New freeride project - LMX P1

[Whiplash]

Nice pics and OUCH! Get well man!

 

[korpin]

you answered me on the phasor form Freeride thank you....really like the frame design........I HAVE A PHASOR (PICTURED) that I am having 104volt 13 ah PACK PUT IN(crystalyte 4065)....it will probably do over 80 KPH but has a hard time climbing and has a lot of rear weight...I think your design in a lightweight aluminum frame and geared rear hub would give a higher high gear for more speed and a lower low for climbing - best of both worlds AND balanced...like the Hinbrink 5 bike but more of a bicycle.....nobody makes a bicycle like that cannot figure out why

 

[eco Sergio]

Adam,

it is great bike, you are cool engineer designer!

 

[bzhwindtalker]

New video, my usual freeride ride
[youtube]PjMqf5LkHCs[/youtube]

 

[jansevr]

very cool! i always look forward to your videos - i know i probably say this every time, but you have a great bike and excellent filming/editing skills! it seems that you have gathered quite the following of people on campus watching you. anyone that is shown any more interest other than watching? that is has anyone asked for advice on building their own bike. riding around, especially like this im sure is a great way of producing interest and publicity for e bikes. it also seems that you have worked out the kinks with your chain and rear sprocket setup. every time i watch one of your videos it only makes me want to build my own mid drive more and makes me wondering why there aren't any mid drive frames available (something like stealth, phasor, raptor, greyborg etc.). hopefully someone soon will produce something like this so those of us without the tools and skills to fabricate it can still slap a motor on and ride one! i still find it hard to believe this is only a 9c clone. i can't imagine what something like a cro motor or one of john in cr's mini monsters or especially a hub monsters would be capable of as a mid drive!

 

[MONSTROHOD]

I liked the reaction of the girl with white jacket

 

[MONSTROHOD]

makes me wondering why there aren't any mid drive frames available (something like stealth, phasor, raptor, greyborg etc.).

Greyborg is a middrive frame, isn't it? There are brackets for middrive motor in it.

 

[r3volved]

I don't thing the greyborg was built to be mid drive. There just happens to be a nice huge fat space to mount a motor setup at the BB
I think all that space was originally designed for max battery space

 

[MONSTROHOD]

I don't thing the greyborg was built to be mid drive. There just happens to be a nice huge fat space to mount a motor setup at the BB
I think all that space was originally designed for max battery space

Originally - it was not built to suit middrive, but well, the current version enables an unequipped builder to build a middrive ebike with the mounting brackets installed within the frame.

BTW, what would a middrive-specific frame look like? I mean, in what way should it be different from battery space oriented frames (such as Greyborg) or stock MTB frames?

 

[stocaz]

New video, my usual freeride ride
[youtube]PjMqf5LkHCs[/youtube]

bzhwindtalker you have personal message,.

 

[littleskull99]

Hi bzh, love the build! can you tell me do you have a freewheel on the motor pinion or a clutch somewhere. If a freewheel does it not try to undo itself used as a drive gear?

edit: just re-read the thread. got it!

thanks
matt

 

[bzhwindtalker]

Some pics :
The photo of the drop is rigth when I broke my swingarm

 

[MONSTROHOD]

Some pics :s rigth when I broke my swingarm

A fraction of a second befor you broke the swingarm

 

[John in CR]

Great work Adam. What did you finally settle on to achieve the throttle response that enables you to ride like in the last video?
John

 

[bzhwindtalker]

Great work Adam. What did you finally settle on to achieve the throttle response that enables you to ride like in the last video?
John

I did not have much time to work on that, but I got somewhat used to it and since I changed the footpegs location the bike is way more stable on wheelies and jumps.

I shot a little video this afternoon but I was really tired and didn't want to push the limits too much I still have chain issues, I tried so many thing without succes that I think it is really time to moove on to the LMX P2 chassis build !
[youtube]V97kFyahhX8[/youtube]

 

[dan974]

what are you chain issues ? breaking ?...

have you try some of that http://www.chainreactioncycles.com/re/fr/s?q=chain+tensioner or MX ones ?

 

[Tench]

New video, my usual freeride ride
[youtube]PjMqf5LkHCs[/youtube]

Loved the vid Adam, i am sure Danny would approve of the music!
The bike looks well sorted now!

 

[full-throttle]

i am sure Danny would approve of the music!

Re-cycled :wink:

Nice videos!

What are the issues with the chain?

 

[bzhwindtalker]

The chain guide is custom made and totaly encloses the chain in a rectangle between a dérailleur wheel and a teflon block. The problem is that the geometry has quite a lot of chain growth over the full travel (170mm+ at rear axle) on violent landings or trials the chain jumps from the rear sprocket and locks the rear wheel, and gets destroyed in the process most of the times...
My #35 chain is also quite shitty, I got it from straton-inc, and is nowhere as strong as my cz made #219 chain as used ont my previous bikes.
I have no issues when riding normaly/street/wheelies and small jumps. It only happens at high loads and almost full travel.
Next bike will either have the motor on the swing arm or concentric pivot!

 

[John in CR]

Chains are going to be an issue until you get the motor on the swingarm or concentric to the pivot. Even if you go without regen and get a really good chainline to minimize changing length, then you're still left with a noisier chain than necessary. Don't forget to lock the motor torque to the swingarm and the pull of the chain will no longer affect your suspension, which is significant with the compliant suspension of such light weight builds and riders.

I want to see you with 15-20kw on tap, but we've gotta come up with a cheap throttle solution. Zombiess Throttle Tamers work fine for regular riding, but the delays and ramp up functions won't really work for your kind of riding. We need the precise control of the Sevcon's without the high price.

 

[MONSTROHOD]

New video, my usual freeride ride

What does the gardener think about this video?

 

[bzhwindtalker]

Don't know about the gardener yet, but in the spring I want to shape a pump track on the campus
I ordered a gng style big block (5,2kg) to swap with the current hub style motor, that will find a second life in a new skimboarding winch.
This time I will fix the motor to the swingaram to be done finnaly with chain issues!! motor : http://e-bike-diffusion.com/index.p...ategorie%26code_cat%3D26%26page_start_num%3D3
Eta : end of the month.
If I'm happy with the motor I will start designing the LMX P2 around it. I hope to be able to make some frames by summer but I need to find a shop where I could work on this, or find someone I could trust to do it for me!

 

[adrian_sm]

The problem is that the geometry has quite a lot of chain growth over the full travel

Just thinking aloud but could you make an active chain idler, that doesn't rely on a spring to take up the slack, but actually moves the idler with a four-bar link type arrangement as the suspension moves.

 

[dirkdiggler]

I ordered a gng style big block (5,2kg) to swap with the current hub style motor, that will find a second life in a new skimboarding winch.

Would you post a thread on this? I was planning on doing the same with a 1000w hub that has broken spokes. I always wanted to make a wakewinch, but never got around to doing it. Bought a real boat instead. I figure a winch from a hub motor would be much easier and lighter than a 5hp gas motor winch. Plus you aren't going to disturb anyone. Weight could be a drawback though. I was wanting to use kiteboard line instead of rope to save space, but can't seem to get decent pricing on bulk line. Harbor Freight in the US has some good deals on decent 2000lb rope also, so might not be worth it.
I would definitely appreciate your feedback and design recommendations as it will be tough for me to get the welding parts done. One of the reasons I gave up before.
Thanks man.

 

[litespeed]

Great videos....again!

Tom