Topic: M unit input/output grounding question

[Blakesblakey]

I have my wiring diagram figured out and found on other posts here to use expandable sheathing and heat shrink tubing for the harness.  My question is what do you guys do for grounding of all the inputs/outputs? From what I see on other installs I don't see many grounds in the under seat tray (which I'll be using to fit the m-unit, r/r, starter solenoid, and shorai battery).  Any pointers/pictures?

[Jnel]

Check out this post.  It may help.

Jnel


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[Jnel]

This too.

http://forums.sohc4.net/index.php?topic=181650.msg2106060.msg#2106060

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[Blakesblakey]

This too.

http://forums.sohc4.net/index.php?topic=181650.msg2106060.msg#2106060

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That's a start thank you! The thing I'm struggling with is finding a decent ground block.. I saw you machined one but I don't have the tools (yet) for that.  I'm thinking of mounting a block with nut rivets to the frame by the coils in the free space between the tank.  Is that a good location or is there better? For the rear ground block I'm still not sure where to mount that,. That under seat tray will be tight with everything in it so I'm trying to limit wires.  I'm assuming if you tap into the main frame that you don't need to run a direct wire to the main ground on the motor mount?  I'm new to DC systems and coming from AC not having direct grounds is messing me up  any areas I should avoid drilling/riveting into the frame structural wise?

[river]

I've seen several people do some sort of grounding strip such as jnel made. Cal was very instrumental in helping me work through my project so I ended up following his suggestion. I drilled into the backbone of the frame (in the tunnel area under the tank) on both sides. Then I installed rivnuts. I bundled all grounds together and ended them right there on both sides. It worked out beautifully. Any grounds from the back of the bike were grounded using the same technique but the location was under the seat and on the frame rail directly below the tool tray (bottom side of that tube I believe) and behind the side cover.

[Blakesblakey]

I've seen several people do some sort of grounding strip such as jnel made. Cal was very instrumental in helping me work through my project so I ended up following his suggestion. I drilled into the backbone of the frame (in the tunnel area under the tank) on both sides. Then I installed rivnuts. I bundled all grounds together and ended them right there on both sides. It worked out beautifully. Any grounds from the back of the bike were grounded using the same technique but the location was under the seat and on the frame rail directly below the tool tray (bottom side of that tube I believe) and behind the side cover.

That’s a great idea thank you!

[Frosty]

If you don't want to fabricate something yourself, maybe try one of these:

https://electricalconnection.com/index.php/product/master-ground-block/

https://ceautoelectricsupply.com/product/12-point-ground-block/