Search found 614 matches

by Dui, ni shuo de dui
Dec 01 2021 9:46pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

I worked mainly on the rear swingarm and the battery box these past days. The bike had a lot of play in the rear swingarm and that bothered me for a very long time. Made the bike slightly unstable while cornering on bad roads, I couldn't feel where the rear wheel was for sure. Basically all the pivo...
by Dui, ni shuo de dui
Dec 01 2021 8:52pm
Forum: EScooters/EMotorcycles
Topic: Optimum Battery set up for my EV scoot Spec?
Replies: 28
Views: 371

Re: Optimum Battery set up for my EV scoot Spec?

So battery Strategy wise I'm thinking 26S10P...LiPol 3.7v, 20C ,6000mAh.. Gone with 1200A -Is that too much?!? I do need to check Controller Spec can handle this.. Think I'm getting the hang of spec'ing the battery now. All learnt from this forum and the comments on the Thread -Cheers :bigthumb: No...
by Dui, ni shuo de dui
Nov 30 2021 4:18am
Forum: EScooters/EMotorcycles
Topic: Optimum Battery set up for my EV scoot Spec?
Replies: 28
Views: 371

Re: Optimum Battery set up for my EV scoot Spec?

I checked out Li-NMC 25Ah-30Ah High Power Pouch Cells which I can get from a local company, so 4 or 5 will get me around 100Ah @ 96v = 9.6kWh... It's now time for a little exercise: Given the examples I showed on my previous post, can you deduct the minimum C-Rating your cells need to match in orde...
by Dui, ni shuo de dui
Nov 30 2021 1:50am
Forum: EScooters/EMotorcycles
Topic: Optimum Battery set up for my EV scoot Spec?
Replies: 28
Views: 371

Re: Optimum Battery set up for my EV scoot Spec?

I need 96V in series and then a given amount of Ah in parallel to gain my range, so its all about how many nmc pouches of cells I can squeeze into my scoot package space and at the same time balancing weight and adequate cooling... Am I on the right track, or completely left field? Yeah, pretty muc...
by Dui, ni shuo de dui
Nov 26 2021 4:41am
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

I know it's a bit late to ask this-but why didn't you reinforce the horrible bends of the lower frame tubes in the front part, as you did it with the other two/four bad bends ??? IMG_20211117_201734.jpg That's because I can't, unfortunately. Otherwise I'll have no way to install the battery box bac...
by Dui, ni shuo de dui
Nov 25 2021 8:47pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 144
Views: 7935

Re: Conversion of a Bultaco Sherpa

The yellow thing looks like a plug - if so, I could unplug it and add double cables after the plug: Do you think this would be possible? Yeah, totally. But if I may, a better way to do it would be to ditch this yellow plug entirely and directly solder your new wires onto the BMS terminals. You just...
by Dui, ni shuo de dui
Nov 24 2021 8:56pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

Good news: the frame is finished, yay! First I went with a few coats of epoxy primer: IMG_20211117_201734.jpg And then a few coats of black. Was supposed to be mate black but in the end it turned out a bit shiny. Not sure why but it's not really an issue, still looks just fine. IMG_20211124_192004.j...
by Dui, ni shuo de dui
Nov 24 2021 8:11pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 144
Views: 7935

Re: Conversion of a Bultaco Sherpa

but also didnt make separate charge and discharge ports (as their offer picture on Alibaba showed it, and I have ordered). So I will have to unplug the battery each time when I want to charge it... In their offer, the battery had a C13 socket for charging, and an Anderson connector on some 10cm cab...
by Dui, ni shuo de dui
Nov 22 2021 8:17pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 144
Views: 7935

Re: Conversion of a Bultaco Sherpa

Thanks for the drawing. The problem is: I dont have this ANT BMS. I have the cheap 65A BMS-thing which the seller put into the battery, and I wanted to test it as it is. In this case I will need the precharge stuff, won't I ? Ah ok, I thought you were buying one. In which case then yes, your drawin...
by Dui, ni shuo de dui
Nov 22 2021 2:51am
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 144
Views: 7935

Re: Conversion of a Bultaco Sherpa

The ANT BMS does have a precharge system, you can even adjust its value in the software. No need to add another one :) I would also ditch the switches, they aren't necessary since the BMS does that already. So Basically I would wire it like that: wer.png The switch I added at the top is the ignition...
by Dui, ni shuo de dui
Nov 15 2021 10:04pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

Thanks @spinningmagnets! Ok so now most of the big works on the frame is done. First, I've finished welding the gussets: IMG_20211111_193728.jpg Then I worked on the bike stand. I'm making more or less the same thing I've done on the red roadster, which is to have the stand directly on the swingarm....
by Dui, ni shuo de dui
Nov 11 2021 10:24am
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

Honestly-I have never seen such a lousily made frame. Even if a Moroccan or Pakistani backyard welder would build a motorbike, it would look much better. I guess it is a good idea to reinforce that... Yeah that's absolutely horrific. I have litterally zero welding experience (learned from youtube v...
by Dui, ni shuo de dui
Nov 11 2021 3:55am
Forum: Large EV General Discussion
Topic: streetlegal crosskart/buggy build 140hp
Replies: 35
Views: 2376

Re: streetlegal crosskart/buggy build 140hp

Awesome build, great skills there!
by Dui, ni shuo de dui
Nov 11 2021 2:00am
Forum: Large EV General Discussion
Topic: Electric Quad ATV
Replies: 6
Views: 1684

Re: Electric Quad ATV

150 A battery might be a little on the weak side for an ATV I think, you should probably aim fo a bit more. Your choice of cells seems like a good one to me, nice capacity and good discharge rate :wink: In case of doubt, it's always better to go for higher discharge rate, your cells will get less st...
by Dui, ni shuo de dui
Nov 10 2021 8:41pm
Forum: EScooter/EMotorcycle Build Threads
Topic: RIPPY SCOOT
Replies: 59
Views: 1925

Re: RIPPY SCOOT

LOL with 65kg of LiPo in the middle of the Scoot and an 8 foot tall Yowie sitting on it and you still think Im going to lock the rear wheel with regen........ :lol: or disc brakes for that matter. This is me before I shaved You sure can! I happen to know, I crashed once because of that. :roll: And ...
by Dui, ni shuo de dui
Nov 10 2021 8:33pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250

Thanks Tyler! I sure don't mind, it's always nice to get some comments, the forum is a bit too quiet usually :wink: 1. How much does it weigh? Do you really need twin front calipers? It always upsets.me when a vehicle has too much braking. Remove 1 caliper and you'll have more power for the other ca...
by Dui, ni shuo de dui
Nov 08 2021 8:58pm
Forum: EScooter/EMotorcycle Build Threads
Topic: RIPPY SCOOT
Replies: 59
Views: 1925

Re: RIPPY SCOOT

Dui Regen is over rated untill you start using it, ALL THE TIME. Regen is the primary service brake and as experienced in my Daihatsu Mira, regen extended range by 22%. If you dont get 22% range extension, youre doing it wrong. Then obviously its over rated. You compare a car and a motorcycle, that...
by Dui, ni shuo de dui
Nov 08 2021 2:20am
Forum: EScooter/EMotorcycle Build Threads
Topic: RIPPY SCOOT
Replies: 59
Views: 1925

Re: RIPPY SCOOT

Rear brake line is piggy backed onto front brake master cylinder so both front and rear brakes are operated by one lever. I really wouldn't do that if I were you. You'll have no way to control the repartition of braking power between front and back, it is likely that too much pressure will be appli...
by Dui, ni shuo de dui
Nov 08 2021 1:57am
Forum: EScooters/EMotorcycles
Topic: Another Emax 110s Lithium upgrade
Replies: 11
Views: 1370

Re: Another Emax 110s Lithium upgrade

Nice battery! The ANT BMS usually comes with a screen which features many things, including a speedometer based on hall sensor input. It can display total voltage, voltage of each individual cell, current consumtion, State of Charge, temperatures, odometer, etc. It's a really nice little thing, pers...
by Dui, ni shuo de dui
Nov 08 2021 1:45am
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

Thanks for the kind words and support guys, much appreciated! This weekend I tried to keep working on the frame. I haven't had the opportunity to work on the frame since I got it, so now was the perfect time to do so. The frame was very poorly done from the factory. Not only the welds are horrific, ...
by Dui, ni shuo de dui
Nov 02 2021 9:02pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 144
Views: 7935

Re: Conversion of a Bultaco Sherpa

What worries me is the cells they are using: if the cells were not sized to deliver the 300A peak then switching to a bigger BMS will not help. Sure the BMS will not cut the power, but the cells will be damaged, resulting in loss of capacity and a quick death. Earlier in the discussion you mentionne...
by Dui, ni shuo de dui
Nov 02 2021 4:34am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17432

Re: Yamaha YZF250F

How did I miss this thread?
Absolutely great job, I love what you've done with the motor brackets and the battery box. Keep up the great work!

:bigthumb:
by Dui, ni shuo de dui
Nov 02 2021 4:13am
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

It looks like you are really trying to fry that poor little motor now :wink: Is there a specific reason why you got an ATP instead of a far driver for example? Haha, yeah. I hope this motor will be able to take it. It was happily running at 510 amps per phase, but 900 amps might be a bit too much. ...
by Dui, ni shuo de dui
Nov 02 2021 1:39am
Forum: EScooter/EMotorcycle Build Threads
Topic: Ninja 250 "Clone" Made in China
Replies: 89
Views: 24514

Re: Ninja 250 "Clone" Made in China

Some more progress: I stripped down the chassis entirely and gave everything a good thorough cleaning: IMG_20211031_190720.jpg Then I started working on relocating the foot pegs a bit higher so they won't keep on rubbing the floor while cornering: IMG_20211102_002856.jpg One is already welded in pla...
by Dui, ni shuo de dui
Nov 01 2021 10:39pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 144
Views: 7935

Re: Conversion of a Bultaco Sherpa

After a lot of writing on Alibaba, the battery seller proposes now to send me another BMS , and instructions how to exchange it. So now it would be highly important to know a good BMS, so that I can tell them what they have to send. Mabye someone can tell an exact brand name / model of a BMS which ...