Search found 34 matches

by jhoexp
Jun 10 2021 5:39am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

Has anyone got this set up and running in there conversions yet ? Haven't seen many video's or complete builds beside the one posted here on endless sphere and what controllers is everyone using, QS suggest Votel EM 200 Considering this in my next build in a 125 motor cross bike. Cheers I just comp...
by jhoexp
May 31 2021 3:48pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 157
Views: 9232

Re: Yamaha YZF250F

It's starting to look properly cool! :thumb: What are they made of, 6082? Are they relatively "easy" to tig weld and what is the filler material used?
by jhoexp
May 12 2021 1:12am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

Thanks! That’s helpful. So what sort of RPM range should I be working to with these motors? More like 4,000? I think you can go much higher, depends on the voltage you want to use and the controller field weakening. If you search for j bjork ktm build, he reached 7000rpm or more, if I remember corr...
by jhoexp
May 11 2021 5:23am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

Just FYI I have had a batch of 520 12T sprockets made up for the 17mm/14mm shaft for the QS138V3 motor. Anybody with a complete or near complete project want to test them, send me a PM. 20210501_104544[1].jpg Is the 12z the largest one in 520 size that can fit? (without cutting the case, I assume) ...
by jhoexp
May 11 2021 5:10am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

Greggio_f wrote:
May 09 2021 6:58pm
So what are people’s recommendations for the front and rear sprocket ratios for this motor with the built-in gear reduction?

Am I correct that QS says 1:3?
It's 1:2.35
by jhoexp
Apr 25 2021 1:13pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 157
Views: 9232

Re: Yamaha YZF250F

What kind of cad are you using? I recommend Fusion 360 (free for personal use) to make this kind of sketches (that you can easely transform in 3d plates). It's easier to use than any traditional 2d cad as autocad, you will learn the basics in a few hours with the tutorials. And the basics are all yo...
by jhoexp
Apr 15 2021 1:01pm
Forum: EScooter/EMotorcycle Build Threads
Topic: 2017 Honda CR250R to Electric
Replies: 36
Views: 3148

Re: 2017 Honda CR250R to Electric

More please! A video will be great!

Are you using a 428 chain, right? how is it holding up?
by jhoexp
Apr 14 2021 6:39am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 157
Views: 9232

Re: Yamaha YZF250F

That is just some pre production rendering that is on their website, it is not the same as the production motor. :lol: I am sure these are not renderings, but pictures (in low resolution and probably some cutting/mask) of the real thing. They are certainly not that good in making a surface reflecti...
by jhoexp
Apr 14 2021 3:26am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 157
Views: 9232

Re: Yamaha YZF250F

Looking at the pictures they have on their website, it seems the problem was there already!

http://www.cnqsmotor.com/en/article_rea ... r/875.html
Image
by jhoexp
Apr 13 2021 2:14pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 157
Views: 9232

Re: Yamaha YZF250F

The middle section should have been flipped 180 degrees. To fix this the motor would have to be rewound. Is this for real?! I think you are right, they have flipped the finned case. If it was placed correctly there will be room for the bolts and the finned part would be in the right place. Good luc...
by jhoexp
Apr 11 2021 11:45am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

Mine is this one from Amazon:
https://www.amazon.it/gp/product/B077XT ... =UTF8&th=1

It fits ok, a bit loose but not too much.
by jhoexp
Apr 11 2021 3:54am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 157
Views: 9232

Re: Yamaha YZF250F

I think the motor are about the same size? The zero motor can probably handle more though. I also plan to push 40+ kW :wink: Oh, sorry, I forgot you are going with the misterious QS180, I was thinking about the 138! Sure this setup should be easy capable ok 40+ kW peak and probably 20 kW continous,...
by jhoexp
Apr 10 2021 6:04am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 157
Views: 9232

Re: Yamaha YZF250F

I slept on it, then I pushed the button. That led to that they had time to go on vacation, so it will take an extra week before I get it. I wonder if anyone is interested in my long rant about controller anxiety, but here it is for the interested to read :? I can relate! I went for a sevcon gen4 si...
by jhoexp
Mar 22 2021 1:11pm
Forum: EScooters/EMotorcycles
Topic: 260v Dirt Bike 2021
Replies: 37
Views: 1394

Re: 260v Dirt Bike 2021

Europe seems very expensive, I'm lucky living close to the USA. It's more complicated than that... I have been in the US many times in the last 15 years, but still amazed every time by the profound differences that I see. Sure the automotive market is a complete different animal for numbers, segmen...
by jhoexp
Mar 22 2021 12:55pm
Forum: EScooters/EMotorcycles
Topic: 260v Dirt Bike 2021
Replies: 37
Views: 1394

Re: 260v Dirt Bike 2021

How about Fiat 500e parts? I used to see lots of those things around here but not so many lately. I suspect they all failed. We don't have it here. That was a compliance car built in the US and sold only in California and Oregon. Fiat CEO Marchionne said he was loosing money (like 14000$) every car...
by jhoexp
Mar 21 2021 4:42am
Forum: EScooter/EMotorcycle Build Threads
Topic: MH RYZ (derbi 50cc)
Replies: 45
Views: 2093

Re: MH RYZ (derbi 50cc)

guiga wrote:
Mar 20 2021 1:12pm
Got 200+2 cells for 990,79eur with postage for a 20s10p (2880w nominal)
Just less than 5 euro each cell, that makes almost 350 euros per kWh. Pretty expensive!

I was considering buying 300 Samsung INR21700-50G for 4 euros each. That would be less than 230 euros per kWh.
by jhoexp
Mar 21 2021 4:32am
Forum: EScooters/EMotorcycles
Topic: 260v Dirt Bike 2021
Replies: 37
Views: 1394

Re: 260v Dirt Bike 2021

Buy a Gen3 Toyota Prius transmission for the princely sum of $75USD and remove the MG2 motor. Purchase a Chevy Volt inverter, prices start at $30 from US based Auto part dismantlers. They must be insanely popular there to have these prices! Prius here (Italy) were rare 10 years ago, and even more n...
by jhoexp
Mar 20 2021 3:31am
Forum: EScooter/EMotorcycle Build Threads
Topic: 2017 Honda CR250R to Electric
Replies: 36
Views: 3148

Re: 2017 Honda CR250R to Electric

Great bilt! Without the rear side panels/exhaust covers looks great, like it was meant to be electrified! Did you cut them or are they just bolted on? I am going with the same motor, and designed almost the same bracket as you, but for an older Husqvarna Te-250. Will your high discharge, but small, ...
by jhoexp
Mar 15 2021 6:52pm
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

OK how about "better" for long steep hills & heavy loads at low speeds. Very slow top speeds. Yes, exactly. It sure depends mostly on what use you want to make of it. More mass means slower to overheat in that context? I think you can say so, probably not much of a problem in most use...
by jhoexp
Mar 15 2021 5:07pm
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

john61ct wrote:
Mar 15 2021 4:14pm
Is a "higher" magnet always better, as in stronger more powerful?

Only downside being maybe heavier?
It's not "higher" it's just longer. It is not necessarly "better" than the shorter one that has a lighter rotor, less inertia, usually higher rpm, etc...
by jhoexp
Mar 09 2021 8:34am
Forum: EScooters/EMotorcycles
Topic: 260v Dirt Bike 2021
Replies: 37
Views: 1394

Re: 260v Dirt Bike 2021

cheapcookie wrote:
Mar 09 2021 8:17am
I've found high voltage cycles to be a different beast altogether since riding a zero srf. Worse than crack
Zero srf is not high voltage, just around 100V nominal (28S).
by jhoexp
Mar 08 2021 4:26pm
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

I wonder how sensitive the unit is to other mounting orientations, besides the increased difficulty in draining and re-filling the unit... You are right about the orientation. Are you thinking about using it with the transmission on the right? I am not 100% sure, but considering how the venting sys...
by jhoexp
Mar 07 2021 11:38am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

I had never heard of that term. They are pretty common here in Italy, they were originally intended to move around in the pit areas, but now some even race them on mx or kart track as minimotard. Rather than messing with custom mounts, would it make sense to buy a suitable frame that already fits t...
by jhoexp
Mar 07 2021 11:28am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

Thanks for posting the pictures, Jhoexp! I am curious if the output shaft is the same size as the non-geared qs 138 motor? Have you checked yet? No, unfortunatly it is not. It's a 17mm shaft, the same that pit bikes usually have. I haven't been able to find 520 pinions, in fact I bought a 428 with ...
by jhoexp
Mar 07 2021 11:26am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 84
Views: 4841

Re: QS 138 70H with Gearbox

It will be interesting to see how it holds up when someone starts to push it. I'll try my best :D , but I doubt I will have it ready soon... I think the BESC G4 would be really interesting to try on these motors. 700 phase amps, and was it max 130V? Yes, and there is also the HESC from Hackey, and ...