4000w Supercharged electric scooter -stopped working..

[Tconnolly]

Hello people at ES, my name is Terry, I am new to this community so pleased to meet you.

I really need your help and advice regarding my 4000w 60V 38Ah electric racing scooter.
It is basically a copy of the ELECTRIC WORKS ROVER as featured on YouTube, called the best scooter in the world.
I purchased it over 6-weeks ago from a site on alibaba called "ETHON BIKE TECHNOLOGY", which was a 1yr good member at the time but is now currently offline, hhmmmm!.

Here is their current website in China: http://www.ethonbike-sz.com/electric_scooter_show66t2.html

Now I bought this scooter because we have private open land, also the specifications sounded fantastic, 60V 38Ah battery with huge speed and mileage. The company has an individual website in Shenzhen China and Germany which made me confident it would be a decent purchase.
The total price + shipping was $2781.
Finally last week I recieve it, it's speed was sufficient, mileage was great everything seemed fine.
It came complete with voltmeter showing 65V when full and 55V when needing a recharge.
But after only a few days the trouble started, when I turned the handle bars left the voltmeter reading would drop drastically down cutting off power, only upon straightening the handle bar or turning it right would the voltage meter number rise back up again!.
Now it will not run at all, when I turn the key in the ignition and twist the throttle it jerks momentarily then completely stops, no further turning of the throttle does anything, not until i turn it off then back on again does it do exactly the same thing -jolts then stops completely.
I have tried to upload pictures but cannot do it.
So, what am I looking at?, BMS issue, faulty controller?, loose wire?, please help.

https://m.youtube.com/watch?v=451Stjn0Qyg

https://m.youtube.com/watch?v=XSmbuL4PDM8

https://m.youtube.com/watch?v=_bnNdeCwGwE

 

[amberwolf]

Well, whether the new problem is separate or not, couldn't say, but there is an obvious problem you already found that would need to be fixed, most likely with the wiring or connectors leading up to the handlebars. Go thru all that first, very carefully, and document whatever you find, with pics if possible, so you can tell the company about it and see what warranty repairs they will pay for, or if they tell you to repair it and assure you it will not void the warranty for you to do so.

Or if you don't care about warranties then just fix what you find (but I'd document it anyway).


If fixing those issues doesn't fix the new problem, then there's more troulbeshooting to be done.

If you find no problems in the wiring or connectors, then it's probably just hidden deeper than you are looking.


Regarding adding pictures, there's a thread at the top of every forum list by that name that will show you several ways to do that.

 

[nutnspecial]

Welcome, wow that thing goes pretty good! I'm guessing that's not your vid/ you riding it though?? Regardless, a short vid of the symptoms and the wire routing around the steerer could be really helpful. Pictures would be better than nothing, you could use one of those sites like photobucket.

Otherwise I'd just suggest to attempt attainment of a wiring diagram and plug pinouts and then start looking@/testing power wiring and connectors on and around the steerer.

 

[Tconnolly]

When I turn it left or straighten handle bars it jolts by itself, without even twisting throttle it does this.

 

[amberwolf]

Then fix that first, and in the process you'll probably fix the other issue(s).


It's probably something in the wiring loom that is too short, and so it's now pulled loose and the wires have broken insulation, and touch something they shouldn't, or each other, when the bars are turned.

Alternately, they could be pinched in something mechanically, and cut thru by it, shorting them out or opening htem up.


You'll either have to get the company to take the scooter back for warranty work, or take it apart yourself and document everything, taking lots of good in-focus close-up pictures, and post them up here, for us to help you figure out what is wrong.

If you do the work yourself, you may also need a multimeter to check wires for opens or shorts.

 

[Tconnolly]

How do I go about checking scooter with multimeter?. do I check each wire and remember it's current or voltage reading ?