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Message started by John E Black on 08/21/18 at 09:11:55

Title: M Unit wiring
Post by John E Black on 08/21/18 at 09:11:55

In the middle of a rebuild and would like to replace or at least clean up the stock wiring harness. Anyone have experience using the Motogadget M unit to replace the stock wiring harness?
It looks impressive and is well reviewed, but am sure it has a new issues of its own..
https://www.revzilla.com/motorcycle/motogadget-m-unit-basic-digital-control-and-fuse-box

thanks in advance.
John

Title: Re: M Unit wiring
Post by Serowbot on 08/21/18 at 10:09:45

$300.00 !!!!... :o

Not even on a Vincent... :-/

Title: Re: M Unit wiring
Post by batman on 08/21/18 at 10:38:34

I don't see that this has many advantages, when it comes to lighting, most failures will be a bad bulb ,if you had a turn signal fail , it will trip the circuit , but will not reset until the problem is fixed . How will you tell if it's the front or rear bulb? or if you lost the ground or the positive ,without power to the circuit? you'll end up checking every bulb and every wire,( do you have a lot of time on your hands? do you carry a very complete tool kit on the road?) your turn signals run two different bulbs ,double filament in front ,single in the rear . If your front running lights ,horn and head light fail ,you'll know where to look if you have the stock wiring , they all run on a common ground . This system tells you nothing , and will hamper repairs , costs $300 , and you'll have to completely rewire the bike! The unit states that it can run a warm as 80C that's over 150F ,where are you going to mount it? With all those separate circuits (a massive amount of wires running to it) you'll have a larger,more complicated , wiring harness than before.

Title: Re: M Unit wiring
Post by verslagen1 on 08/21/18 at 11:39:40

I looked at it briefly... finally looked like more complexity ready to fail.

And if it's been anywhere near MegaSh!t it's gonna fail.

Title: Re: M Unit wiring
Post by Armen on 08/21/18 at 18:51:30

Done a few. Very clever system. Like it a lot. On a really primitive bike, it isn't that necessary. Using one on my Savage, did one on an R65 BMW, and my bud is dong one on his CB350. If you go with handlebar microswitches, it really neatens things us. Def use the M-Button up front. It takes all the inputs from the handlebar switches and sends them back to the M unit in a single green wire. You still have a few wires going forward, but the number of wires going back is greatly decreased. Try to mount the M-Button in the handlebar, so that single green wire and a grand lead are all that come out of the handlebar.
I like the later units with multiple aux circuits. Don't know that I need the BlueTooth part.
Very smart device.
There are some great tutorials online to help.
Nice to lose incorporate the fuse panel, relays, etc in one small package.
Again, with handlebar micro switches, you can really tidy up the front of the bike.
Not to mention some very cool programming options.
I'm sure I'll be doing more of them.

Title: Re: M Unit wiring
Post by kojones on 08/22/18 at 01:27:15

I would use a M-unit if the stock wiring harness is falling apart. But it wasn't, so I just replaced the handlebar switches. Cleaned the front end a lot.

Title: Re: M Unit wiring
Post by Tocsik on 08/22/18 at 09:20:10

kojones, what grips are those. They look very comfortable.

Title: Re: M Unit wiring
Post by Gary_in_NJ on 08/22/18 at 09:55:53

714A46564C4E250 wrote:
kojones, what grips are those. They look very comfortable.

Agreed. Info needed.

Title: Re: M Unit wiring
Post by kojones on 08/22/18 at 14:37:37

Biltwell Recoils. And yes, they are very comfortable. And cheap ;D

Title: Re: M Unit wiring
Post by Gary_in_NJ on 08/24/18 at 07:27:18

6763666362697F0C0 wrote:
Biltwell Recoils. And yes, they are very comfortable. And cheap ;D

Thanks. Ordered from Amazon - $17.95 shipped.

Title: Re: M Unit wiring
Post by verslagen1 on 08/24/18 at 08:01:09

The texture doesn't last long, mine are worn off after a years worth of riding.

Title: Re: M Unit wiring
Post by Mjuking on 03/11/20 at 10:19:51

5F6C737B701E0 wrote:

Armen, any chance you've got a wiring diagram i could use for my 87' Savage ?

Title: Re: M Unit wiring
Post by Armen on 03/11/20 at 10:30:42

Are you using stock handlebar switches?
M-Button?

Title: Re: M Unit wiring
Post by Mjuking on 03/11/20 at 10:31:34

06352A2229470 wrote:

Are you using stock handlebar switches?
M-Button?

M-button and M-Switch instead of the stock handlebar switches.

Title: Re: M Unit wiring
Post by Mjuking on 03/11/20 at 10:56:20

im also thinking about using one of these:

https://shop.revivalcycles.com/universal-starter-solenoid-with-main-fuse/

This is my first time doing this kind of electrical work, so i might have gone a bit overboard...

Title: Re: M Unit wiring
Post by Armen on 03/11/20 at 11:42:02

I bought my starter relay from K&L supply. Very simmilar to the Revival one. Smart move!

Title: Re: M Unit wiring
Post by Armen on 03/11/20 at 11:47:48

Wiring is pretty simple.
Run the skinny green wire from the M-Button to the 'Config' termianal.
Outlets leads go the places they are labeled for (L turn, horn, etc).
Connect the tail light and brake light hot leads together.
When you set up the giz, choose 'single tail/brake light'.
Run the rear brake light switch wire to the left side of the M (input side)

Title: Re: M Unit wiring
Post by Mjuking on 03/11/20 at 12:12:13

Okay! thanks!

how do i set up the ignition system with the m-unit (key, startbutton etc.)?

Title: Re: M Unit wiring
Post by Armen on 03/11/20 at 14:04:53

Have you read the instructions? Watched the set-up vid on Revival Cycle site?

Title: Re: M Unit wiring
Post by Mjuking on 03/11/20 at 20:58:23

yeah, i have watched all the videos and read the instructions, but i cant figure out how to set up the reg/rec, decomp controller and ignitor correctly with the m-unit.

Title: Re: M Unit wiring
Post by Armen on 03/12/20 at 05:32:56

Which M do you have? One Aux circuit or two? Mine is the early one with 1 Aux circuit, so I had to make some compromises. I ditched the decompression solenoid circuit. I'll just reach over and hold the lever down when I first hit the starter switch.

Title: Re: M Unit wiring
Post by Armen on 03/12/20 at 06:36:47

Here's a tighter shot of mine. I used a start relay like the one you are looking at. In it is a main fuse.
Battery + goes to start relay.
Fused + goes to the indictated + on the MotoGadget.
Key switch picks up + from same place.
Key then sends signal to other side of gadget.
Only oddness is that the rear brake light switch goes into the brake switch input, because I didn't want to run it into the headlight bucket to the MotoGadget M Button.
I only have the ignition on the 'Aux'. Didn't want some minor electrical problem to knock out the ignition. So, you have to get creative with the lighting. Later systems have 2 Aux circuits, so you can run ignition on one, lights, etc, on the other.
Power from R/R goes into a 'Y' connector with hot from start solenoid. This way, the Gadget is fed from either the battery or the R/R or both.
Ignitor and coil get their juice from the Aux.
Did the combo brake/tail wiring option.
Am I making sense?

Title: Re: M Unit wiring
Post by Mjuking on 03/12/20 at 13:41:56

i got the M-unit blue, so 2 aux.

actually it got me more confused

found these two on Revival Cycles:

https://technicalarticles.revivalcycles.com/hc/en-us/articles/360009106131-m-Unit-Blue-Basic-Universal-Wiring-Diagram

https://technicalarticles.revivalcycles.com/hc/en-us/articles/360016301611-How-to-Integrate-a-CDI-Ignition-with-an-m-Unit

from what i understand there are a couple differences between your way and their diagram.

any pros/cons between your way and the revival diagram?

sorry if my english is bad, Norwegian first time builder with no clue :P

Title: Re: M Unit wiring
Post by Armen on 03/12/20 at 19:32:18

Mjuk,
Mine is the first generation one, you have the newer one. Disregard my stuff. Just follow the instructions of yours.

Title: Re: M Unit wiring
Post by Mjuking on 03/13/20 at 01:44:50

okay!

thanks for helping me! :D

Title: Re: M Unit wiring
Post by ghryx on 06/02/20 at 10:08:32

This is all great stuff - I'm just about to begin wiring up my m-Unit/m-button/switches, and I understand about 90% of what I need to do. The spot that's vexing me a bit is which bits of the ignition system do I keep from stock, and which bits are replaced by the m-Unit? I've looked at the two revival diagrams, and that clears up a lot, but any extra advice would be welcomed.

Title: Re: M Unit wiring
Post by Armen on 06/02/20 at 11:14:15

Hey ghyrx
On mine, I kept the original ignition-coil, crank trigger, and ignition box. I ditched the starter decompression thingie. Wiring between the crank trigger and ignition box is stock. Wiring between box and coil is stock.
I have the early M-Unit with only one Aux outlet. I ran that to the hot side of the coil and ignition box.
Key switch controls the main juice.
On mine, start and kill are the same button. Momentary for start, hold for kill.
Tail and brake are the same wire.

Title: Re: M Unit wiring
Post by LANCER on 06/02/20 at 13:22:57

I need something like this

Title: Re: M Unit wiring
Post by ZSteele on 06/02/20 at 14:04:16

I kept everything including the Decomp circuit. Its doable if you have the order right.

Title: Re: M Unit wiring
Post by ghryx on 06/02/20 at 14:17:38

One other question - with the m.button, the front brake switch is handled via the single green wire to the 'kill' terminal on the m.unit. For the back brake switch, though, will it work to simply run to the 'brake' terminal on the input side of the m.unit? I can't find if there's any weirdness when you use the m.button but still need to use other inputs. My gut says it should work no problem, but can't hurt to check, right? ;)

Title: Re: M Unit wiring
Post by Armen on 06/02/20 at 14:39:04

Not sure which one you have. On mine, using the M-Button, the skinny green wire goes to the 'config' input. The rear brake light switch goes to the brake light input on the left side of the M-Unit.

Title: Re: M Unit wiring
Post by ghryx on 06/02/20 at 16:07:30

I've got the newer one - it goes to the "Kill" input (There's no "config" input anymore) - but that totally answers my question! Thanks!

Title: Re: M Unit wiring
Post by ghryx on 06/18/20 at 09:23:06

ZSteele, how did you manage to keep the decomp circuit? I've been talking with the Revival guys, and they're even a little baffled by it. I'm using an m.button-to-m.unit config to reduce the amount of wiring, but the diagram they sent me has a wire from the start switch going to the decomp controller - and with my new push-buttons and the m.button, I don't have a way to do that now. Very perplexed. How did you wire it in?

I think I understand the rest involving the CDI (which apparently isn't a true CDI. Thanks Suzuki.) tied to the ignition output on the m.unit.

Title: Re: M Unit wiring
Post by ZSteele on 06/18/20 at 14:48:59

http://suzukisavage.com/yabb2.2/Attachments/0714191307_HDR.jpg

This is the wiring diagram I came up with. If I remember correctly I used the same wire colors as the clymer manual. Only thing weird is I ditched the fuses from the stock setup and I'm running a starter solenoid with built in fuses from Revival. Lmk if anything looks wonky and I need to go back and explain what I did.

Title: Re: M Unit wiring
Post by ZSteele on 06/18/20 at 14:51:20

Looking at it real quickly I did start switch to decomp and it's spliced off to the starter solenoid. That line is coming from the m.unit itself and I'm not sure how you would wire this without a button dedicated to starting the bike. Can you explain your handlebar setup?

Title: Re: M Unit wiring
Post by ghryx on 06/18/20 at 15:02:34

I'm using five momentary-on buttons in place of all the old OEM analog switches. I -think- the wiring diagram you sketched up is pretty close to what I've figured out based on what the Revival guys sent me. I just shot this back to them to see what they think.

Ignore some of the greyed-out stuff on it and rogue wires that seem to go nowhere, I just wanted to get the signal flow figured out and then worry about how the safety stuff interacts after.

Title: Re: M Unit wiring
Post by ZSteele on 06/18/20 at 16:45:07

Are you using their starter solenoid or the stocker? If you're using theirs my drawing has the wires in the same location as their diagrams. I dont remember which terminals are which numbers but if you just side by side theirs with mine it'll line up.

Also the green wire with x's coming from the solenoid on my diagram is null. Disregard it!

Title: Re: M Unit wiring
Post by ghryx on 06/18/20 at 18:34:27

Cool, thanks!
Yeah, I'm using their solenoid. So you didn't use the 'ignition' out terminal on the m.unit then, just the aux1? Interesting. I'll start mucking about with this tomorrow.

Very much appreciated. 8-)

Title: Re: M Unit wiring
Post by ghryx on 06/18/20 at 18:47:42

Oh - one other question - you have just one green coming from "Start" - when I first was looking at other diagrams they had two leads coming from both "Start" terminals and spliced together before heading to the clutch/decomp controller - our bikes don't need that much juice, correct?

Title: Re: M Unit wiring
Post by ZSteele on 06/18/20 at 20:33:08

I cant remember exactly what the m.unit uses ignition for but I found that using start was fine and the thing I missed the first time around was getting constant power to the ignitor box.

Correct, only one wire.

Title: Re: M Unit wiring
Post by ZSteele on 06/18/20 at 20:38:18

Just checked out the manual and it looks like the correct way to run things is plugging the ignitor into ignition. Only difference is the aux2 puts out 20 amps versus the ignitions 10a. I'd switch it to ignition if it works, I'll try that on my setup when I get around to working on it again. In any case the 20a ran fine.