The qs138. 70h can do 20kw I do it all the time, I have about 5 of them. I even have a dirt bike with 2 motors 2 controllers on one jackshaft system pulling about 700nm of tq. I also build my batteries from lipo cells etc..
I have seen all your videos sir , big fan of your works!! Want to ask some questions regarding the qs 138 70h motors - “ 1) do they heat on 1hr driving? 2) is the torque real ? I mean can it put torque enough to pull a 150kg e bike (I’m planning for) 3) i desire a speed of 60kmph only but with wheelie like torque - plz suggest me a motor sir Thanks
@@weareaunit8931 The 70h do get hot, I do believe it is from two factors 1- air flow 2- the overall weight it needs to move. My orange light weight dirt bike uses the 70h and it just gets warm. It has great airflow and very light weight bike. You probably be better off with the 90h version. It has better magnets and can produce more power with less heat. I’m actually putting one in a power wheel and over volting it, making a drift trike out of it.
Good point about making things in America especially in the times like this. It makes no sense that you cant get something like that here in the states. Period!
@@BadFrogg actually look up grin tech a canadian company they do that, its more expensive but they offer added value like higher quality winding, better fixture, integrated splined hub torque arm etc, if you offer better value at the price people will. The chinese one don't last beyond a year, they rust and windings burn out under heavy load. All these hub hotors were designed by australians who setup small plants in china back in 2010 and chinese haven't improved anything on it
@@tallcool1jeff US is still the #2 manufacturer in the world, with 1/4 the population of China. US is less than China, but more than double the #3 country. US typically makes lower quantity, higher cost goods. China does the opposite (high quantity, lost cost). What also might surprise you is that US is #1 in oil production in the world (yes even in 2023). #1-3 are very close in Oil and switch spots occasionally. I don’t get where people get these ideas.
planning an e moto conversion project and the sense i am getting is a hub motor seems easier, but unless you know for a fact that the motor can go in the swing arm without modification it may turn into a huge headache generally you will need to modify your swing arm for the motor axle itself, plus add a new mount for rear brake, and that is a lot of sensitive work that you better be a skilled fabricator for. whereas the mid drive all you have to do is make a mounting plate, which there are many companies online that will cnc cut a plate for relatively cheap, some even provide simple CAD software for you to use
Johnny, great project. If you can mount the sprocket on motor close to swing arm and centered on swing arm it will keep chain as close to same slack through the massive 4 inch rear travel on the swingarm. Welding the brackets to back is worth the time. Find a good welder person that can make and i install rear brackets with motor adjusters for chain tension. This will be a super cool electric retro on an old classic Honda. It will be well worth the cost for a valuable classic "Electrified" by Johnny". The Honda EBJ Retro. Cant wait to see it done.
Dude I feel your pain. I recently recieved a kit from them and I had to make quite a few wiring modifications. The communication has been good for me but there is a lot more hassle that goes into getting their kits to work than their should be. I would way rather pay for American made but there just aren't many options.
I got an 8-12kw v4 hub motor kit from them and one of the hall sensor plugs for the controller and 2 other wires used to get it to spin I had to take off the plugs and solder them together. The display they sent me doesnt fit any of the plugs and the throttle doesnt fit to anything either
Normally the "do it in America" attitude I kinda scoff at saying *we created this outsourcing beast, now we live with it* but I'll be damned, more and more it's turning into *yeah, we probably should recoup our independence on them*. Sadly we waited till we were this deep in a hole to recognize it.
Hello! I love your channel. Thanks for the content man. I was looking for a motor that's about the equivalent (more or less) to a 400cc engine. Can you give me any tips, numbers, companies,etc to look into?
A very rough guide to go by would be up=watts. 750w=1hp approximately. At 7500w peak you would be around 10hp. 15000w would be about 20hp. Closer to 400cc output
Is that the 90h cause if it is it can handle over 32kws of power which would be a bac8000 at like 400a and rediculous phase amps if its the 70h you can handle over 20kw of power with bac4000..... nucular are also a good option 😉 with 100a your not even scratching the surface of what that motor can do (either version can handle 10kw continuous with ease)
Do you have the wiring diagram you used to make ur harness? Or could you document yourself creating it? I’m stuck in the same boat and I cannot find tutorials or guides anywhere :(
How goes the build? I'm planning on doing a conversion on my old Yamaha RS 100 that's been sitting in the shed for years. Planning, won't be able to start til next year. Came looking for inspiration ;)
Generally speaking the perplexing paradox you point out rings true the world over. We have multiple capabilities and existing infrastructures in place to essentially supercharge national economies. Bicycle shortage easily fixed. Electric bikes and vehicles conversion services: solve a shit ton of unemployment and income problems, as well as both diversify existing industries and address the global shortage shenanigans. A good portion of the “tech” needed for this was solved and engineered 50-100 years ago. We don’t need to redesign anything, we just need to change the order of operations. Then again , we could easily solve homelessness but for some reason park benches and tents under bridges are still where it’s at. It’s borderline maddening to see how inefficient humans can sometimes be.
@@JohnnyNerdOut ha! The faster we all accept how irrational the world is the faster we can all get back to sipping cocktails and watching it burn. WORST. SIM. EVER
Couldn’t agree more we should have more domestically made things. It’s time to bring back more manufacturing back to the states. BTW did you ever end up finishing this build? I can’t find anymore videos on it. Great content man!
That's a big chunk of motor, bigger than an alternator in a car. I also think that electrical items should be made here in the U.K. or Europe. We are too dependant on China for almost everything. My communication between Junstar the seller I bought my Bafang kit from on Amazon has been great. In fact one of my hydraulic brake sensors went faulty last week and I sent him a message via Amazon asking for a replacement and he sent 2 new sensors within 1 week. There is a shipping problem world wide due to the pandemic. It is mainly due to the cost of containers which have tripled in price for shipping goods, also there is a staff shortage at ports, so most ships are not being off loaded fully. The bike is coming along great apart from the throttle issue. :)
#irishrover i live in london , and i wasn't sure either i buy the kit from junstar or AliExpress overseas warhouse , after seeing your comment could you please tell me how many weeks until you receive it , and any advice before i buy from this seller on amazon , thank you
I clicked this because i was wanting to see how it ran but, Dude all i seen was talk the whole way thru. When you get it running with vary little talk i would be glad to see what it does.
If you want the best value for your $ build your own battery- the battery cells I chose is Molicel P42A 21700 4200mAh 45A Battery. Has the best performance from what I've been able to research. You'll get about 1300 watts for an hour out of a 10 lb battery pack (80 cells for a 72v 4 parallel 20 series battery that can put out 160 Amps. For your application I would use 3 of them (240 cells) and will cost around $1200
I’ve gotten pretty fast at them to where I can assemble and spot weld them together in about three hours but my first time doing it took a couple of days because I tried to cheap out and solder the batteries together instead of spot welding. I also started my first pack with used 18650 cells but continually had problems so it’s brand new cells from now on- keep in mind lithium ions have a life of about 6 years so if you get cells that are 4 years old (conservative estimate) you may only get a two year lifespan out of your pack, which happened to me.
Dankie/ Thx Johnny 4 the video. I'm from Africa, so we R still in the Dark Ages. The 4000W motor looks very much like a lawn-mower engine. We have electric lawn-mowers here too.... So I was just thinking... Mmmm....
Why don't you mount it towards the rear in the triangulated section just forward of the swingarm mounts? This seems to be how most do it. Obviously requires a custom bracket and welding.
Hi Johnny, can't wait to see this conversion! I have two questions, you said when you worked at the shop Hub Motors broke a lot of spokes oh, so I thought that a bigger motor would even be worse at breaking spokes? Also I was wondering do you think it would be safe to buy a sur ron from Alibaba? I think you're one of the most knowledgeable ebike guys on UA-cam. That time you road across your state was epic 😎 much respect!! I know because I once rode a Honda 750 four in 1981 from Florida to Northern California
Appreciate that! It’s not the power really that breaks spokes, it’s the quality or lack of it when building the wheel around the hub. Just check the reviews best you can, but ya 🤞
@@JohnnyNerdOut Ah, then I guess its the same china thing regarding weights also. In India we get that amount of weight at even less than 15$s. By the way making in America is deliberately disregarded. China keeps funding the media, leaders, and almost everything to not let that happen. On top of it, the minimum wages has been increased from 10$ to 15$, which is going to appease people, but its main purpose is to invite more "not to make in America" policy. Ever wondered why your videos have less views, despite of such interesting and popular topics you post? Its them controling it.
Why chinease company did abt throtle for not fit in controller? I also order online, and not expected linke u why qs motor are very expensive? I have less budget to convert my old dirt bike to electric!
Hiatus until Ebike builds slow down and I can put more time into it. Currently having issues with the throttle/ controller. Dealing with China (QS motor) has been difficult.
In another video you'd said that chain/belt drives are generally better but that for motorcycles the efficiency differential at higher power is much less and you prefer hub motors. Why is that? Is it just that electric belt drive conversions on motorcycles are a pain in the ass?
It’s like how electric cars work. Single speed essentially but with tons of power. You no longer need a transmission to finesse the power how you need it. With a hub motor drawing a lot of power, performance is very similar and no drivetrain wear.
The only rare earth magnet manufacturer and mine for materials to make rare earth magnets neodymium magnets is in China therefore they are the only real manufacturers of motors because of the magnets
Manufacturing has left the United States because of Free Trade policy and a global race to the bottom in wages. Labor is cheaper abroad, particularly in countries with weak labor movements.
@@JohnnyNerdOut I put the blame much less on consumers and more on producers and the economic system as they have *way* more power and importance in this situation
bru. you are out of your damn mind. if you think it can be make here in America for 100$. it be 1000$ to make here.. why do you think all of our companies move the factory to china. or vietnam or anywhere but America. you can thanks to the no skill needed 15 dollars minimum wages. GG
The qs138. 70h can do 20kw
I do it all the time,
I have about 5 of them. I even have a dirt bike with 2 motors 2 controllers on one jackshaft system pulling about 700nm of tq. I also build my batteries from lipo cells etc..
I have seen all your videos sir , big fan of your works!!
Want to ask some questions regarding the qs 138 70h motors - “ 1) do they heat on 1hr driving?
2) is the torque real ? I mean can it put torque enough to pull a 150kg e bike (I’m planning for)
3) i desire a speed of 60kmph only but with wheelie like torque - plz suggest me a motor sir
Thanks
@@weareaunit8931
The 70h do get hot,
I do believe it is from two factors
1- air flow
2- the overall weight it needs to move.
My orange light weight dirt bike uses the 70h and it just gets warm. It has great airflow and very light weight bike.
You probably be better off with the 90h version. It has better magnets and can produce more power with less heat. I’m actually putting one in a power wheel and over volting it, making a drift trike out of it.
Good point about making things in America especially in the times like this. It makes no sense that you cant get something like that here in the states. Period!
Trump tried to do that, but people voted him out
@@BadFrogg actually look up grin tech a canadian company they do that, its more expensive but they offer added value like higher quality winding, better fixture, integrated splined hub torque arm etc, if you offer better value at the price people will. The chinese one don't last beyond a year, they rust and windings burn out under heavy load. All these hub hotors were designed by australians who setup small plants in china back in 2010 and chinese haven't improved anything on it
@@aakarshchaudhary7359 you are correct sir!!
Yes it's really too bad because Trump was trying to change all that. It's unfortunate but the US just does not make much stuff anymore.
@@tallcool1jeff US is still the #2 manufacturer in the world, with 1/4 the population of China. US is less than China, but more than double the #3 country. US typically makes lower quantity, higher cost goods. China does the opposite (high quantity, lost cost). What also might surprise you is that US is #1 in oil production in the world (yes even in 2023). #1-3 are very close in Oil and switch spots occasionally. I don’t get where people get these ideas.
planning an e moto conversion project and the sense i am getting is a hub motor seems easier, but unless you know for a fact that the motor can go in the swing arm without modification it may turn into a huge headache
generally you will need to modify your swing arm for the motor axle itself, plus add a new mount for rear brake, and that is a lot of sensitive work that you better be a skilled fabricator for. whereas the mid drive all you have to do is make a mounting plate, which there are many companies online that will cnc cut a plate for relatively cheap, some even provide simple CAD software for you to use
Exactly, thats why I went Mid drive
Any updates on how this build turned out? Considering a titled XL175 for a similar project now myself. thanks !
I hope to have a similarly styled hub drive motorbike this Summer. Love the style of this vintage bike.
Is there an update video on this? I would like to see the process and finished product.
Few years ago I took a Honda rear 50cc friction drive and a 1000w 48v front hub motor. The front hub completely out performed the Honda 50cc.
That’s hilarious
I have the same motor but a weaker controller.( still building tho) I'm looking forward to see your result😁
Johnny, great project. If you can mount the sprocket on motor close to swing arm and centered on swing arm it will keep chain as close to same slack through the massive 4 inch rear travel on the swingarm. Welding the brackets to back is worth the time. Find a good welder person that can make and i install rear brackets with motor adjusters for chain tension. This will be a super cool electric retro on an old classic Honda. It will be well worth the cost for a valuable classic "Electrified" by Johnny". The Honda EBJ Retro. Cant wait to see it done.
Dude I feel your pain. I recently recieved a kit from them and I had to make quite a few wiring modifications. The communication has been good for me but there is a lot more hassle that goes into getting their kits to work than their should be. I would way rather pay for American made but there just aren't many options.
I got an 8-12kw v4 hub motor kit from them and one of the hall sensor plugs for the controller and 2 other wires used to get it to spin I had to take off the plugs and solder them together. The display they sent me doesnt fit any of the plugs and the throttle doesnt fit to anything either
That was not a rant that is something I guarantee you well over 100,000 of us think about every time we deal with these e-bike kits
Interested on how you will mount the motor. Some modify the swing arm. Will wait for your next upload.
Thanks for the video! You should do one on how you chose your motor.
Normally the "do it in America" attitude I kinda scoff at saying *we created this outsourcing beast, now we live with it* but I'll be damned, more and more it's turning into *yeah, we probably should recoup our independence on them*.
Sadly we waited till we were this deep in a hole to recognize it.
great series i have 1966 honda im going to convert. thank u for making this video.
So, where's the completed bike video?!?
Still in the works. Bike is currently in another state waiting for me to trailer it home 🏠
When will we get an update on this build?
Soon. Not a whole lot has changed. I’ve been swamped with bike builds. But I did get the battery, chain and sprocket to finally all match
Hello! I love your channel. Thanks for the content man.
I was looking for a motor that's about the equivalent (more or less) to a 400cc engine. Can you give me any tips, numbers, companies,etc to look into?
A very rough guide to go by would be up=watts. 750w=1hp approximately. At 7500w peak you would be around 10hp. 15000w would be about 20hp. Closer to 400cc output
This is so awesome man, definitely wanna do this
Is that the 90h cause if it is it can handle over 32kws of power which would be a bac8000 at like 400a and rediculous phase amps if its the 70h you can handle over 20kw of power with bac4000..... nucular are also a good option 😉 with 100a your not even scratching the surface of what that motor can do (either version can handle 10kw continuous with ease)
Do you have the wiring diagram you used to make ur harness? Or could you document yourself creating it? I’m stuck in the same boat and I cannot find tutorials or guides anywhere :(
Haven't seen any updates on this...
I filmed one and it was garbage. I will refilm and upload
Did you Finnish this project? I would like to see and hear about the completed bike.
Also, im sure you aready figured this out by now but you can buy a wiring harness for that set up that will make everything plug and play.
The throttle was not plug n play. I had to make my own connectors 🫠
Oooooo! Can't wait to see how that goes!
Lol we can go in and start our own electric motor manufacturer, only copper and big magnets 🤷🏾. New sub, I will be starting my project on a rm125.
How goes the build? I'm planning on doing a conversion on my old Yamaha RS 100 that's been sitting in the shed for years. Planning, won't be able to start til next year. Came looking for inspiration ;)
I was inches away from doing my maiden voyage and then I moved across country so now the bike is on a moving truck ☹️☹️
Generally speaking the perplexing paradox you point out rings true the world over. We have multiple capabilities and existing infrastructures in place to essentially supercharge national economies. Bicycle shortage easily fixed. Electric bikes and vehicles conversion services: solve a shit ton of unemployment and income problems, as well as both diversify existing industries and address the global shortage shenanigans. A good portion of the “tech” needed for this was solved and engineered 50-100 years ago. We don’t need to redesign anything, we just need to change the order of operations. Then again , we could easily solve homelessness but for some reason park benches and tents under bridges are still where it’s at. It’s borderline maddening to see how inefficient humans can sometimes be.
You think like I do it sounds like 😬
@@JohnnyNerdOut ha! The faster we all accept how irrational the world is the faster we can all get back to sipping cocktails and watching it burn. WORST. SIM. EVER
Couldn’t agree more we should have more domestically made things. It’s time to bring back more manufacturing back to the states.
BTW did you ever end up finishing this build? I can’t find anymore videos on it. Great content man!
That's a big chunk of motor, bigger than an alternator in a car. I also think that electrical items should be made here in the U.K. or Europe. We are too dependant on China for almost everything. My communication between Junstar the seller I bought my Bafang kit from on Amazon has been great. In fact one of my hydraulic brake sensors went faulty last week and I sent him a message via Amazon asking for a replacement and he sent 2 new sensors within 1 week.
There is a shipping problem world wide due to the pandemic. It is mainly due to the cost of containers which have tripled in price for shipping goods, also there is a staff shortage at ports, so most ships are not being off loaded fully.
The bike is coming along great apart from the throttle issue. :)
Nice!!!!
#irishrover i live in london , and i wasn't sure either i buy the kit from junstar or AliExpress overseas warhouse , after seeing your comment could you please tell me how many weeks until you receive it , and any advice before i buy from this seller on amazon , thank you
My 73 xl175 has ice auger engine on it. Lol. Looking forward to seeing you finish yours.
Yo, I looked through your videos looking for the next video on this but cant find anything ?
It’s up
I clicked this because i was wanting to see how it ran but, Dude all i seen was talk the whole way thru. When you get it running with vary little talk i would be glad to see what it does.
If you want the best value for your $ build your own battery-
the battery cells I chose is Molicel P42A 21700 4200mAh 45A Battery. Has the best performance from what I've been able to research. You'll get about 1300 watts for an hour out of a 10 lb battery pack (80 cells for a 72v 4 parallel 20 series battery that can put out 160 Amps. For your application I would use 3 of them (240 cells) and will cost around $1200
Very nice! How long of a build time? I know eventually I need to start building packs but I just can’t justify spending the time right now 😭
I’ve gotten pretty fast at them to where I can assemble and spot weld them together in about three hours but my first time doing it took a couple of days because I tried to cheap out and solder the batteries together instead of spot welding. I also started my first pack with used 18650 cells but continually had problems so it’s brand new cells from now on- keep in mind lithium ions have a life of about 6 years so if you get cells that are 4 years old (conservative estimate) you may only get a two year lifespan out of your pack, which happened to me.
Cool, 10,000 subcribers are coming with this tweak.
Ya right. Ain’t happening
Qs now makes a water cooled hub motor
Any specific motor recommendations?
Thinking about doing my 1986 Kawasaki KX500.
Did you do it? If you still thinking about it i would reccomend a qs138 90H mid drive or a QS273 hub
@@autumn5274 still looking into it.
Where is this project now
Done with version 1
Any updates on your build?
Dankie/ Thx Johnny 4 the video. I'm from Africa, so we R still in the Dark Ages. The 4000W motor looks very much like a lawn-mower engine. We have electric lawn-mowers here too.... So I was just thinking... Mmmm....
Why don't you mount it towards the rear in the triangulated section just forward of the swingarm mounts? This seems to be how most do it. Obviously requires a custom bracket and welding.
Barely doesn’t fit there😩
i think the motor is to small suggestion would be netgain warp -9 motor and 1000 amp controller
Is anyone doing these conversions in the UK? I want to buy one!
Nice bike! Does it run yet? Cheers!
Not yet😐
@@JohnnyNerdOut you'll get there! Best of luck with it!
Would a hub motor even be an option for motorcycle with drum brakes?
No not really. I don’t think they make hub motors with drum brakes 🧐
there are a few now, on aliexpress, but all lower power. there are also drum to disc conversion options. a mix of the two is a better bet.
Any update on this build?
Video coming in a couple weeks as soon as I edit it
Hi Johnny, can't wait to see this conversion! I have two questions, you said when you worked at the shop Hub Motors broke a lot of spokes oh, so I thought that a bigger motor would even be worse at breaking spokes? Also I was wondering do you think it would be safe to buy a sur ron from Alibaba? I think you're one of the most knowledgeable ebike guys on UA-cam. That time you road across your state was epic 😎 much respect!!
I know because I once rode a Honda 750 four in 1981 from Florida to Northern California
Appreciate that! It’s not the power really that breaks spokes, it’s the quality or lack of it when building the wheel around the hub.
Just check the reviews best you can, but ya 🤞
@@JohnnyNerdOut thanks so much for the reply!
J’ai ce moteur sur mon quad 350 warrior..cela marche fort..13 kW..
WHAT STATE ARE YOU IN ????
16lbs dumbell set costs like around 15$s
Pretty sure they’re $600😀
@@JohnnyNerdOut
Ah, then I guess its the same china thing regarding weights also. In India we get that amount of weight at even less than 15$s.
By the way making in America is deliberately disregarded. China keeps funding the media, leaders, and almost everything to not let that happen. On top of it, the minimum wages has been increased from 10$ to 15$, which is going to appease people, but its main purpose is to invite more "not to make in America" policy.
Ever wondered why your videos have less views, despite of such interesting and popular topics you post? Its them controling it.
You are probably right. 😬
Did you ever continue on this project?
Yes! My latest video is a LIVE video with it running
Everything is 1 week to 2 months out, sucks when you break something
Why chinease company did abt throtle for not fit in controller? I also order online, and not expected linke u
why qs motor are very expensive? I have less budget to convert my old dirt bike to electric!
Any progress?
Yes 👍 check my live videos and Instagram for more up to date stuff. I will be posting the #3 video soon 👍
just some soldering, it will be good to go.
Cheers Mate
So this builds halted? Nothing in months or I missed it ?
Hiatus until Ebike builds slow down and I can put more time into it. Currently having issues with the throttle/ controller. Dealing with China (QS motor) has been difficult.
Love your vids!!!! Please keep "Nerding out" Thanks from Woodinville WA
You got it mike!
Will it ever get built.
It better
In another video you'd said that chain/belt drives are generally better but that for motorcycles the efficiency differential at higher power is much less and you prefer hub motors. Why is that? Is it just that electric belt drive conversions on motorcycles are a pain in the ass?
It’s like how electric cars work. Single speed essentially but with tons of power. You no longer need a transmission to finesse the power how you need it. With a hub motor drawing a lot of power, performance is very similar and no drivetrain wear.
Are you actually going to ride it
in really hope so
@@JohnnyNerdOut I hold absolutely love to see it
Hey man do you know of any E conversion kits I can use to make my Jawa Babetta 210 50cc moped an electric moped.
Check QS motor. They have hub kits too
You know what they say about problems...
Could u comment the link u got the motor from
I just order from qsmotor directly
What about an Astro Flight motor?
Too much $$.
Ooow want this bike 🚲!!!
Where I can get that motor
Qsmotor
@@JohnnyNerdOut model?
No idea why Americans can't build this kit...it's absolutely ridiculous and aggravating to order all of this **** from across the dang world 😭😭
🙏
That motor can handle 25kw peaks
In my opinion my BEST 2 Electric Bicycle Is M55 Terminus AND The ERockit From Germany........
Because American and UK companies are addicted to buying cheap goods from China re branding it and making loads in the process.
Made domestic this kit would be around 1k. Most people don't want to pay that.
I would. And avoid the headache I’ve had to deal with😐
Good point on why we need some American made products and create jobs, but we are being financially targeted and destroyed.
since there are no American manufactures. How about you and I build a business that makes American made electric motors?
There you go start a motor company it you man you
I’d LOVE to. I’d love to team with someone domestically to produce motor systems😀
Класс технарь
ASI BAC8000
The only rare earth magnet manufacturer and mine for materials to make rare earth magnets neodymium magnets is in China therefore they are the only real manufacturers of motors because of the magnets
Manufacturing has left the United States because of Free Trade policy and a global race to the bottom in wages. Labor is cheaper abroad, particularly in countries with weak labor movements.
It is indeed sad how a lot of consumers only factor I cost when purchasing a product.
@@JohnnyNerdOut I put the blame much less on consumers and more on producers and the economic system as they have *way* more power and importance in this situation
bru. you are out of your damn mind. if you think it can be make here in America for 100$. it be 1000$ to make here.. why do you think all of our companies move the factory to china. or vietnam or anywhere but America. you can thanks to the no skill needed 15 dollars minimum wages. GG
A man can dream 😀
Any update on this project ?