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

[LightningRods]

Just installed a set of lightning rod adjustable plates on the GNG I have here. Nice upgrade. Great product. The system is much quieter. I used a single half link on the chain to make it almost the perfect length. Too bad rotating the entire GNG assembly at the bb cups does not tension the chain. The chain is still just a bit too loose to run reliably and it has not had a chance to stretch yet.

Thanks, Mr. Electric. I'm really pleased that you're happy with your adjustable sheets. So far I've shipped them to the U.K., France, Denmark, Sweden, Finland, Israel, Australia, New Zealand, Canada and all over the US.

 

[rp3]

Had a couple of 8km rides today with no pedalling and lots of hills to test out the LightningRods plates. Of course there was no real difference apart from now not having belt dust all over the place. Should really help with belt life.
Most fun I've had on a bike!

...

 

[bzhwindtalker]

Got my plates too (they were at the post office for a few days).
Good packaging and I liked the labels on each part.
I will mount them tomorrow with the 10t and the right bearing block inside. Doing this will allow me to use a short Isis BB, and pedal along better.

 

[borschelrh]

Has anyone tried running this on 36 volts? I noticed in an earlier thread that it was assumed this might get it down into cadence levels humans can pedal at. Any thoughts on what has to be done with the controller to do this? I ask as I am considering a LiMn battery that is 36V/10Ah and I can get 2 for cheap. Otherwise I'll go with 4 Zippy LiPo 5s1p 5Ah packs and run them at 44v10Ah. I need to decide quickly on the battery packs and if this is worth it. The Zippy's shipped here in Europe are pricey at $60.24 ea from the UK plus shipping. From Germany the same packs are 65.99 so it must be a VAT difference. Shipping is probably less from Germany to Hungary. But in either case I avoid the 35% customs duty in Hungary that I would have to pay from China.

 

[Cyclebutt]

Got my plates too (they were at the post office for a few days).
Good packaging and I liked the labels on each part.
I will mount them tomorrow with the 10t and the right bearing block inside. Doing this will allow me to use a short Isis BB, and pedal along better.

Hope you take photos of this mod., sounds interesting. Would like to see.

 

[justlooking]

Got my plates too (they were at the post office for a few days).
Good packaging and I liked the labels on each part.
I will mount them tomorrow with the 10t and the right bearing block inside. Doing this will allow me to use a short Isis BB, and pedal along better.

looking forward to pictures of this of you could

 

[LightningRods]

For my own GNG kit I want to eliminate the tensioner on the secondary chain as well. I've already worked all of the CAD out on it. Now it's just a matter of taking it to the CNC shop and having it laser cut and bent on their metal brake. If anyone else is interested in having an adjustable bottom bracket as well, you are welcome to join me in a run. If we can get ten people together it will be a LOT cheaper. As with my jackshaft adjuster I will be selling these at cost to anyone on E-S that wants a set.

Elevation of the sheets at both ends of adjuster travel. The slide allows about .7" (17mm) of adjustment. Since both sides of the chain run are extended it's a variation of about 1 1/2 chain links. Yes, that is a Lightning Rods logo.

I realized that separating the BB attachment from the motor attachment makes it possible to easily adjust for wider BBs. If the BB sheets are placed outside of the motor plate instead of inside, the width comes out right at 73mm. You still have to solve the bottom bracket spindle problem, but the bracket will fit without grinding on your BB shell.

I animated the CAD model to show a 360 and operation of the slide adjuster:

http://www.youtube.com/watch?v=7H_Q6EPh3q0

 

[TorEddy]

I'm looking for a full suspension bike to use with this GNG kit.
I want approx 160mm of travel to make a fun and versatile ebike, but every bike i find has a 83mm bottom bracket.
Have anybody tried to fit a GNG kit on a 83mm BB?
I'm thinking maby i could make new sheets between motor and bb, but the drive side has to align with the crank, which makes the motor offset:-|
The bike i'm thinking of is this http://www.sicklines.com/gallery/data/534/2009_Commencal_Supreme_Racing_2.jpg
Does anybody have an idea of how to fit this gng kit on a 83mm bb shell?

EDIT: i see you wrote the answer before i could post the question! Good going..

 

[bzhwindtalker]

I installed the plates with the 10t sprocket. Worked very well for 5 min until the axle bent on the pedal side...

 

[Denisesewa]

I installed the plates with the 10t sprocket. Worked very well for 5 min until the axle bent on the pedal side...

The ISIS bottom bracket axle?

 

[melodious]

EDIT: removed.

 

[bzhwindtalker]

The ISIS bottom bracket axle?

No the jackshaft did! I'm Doomed


The ajustable plates removed most of the noise and the 10 drive sproket helps to get a decent cadence at the crank. This mod narrows the drive enough to use a standard isis BB and strong and safe ISIS trial cranks (did't do it yet)
View attachment 3

 

[Denisesewa]

The ISIS bottom bracket axle?

No the jackshaft did! I'm Doomed


The ajustable plates removed most of the noise and the 10 drive sproket helps to get a decent cadence at the crank. This mod narrows the drive enough to use a standard isis BB and strong and safe ISIS trial cranks (did't do it yet)quote]
Wow, didnt expect that, If you ever get a bike together you cant break in a week it will last me the rest of my life! , I think you are on the right track with your new designed bike though.

 

[dbaker]

So the jackshaft bent on the bike drive side where you replaced the small freewheel with a fixed sprocket? The small sprocket looks like it has a lot of wear

 

[Denisesewa]

So the jackshaft bent on the bike drive side where you replaced the small freewheel with a fixed sprocket? The small sprocket looks like it has a lot of wear

looks to me that the wear happened after the shaft bent

 

[dbaker]

ahh, the domino effect

 

[Jackrabbit]

Built my first ebike this week using one of these kits. I used 4 8000mAh 5s batteries in series with a lyen 12 fet controller.

It is super fast (terrifyingly so off road) and has no trouble at all with any hill I've tried to climb. The belt only lasted around 4 miles though! I will have to do a chain conversion for the primary drive and be fairly gentle when applying power and changing gear but I'm very happy with the kit.

 

[Chalo]

It's starting to look to me like the most chronic malfunction in this kit is the loose nut at the handlebars-- believing that you can quadruple the rated output of the system without relentlessly breaking stuff.

 

[Denisesewa]

It's starting to look to me like the most chronic malfunction in this kit is the loose nut at the handlebars-- believing that you can quadruple the rated output of the system without relentlessly breaking stuff.

You have quadrupled the rated BS output of any human I've ever known, Shut up.

 

[Chalo]

"Shut up"? That's a real work of genius, there. What can I say to a non-value-added punkass retort like that?

How about this: "You first!" Am I down to a level you can understand yet?

 

[full-throttle]

Shut up.

But Denise, he is only trying to save us all :lol:

See, deep inside chalo is a martyr. He's purpose in life is to help people.

Every time he opens his bike shop on a miserable cold winter morning he dreams of a word where people ride bicycles. Bicycles that are built to last! Not a single chinese made part. Oh those evil chinese parts, so underdesigned, so cheap.. And nothing that remotely resembles new-tech. Oh those evil corporations, inventing new technologies just to make more money.. When will people understand the joy of simply cruising along the road in perfect synergy?? The smell of salmon brake pads..

Ah

Then a customer walks in and asks for sintered bronze disc pads. Chalo starts routinely explaining that there are much better, virtually fault free brake systems. The customer leaves without waiting for the end of the talk. Chalo's day is ruined. The punch of reality is heavy. He struggles through the rest of the day. Why oh why does no one understand poor chalo.. He works so hard and gets so little in return.

Some believe chalo was bitten by a mad dog once and developed an unusually rare case of rabies called Hydrophobia. Since then he fears things such as - hydraulic brakes, hydraulic suspension, hydro-formed frames, etc..

At the end of the day he goes home to his computer - a portal to the wonders of www. This new tech is the only one that he accepts. It allows him to freely express his thoughts and everyone loves to read his impressions. Well, not everyone. Actually to be honest very few. And even then just to have a good laugh or to ridicule him.

Oh, what's this - there are people riding bikes in an unholy manner. Bouncing up and down on what appears to be some kind of suspension. Disc brakes!? Cheap chinese parts!? THIS MUST STOP

 

[spinningmagnets]

Dear jackrabbit. I see this is your first post. Welcome to ES!

As you can see we are like a family here, and many of us have strong opinions that sometimes result in vibrant discussions. Don't take it personally. You are in the right place...

 

[neptronix]

It's starting to look to me like the most chronic malfunction in this kit is the loose nut at the handlebars-- believing that you can quadruple the rated output of the system without relentlessly breaking stuff.

You have quadrupled the rated BS output of any human I've ever known, Shut up.

Please be adults here people, i don't like using the stick.

 

[Ypedal]

yeah.. there were a bunch of mod reports in this thread, i've closed them all.

can we agree to disagree ?

chalo is right in many things, some dont quite like the choice of words but seriously folks, leave the tutu's behind and discuss without resorting to playground insults please. i'd prefer not to lock this thread.

 

[neptronix]

Sorta back on topic;
If you scroll around you can find instances of this setup dying a quick death on the stock controller. It is absolutely under-engineered. Think about how over-engineered everything else we use is. Our hub motor axles don't shear straight off at double the wattage the motor was designed for. Our bike frames do not snap in half at 35mph. You can push an infineon past it's limits for periods of time. Our wheels don't break from a 4 inch curb drop. All these components have some fudge built into them and this GNG kit has basically none, in fact if someone has one of these kits working long term w/o problems on stock power, i'd be amazed.

You guys have done amazing things to try to get this kit to work proper. I think collectively all of you could come up with a better kit.