GNG, 1000W 48V BB-drive, $400

[E-Norco]

I want one too.
It might be better to set up a European and a North American group because of shipping and customs costs.

 

[Denisesewa]

[. A single rear coaster brake on a two wheeler with over 10 horsepower on board seems like a very bad idea.

The rear coaster brake was a bad idea for 1 people power

 

[silence]

I want one too.
It might be better to set up a European and a North American group because of shipping and customs costs.

+1 to European group buy.

 

[bee]

I have been shopping for FS frames that pivot at the BB and have an adjustable rear wheel dropout for a single speed setup. I think this is the perfect design for running high power through the GNG kit as it allows you to run power through the right side without a derailleur/idler, or you can put a derailleur on the right side and have a two stage reduction on the left side going through the BB that doesn't require any chain idlers.

So far these two have caught my eye:
http://www.blackmarketbikes.com/index.php?option=com_blackmarketbikes&view=category&Itemid=4&id=2&cid=5
http://www.ns-bikes.com/soda-slope,61,pl.htm

Only problem is that neither of them has a 100mm BB

 

[LightningRods]

I want one too.
It might be better to set up a European and a North American group because of shipping and customs costs.

+1 to European group buy.

As much as I'd love to be the center of all of this fun it probably makes more sense for people on other continents to get together and do their own group motor buys. Motors are just so heavy and expensive to ship.

Here is the link on Mister Tao that finally worked: http://www.mistertao.com/beta/pages/item/16360173272.html

If you try other vendors you may get a wide case motor that has a narrower armature and stator in it. My friend Antonio ordered a 500 watt motor thinking he would get a GNG motor. A wide case motor arrived that was in between the typical GNG motor and the big block that I have. It weighed 3.3kg, the center case was 72mm wide and the end case was laser etched "48V580W". The big motor from the link above weighs just under 5kg, has a center case width of 87mm, and the end case is laser etched "48V1100W".

I will be making adjustable sheets for this largest of the big motors. If you want reduction and to tie into the derailleur through the BB you will need a wider jackshaft and housing to match the width of the motor. I'll also be making aluminum billet bearing housings and steel jackshafts in the standard width and 100mm wide to match up with this monster motor.

If you do order from Mister Tao, don't start bugging them at one week about "where is my order?" I got my order cancelled and 'refunded' twice because I started bugging them at a week. I finally got the order to go through by placing it and being quiet. After two weeks the vendor finally got the motor to Mister Tao.

I'm excited to see what people do with this motor. Kin and I are going to do a mid drive with reduction on his beautiful Versus Weapon X FS bike. He has already started a build thread here : http://www.endless-sphere.com/forums/viewtopic.php?f=6&t=32963 Kin is a very talented guy. He scratch built his own CNC mill and will be making a lot of one-off custom parts for this build. I'm starting on the CAD for the sheets this weekend.

Mike

 

[Tinto]

I have been shopping for FS frames that pivot at the BB and have an adjustable rear wheel dropout for a single speed setup. I think this is the perfect design for running high power through the GNG kit as it allows you to run power through the right side without a derailleur/idler, or you can put a derailleur on the right side and have a two stage reduction on the left side going through the BB that doesn't require any chain idlers.

So far these two have caught my eye:
http://www.blackmarketbikes.com/index.php?option=com_blackmarketbikes&view=category&Itemid=4&id=2&cid=5
http://www.ns-bikes.com/soda-slope,61,pl.htm

Only problem is that neither of them has a 100mm BB

Those both look great.
You can add the Kona Cowan DS to that list if you're not opposed to a 2nd hand frame.
However also doesn't have a 100mm bb.

 

[Mitch3514]

i'll be getting 2 shipped to Victoria, Australia. if there are any other Aus buyers here i'm happy to do a group order

LR what controller would you recommend for pushing this motor to max on 20s?

good find!

mitch

 

[Whiplash]

Hey guys, just got the Conhismotor version of this kit installed on my little brothers bike. It came with a throttleAND the pedelec sensor but the throttle does not seem to work. I did not want the pedelec so I didn't install it. The only way it would run is if I simulated the pedelec spinning by manually moving the sensor past the magnets, then it worked fine just can't get the throttle to work. Its one of their new LCD displays for the dashboard its cool and offers up speed and voltage, any ideas of how to bypass the pedelec sensor and get the throttle to work???

Thanks!
Bryan.

 

[skyungjae]

Hey guys, just got the Conhismotor version of this kit installed on my little brothers bike. It came with a throttleAND the pedelec sensor but the throttle does not seem to work. I did not want the pedelec so I didn't install it. The only way it would run is if I simulated the pedelec spinning by manually moving the sensor past the magnets, then it worked fine just can't get the throttle to work. Its one of their new LCD displays for the dashboard its cool and offers up speed and voltage, any ideas of how to bypass the pedelec sensor and get the throttle to work???

Thanks!
Bryan.

Make sure one of the three pins on the throttle harness connector isn't smashed up against the side of the housing when you plug them together. Even after this occurs and you pull the connectors apart, the bent pin will still look mostly straight.

Also, how does it detect speed? I'm assuming it has a sensor and a spoke magnet.

 

[Whiplash]

I am not sure of the speed sensing, possibly they forgot to send the magnet/sensor..

 

[Whiplash]

Thanks for the tip!

 

[bzhwindtalker]

+1 for euro group buy

 

[mwkeefer]

For anyone interested I have 2 of these GNG 1000w 48v BB drives available - I paid the $400 or $380 asking price, then I paid for $125.00 or more for EMS Shipping to ensure no damage upon arrival.

1 of the units is brand new (v1) and has not been installed (so New in Boxes or New Old Stock), the second unit I used for about 480-500 miles to test it out and it was fantastic with the stock controller or a lightly tuned 6fet ed lyen controller but sadly I could no longer fold the bike I installed it on a full size Dahon Jack (which I found out quite to my surprise when needing to transport it in a taxi trunk one day, can't believe I didn't realize it wouldn't fit.

All the parts - original controller, plates, belt, throttle, sprockets, etc are there but it could use maybe a coat of paint/sealer - or just cleaned well enough.

In addition to these parts I have one set of adjustable lowers from Lightning Rods available also which I purchased but never installed (would have made the folding worse).

Sadly I have drive systems (hubs and RCs) which handle my needs so I am letting these go, figured I should post here first - if your interested in either kit or the arms send me a PM, the following are my asking prices:

1.) New in box, uninstalled GNG v1.0 with stock controller, throttle, all hardware, freewheeling bottom bracket - I may not have the eBrake cut off handles, but I have others I would include which would be compatible. Price: $350.00 USD + Domestic US Shipping at Cost (not much, low as about 10.00), buyers choice of shipping method.

2.) Lightly used complete GNG v1.0 with approx. 480-500 miles of use on a Dahon Jack 26" folder 7 speed. Maximum Voltage Attempted 15S or 55.5 (keeps under stock cap and fet limits) maximum current applied 26A over the stock 20A - Fantastic condition and ready to be installed on your bike. Price: $275.00 + S&H (buyers shipping choice).

3.) The adjustable lowers from Lightning Rods for the v1 GNG 48v 1000w - if sold with one of the above motors I want 1/2 of retail price if sold without I will accept 2/3 of retail - they are in perfect condition and were never used.

Again PM me if your interested in any of these kits - they go to the sale route on Tuesday afternoon

Hope this helps someone in need who doesn't want to risk the intl shipping or waiting for a large order.

Regards,
Mike Keefer
mwkeefer

 

[skyungjae]

728 miles. Anyone got more miles on their first belt? :wink:

 

[Tinto]

1171.6km?
Unless someone has a faulty throttle and theirs actually runs at 450w, then that title is likely to be yours for a LOOONG time.

That's a decent 20% tooth strip job though!
My first one stripped (like yours) , second one snapped, third one cracked, half snapped then stretched...

Now I take off with a lot more effort in the pedalling before I throttle on and it hasn't skipped yet.
...but it's much less fun.

 

[meelis11]

728 miles. Anyone got more miles on their first belt? :wink:

I am almost in similar range right now
About 1160km=725miles I probably beat you when belt survives my commute home today
I am not driving it agressively + have filed off sharp edges from belt sprockets. Keeping stock tensioner so more teeth are engaged.

How long your chain last?

 

[spinningmagnets]

Finally got some data on a bone-stock kit before mods, many thanks to Julian in hilly San Francisco. The testing area is a 1.2 mile long uphill with grades from 17% to 22% (VERY steep). Julian was asked to find the highest gear where the motor seemed to easily maintain speed. A lower gear would have a lower speed, but the motor would run cooler (like downshifting a car), a higher gear and the bike would bog down and the motor/controller would get hotter.

With added pedaling, the stock kit can take a 22% grade at 13-MPH, with no danger of overheating.

Weight of rider: 200-lbs
Diameter of wheel: 700c
Voltage of system: 57V no load, 53V loaded
Max amps controller puts out on hill: the full 22Amps
Steady speed achieved on uphill: 13-15mph
13-15 MPH achieved with 44T/21T gear (9-speed sprocket cluster, 21T is 3rd gear)
Motor slows down enough that I can pedal along with it, and I did.

The controller and motor stabilized at barely warm with normal air-flow at 1.1kW (1100W)

Julian plans to swap-in a 52T chainring on the secondary (44T:52T = 17% improvement in reduction), raise the amps on the stock controller shunt, and retest.

 

[Whiplash]

These really are an excellent little package for the money! Can't go wrong! Especially with lightning rods parts!
Here is the conhismotor version. I comes with a little LCD display that shows speed, actual voltage, and distance traveled etc. Pretty cool for $400 shipped to the USA in 4 days!

 

[r3volved]

These really are an excellent little package for the money! Can't go wrong! Especially with lightning rods parts!
Here is the conhismotor version. I comes with a little LCD display that shows speed, actual voltage, and distance traveled etc. Pretty cool for $400 shipped to the USA in 4 days!

How do you like their version? I was looking into this one for my next project...for the LCD and PAS...do they work well?
I'm using a standard gen1.1 now on my first bike.

 

[skyungjae]

I'm still curious how the conhismotor version detects speed. The pictures of the LCD don't show any spoke magnet/sensor.

 

[Whiplash]

Its a little screwy they use the motor halls, so you can only use the speedo in one particular gear but its not bad and really accurate I just set it for 4th...

 

[Whiplash]

Its a nice package for a total investment of $1100.00 including shipping! That's WITH the brand new bike too!

 

[LightningRods]

I got my test 3D print back on the 90 tooth GT2 pulley today. I took a cross section of just the drum to test the fit on the GT2 belt. The pattern fits perfectly! If these big pulleys don't fit the belt exactly right the belt will mesh with the teeth for a few teeth and then start to come off of the pulley. It has to be dead nuts on pattern. This drum fits the belt perfectly for a full 360 degrees. On to the final full pulley.

 

[spinningmagnets]

Wonderful news! I'm not just happy about the pulley-set, I'm also excited that you have researched the different methods for making something like this, and have published the results for others to follow when making new parts for E-bikes that have not been invented yet!

 

[LightningRods]

Wonderful news! I'm not just happy about the pulley-set, I'm also excited that you have researched the different methods for making something like this, and have published the results for others to follow when making new parts for E-bikes that have not been invented yet!

You can make just about anything that you can imagine today. There is 3D printing in all kinds of materials, 3D milling, laser cutting and then all of the old school machining and casting processes that can be combined with all of the new tech. It's a great time to be designing and building.