Add a Ground Strap? By randall (Read 1,117 times)

[randall]

Hi, first post here.....

I'm rebuilding the body work on a 2006 Diamo Velux, 150cc GY6, which was not particularly well treated by it's DPO. While I had the body panels off I thought I'd tear into its electrical issues. Nothing too serious, just a lot of nitpicky stuff like remote start not working, bad lamp sockets, etc.

But what I noticed is that there is apparently no ground strap connecting the engine to the frame. Now. I do have a good ground, I measured a healthy 0 ohms between the starter motor bolt and the steering tree, so I'm not complaining. But it must be grounding through the harness. There is a lead from the bat negative terminal to the valve cover bolt, but nothing else. Nothing going to the frame. The whole system seems to tie to that single ground lead, which is not very big.

The only device on the bike that bonds directly to the frame is the radio. They grounded that to the horn mount. Makes me wonder that might be deliberate to keep frame and engine ground separated, for noise maybe? Can't imagine that would be too useful. And I do have good continuity between frame and engine, problem is I don't know where it's coming from! Maybe just the washers on the hanger bushings? So I'm wondering if the safe thing to do is add a good robust strap between the engine and frame. Couldn't hurt, right?

[terrilee]

i am NOT a mech
but
yea id say so.
really, i thought u needed a ground that way
or scoot wouldnt start.



o and hi welcome to the forum

[JR]

Yes most certainly ground the frame to the negative side of the battery along with the engine. Make sure where you ground it that it is clean and paint free.

JR

[randall]

Dec 10, 2012 14:27:37 GMT -6 JR said:

Make sure where you ground it that it is clean and paint free.

JR

Yeah, I'm all over that. Ok, just picked up a fat strap from the tractor store. It'll do the trick I think!

[randall]

Dec 10, 2012 13:03:41 GMT -6 terrilee said:

i thought u needed a ground that way
or scoot wouldnt start.



o and hi welcome to the forum

Thanks for the welcome terrilee! No, you can start these motors on the bench with just a battery. but some bikes may ground ignition via the frame.

This thing has a beefed up electrical system. Needs it for all it's accessories, wiper and washer motors, cd player, cig lighter, etc., all the creature comforts, and there's a good chance I'll be using all of those at once, well maybe. So thus my desire to make sure it's robust and tight. And of course, I may add those neon ground effect lights later. I guess I'd have to buy some hip hop CDs then. And maybe karaoke!

Thanks for the feedback!

[JR]

Hey Randall do you have a owner manual and/or wiring diagram for this scooter?

JR

[randall]

Well, the owners manual is useless, I do have a harness diagram. Can't post it here at the moment as this board doesn't have pic upload for its iPad Proboards app. The admins must have that disabled. When I'm back at my workstation I'll attach it.

[JR]

If it is I'm not aware of it? If you can't use it let me know Randall and I'll get with proboards to see what's up?

Thanks

JR

[randall]

Ah, pic attachment works from my iPhone but not from my iPad 1. Probably since my iPad has no camera.

Here's the harness diagram.

Attachments:

[randall]

And some visual reference helps, right?

Attachments:

[randall]

Cobalt Blue Metallic.......

Attachments:

[JR]

Thanks Randall! Look at the bottom manual I just stumbled into!

thescooterprofessor.proboards.com/index.cgi?action=display&board=5200&thread=774&page=1

[justbuggin2]

you will have to wear sunglasses to look at it in the sun

[alleyoop]

Jr, that is an excellent Service manual for the 157QMJ motor let alone the Trike itself.
Alleyoop

[randall]

Dec 18, 2012 0:03:34 GMT -6 alleyoop said:

Jr, that is an excellent Service manual for the 157QMJ motor let alone the Trike itself.
Alleyoop

Yes, quite good. Everything in that manual (except the rear axle stuff of course, since I don't have the trike version) is applicable to my bike. Thanks for posting it JR! I'll post the owners manual for your doc section when I get a chance too.

I started blogging my Velux restoration project fader8.com/index.php?option=com_content&view=category&id=57:diamo-velux-rebuild&Itemid=180&layout=default for anyone with an interest in these things.