Large homemade scooter

Show off your E-Scooter or Motorcycle creation here.
Scootdan   10 W

10 W
Posts: 75
Joined: Mar 19 2021 2:37am

Re: Large homemade scooter

Post by Scootdan » May 12 2022 5:17pm

Mr. Dui, ni shuo de dui, you just made my day sir. Thank you for the comment and I am a huge fan of yours brother. There is so much to read here on ES I have only gotten to a little of it, but I have skimmed your three builds and they are awesome. You have great style and unbelievable skills! Your current bike rear light is amazing and your first scooter is off the charts. Also someone was bitching about another guys build and you handled it so cool brother and said “let’s not feed the trolls “ That was awesome. I get tired of guys being so critical of others hard work and big risks it takes to build something. I really appreciate you sir so when you say well done it really means a lot.
As far as the power of this beast, you could handle it. Just like no first time motorcyclist should try and ride a super bike or big Harley, this beast is not probably not a good first scooter! I just added a new video you can see at the link above and it is short, but you can see how stable it is coming down the street. I know it may look really dangerous, but it doesn’t feel or act that way at all. It feels very safe to to me because it has some very real safety advantages. Number one is VISION! I can see so much more riding the beast because my eyes are about 7 ft in the air. It is so awesome to see over the cars and small trucks on the road brother. I had a close call as a young motorcyclist when I was almost wiped out by a car coming from the side I could not see. Also running two fat rear tires gives a big contact area for monster BRAKES. Just like all bikes it will stop way faster than cars, but this thing stops very fast. The POWER is the thing that in untrained hands could be insanely dangerous. Not just the amount, but how differently it handles in 2wd. As you know mid motor is better in many ways for bikes because hub motors add weight where we don’t like it, and also a lot of gyroscopic effect. Not so bad on a scooter though, weight stabilizes the deck , and wheels are small so gyroscopic effect is easily overcome and helps stabilize small wheels.
So the biggest difference I feel between my beast and a bike is the weight and gyroscopic effect of a front wheel with a big hub motor. It is very different and definitely takes some getting used to. I am just learning how to use it brother, but it I really like. I got to ride the biggest, fastest Dualtron scooter and absolutely fell in love with the feel and handling of 2wd. I just built my first ebike and made it 2wd also! After living with it for a few months I could not go back to 1wd. It is not perfect, especially with hub motors, but I find the overall handling is far superior to 1wd, at least for a commuter bike. I read a guy say he tried a 2wd bike and he didn’t like it because it ‘pulled him right off the path’ and I am sure he’s right. I found, once I got the skill to adjust to the difference, my front wheel could often pull me back onto the path. I think you have to get past the steep part of the learning curve and that can be painful or at least boring to most. I got pulled off the path a few times at first, but now I have more control on my bike as 2wd vs 1wd. Now it is charge, ride, repeat as much as possible to try learn how to ride this baby! You can tell a good rider who has put in the time and miles , like you Mr. Dui, because they become one with the machine. They make a huge mega heavy, mega powerful super bike look light and nimble as a feather. You could easily do that with my big beast and feel really safe and secure on it like I am starting to now, if you just practiced on it. Best regards brother and thank you again. :thumb:
Heavy

User avatar
Chalo   100 GW

100 GW
Posts: 10402
Joined: Apr 29 2009 11:29pm
Location: Austin, Texas

Re: Large homemade scooter

Post by Chalo » May 12 2022 9:02pm

Promise us you'll tell us if the fork breaks off (if you can).
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

Scootdan   10 W

10 W
Posts: 75
Joined: Mar 19 2021 2:37am

Re: Large homemade scooter

Post by Scootdan » May 13 2022 12:11am

Man Chalo I hoped you would leave me alone, but I guess that’s you. I was just saying how you were bitching at someone else’s build and here you are bitching at mine. Seems you were too tempted when I said out loud it bugged me a lot. I have learned a lot from you here, how to lace a hub motor, how trikes work, and lots from your extensive bike and ebike experience and I thank you for that. I don’t like your attitude and I respectfully ask you not to comment on my projects and I will not comment on anything you post. If we can’t be civil, just tell me and I won’t come here anymore. Seems a shame to be so smart and use it to, so smartly and oh so cleverly, to put people down. I couldn’t tell, are you rooting for or against Rivian? Daniel Burnham.

User avatar
Chalo   100 GW

100 GW
Posts: 10402
Joined: Apr 29 2009 11:29pm
Location: Austin, Texas

Re: Large homemade scooter

Post by Chalo » May 13 2022 1:08am

I don't want your creation to lose; I want it to win. But from where I stand, all the blanks that haven't been filled in by your photos have to be very much in your favor to offset some of the challenges that are obvious.

One of my Seattle bike clubmates built a tall chopper from a garment rack hoop, with a fork something like five feet long. It was cool, but it made me wince to see it. On its maiden voyage (the annual downhill race through the streets), he made it most of the way to the finish... but not quite all the way. The fork broke off and he broke an arm. I wanted him to pull it off, but that's not how it worked out on the day.

In your case, I'm hoping the ingenuity we don't see outweighs the problems that we do see. Please tell us if it works out, but also please tell us if it doesn't.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

User avatar
Dui, ni shuo de dui   10 kW

10 kW
Posts: 685
Joined: Jan 29 2016 3:21am

Re: Large homemade scooter

Post by Dui, ni shuo de dui » May 13 2022 1:44am

Thanks for the very nice comment mate, made my day too! :D
Main reason I say it looks insanely dangerous is because of the gigantic amount of power this powertrain could deliver.... :shock: Right now you're still gently cruising at low power, but if you were to tune both APT controllers to their max ratings I don't see how it would be physically possible to remain on the thing, and 'm not even joking cuz you'll have way, wayyyy more than 1G of acceleration :shock:

Anyway, sounds fun (and I wish I could try that), but when you crank up the power don't forget to wear proper motorcycle gear, just in case. Talking from experience there :wink:

I Like the tub frame that you've made, is it still plywood or did you replace it with some other material? I'd be interested to see how its been made, it looks clean :thumb:
Also a bit more pictures of the front fork assembly and some explanation about how you built it would be awesome!
Just one thing disturbed me on the pictures: is your steering column an aluminum rod? I suppose not, but the pictures make it appear so, at least on my screen.
Chalo wrote:
May 12 2022 9:02pm
Promise us you'll tell us if the fork breaks off (if you can).
Would be more productive to explain where and why you believe the fork should break and how you suggest to fix it. :wink:
:bolt: New Build in Progress: Electric Roadster, 30 000W Kelly KLS72701, 24S2P A123 cells :bolt:
viewtopic.php?f=12&t=109246

:bolt: My electric Ninja 250 clone: 16 000W Sabvoton 72200 Unlocked, 23S2P A123 cells : :bolt:
viewtopic.php?f=12&t=90032

:bolt: My electric Scooter: 16 000W Sabvoton 72200 Unlocked, 72V 20Ah 24S1P A123 cells: :bolt:
viewtopic.php?f=12&t=75912

Scootdan   10 W

10 W
Posts: 75
Joined: Mar 19 2021 2:37am

Re: Large homemade scooter

Post by Scootdan » May 13 2022 4:07am

You are the man Dui. Yes I agree even an experienced rider might not be able to handle these motors maxed out, but it has never been my plan to do that. I am more after a capable luxury cruiser than any kind of race machine. I really only want a max speed of about 75mph for this scoot. As you know these motors/controllers could easily take this beast over 100 with the right battery, but not with me on it! Today I got just under 50mph with my 72v 100a battery, so really I think I might settle around a 96v 300a battery. That should be plenty snappy and still, just barely!, be safely controllable. I just hope I can keep the super quiet ness and awesome sound of these motors. I really love riding virtually silent. Good advice on the riding gear. That always goes with big speed for us old guys. My dad used to say when you see someone on a motorcycle with a t shirt and sandals it means they haven’t really fallen, yet. I have been a little reluctant to post many pics here anymore because some guys just seem to want to snipe what I do. People that don’t even know what my scoot is made of, much less how it is made, insinuating it will fail? I would happily go over every detail of how I made every little part and help anyone who wanted to build one. I just think I am all done posting here in public, but I will, hopefully, still come here to read stuff. If anyone really wants info on my scoot feel free to private message me. Thanks all.

User avatar
Dui, ni shuo de dui   10 kW

10 kW
Posts: 685
Joined: Jan 29 2016 3:21am

Re: Large homemade scooter

Post by Dui, ni shuo de dui » May 13 2022 4:39am

haha, just ignore the haters man, it's a cool build so it would be a shame not to see more of it.
:bolt: New Build in Progress: Electric Roadster, 30 000W Kelly KLS72701, 24S2P A123 cells :bolt:
viewtopic.php?f=12&t=109246

:bolt: My electric Ninja 250 clone: 16 000W Sabvoton 72200 Unlocked, 23S2P A123 cells : :bolt:
viewtopic.php?f=12&t=90032

:bolt: My electric Scooter: 16 000W Sabvoton 72200 Unlocked, 72V 20Ah 24S1P A123 cells: :bolt:
viewtopic.php?f=12&t=75912

SlowCo   10 MW

10 MW
Posts: 2110
Joined: Jan 05 2015 5:43pm
Location: The Netherlands

Re: Large homemade scooter

Post by SlowCo » May 13 2022 7:48am

Dui, ni shuo de dui wrote:
May 13 2022 4:39am
haha, just ignore the haters man, it's a cool build so it would be a shame not to see more of it.
+1!

SlowCo   10 MW

10 MW
Posts: 2110
Joined: Jan 05 2015 5:43pm
Location: The Netherlands

Re: Large homemade scooter

Post by SlowCo » May 13 2022 7:52am

To make it a little bit more controllable you could always add a seat. Making it more like those fat wheel scoots you see sometimes:

Fat wheel scoot.jpg
Fat wheel scoot.jpg (211.2 KiB) Viewed 109 times

User avatar
Chalo   100 GW

100 GW
Posts: 10402
Joined: Apr 29 2009 11:29pm
Location: Austin, Texas

Re: Large homemade scooter

Post by Chalo » May 13 2022 1:29pm

Dui, ni shuo de dui wrote:
May 13 2022 1:44am
Chalo wrote:
May 12 2022 9:02pm
Promise us you'll tell us if the fork breaks off (if you can).
Would be more productive to explain where and why you believe the fork should break and how you suggest to fix it. :wink:
You did see that the forks are held onto the steer tube with glue and pieces of plastic, yes?

Here's one of the ways I joined fork blades to an incompatible frame:
redfront~2.JPG
redfront~2.JPG (77.74 KiB) Viewed 97 times
I suppose I could have made a steer tube, then glued the entire fork (including its steer tube) to the bottom end of it, but that's not how I did it.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

User avatar
Dui, ni shuo de dui   10 kW

10 kW
Posts: 685
Joined: Jan 29 2016 3:21am

Re: Large homemade scooter

Post by Dui, ni shuo de dui » May 14 2022 3:08am

Chalo wrote:
May 13 2022 1:29pm

You did see that the forks are held onto the steer tube with glue and pieces of plastic, yes?

No, I did not.
On the picture"2280D56B-4230-419D-8393-9A592AD1B3AD.jpeg" you can see what looks like welds between the steering colum, the transversal part and the bike forks. But I agree the pictures aren't super clear. Personnally I assumed the yellow color came from bondo, to smooth it a little, same way I did on my frames, but that it's welded metal under that. I do hope it's steel though, forks and steering column are under tremendous forces, especially when meeting potholes or under strong braking. Breaking the fork is probably the worst failure that can happen on a bike :?

But I guess even pictures are up to interpretation, better let the OP explain his building method before telling him he's wrong and you're right.
Thing is, right now I don't know how it's been built and I don't believe anyone knows yet aside from the OP.
:bolt: New Build in Progress: Electric Roadster, 30 000W Kelly KLS72701, 24S2P A123 cells :bolt:
viewtopic.php?f=12&t=109246

:bolt: My electric Ninja 250 clone: 16 000W Sabvoton 72200 Unlocked, 23S2P A123 cells : :bolt:
viewtopic.php?f=12&t=90032

:bolt: My electric Scooter: 16 000W Sabvoton 72200 Unlocked, 72V 20Ah 24S1P A123 cells: :bolt:
viewtopic.php?f=12&t=75912

Scootdan   10 W

10 W
Posts: 75
Joined: Mar 19 2021 2:37am

Re: Large homemade scooter

Post by Scootdan » May 19 2022 11:29am

https://youtube.com/channel/UCvTLuu3y0VRnxlLN5Az9dGw. I am loving putting a few miles on this beast. Thank you ES guys for so much good info.. :bigthumb:
Attachments
B2033074-816A-4090-9A80-06FA27C4B446.jpeg
B2033074-816A-4090-9A80-06FA27C4B446.jpeg (2.7 MiB) Viewed 30 times
E531F248-6077-4420-9B99-695376FDC36C.jpeg
E531F248-6077-4420-9B99-695376FDC36C.jpeg (1.72 MiB) Viewed 30 times

Scootdan   10 W

10 W
Posts: 75
Joined: Mar 19 2021 2:37am

Re: Large homemade scooter

Post by Scootdan » May 19 2022 12:53pm

Thanks Dui and Slowco. I do have some perspective designs for removable seat and cargo racks down the road. I actually feel with this monster, a seat may be more comfortable, but I have more control of the vehicle when standing. If you see the riding videos I think you will see what I mean. I totally concur with you Dui on the critical nature of the front forks on any cycle. That is really scary so I always try to overbuild those parts. Please note these pics of my battle axe 2wd ebike I just finished. I obviously rebuilt the forks, which originally featured ‘shocks’. I had to make them stronger than stock because I was adding a hub motor and dual brakes. Of course, like most, I stress test all I built and ride on before I ride on it. I gave these forks lot’s of test before I would trust my life with them at 33mph. Now they have almost 300 miles, and lots of unexpected pot holes on them and they are rock solid. Amazing what you can build with tissue paper and Elmers glue!🤣 Also I really fear speed wobble. I am old enough I might not have been able to bounce right back from the crash you suffered Dui. Both my bike and my monster scoot are anti speed wobble vehicles. They are both like riding two big gyroscopes! It takes some getting used to the difference, but I will never go back. I just want more batteries, and more glue! The monster scoot is begging to go faster.
Attachments
630220E3-FE55-400A-8AD4-F31B1ACE782D.jpeg
630220E3-FE55-400A-8AD4-F31B1ACE782D.jpeg (6.7 MiB) Viewed 29 times
D4543586-28E5-4F19-84B7-92866E2D742C.jpeg
D4543586-28E5-4F19-84B7-92866E2D742C.jpeg (5.64 MiB) Viewed 29 times
3536611D-13A9-4A9F-8EE4-E03B42DD9D16.jpeg
3536611D-13A9-4A9F-8EE4-E03B42DD9D16.jpeg (2.38 MiB) Viewed 29 times

Post Reply