Your Creation's Before & After Pics

[Stevil_Knevil]

..Jeez, and he pulled-off a one cross spoke pattern with a 400 series motor in a 16" rim.. You ARE Jedi!




Ride Bikes. Drive Culture. -S
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[BiGH]

holly crap the bike on the right - in the cylinders - they're painded battery holders right? thats druel worthy.

Man i really gotta get my bike design sorted!

Those are the mufflers...

they look like sportsbike mufflers...but then again there is a rear hub motor and the black section of the muffler is going to the bike frame... i think they're battery holders Lowell

[TechBikes]

TechBikes,
Cool bikes
Could you please show some close up pictures of how you mount battery? Construction details?

Hi Marty,
I'm part through a video of the construction of all of this - keep an eye on the Forum, I'll post it on Google Video when it's ready.

[knoxie]

Hi

Some great pics there and yes Steves bikes look great!! esp as they both have triple clamp forks now, the battery boxes are brilliant and up close they look well professional.

Ypedal the Norco looks great it really does have a military look about it!!

My main ride is ugly but its a utility machine a commuter, my BMX has a certain cool factor as does the KMX, I do intend to build a super nice full suss rig along the lines of these bikes when I get the time.

Steves little DM bikes are such good fun to ride, they would sell by the bucket load I am sure.

Cheers

Knoxie

[BiGH]

Hi

Some great pics there and yes Steves bikes look great!! esp as they both have triple clamp forks now, the battery boxes are brilliant and up close they look well professional.

Ypedal the Norco looks great it really does have a military look about it!!

My main ride is ugly but its a utility machine a commuter, my BMX has a certain cool factor as does the KMX, I do intend to build a super nice full suss rig along the lines of these bikes when I get the time.

Steves little DM bikes are such good fun to ride, they would sell by the bucket load I am sure.

Cheers

Knoxie

i think a large reason as to why they look good tho is the paint theme that he's done! i'm intending on my bike to go the black stealth look all black can't wait!

[Deepkimchi]

So here it is with a backdrop of a rice field. Ordered my 5304 motor on 26" rim, 36-72V controller plus misc wiring from PoweRide - almost $900 with shipping. Now just have to find a Li Po4 battery and charger .

[Mark_A_W]

Another before shot - soon to be Mark's Mark II E-bike

A Jamis Dakar XC Comp.

I have a front hub wheel but am undecided if I want to fit it (I'll start a thread).

When the "after" is ready I'll add a pic to this thread.

[geoff57]

Hi all
here is a picture of my latest project before conversion. it has one of the worst riding positions for a pedel cycle I have ever seen, but as an E-bike for pure motor power with pedels just to keep the law at bay, it will be perfect.The rear wheel is 4.25 " wide and was screaming for a hub motor, so I've given it one a PUMA with a single cross.
The bike should be ready riding within a week.

[erdurbin]

[ChopperMan]

Hi All,

I have been lurking for the last week and thought this was the ideal place for my first post. The photos below show the before and after of my first build completed about two months ago. It's based on a geared 250W chinese scooter motor and 24V 18ah Gel Batteries.

I hacked the frame in half with an angle grinder and welded in a subframe to support the new drive train and give it a very comfortable stance.

Top speed is currently geared for about 14mph and I get 12 miles range so far. I haven't pushed it to it's limits yet as there are some long steep hills around my home no matter which direction I go!

It wasn't until I was finished that I realised it might not be road legal in the UK, no pedals, but as my legs don't work properly (I haven't used a push bike in ten years) it didn't even occur to me to keep the pedals.

I have since been stopped by the 'plod' but only to ask how I made it!


I hope it gives all you hub motor demons a good laugh..... but it did only cost £200 to build. Next project will be using a Puma!!!

Many thanks.

[fechter]

I love the before pic.

As long as the welds are strong, you can always 'beautify" them later.

Too bad about the pedal requirement. It might be possible to add some. They don't have to be optimal, since they're only for looks.

In fact, if it appeared like you were pedaling, I bet they would never notice if they weren't connected to anything.

[dirty_d]

hey the law just says working pedals, i guess if they only spin they still work

[Uplink]

Here is the now bike... First test ride today, so it's still a work in progress. BMC Puma motor, 37v. 15AH Point 1 LiPO battery, 58 pounds loaded, 253 pounds with my fat ass on it.

[ChopperMan]

Here is the now bike... First test ride today, so it's still a work in progress. BMC Puma motor, 37v. 15AH Point 1 LiPO battery, 58 pounds loaded, 253 pounds with my fat ass on it.

Hi Uplink,
How did the test ride go ? That's a great setup, exactly what I'm building. Although I'm less generous is the ass department, my all up weigth will be similar as my frame is considerably heavier.
Also, can I ask where you got your Lipo's?
Again, great looking project, very BLING!
Cheers,

Ian

[Uplink]

ChopperMan - I described the test ride in another post here:
http://endless-sphere.com/forums/viewtopic.php?t=2052
although since that post I realized I didn't start with a fully charged battery. Battery arrive from the dealer (EV Tech) at 39 point something volts - full charge is more like 42 volts. Redo tomorrow! (yea!)

[EVTodd]

Hi all! I've been lurking for a few days and thought I would post up a couple shots of my first project code named Ghetto Electric v1. I'll get my asbestos suit on to protect me from the flaming I'm going to get about this one. lol

These are 'after' pictures but it isn't too hard to imagine the 'before' version. Sorry for the poor photo quality, it was getting a bit dark when I took these.



My original plan was some kind of hub motor but I got my hands on a new Kollmorgen for very little $$$. I decided to do a little playing around with some parts I already had around the garage and came up with a simple friction drive.

I started with a EV Warrior clutch roller bearing and machined a larger knurled roller for it (since the Kollmorgen doesn't have as high of rpms as the original ev warrior motors). I then made a simple aluminum frame to hold the motor to the rear rack and a bearing support so the Kollmorgen's bearings don't get too much load.

I need to make a couple of little supports from the rack to the top rack frame mounts to ensure the whole assembly never moves to one side. The roller actually centers itself but I would hate to hit a bump at speed and have the motor slide into the tire.

I must say I was very very surprised with the results. The friction drive works very well (I never ride in the rain, btw). I've used the bike daily for quite a while now (over 400 miles since converted). I'm currently using two 7ah sla batteries and get around 12 miles per charge with moderate pedaling and one decent size hill on my daily route. I really don't see too much of a downside to the friction drive. It doesn't need to be plastered on the tire to give a good amount of assist so I don't see it being that inefficient and I haven't noticed any tire wear since I've used it (yes the tire in the photo is a bit worn but it's getting old and it's not from the roller).

Top speed is 16mph and I'm shooting for 20. The next project will be a 36v external controller to raise the motor rpms. Then I can reduce the size of the roller a bit to make hill climbing even better.

Is there anyone else here using friction drive?

[Ypedal]

Hey now that's excellent !! well done !

amazingly simply i must say, this would transfer to another bike very easily, makes for a quick-on quick-off setup !

I'd like to try a friction setup with 2 rollers and a belt, with a big large contact patch on the tire instead of a single roller ( for jack-rabbit takeoffs ).

Great job !

[EVTodd]

Thanks for the kind words ypedal!

I'm not sure you would ever really need two rollers and a belt. If you adjust the roller a bit tighter you can accelerate rather briskly with one roller.

I keep mine on the loose side just to avoid burning up the wimpy stock controller and I'm still amazed by how much torque it has.

[xyster]

Hi all! I've been lurking for a few days and thought I would post up a couple shots of my first project code named Ghetto Electric v1. I'll get my asbestos suit on to protect me from the flaming I'm going to get about this one. lol

Hey, it's an EV (in other words, "not a gasser" -- so no asbestos necessary here ) and it sounds like it's working great, in a compact, modular design incorporating spare parts too.

This may not pertain to your expectations, but if that system was mine, I'd be wondering how well the friction drive elements would scale to higher wattages -- say, 2,500 watts. And also if the drive would slip on steep hills, in wet conditions, when riding over bumps, or similar such potentially friction-reducing situations. Perhaps a sheath over the roller, made of rubber, or other soft, sticky compound could help?

[EVTodd]

Xyster,

I've tried this setup on some pretty steep hills and it worked very well, of course, with only 24 volts you can't stomp on it and fly up a huge grade but if I feather the throttle it pulls very well without the roller slipping.

Friction drive pretty much sucks in the wet. I've tried it and it works ok if you tighten the roller but I really don't like riding in the rain anyway so that's not a big issue with me.

2500 watts!?! I would like to try it! I imagine I would have some tire wear with that kind of power! lol

It would probably still work if you had some self control and pedaled first.

Actually, my big concern (other than the motor or mount slamming into the tire) is how much torque the roller bearings can take. Maybe I'll add an extra bearing for each 12v battery I add.

[fechter]

Nice job! I bet it's quiet too.

To increase the voltage you'll need an external controller. The bearings should be fine.

If the internal controller ever blows, you'll have a good excuse to go for an external controller.

How does the roller attach to the motor shaft?

[EVTodd]

fechter,

It is indeed very quiet.

The roller isn't really attached to the shaft at all. There is a hardened steel pin that goes through a clutch bearing in the roller (which is the bearing I fear might not be able to handle a ton of torque). The roller simply floats on the pin. It's great because it freewheels when you're not using the motor (or if you pedal faster than the motor) and feels like a normal bike.

The hardened shaft has steel adapters on each side of it that are a bit of a press fit with split pins that go through the shaft. One adapter is attached to the motor shaft with a set screw and the other rides in the support bearing.

I do know about the need for an external controller above 24 volts. I'm actually looking for one right now. Anyone know of a cheap 36 volt controller other than crystalyte? I have to stay within the 'ghetto' theme so I'm trying to keep the $$$ low.

[Freddyflatfoot]

EVTodd,
Good work! Simplicity at its best.
Have a look at solarbbq, he has a good selection of assorted e-bike parts,
Rob

[fechter]

I recently saw a cheap brushless controller on the forum here, but I can't remember what thread that was in.

They have a relatively cheap one at:
http://www.goldenmotor.com/

If you got the really cheapest POS one you could find and upgraded the FETs, it might actually work well. Even in stock form, if it has enough current to slip the roller, you wouldn't gain much by upgrading it. Around 30 amps is the most that motor will take anyway.

[OneEye]

Unfortunately the other end of sales@goldenmotor.com is currently fickle in responding to e-mail. They seem to be focused on selling their wares in bulk on the mainland, so sales through the website are treated as a hobby for whenever they feel like answering. I keep a presence on their web forums and I haven't heard too many complaints about controllers failing, but they seem to be having some significant quality control problems with the hubmotors themselves (and issues with damage in-transit). We're all hoping they clean up their act.