Rebuild electrical hardness with M-unit

  • gordone
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Rebuild electrical hardness with M-unit

25 Sep 2024 05:20
#904592
I`m considering rebuild my whole  electrical hardness and use a M-unit and a new speeso/rpm gauges.
Make it modern and don`t foucs on beeing classic.

Questions pop-up in my head:
1. What cables to use ?
2. What connectors to use ?
3. How to protect the cables a modern way?


 
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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  • Wookie58
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Re: Rebuild electrical hardness with M-unit

25 Sep 2024 05:51 - 25 Sep 2024 05:53
#904593
I`m considering rebuild my whole  electrical hardness and use a M-unit and a new speeso/rpm gauges.
Make it modern and don`t foucs on beeing classic.

Questions pop-up in my head:
1. What cables to use ? Use the calculator in my "elec diagnosis guide" (link in my signature) to ensure correct cable sizing for each circuit and only use "multi-strand" automotive specific cable
2. What connectors to use ? As you are not looking to stay original the choice is infinite, personally I am using "DTM" style weatherproof connectors for pretty much everything
3. How to protect the cables a modern way? You can either use "tape" or sleeving (I will predominantly be using "shrink sleeving" in my build




 
Last edit: 25 Sep 2024 05:53 by Wookie58.

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Re: Rebuild electrical hardness with M-unit

25 Sep 2024 06:19
#904595
I saw some fellows build a new wiring harness at a WSBK race once. They used marine cabling ...

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Re: Rebuild electrical hardness with M-unit

25 Sep 2024 06:26
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I saw some fellows build a new wiring harness at a WSBK race once. They used marine cabling ...
That would work but probably a higher spec and therefore cost (WSKB budgets are eyewatering) than is required for this application, ideally you don't want to "over-do" insulation thickness or you will end up with a loom like "a baby's arm" (just my opinion) 

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Re: Rebuild electrical hardness with M-unit

25 Sep 2024 08:20
#904598
Thank you :)

Is it other thing to consider?

Use different colour on the cable for easier troubleshooting in the future?

Use shoes on all end where you terminate the wire?
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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  • Wookie58
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Re: Rebuild electrical hardness with M-unit

25 Sep 2024 08:42
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Thank you :)

Is it other thing to consider?

Use different colour on the cable for easier troubleshooting in the future? As much as possible try and stick with OE colour coding, it will make diagnosing potential issues easier at a later date

Use shoes on all end where you terminate the wire? Not sure what you mean by this ??

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Re: Rebuild electrical hardness with M-unit

26 Sep 2024 01:22
#904619
 

Like these 
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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Re: Rebuild electrical hardness with M-unit

26 Sep 2024 01:28
#904620
 

Like these 
Sorry still not clear what that is, do you mean were the wires go into the "M" unit ? - if so I would simply twist the end and solder it to prevent fraying 

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Re: Rebuild electrical hardness with M-unit

26 Sep 2024 05:45
#904622
With the M-unit you want to use a special Ferrule Crimper to crimp the ferrules onto the end of the wires.  It gives a much more secure connection. 

Don't take shortcuts.

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Re: Rebuild electrical hardness with M-unit

26 Sep 2024 05:58
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With the M-unit you want to use a special Ferrule Crimper to crimp the ferrules onto the end of the wires.  It gives a much more secure connection. 

Don't take shortcuts.
So does the "M" unit come with ferrules ? (every day's a "school day" )

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Re: Rebuild electrical hardness with M-unit

26 Sep 2024 06:20
#904624
No, I forgot where I purchased my stuff from...  I'll have to look.

But here's a thread where I did the M-unit on a GS750E 

www.caferacer.net/posts/627737/
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Re: Rebuild electrical hardness with M-unit

26 Sep 2024 11:46
#904636
This webpage has helped me in the past.
www.rbracing-rsr.com/wiring_ecu.html

You can try Mouser Norway for supplies
no.mouser.com/
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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