QS205 3000w vs QS205 5000w

[999zip999]

Is it the same size motor as the 50mm with smaller stator and magnets for a 45mm. I need and try to get the information if it's a smaller unit and how much less it might weigh. That 205 50 mm motor is quite heavy for an e-bike.
Both have 150mm dropouts ? Same shell ?

 

[FlipDowney]

I see what you mean. So if you are running 80 amps what phase amps are you running? And what throttle settings? I am running 85amps and have little torque off the line. Im thinking its the throttle settings.

 

[Theodore Voltaire]

I see what you mean. So if you are running 80 amps what phase amps are you running? And what throttle settings? I am running 85amps and have little torque off the line. Im thinking its the throttle settings.

My Kelly KLS7218S didn't ask about phase amps in the setup, but the maximum rating of the controller is 200 amps. I don't have a way of knowing if it's really pulling that much or not, but I guess we can assume it's not more than that. As far as my throttle settings, the TPS Fwd Map is set at 35, which is the default setting. I think the bigger this number, the farther you have to twist the throttle for full throttle. Another throttle setting is, Accel Rls Time is set to 1. I think this refers to how fast the throttle responds. 1 is the quickest, 5 slowest. My bike accelerates great everywhere except off the line.

 

[FlipDowney]

Ok. Hm... my throttle is not setup to respond fast, all default basically. I notice the torque when im around 18 to 20mph, plenty beyond that point. I think i will set the throttle to be faster but i wonder if it will be jerky at speed if i do.

 

[DogDipstick]

....get a good battery. IF you want to flip the bike with a twist of the throttle off the line.

My bike would rip itself out from under you with 50A. Kelly KEB controller. Now I have it set to 70% battery 90% phase ( I get overcurrent at 100%) and I get peaks of 160A+ off the line... Will straight up rip itself out from under you. Its got enuf tork to pull you off the back at 25-30mph. Its scary when it surges ahead on full t6hrottle. I use a KEB72450.

 

[999zip999]

Theodore was kind enough to let me jump in this thread.
So I was looking at the qs 2,000 watt 45mm motor v3 3t curve magnets and the same size wire coming out as the 50 mm. It's built in the 50mm shell and 150mm axle. It only saves 0.5kg so only 1lb. Saving. And 40 USD less.
Want I was looking for was a better mxus 3,000w v3 3t . Battery 72v20ah at 80 amp with a 26in rim and maybe a rear disc adapter. But regen only left brake and disc brake front. I say this as starting rim brakes.
So a 205 big shell to save a 1lb. and 40usd for to have it 45mm and that big shell or a heavy 50mm is Big and heavy. ???
The mxus 3,000is more money also. ???

 

[999zip999]

I mean I'm only getting or saving a 1lb. From a 50mm versus a 45mm 2,,000watt 205 motor. I don't want more weight but it's just a pound. This is for a giant MTB colmoly frame.
Yes it must have look of a mountain bike and not a motorcycle or a frakencycle.
Maybe just stay with mxus 3,000 I'm need to check it's weight. But it may cost more then a QS 2,000.

 

[FlipDowney]

I think with a 3kw motor rather than 6kw i could supply the power to be quicker off the line. This setup is great but not lots if torque off the line set to 80A bat and 220 phase

 

[999zip999]

The confusion is
mxus 3,000 45mm
QS. 2,000 45mm with bigger phase wires
QS 3,000 50mm only 1lb heavier
I somehow believe the 2,000 QS motor as a v3 3t may be a better quality motor with more power then the mxus 3,000 both 45mm . I will just have to spread the rear triangle to 150 does that mean I can put a 7-speed frewheel on there ?
Or what's the smallest single speed 11 tooth or 12 tooth.

 

[999zip999]

Somebody help me with my query I want a mxus 3,000 v3 3t. But think that QS has a better quality motor as a 2,000w 45mm in a 3,000 w shell 150mm drop out.
It might be cheaper or the same price.
Please does anyone have an opinion.

 

[Eastwood]

Somebody help me with my query I want a mxus 3,000 v3 3t. But think that QS has a better quality motor as a 2,000w 45mm in a 3,000 w shell 150mm drop out.
It might be cheaper or the same price.
Please does anyone have an opinion.

I had great experience with the mxus 3k 5T.
It seems that people on this site are a critical of the Mxus quality but I never had issues, I really liked that motor. I used the mxus 3K on a mountain bike frame and my enduro clone frame. Only used it on the clone frame for a short period and then I bought the QS205 to be able to run more power.

I did upgrade the phase wires on the mxus 3K and added a thermal resistor to keep an eye on the temps. I was able to run 80a dc and 200a phase, but had to keep an eye on the temps with off-road or constant stop and go in traffic while going full throttle.

The confusion is
mxus 3,000 45mm
QS. 2,000 45mm with bigger phase wires
QS 3,000 50mm only 1lb heavier
I somehow believe the 2,000 QS motor as a v3 3t may be a better quality motor with more power then the mxus 3,000 both 45mm . I will just have to spread the rear triangle to 150 does that mean I can put a 7-speed frewheel on there ?
Or what's the smallest single speed 11 tooth or 12 tooth.

I don’t think you can fit a 7 speed with the 150mm as you would need extra spacers, which would make the dropout even wider.

 

[999zip999]

Thank you

 

[999zip999]

The QS 3,000 and 2,000 are just 1lb. different and little more money $ and same shell at 150mm and nobody has bought one. It's going in a chromoly mountain bike frame an old giant. So 150 mm is no problem.
But I feel foolish for not filling up the shell with more magnets in a fatter stator.
It doesn't seem a smart move just to save 1 lb.
I'm going to check the specs on both weights of b motors the 2000 and the mxus 3000.
So a QS 3,000 v3 3t in a mtb frame ??? @ 72v 80amp.
It weighs 7 lbs more then mxus.
I need to get my cyc pro gen 2 working first with it's shittly back 855 bt controller .

 

[Eastwood]

So a QS 3,000 v3 3t in a mtb frame ??? @ 72v 80amp.
It weighs 7 lbs more than mxus.

I personally wouldn’t put the QS 205 in any mountain bike frame, it’s way too heavy. Unless it had a custom swingarm/chainstay they could handle the extra weight.

Also note the mxus 3K is 142mm dropout

I remember when I went from the mxus 3K in my stealth bomber clone frame, and then switched to the QS205 I could feel a tremendous amount more upspring off road when hitting roots, rocks, etc.

I think the mxus 3K is more suited for an actual mountain bike frame. Comparing it to the QS 2000 or 3000.

 

[999zip999]

Lol yes I just upgrade the phases wires after the axle.
Now to find a good vendor. Maybe just Mxus the company.
Thank you as I thought the qs205 to be a monster, but a good monster .
Thank you very much for your help because I was losing my focus. Plus I have to go true stealth. And No franken bikes.
Sorry I was lusting for power

 

[DogDipstick]

When I weighed it with my bathroom scale I got 29 lbs. QS says 13.45 kgs = 29.65 lbs

My motor on my bike is 31lbs. Dead on. On my scale. As weighed by me. Motor alone. Sold as a QS V3 4T. 479$ shipped 2021.

More than what the ad said.... alot more really. Almost 14kG. As weighed by me on a calibrated shipping scale ( 100lb).

They aint the same. NBP vs QS.


These pics are from teh ad I linked earlier. One says 12.8kG and one says 13.35... kG.

The 5kW NBP motor I had i hand last month.. was lighter... than the heavy one.... in the same garage ( that was made by QS, with a QS sticker, and a QS name).

The resellers are not the real QS. You never know what you gonna get. So how muych they weigh? Who gets what? What is what? IF we are gonna get nitty gritty on teh weights ( mass) we gotta weigh the motors on the same scale.. no " guessing" based on " advertisements" and " advertised weights"... We know there is only one real QS motor site that sells QS motors.. all others are resellers who can do what they want ( substitute this or that motor in the listing for sale)... ...

Who is saving a little on the copper?

Money?

I have no idea what is what anymore.

 

[Eastwood]

Sorry I was lusting for power

Lol know the feeling

With running the mxus 3 on a mountain bike frame, you will have really good performance! When I had the set up of the mxus 3k 5T on a light mtb frame it would loop out extremely easy running at 80a-battery 200a-phase. easier than my clone build with pushing 150amps battery because of the weight horsepower ratio.

Here’s the vendor I used, they have the 3T, 4T, 5T

https://www.elecycles.com/mxus-3000w-motor-brushless-electric-bike-rear-hub-motor.html

If I remember correctly, I received the motor in about two weeks, but this was a few years ago.

 

[Eastwood]

My motor on my bike is 31lbs. Dead on. On my scale. As weighed by me. Motor alone. Sold as a QS V3 4T. 479$ shipped 2021.

More than what the ad said.... alot more really. Almost 14kG. As weighed by me on a calibrated shipping scale ( 100lb).

They aint the same. NBP vs QS.


These pics are from teh ad I linked earlier. One says 12.8kG and one says 13.35... kG.

The 5kW NBP motor I had i hand last month.. was lighter... than the heavy one.... in the same garage ( that was made by QS, with a QS sticker, and a QS name).

The resellers are not the real QS. You never know what you gonna get. So how muych they weigh? Who gets what? What is what? IF we are gonna get nitty gritty on teh weights ( mass) we gotta weigh the motors on the same scale.. no " guessing" based on " advertisements" and " advertised weights"... We know there is only one real QS motor site that sells QS motors.. all others are resellers who can do what they want ( substitute this or that motor in the listing for sale)... ...

Who is saving a little on the copper?

Money?

I have no idea what is what anymore.

Yeah my QS 205, from QS motors was heavier than 29 pounds as well.
It weighed 30 pounds exactly.

 

[999zip999]

I have the mxus 3,000w v2 4t now and like it with Lyen 18fet @ only 45amps and like it could be set for 65amp if I was brave enough to resap it I do have the button. But now want mxus v3 3t @ 80amp as I need for backup with bike rims. Need MTB As they are cracking down especially on the surrons. Oh I go for the homeless look. Kool.

 

[amberwolf]

If it's helpful:

The SB Cruiser : Amberwolf's 2WD Heavy Cargo Trike & Dog Carrier

Funny you shoudl say that... :/ Tonight, I had the problem again, while just sitting at the traffic light waiting, the lights went off, then came bakc on, stayed a few seconds, went off, falshed on and off a few times, then went out and stayed out. I tapped and whatnot on various areas I coudl...

www.endless-sphere.com

29.38lbs (minus the few ounces for the missing axle ends and nuts). the stator is 16.8lbs, including the external wiring (which is probably a couple of pounds by itself). the rotor and covers are 12.58lbs, including the single speed freewheel it came to me with. just the rotor and brake-side cover are 11.02lbs, so presumably each cover is about a pound (since a freewheel is probably around half a pound).

 

[Theodore Voltaire]

I don't think my weighing method is accurate enough to make any exact claims. When I weighed my old motor, a 5403 it came up lighter then it was supposed to be also.

 

[Eastwood]

I don't think my weighing method is accurate enough to make any exact claims. When I weighed my old motor, a 5403 it came up lighter then it was supposed to be also.

And even if the in the NBpower motor isn’t authentic QS, I’m sure it will serve you just fine! Either way, I think you’ll be happy with it

Have you begin to lace the motor/rim?
What size rim will you be using? Moto rim?

 

[Theodore Voltaire]

And even if the in the NBpower motor isn’t authentic QS, I’m sure it will serve you just fine! Either way, I think you’ll be happy with it

Have you begin to lace the motor/rim?
What size rim will you be using? Moto rim?

Yes that's already the case. It runs so well I really don't care who made it. My old motor failed last July at about 22,000 miles. It took me till late october to get it back on the road. When the motor went, it took my 9 year old stock controller out with it. I installed an 80 amp Kelly with the new motor. I've almost gone through a rear tire since the rebuild. I'm mainly a street rider. My rims are 24" x 65mm double wall alloy laced with 10g spokes.

 

[Eastwood]

Yes that's already the case. It runs so well I really don't care who made it. My old motor failed last July at about 22,000 miles. It took me till late october to get it back on the road. When the motor went, it took my 9 year old stock controller out with it. I installed an 80 amp Kelly with the new motor. I've almost gone through a rear tire since the rebuild. I'm mainly a street rider. My rims are 24" x 65mm double wall alloy laced with 10g spokes.


View attachment 332166

Oh nice, Looking good my friend! I like the red
So that’s an actual B-52 right?
It looks like you have the same rear shock as my clone without the piggy back reservoir. Definitely better than the DNM

Yeah, and to your point who cares who made the motor as long as it works. It’s not like there’s something extra special with QS.

I wish there was a way to make the QS205 about 10 pounds lighter maybe more aluminum parts but they certainly perform well. They’re just heavy is a bag of bricks lol

 

[999zip999]

Ok contacted Harry SIA and contacted Alan from QS here with a pm.
Harry shipping. 180.00. Alan. 225.00
Motor 2,000 v3. 244.00. 235.00
404.00. 460.95

This is for a bare motor 2,000w 45mm v3 3t
Why two different prices for same motor
I tried Sia first and Harry took six emails and three emails were just about the shipping cost that he wouldn't commit to.
So I asked Alan here on in the spear threw up p.m. and he gave me the second quote I'm supposed to believe it's the same motor with two different prices.
WHY ???