Motorized Bicycles

[Anonymous No.1745475]

[Anonymous No.1745478]

>>1745475
I built one of these. First time I even touched a gasoline engine. Learned alot about 2-Stroke Engines because of it. Was fun to build and fun to ride. Best of all, very cheap.

[Anonymous No.1745479]

>>1745475
More:
>>>/n/

[Anonymous No.1745481]

>>1745475
Only drunks who have lost their license from multiple DUIs have these.

[Anonymous No.1745485]

>>1745481
Joke is on you, I never had a licence in the first place!

[Anonymous No.1745490]

>>1745475
Was always curious about one of these but I'm paranoid that the engine block/head would be made out of such cheap chinese potmetal that if I blew a rod, I'd have a hot chunk of metal fly up into my leg or cock'n'balls

[Anonymous No.1745497]

>>1745490

It is cheap potmetal, but the engine never revs high enough to be dangerous. If it is of any help, among all the problems that users had with those kits, a bursting engine block was never mentioned.

[Anonymous No.1745501]

>>1745497
Is there a cheap/affordable way to get more than one drive gear working with these engines? I remember a while back when I looked into these that you basically work through one gear's powerband

[Anonymous No.1745503]

>>1745501
Hmm, I think I've seen something related to this on one of the american vendors/reseller websites but not sure. Some YouTube Videos about DIYing their own gear shifter onto those kits can be found though.

[Anonymous No.1745604]

>>1745501
Tensioner, jack shaft, tensioner, run chain to existing gear cassette.

[totally not an engineer No.1745696]

>>1745501
the reason for that is mostly legal. in a lot of jurisdictions it stops being a moped/scooter and becomes a motorcycle once you add manually changable gears. you either have to use a CVT or go with a single drive ratio if you want to stay legal

[Anonymous No.1745721]

I found one of these little pieces of shit in the garbage. been thinking about throwing one of these engines on it for shits and giggles

[Anonymous No.1745775]

I saw one of these on the road once
Was even more aggravating than a normal cyclist in the road because the guy thought he could keep up with traffic and was going like 15mph in the middle of the road in a 35.

[Anonymous No.1745870]

>>1745475
Get a 1000 watt hub motor with a 14ah lithium battery. Its like people have hard on for shitty gasoline noise and fume generators.

[Anonymous No.1745872]

>>1745870
Make sure you get a good quality battery and waterproof the fuck out of it. The shitty batteries get water inside them, and fucked over pretty easily.

[Anonymous No.1746002]

>>1745475
people used to make those around here and then the government saw that they were fun so they made them illegal.
one of the unfortunate consequences of not being able to tax something.

[Anonymous No.1746193]

>>1745475
those kits are grade A chink trash

If you are going to make a motorized bicycle you should go electric it is the future just like anon sez >>1745870

but if you like burning oil by design, like I do, you get your self a Velo-solex or Mobylette.
The Solex is so unique they go under the radar. No insurance required or anything (where I live). 39cc, 2-stroke direct front wheel drive engine! Arrive at your destination in style! The noise will grab everyones attention before they even see you! Once they get close they might be overwhelmed with the smell of 2-stroke exhaust and if you had to traverse a large hill on your way you might also smell of gasoline. The fuel pump works by vaccum and under the stress of a large hill it may back fire and gas may shoot out of the vent on the gas cap.
buuut dont let all that stop ya! they are great!
I get wasted at the bar at moped home all the time.

[Anonymous No.1746197]

>>1745870
Because noone picks up chicks with a battery powered bicycle. Also enjoy feeling smug perpetuating more toxic shit into the enviroment such as your batteries. But then as most e-fags are, they can't understand that.
>>1746193
Drunk on a bike, even pedal power is still a dui dumbass.

[Anonymous No.1746216]

>>1746197
I'd like to see those faggot pigs catch me supermaning away at 45mph
https://youtu.be/r4Bahgb6ZlU

[Anonymous No.1746722]

>>1746216
one of these days he's gonna spill all over

[Anonymous No.1746731]

>>1745475
You can still use the paddles?

[Anonymous No.1746759]

>>1746731
Yes, but you got to pull the clutch. Letting clutch go while driving, starts the engine.

[Anonymous No.1746760]

>>1745475
these are strictly for degenerates. dont perpetuate the stereotype

[Anonymous No.1746762]

>>1746760
I heard degenerates breath air....
>imagine not enjoying a nice beginner level DIY motorbike because someone on the Internet doesn't want you to

[Anonymous No.1746805]

>>1746762
I think he meant the ebike, not the gas ones. In my town, it's ebikes everywhere, dead of winter, northern Ontario. Apartment buildings with hundreds of extension cords draped over their balconies, bikes littering the walkways. There's a battery fire every couple days. These degenerates use it as primary transportation, through snow, on the fucking road with a top speed of 30km/hr at best, constantly jamming traffic.These motherfuckers cant afford equipping with winter bike tires. No license, no insurance. Cops won't do fuck all cause the goddam mayor.
It's pretty often they end up under someone's wheels but even the local news paper won't publish it often due to it making the city look "not green". Not even the gas bikers are that dumb. Anything with less than 4 wheels (or 2 skis and a track) does not belong in Canadian winter community roads.
Would I piss on a gas biker keeping expected speed in such conditions? Never, I'm a biker too, but you don't see em, not even scramblers, probably due to all the fucking salt not to mention the obvious hazards.
Only the electrics and it's because of degeneracy, and governments perpetuating it. And this is why I'll never have any respect for ebikes on pavement.

[Anonymous No.1746825]

best vids i have in a folder
https://www.youtube.com/watch?v=lcSLUu_Qd50
https://www.youtube.com/watch?v=slSST7Y9LUQ
https://www.youtube.com/watch?v=nJPZSG0pIxQ
https://www.youtube.com/watch?v=RJc1SyOyCeo
https://www.youtube.com/watch?v=KGSqF7zxAI8
https://www.youtube.com/watch?v=Jsqhm8Jxll4
https://www.youtube.com/watch?v=znqcqQV5yX4
https://www.youtube.com/watch?v=8yUkAQGIKhM
https://www.youtube.com/watch?v=rHajYlh_jfg

[Anonymous No.1746849]

>>1745497
>never revs high enough
unless you add nitrous

[Anonymous No.1747020]

>>1746825
Those are all customized. Well, I guess it fits on /diy/ but the original (China) kit simply doesn't deliver this kind of power.

[Anonymous No.1747074]

>>1747020
i think most if not all engines are 4 stroke in that video

[Anonymous No.1747078]

>>1747020
most if not all engines are 4 stroke in those videos

[Anonymous No.1747148]

>>1745475
Isn't this dead now that electric bikes are a thing?

[Anonymous No.1747233]

>>1747148
>electrical bike
This is where I would have inserted a joke about very long power cable issues, but don't.

Gasoline has still some features that make it worthwhile. No charging time is one.

[Anonymous No.1747704]

they sadly arent street-legal where I live otherwise I wouldve revived an old bike for 80 euros

[Anonymous No.1747712]

>>1747704
Same for my area. Didn't stop me from making a motorized bicycle though. It would be nice if I could simply drive it, but for now I just treat it as bug-out vehicle.

[Anonymous No.1747714]

>>1747712
that is actually a viable use for them. thanks for the idea

[Anonymous No.1748143]

>>1745501
Fab a briggs and stratton variables clutch kit to it?

Or get like a 15 speed and put a clutchbon the motor if it doesn't already have one. Run it to you pedals and youd have a small 5-10 gear change still from the factory on the back wheel

[Anonymous No.1748145]

>>1745721
Youd be better off going somewhere like tncsooters.com and getting the parts to fix it or hotrod it with electric.

[Anonymous No.1748146]

>>1745870
Old habbits die hard bro. Brushless and lithium are the greatest 2 things on earth

[Anonymous No.1748147]

>>1746002
So get a 35 year old motorcycle frame and build one into it. Tag it as an antique if you can even antique tag bikes. Like 50-100 bucks and 20 bucks a year after that

[Anonymous No.1748151]

>>1746193
>front wheel drive
>No U

I thought i was cool and built a 1,500 watt front wheel drive. I yeeted the fucker off a bridge during my 3rd accident.

[Anonymous No.1748152]

>>1746197
True story.

Even better story. About 20 years ago my buddy had drug and alchahol class with a bitch that got one on a fucking horse...

10 years later a guy in my class said his wife got one on a horse. Small world

[Anonymous No.1748156]

>>1746216
MY FUCKING SIDES!!!

I always wanted to pimp out a pocket bike. Get a mast and haul dick. If the cops chase you just toss it over a fence and take off again.

[Anonymous No.1748193]

>>1745870
3500w 58ah master race

[Anonymous No.1748198]

>>1745775
>the guy thought he could keep up with traffic and was going like 15mph in the middle of the road
On the bright side, you run this idiot down and every judge in the country will call it justice.

[Anonymous No.1748220]

I have an old schwinn S1000 that I want to turn into a project, can anyone give me some ideas and options/different routes I could take? It would have to be relatively quiet, I would put an engine on it if there was a way I could cut the sound of exhaust down to acceptable levels. But I'd love to hear what you guys can suggest. Used to to have my 6'3 family member ride it and it would get him up our steeo hills and every thing so im feeling inspired by the much better battery tech out now

[Anonymous No.1748480]

Get disc brake hub with a rim brake rim and drill sprocket given with kit to match disc pattern and no more loose spokes and solid drivetrain

[Anonymous No.1748569]

>>1745501
You could covert a three speed bike that has a transmission in the hub.

[Anonymous No.1748580]

>>1748193
Nigga you gonna die.

[Anonymous No.1748584]

>>1746197
>Because noone picks up chicks with a battery powered bicycle
no one picks up chicks with a bicycle period.

[Anonymous No.1748711]

>>1748220
1,000 watt brushless scooter hub motor and controller. Fuck near silent.

[Anonymous No.1749886]

If i could get away with it i would but i live in a rural area with a lot of heavy truck traffic and drunk rednecks, even with a full on motorcycle I would be run over.

[Anonymous No.1749890]

>>1749886
Oh say can you seeeeeee

[Anonymous No.1750189]

>>1745475
Chink 2 stroke kits are the worst thing you could ever do to a bicycle.
Look at the range you need, and work from there. Less than 50 miles? Go full electric. Over 50 miles? Oh shit nigger what you doing? It's a fucking bicycle! Go electric anyway, strap the cheapest Honda generator you can get to a rack on the back and use it to keep the battery charged.
Or you could just ride a motorcycle.

[bump No.1751379]

bump

[Anonymous No.1751420]

>>1750189
35 amp hour battery could do the trick. The prices are coming way down.

[Anonymous No.1752633]

>>1751420
You can get Tesla battery packs now at 99% capacity on eBay for 190 a kw.

[Anonymous No.1752641]

>no one posted the fortnine vids

https://www.youtube.com/watch?v=k4AiZyN88l0
https://www.youtube.com/watch?v=XMjjTK-yZy0

[Anonymous No.1753873]

Just cannibalize those shitty bird scooters for batteries and the motor

[Anonymous No.1753877]

Has anyone tried overvolting a hub motor? How easy would it be to drill a bunch of cooling channels through the magnetic core in order to run water through it?

>>1752633
>190 a kw
Is that meant to be kWh?

[Anonymous No.1754048]

>>1746193
God I want a solex so bad

[Anonymous No.1754623]

>>1753877
That would be extremely difficult. On most hub motors, the whole motor shell turns, so the plumbing would have to go through the axle some how.

I would just recommend statorade and maybe some hubsinks.

[Anonymous No.1754835]

>>1754623
>so the plumbing would have to go through the axle some how
The axle doesn't turn at all, so it could just be a small hole in the middle of the axle, in on one side and out on the other. But even more so, where do the three wires go into the stator? Surely there's room near them for a 3mm hose.

[Anonymous No.1755730]

>>1754835
i've read a bit into cooling for hub motors but there have been no proven methods for active cooling, only passive
https://www.youtube.com/watch?v=JZU-mhlNcqE
https://www.ebikes.ca/product-info/statorade.html

[Anonymous No.1755919]

>>1755730
You can actually buy BLDCs with water cooling, but they're internal-rotor designs and just have a water jacket around the outside of the stator. I think they're designed for RC boats, where there's plenty of cool water to be sucked up with a little pump.
I care about getting the most power I possibly can out of a 2-3" diameter wheel motor (not including the tire). But I've heard that the flux density at the tips/fingers of the stator can get high enough to cause saturation in some cases, so cooling isn't my only issue.

[Anonymous No.1756032]

>>1753877
Sorry, 190 USD per kWh.
https://www.ebay.com/itm/Tesla-Model-S-Battery-Pack-Module-24V-250Ah-5-2-kWh-444-Panasonic-18650-Cell/114078459620?epid=2287609742&hash=item1a8f9b26e4:g:n~QAAOSwxlBeJ2xK
163 here.

[Anonymous No.1756793]

>>1754835
Statorade is the only answer. Also only for the big direct drive hubs. The tiny geared hubs can't work with it.


>>1755919
Those things are useless for ebikes. Fuck-all torque and 10billion RPM. You'd need a hell of a gearbox to even think about making them useful on a bike.

[Anonymous No.1756899]

>>1756793
>statorade
Interesting, but the rotor is fucking spinning so I can't have fluids going in and out of it, and the tire will be directly against the outside of the motor like an e-scooter. The main problem is that with two bearings on either side of the motor, I'd need the wires and the fluid pipes coming out inside the bearings. In fact, having a hollow central shaft for the fluid wouldn't interfere with strength much at all, getting the wires in would be more of a hassle. But how the fuck does something like pic-related work? How big is the ID of the fucking bearing?

Well a properly designed planetary gearset would fit fine within a hub motor without damaging its symmetry.
But more importantly, that particular model was just to show a BLDC with water cooling, not a BLDC that I'd actually use. And many e-bike hub-motors and electric scooter motors are direct-drive, this one would just be a bit smaller than a scooter. To make an electric motor have more torque and lower speed, you just wind it with thicker wire and less turns, and power it with higher current. And design it to handle the higher magnetic flux.

[Anonymous No.1757417]

>>1745475
I had an idea about how to do a hybrid with off-the-shelf parts >>>/n/1441663
>front-drive electric motor for quick acceleration
>gas engine with tall gearing for range

[Anonymous No.1757741]

>>1757417
Sounds heavy though

[Anonymous No.1757756]

>>1746197
>Drunk on a bike, even pedal power is still a dui dumbass.
Not in washington.

[Anonymous No.1757762]

>>1746216
Motorised bicycles have a horsepower limit last I checked, any higher and you need a motorcycle licence. So I'm wondering how fast you can go with a custom-made shrouded motorised bicycle while remaining under that horsepower limit.

[Anonymous No.1757840]

>>1757762
i'm a leaf and don't know state laws, but i'm pretty sure the limits are based on engine cc or watt rating. here we're limited to 500W motors and 30km/h but even on my stock 36v ebike a can hit 40km/h on a full charge

[Anonymous No.1757909]

>>1757741
I mean, the whole electric part is just a way of solving the crappy torque and acceleration of a tall-geared gas bike without a proper transmission. A $1500 chink 250cc dirt bike would BTFO a hybrid motorbike pretty much everywhere on paper, except that chink bikes have shitty parts availability whereas a motorbike can use any generic small engine.

[Anonymous No.1758021]

>>1757909
Then why not just have the petrol engine go through the already existing gearing of the bike?

[Anonymous No.1758030]

>>1756899

Statorade is tried and true, the best answer to hub motor cooling. Running coolant to the wheel is incredibly impractical, and would require designing a hub from scratch with oddball bearings, etc. $$$$

Look up a Zero motorcycle, it's a water-cooled ebike, but the motor is an inrunner, not an a big outrunner direct drive.

You want smaller wire and more turns. You can't physically fit more turns with thicker wire. More turns == more magnetic flux per amp, more back EMF = slower top RPM. Less turns == less back EMF and less flux per amp.

End result is identical torque, but different voltage requirements.

For example Crystalyte H3525 has more turns than H3548, but yet one tops out at 250ish RPM with 48v and the other tops out at 450ish RPM.

[Anonymous No.1758083]

>>1758030
>Statorade is tried and true, the best answer to hub motor cooling
No room for heat-sinks because that's where the tire is going to be, it won't work. Unless I want heated slicks, then it might help.
The entire point of having a water-cooled wheel motor is to have it be as compact as possible. Not having a wheel motor is out of the question. As I said, electric scooters have direct-drive wheel motors and have reasonable speeds, and those wheels are barely twice the size of the wheels I'd want. My point is to get the power output I'd want from the wheels, I'd likely need water cooling. This isn't just 1.5 times the power density of a normal brushless motor, it's closer to 4 times. Of course it would require designing a hub from scratch, I've known that from the beginning because you simply can't buy wheel motors of this size anyhow. Remember that the core of the motor is stationary, at no point would I need any sort of rotating liquid seal.

And once again, how are the wires getting to the pic >>1756899 without going through the bearing, and what's stopping me from putting a water pipe or two in through the same way? Or do they just use large bearings? I could always use oilite bushings to be more compact.

>End result is identical torque, but different voltage requirements.
Yes, I slipped up there, but I did say thicker wire and less turns. For what I'm doing, I'd be decreasing the number of turns relative to the voltage; effectively overvolting it to get the required amp-turns. I guess that means testing such a motor would be easy, I could just increase the voltage instead of rewinding the thing.

Just to be clear, what I'm talking about is a more refined version of the "drill a bunch of cooling channels" idea first posted.

[Anonymous No.1758094]

>>1758021
The petrol engines for these bikes, like motorcycle engines, come with transmissions that put the drive chain on left side of the rear wheel, because most bikes have the crank and gears on the right side.
The only way to get around this would be to get some custom left-hand gears, get a new transmission that cranks the right side, or turn the engine around, mount it above the rear wheel, and see if it will run backwards (probably not because capacitors have positive and negative leads so there might be issues with the CDI), or mount the engine way off to the right.

[Anonymous No.1758095]

>>1758094
Why not just have a ratchet in the pedals and directly run the main chain over the motor's output sprocket? Assuming you flip the motor around or reverse it or whatever is necessary.

[Anonymous No.1758103]

>>1758095
That requires actually getting the motor set up to crank the right side first, which I'm not sure is possible without custom (read: expensive) fabrication.
2. I'm not sure if it exists and if it doesn't I'm not going to make one because I'm not an engineer.

[Anonymous No.1758108]

>>1758103
The path with least fabrication would be to put a pair of sprockets to move the drive from the left to the right. Just a little welding, a couple bearings, etc. Plus it lets you have a rear disc brake.

[Anonymous No.1758142]

>>1758083
>how are the wires getting to the pic >>1756899 without going through the bearing

My guess? They aren't. It's just an oversized bearing. Could also be a geared hub, which wouldn't necessarily require a bearing right next to the drop.

Anyway...I actually made a halfassed attempt at water cooling a hub motor. Was some abomination involving some sheet metal with holes drilled in them that covered a bunch of the casting and a whole bunch of silicone caulk. I ground a slot in the shaft just big enough to pass the tube through. Never actually got around to testing the thing.

[Anonymous No.1758143]

>>1758083
>imagining an electric scooter with water-cooling
>current starts flowing through the water
>bubbles start to form so the pump stops working
>windings heat up and start to burn
>hydrogen and oxygen within the motor explodes
>scooter steering tube flies up and impales your chin
marvellous, something more dangerous than lithium ion cells

[Anonymous No.1758156]

>>1758108
Are you saying something like this:
>motor goes to left sprocket
>left sprocket is connected to a shaft that goes through the hole where the crank would go
>shaft ends in right sprocket, which is connected to the bike's rear wheel and gear casette

[Anonymous No.1758167]

>>1758083
>And once again, how are the wires getting to the pic >>1756899 without going through the bearing, and what's stopping me from putting a water pipe or two in through the same way? Or do they just use large bearings? I could always use oilite bushings to be more compact.
Big bearing.
https://www.youtube.com/watch?v=k9-8tPqvDs4
>>1758142
People simply seal the wheel with RTV and pour oil inside.
But there is a small isssue. Magnets become pieces of rare earth metal if temperature rises above 80C, and oil will transfer heat from stator.

[Anonymous No.1758170]

>>1758156
Well that could work, just putting another gear on the crank, but I was thinking of mounting another shaft with two new sprockets on it somewhere unobtrusive in the middle of the frame. Your idea sounds much better actually, though I'd still want the pedals to be an option, so long as you can stop the pedals from moving under motor control with some sort of ratchet that would be perfect.

>>1758167
Thanks for the link, I'll watch it soon. Personally I'd like to avoid filling the thing with oil for friction purposes, and to keep the magnets heating up too much as you've said.

[Anonymous No.1758235]

>>1758167
Oh wow that was a good watch. Those extra-large hub motors that are made to have the battery and driver inside the hub will naturally have a higher tolerance for overvolting, which is good to know.
As for motor driving, I can't help but wonder if there was a better choice than an arduino nano. Like a dedicated driver IC, the kind you'd buy 20 of and would be able to do back-emf or hall-sensing or open-loop, and work for tiny fan motors all the way up to monster BLDCs or even induction motors (for a lathe instead of a VFD I guess). The sort of thing you'd get on a breakout board that plugs into MOSFET breakouts of various current and voltage ratings (or just a single board with spots for soldering custom FETs/IGBTs).

[Anonymous No.1758248]

>>1746805
my coworkers sometimes ask how I ride a normal mountain bike in Canadian winter. HR told me "by not being a bitch" wasn't an acceptable response.

[Anonymous No.1758485]

Any fellow Illinois niggers?

[Anonymous No.1758777]

>>1758248
lmao

[Pöp No.1758842]

>>1748584
Been picking up chicks on my BMX since I was 9

[Anonymous No.1759456]

Why isn't this a general? Maybe for e bikes as well as e scooters and electric skateboards, unicycles, meme wheels and any other diy small electric vehicles?

[Anonymous No.1759508]

>>1759456
Why not another shithole general for a shithole board? One thing diy does best is promote degeneracy along with lunacy.

[Anonymous No.1759512]

>>1759508
Degeneracy? What does any of this have to do with /pol/ shit?

[Anonymous No.1759522]

>>1759512
You obviously didn't read this thread, nor drive a car.