
current bikes:  1976 CB750F, 1981 GS1100E
bikes owned:1981 GL1100I, 1990 GS500E, 1981 GS850, 1977 and 1979 GS750, 1974 CB750, 1975 CB750, and a 1982 GS750E