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DIY Electric Bike - ebike using 350 Watt 24 volt DC Motor $70 Build
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- Опубликовано: 31 июл 2021
- In this video I'm showing an ebike I built with a non gear reduction 24v DC brushed motor all the parts were bought on Amazon. This was a cheap build, cost without batteries $70 USD includes 24 volt motor, DC brushed controller with throttle, 16T freewheel sprocket, 25H 68T sprocket and 25H chain. My batteries are restored older free finds so you will need to add about $50 USD for two new 10ah or 12ah lead acid batteries. I have ordered some new batteries and will do an update video on performance, I might also try a lithium battery pack. I built this ebike because I wanted to see if it was possible to build an ebike with an inexpensive non geared 24v DC brushed motor. I used a scrap kids bike because I used a non gear reduction motor, I don't believe it would be powerful enough on a bike with larger wheels. I wanted to build an ebike that could climb hills and not just give an assist, with this set up the bike is fully functional with all it's gears so even if the batteries die you're not stuck without gears. To charge I use a 12 volt battery charger and charge batteries separately, I also use an old 24v lawnmower charger and plug into the bike directly. I welded the freewheel sprocket to the hub of the bike wheel, make sure you know the proper direction of the motor and sprocket. You don't have to do any welding if you buy a freewheel adapter and remove the cassette off the wheel and install two 16t single speed freewheel sprockets with the adapters, everything can be found online. I chose to mount the motor over top of the wheel there's a few reasons why, I didn't want the motor near the peddles or my legs also I didn't want to change the size of the chain that came with the 25H sprocket. I know a lot of people don't weld but you could built this without welding if you drill the bike frame and bolt and screw the mounts together. I will do more detailed videos on building the ebike, performance and wiring if you would like more info. Big Thanks to my Subscribers! hope your all doing good. If you're new to the channel Please consider subscribing and turning on notifications it really helps the channel and I can build more projects. Thanks for watching. Peace
Putting your sprocket on the other side of the back wheel like that, just going with an entire extra chain system, the motor all connected & mounted over the back side like that... 🤔 I never thought about doing it like that. I KNEW there had to be a better way!
Awesome stuff, thanks for sharing it.
Were you going to do it with suicide pedals? There isn't really another another way to do it...
You are doing exactly what I wanna do, love the content. Please make more e bike videos. I'm broke so the cheaper the better.
Bro same . Although you shiuld try to be smart and not dumb like me. I’m pretty sure if you look hard enough you can get yourself a good motor thats not that big. But i got the same one for about 40$ so u might be able to try it out!! Gud luck!
You sound like lord balish (little finger) from game of thrones 😂 . Good project keep up
I take that, but I'm nothing like Lord Balish tho 🤣 Thank you so much!
Very nice video. I'm trying to figure out how to build a light weight electric bike to
carry my golf clubs.
Bro that thing is the future of ebikes I love it
Thanks 👍
Like to see more on the wiring/ control.
The finest modification you can do for a chain driven electric bike conversion is without a doubt adding a freewheel. The only thing I would upgrade is a 36v lithium battery.
That motor is HUGE!!
No its average
Amazing job I'm doing it forget it live and learn
Thank you! good luck, with some research its not hard.
Nice work! Hope the fresh batts got you better performance.
Hmm. I bought a left-side drive freewheel but I can't weld. I am putting together my first ebike (after fun times with an electric 3 wheeled wheelbarrow). I was picturing pretty much what you have done, but with a geared motor for more torque. Will have to get a favour from someone to add a bigger sprocket and mount the whole freewheel to the hub. HMMMM.
I will know when the parts are in my hands! Good stuff. One way or another, I will get it done! Might not go fast as I didn't do any math. But that's what a prototype is for!
Thanks a lot 👍 I recently put some 12 Ah lead acid batteries on, it's way better but I will upgrade to lithium one day. You can remove the cassette and put on an adapter so you will have two single speed freewheels the one for the motor use a flange type freewheel and bolt on a large sprocket, but you will lose your pedal gears tho 😢
@@kurtscottage
Totally just got myself something together after watching your video first time! I honestly didn't do any more research haha, just thought, alright mate, he did it, YOU do it! Thanks for that! Very fun to do yourself.
Didn't do you justice, but managed a sturdy build using cut barn-hinge as a mounting plate w motor right near hub.
In the end (6 tries) I just bodged together something w a freewheel on the motor driving one gear and keeping the original chain (2 speed front + fixed the rear derailer on one gear). Can pedal normal and coast and use motor for "assist" (but the motor sends the pedals round haha). Put nearly 100Km on it so far regardless. So much fun I haven't yet tried rag-jointing a sprocket on the other side and doing it all over (so I can keep my feet still with the motor going).
12V motor but I tried 24V for a minute and that thing moves! +40Kph but it gets hot quick! Thinking of adding a series/parallel battery switch for "passing" the store-bought bikes (limited to 32Kph in Canada).
18 Ah SLA motorcycle battery slung in an ammo case w a similar PWM controller and external charger (but don't charge in a sealed box).
Didn't cost that much if you only include the parts that worked in the end :)
Thanks again for the inspiration, sorry to waffle on
Nice batteries dude ..that must go to hell fast downhill! 😆
Im also building an diy electric bike. Im ziptying the wires to the bike frame, but should i use electric tape to cover up the exposing wires?
yes u definetely should cover up the wires. If you're using a 24V motor it'll be pulling around 14A of current which is pretty dangerous. I'd even suggest a whole crimped wiring setup as it allows for safety to be prioritized but at the same it's easy to disconnect a wire connection for whatever reason you might have to disconnect it.
May I know if you any fuses in your wiring?
cool,love the vise-grip crimp tool😁
Thanks, have to use what tools are within reach 😎
@@kurtscottage Yeah I bought the crimp tool with the little tooth to get the connections solid. I never thought of using the vice-grips. That was clever.
Does the motor have a brake, or do you have to use the bike's brakes?
flux core wire ?
Sweet!
I might make one for myself! :D
Thanks
Using the small motor makes it more affordable. I have an idea to increase available torque by using the leverage principle. Will need mountain bike cranks & to increase torque connect motor output to large gear on crank & connect small gear on crank to wheel. This will give you a lever advantage. The difference between the small crank & large crank in Outside Diameter is like a small lever & will increase torque to the wheel & should help with going up hills.
Thanks! for sharing the awesome ideas 👍, I only did a simple setup but with your setup it would probably work much better up hills.
I LOVE your ebike builds.
Got the long Covid, so I fatigue easily when i try to exercise. So a cheap ebike seemed to be just the ticket. I'm 6'7 and weight 300 lbs, but it's illegal to have ebike with more than 250w assist, unless you register it as a motorcycle here.
So i got the 250w kit with the geared motor.
Two questions.
Is there a reason you put the freewheel sprocket on the wheel hub, and not on the motor? This is not i critique, but genuine interest. Seems like the cheap little chinese free wheels would be prone to failure, and will need some maintenance, since they are not sealed. So i would have thought that putting the free wheel on the motor, and hense further from the road grime, would be better? Also - if the free wheel is destroyed, it's welded on, whereas there are adapters to make the free wheels fit on the motor shafts. Welding the sprocket directly to the wheel hub should be easy. But you are the expert, so i would love to know your reasoning :)
Would you advice me to get a higher wattage controller than the motors output. Like a 500w 24v for a 230w 24v motor?
And dude - thank you for all your awesome videos. You have helped me so many times with your down to earth solutions. From clearing snow, fixing rust on my car, and now with a solution to my health problem. Seriously - if i can make my old military bike work with 250w assist, it would be a game changer (I have plasma, welder, metal brakes etc, so the fabrication should be doable, so it's just a matter if the motor and controller will hold up)
Keep up the great work :)
Thank you so much! Sorry to here that, hope you get better soon. I guess the best reason to put the freewheel on the hub is so the chain isn't always turning, but true changing it is a pain. I had to do it the other day welded it on backwards lol. You could weld the drive sprocket right on the hub, many kits work that way but use spoke rippers. At that wattage I would use the largest 410 sprocket you can find on the hub. One of my bike uses a geared 250 watt motor they would probably be better for your build, I over volted one from 12v to 24v 500 watts, I ordered the 12v motor because it was half the price, but It does get warm. If you could add some cooling like a fan or heat sink to your controller and motor that would really help. I don't think its a good idea to increase the wire thickness to the controller, this will guarantee to eventually burn the controller. I find the wires act as resistors, can be a good thing tho, use more heat resistant wire or cover individual motor / bat wires with fiberglass selves. Have everything so you can disconnected easily just in case. I'm working on another build will try and add more advise on low wattage builds. Good Luck
@@kurtscottage
Thank you for your kind answer :)
I got the 250W kit with the "spoke rippers", as you call it, that was a 32 tooth gear. Got a 500w controller for the 24V motor, and out a 25 amp fuse between the battery and the controller.
Also put a 60 amp switch between the two 12v 12ah lead acid batteries, so i can balance charge them. Just hot glued a buck converter to both batteries as charge controllers, so now i can just flip the switch to disconnect the batteries, and power both buck converters from one 4 amp 19v laptop power supply. So now i can bring the charger when i drive to friends houses, and plug it in, via the 5.5mm plug i soldered to the inputs on the buck converters.
The gearing is actually perfect. Even if I weigh 300 lbs, and my 38 year old steel military bike another 65 lbs with the batteries. It's not fast, and i have to assist when the incline is more than 3-4%, but that's fine :)
It was a little hard to install, since the bike has the three internal hub gears, so the hub on my bike was 52mm, where the spoke ripper gear only had i 36mm hole. But with a kompas and some patience with a carbide bit, i made it fit.
I have put about 200 miles on it so far, and it works great. Only thing is, that is seems the thumb throttle with the three indicators lights are expecting a 7S lithium battery pack and not SLA's. So where two fully charged 12v SLA's gives you 27,6 volts and 7S lithium would give you 29,4. So it's a little hard to figure out when you are truly about to run out of power, i you dont hook up at voltage meter. So I will find a cheap one, and do that.
But awesome kit, for tinkerers :)
Once again thank you for your videos. Without you, i would never have built this bike.
But now I'm all in, and have soldered a spot welder, battery capacity testers, balance chargers and bought a couple od BMS's, active balancers etc, so i can build my own Lithium pack, for all the the used cells i have lying around :)
What controller is it? Is it a brushless motor?
Hi! Im building a similar build for my electric bike, and i have a question about the rotation of the motor. I've built my diy bike thats similar to your, and it using the smae exact motor your using, but the motors spinning the wrong direction. How can I reverse the direction of the motor? I have it hooked up to a 2 pin rocker switch and a 22.2v 1400mah battery and it all works, but how would i have to change it if i wanted to make it go the opposite direction? Its going clockwise now, but i want it to go counter clockwise. If i swap the connectors on the motor ( like connect positive motor wire to negative battery wire and negative motor wire to positive battery wire ), would that work?
If you're not using a controller, changing positive and negative connectors would work.
If you are using a controller though, you probably connected something wrong or built it in the wrong direction. I'm not sure if it's gonna be okay when you connect your battery or motor backwards, but there is a chance that you can fry a diode or two.
Change the polarity or terminals and the battery pack is not powerful only1400mah is too low you should have 20amp minimum because the motor current is 19amp and should have more mileage or riding distance i use a 45amp battery pack
@@shanav3325 pls tell me the batt pack yiu got!! Also the cost!! Look finding a good battery is so hard for me and Idk why!!
Is it a lipo batt ur using?? Or an acid…
What's max speed ?
A easy way to connect motor to drive bike is by fitting another pedal crank gear on the left of bike & connect motor to gear on left crank & right crank connects to wheel gears. Only need to mount motor in centre of frame & cut off pedal crank arms. Easily reversible.
I like the idea. Send me information
give us links to parts on Amazon
First one u can find on google
Good work
Thanks 👍
-hi is this enough for a 10 year old kid pedal car to be transformed to electric, I gues it would be enough
What no of the sprocket and chain used THANK YOU
Interesting build. Could the motor be wired the other way and mounted right above the back tire? Your setup looks like it would affect balance badly. Otherwise I like it. Using a bigger driven gear it should work fine with a grownups bike.
You should look at LiFepo4 batteries?
How do you make the motor from slow spin to a fast spin?
That's what the motor controller does. If you use a cheap brushed motor, you need the controller to be specifically for brushed motors. Easy peasy.
All that welding yet you don't know how to solder those two wires LMAO good stuff
Where can I find a chain that fits the pinion on the motor? The chains I have are a little bit too big.
Can someone recommend me a battery i aint finding some. And im from germany so amazon dont have items from usa
This whole build is super sketchy. Just the way I like it. In fact, you should have a line of merchandise with the name/logo: SUPER SKETCH!
Also, it would be good to get an idea of how long the brushed motors can last.
Привет всем ребятам! Можно крепления электромотор сделать на багажник. Слева стороны крепления электромотор звезда цепь на колесо большая слева звезда крепления резина, как мотовелосипеда крепления большая звезда.
Could i use that bery motor but hook it up to a 12v car batterry?
try a 60ah battery
Can it wheelie? 😎
How much speed you gain from this motor
What distance is obtained in one charging?
@kurtscottage can i use the same technique with 250w
My brother and I want to take a couple e-bikes that we build ourselves and fit them to the railroad tracks where I live they're all abandon not too many Hills do you still like the scooter motor
That's a really cool idea / project 👍 they removed all the abandoned tracks around here. My motor still works well, I think the scooter motor would work fine, you could always use two of them, Good Luck
The motor is better near of the floor in mid drive
i think the one i have is
24v
350w
30,000 sum rpms
The welding is a deal breaker for me, But I have seen kits that have a bolt on sprocket.
Welding pretty easy bro
Have a go
Practice on different steel watch some youtube clips
Stick welder set up $100
Its a handy skill to have
where di you buy the e controller? can you drop down the link here? thanks man!
how much weight lift?
can i overvolt this into 48v?
Hi does anyone know where I can get this motor? Thanks.
eBay bro sell whole kits
omfg bro i have the same exact motor...i think ima try the same thing!!.....maybe
Build it up! I would recommend putting the motor on a bike with a smaller rim like 20 inch. The kids bike I used works great, it's very light also if it was a larger bike I would have needed a huge sprocket on the wheel. Good luck
If you set up the front wheel as a dynamo, you could recharge your batteries as you go, it would not fully charge the batteries but it would give you an extra few miles for nothing.
Better way is to have regen braking. Disadvantage is continuous motor drag to get about 5% improvement. Not worth it, unless you ride down hills a lot.
Recuparation break. ;)
Conservation of energy....if you use 500w to move and capture 250 back with a dynamo 200 goes to the battery and 50 is heat. It's a net loss
Bro has beef with exercise
I have a question - will this type of motor change the direction of rotation when reversing the positive and the negative wire?
If not, you need to be careful when ordering. If the motor spins clockwise (like yours), you can mount it left of the wheel. But if the motor spins anti-clockwise, you can only mount it over top of the wheel.
Then, why not just flip the motor so the drive sprocket is on the other side?
Neat,but 1 question why not mount the battery down low, or put them on a little trailer?, would be much better handling,
It seems silly at first, but I like the idea of a battery trailer! Could really put on the miles and as you say, would not make the bike tippy. I often ride with a trailer so I will make a parallel battery cable extension so I can add batteries (when I make my electric bike :)
Klo dinamo ngeden berat knpa ya
How is that bike now? I bet you could stuff a 750w in that 350 motor?
Thanks. The bike is still working good. I road it the other day, It's not as fast as my others but I have a 500 watt motor and it would bolt right on 😎
Hey I’m using the same motor and was wondering if u used a different gear on the motor than the one that the motor comes with becuase I bought a bike chain and it does not fit the gear
Yes you could order a bicycle chain motor sprocket maybe 8 tooth #410 if your chain is for a single speed bike, I ordered some online for a couple bucks.
@@kurtscottage Ended up buying the right chain i was just being stupid. I am now ordering parts for my own bike conversion. I'm going to kinda loosely base my design off of yours if you dont mind lol ;). I was just wondering why in the description you said that you needed two batteries instead of one. I thought you only need one battery connecting to the controller. Thanks!
@@jaakkaan4784 His motor is 24V so he has 2 x 12V batteries in series (one after the other like in a flashlight). I sourced a 12V motor so I could use a single battery.
Connecting batteries in series adds their voltages. Connecting similar batteries in parallel adds the amp hours (runtime). A bit of research will sort out the details and safety concerns!
Question - what is the wheel size of your bike
Appears to be *_20 x 1.95._*
Comment 💯 🎉🎉🎉🎉🎉🎉🎉
Please where did you buy that 350 watts dc motor ?
AMZ but you can find them on many other sites, you have to watch the prices tho.
Original cycle
What does the controller do exactly . Could you not just wire the motor up to the battery with an off and on switch or am I missing something ? I WANT TO BUILT ONE AFTER WATCHING THIS BTW well done mate.
PWM (pulse width modulated) controller ($25 China) allows you to control the speed like a throttle without losing motor torque, so you can accelerate nicely and get the most out of the batteries.
@@CarlDidur thanks for your help mate. Can you also help me. I’ve fitted the controller but I don’t want a rev I just want a switch instead of a red I’ve fitted the controller . Will I loose any power with just a switch if I connect the red and black wires together of the Rev. I’m not very clued up with volts and stuff haha I’m a bricklayer... cheers mate
@@anthonyglynn7361 Not quite sure what you are working with over there!
If you just want a switch make sure it is hefty enough to take the current (20A) and put it between the + battery and the motor. Then it is just ON/OFF at full power!
Thanks a lot 👍
@@anthonyglynn7361 did you ever figure it out? I could help you
How fast is this?
About 33km 20mph or little faster on flat ground. It's faster than my scooter hub motor fwd ebike on flat ground.
btw on my motor i cant get that small gear off. can you? or is it perminant?
I was able to take one off, the motor has left hand threads so you have to turn the nut clockwise to loosen. Try holding the gear with vise grips carefully, ✌
@@kurtscottageim doing an e-scooter kit with it! So by what you said. It then means that its lefty tighty and righty loosy?
@@kurtscottageoh btw in this past year i did what you did in the video but with a 2stroke engine instead lol😂
Yeah flat planes only and batteries will last decent time.
100ah lithium batteries will sort you out..
Thanks, I defiantly need to step up to some Lithium battery packs or Lifepo4
😆😆😆😆😆😆
Slow
You get what you pay for
go 72v 3000w. friend of mine made one it goes 60mph. but thats like $2500 in parts. thats big motorcycle money so its kinda pointless.
Bro for that price and for a motor that size that's more than enough