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Thread: BMW R75/5 Rewiring- Motogadget

  1. #1

    BMW R75/5 Rewiring- Motogadget

    Hi All-

    I am in the middle or a total rebuild of a 72 R75/5 LWB, and am hoping some of you can provide some insight regarding the wiring loom.

    The bike is being built to look 100% stock, but will incorporate some sensible upgrades to the electrical system in particular. As I prepare to begin the wiring project, I am contemplating a customized wiring harness to eliminate the maze in the headlight shell. I am very interested in approaching it using a fuse block similar to one made by Motogadget. The concept would be to house the fuse block, etc., in the area of the tool tray and and wire components from there.

    I am hoping others on this forum have done something similar and would be willing to share their expertise and the process followed.

    Thanks in advance for the ideas and suggestions...!


    Tom

  2. #2
    Liaison 20774's Avatar
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    There's a couple of threads in the Similar Threads pane at the bottom of the screen about the Motogadget products...in one, the person filmed it on youtube. Not necessarily your year bike, but there might be some thoughts/ideas to consider.

    Also try using the google site search; go to google and type in the following:

    site:forums.bmwmoa.org motogadget

    Quite a few more discussions.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Registered User
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    here a good resource:

    https://advrider.com/f/threads/motog...review.951914/

    I posted a wiring diagram for my '81 R100GS using all the OEM switch gear

    G
    '81 R80G/S(wp4860 forks, Henderson triple clamp)
    '10 Husaberg FE450, '10KTM 250XC-W
    Past BMWs: '68 R50/2, '77 R80/7, '87 R80GSPD, '76 R60/6, '85 K100RS, '91 R100GS,'87 R100RS

  4. #4
    Rally Rat 1074's Avatar
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    Wiring

    Hopefully, your harness was as original to begin with and not hacked up from a previous owner. As it is installed at the factory it is pretty simple. Especially compared to a /6 or /7 harness. Take a picture before removing it.
    There are two harnessed for the /5, with and without fuses. Just about everyone recommends the fuses.
    With or without fuses the harness is pretty simple and when the wires are routed correctly, are easy to get to and don't look like a big mess! This is really the easy, simple way to go on a /5 to keep from plunging down the rabbit hole. A good recommendation is to paint the inside of the headlight white to make it easier to see everything.
    If by chance the harness has already been butchered then I recommend that you go to the /5 united group (yahoo) and ask for a picture of what it should look like, as I remember seeing one posted there.
    If you replace the handlebar switches be sure to save the grommets where the harnesses go through the headlight as they are no longer available.
    Boxerbruce

  5. #5
    Thank you all for the help! Great suggestions!!

  6. #6
    Registered User Anyname's Avatar
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    I wonder if a wiring diagram or loom from a mono shock airhead would be useful. They have the fuses back near the tool box and few wires in the headlight.
    BMW R bike rider, horizontally opposed to everything...

  7. #7
    Rally Rat 1074's Avatar
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    Wiring

    Quote Originally Posted by Anyname View Post
    I wonder if a wiring diagram or loom from a mono shock airhead would be useful. They have the fuses back near the tool box and few wires in the headlight.
    Not a chance! Think about all the instrument wires and junction for the handlebar wiring.
    Boxerbruce

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