My first ebike build: custom-built KMX-based electric velomobile

"Luck" (or if you prefer, unlucky), is reserved for fools & idiots... I personally prefer 'cause & effect.
I have daughter your age Mr. Gman, and ya know what i've repeatedly told her?... If dear ol' dad's luck ever expires, it's a safe bet he either frocked up, or gave up. Luck will have absolutely nothing to do with it.

Interesting observation... www.youtube.com/watch?v=vqdeZMUZo9k

View attachment 368600View attachment 368601

View attachment 368602


Funny shit. Sorry, I bore easily reading fairy tails.


Ok, I get the picture now.

@Toecutter: My apologies, I'm done here.

And your point is? that recumbent trikes are totally safe to ride at high speed on public roads b/c in your experience luck doesn't exist? so, nothing wrong can ever happen that isn't outside of your control? its always because you flunked up? or b/c you gave up? like... say, getting run over by a distracted driver that is because you effed up or gave up?

So ad-hominem, calling me a fool or an idiot... just because what I am saying doesn't fit your "short sighted" narrative? I have NO reason to lie on this matter on a public forum. FYI, I've been in contact and exchanging many ideas for aerodynamics, efficiency, trike tips, etc etc with @TheToecutter since building my first KMX trike back in 2016... and I have ZERO reasons to lie to my friend about something serious like this. But you? WTF is wrong with you? Your sudden and unwarranted mention of my kid in a public forum is certainly concerning...

Attached is one picture from the aftermath of the wreck... that is how the trike that I spent a whole year building looks like after landing upside down with me inside it due to a rear wheel lock up. Yeah, a "fairy tails"... or did you meant to say "fairy tales"?
 

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I have no problem with this argument existing in my thread. Just be cordial about it. There's valid arguments made by both parties, and anyone reading this thread can learn things from both, even if there is disagreement, and even if I think one individual is more right than the other. That said, Newton's laws always have the last laugh in a wreck.

As far as fairy tales go, I'm a believer in all of the angry pixies crammed into my 72V 25.2AH pack of Molicel P42A. I like to subject them to lots of road vibrations, and torture via the electrical outlet, to make them angrier. The more pissed off they are, the more they move my ass down the road.

As someone obsessed with the occult, demons, magick, and things that cannot be proven in the physical realm or with current scientific understanding of Newtonian physics(although things get a lot more interesting/open-ended in the Quantum realm, especially where entanglement is involved), the concept of "luck" is valid to me. Remove all of the aforementioned, and you can call it "favorable circumstance" or "unfavorable circumstance", and the same point is still made. There's always variables you cannot control in this chaotic universe. My vehicles are meant to embrace this. Any of the high performance machines I create is intended to be a rolling chaos magick ritual, manifest in vehicular form. It's meant for at least occasional hooning, street takeovers, racing, and general overall jackassery on public roads. A means to put a new twist on the spirit of bosozoku.

Three wheels doesn't scare me. I understand and accept the risks that come with it, and from a safety perspective find it highly preferable to two wheels. I've always had balance and coordination issues, and very much prefer static stability when at a stop and prefer the greatly reduced risk of falling off at speed provided by being reclined on three wheels vs being upright on two wheels. Damn do I want four wheels though. The performance benefits that come with four wheels are compelling, nevermind the safety.

That all said, I share the road with 8,000 lb rolling codpieces whose operators are often staring at their ironically-named smart devices instead of the road, so wheel count doesn't matter much if I get pulverized by one at speed. Rear wheel lock and flipping over is not at the top of my list of potential threats, even if it is always kept in mind.

When I upgrade my vehicle to where I want it, it's getting a new name: "Mayhem". I want to give it a rust-colored paint job, a fallout shelter sign as a rear derailleur access hatch, have a big, fat, red anarchy sign sloppily spray painted on the side, pentagram wheel disc covers on one side and the Unicursal Hexagram on the other, a racing number "333" inscribed in a triangle to represent the demon Choronzon, and a silver Baphomet sitting Indian style with its wings spread out and the torch on its head acting as an LED light for the "hood ornament" up front. I want to give it a Mad Max meets witchcraft sort of aesthetic.

If I ever go 4 wheels, the Auto Union Type C V16 streamliner that Bernd Rosemeyer took to 270 mph will be the major inspiration for the body shape. I want slippery, so that maybe I only need 6-8 kW to hold 100 mph on flat ground, but have 25+ kW on tap for acceleration. Four wheels would open up design possibilities and benefits that three wheels didn't allow for, mainly, having no net lift at high speeds, without a drag penalty for achieving it. I can take advantage of ground effects and Venturi tunnels with four wheels, while keeping CdA the same as with the designs possible with three wheels. The fact that the trike kit gman1971 uses for the rear has a narrower track than the front track of the KMX also works well with both a Kammtail design or a side-profile half-teardrop with a underside rear diffuser, leaving ample space on top to place solar panels. With adam333's rear suspension installed on my KMX, the rear end would function as an effective DeDion setup. This idea, should it come to fruition, has the potential to corner like a race car. And unlike some shifter kart, I'd actually have wheels capable of traversing deep potholes on bad roads AND full suspension. Plus I'd have human power and solar power as backup sources of motive force, as well as space to place a small 20cc or so ICE to act as a generator in a series-hybrid setup.
 
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Wassup bud!, long time no post here.. you've been busy!

A word of caution from my "I almost died" personal experience in regards to doing these insane speed test: "you only live once, and its all fun and games until you are dead" trust me, it can happen, and it happens FAST.

.... plus an LSD differential...

Where do/did you find a small Limited Slip Diff suitable for quads?

I like the price and ease of making this diff:
but no LS..?
 
Where do/did you find a small Limited Slip Diff suitable for quads?

I like the price and ease of making this diff:
but no LS..?
Hi there,

The LSD is basically two freewheels coupled together, and so long one wheel touching the ground, you'll have traction, which IMO seems the best kind of diff (not a solid axle) for a lightweight pedal powered vehicle, as you certainly don't want your pedals to feel "unloaded" when/if one wheel goes airborne and loses traction, which is what would happen if you have an open diff.

Here is a link to something that can be purchased, which could give you some ideas...


Hope this helps...

G.
 
I have no problem with this argument existing in my thread. Just be cordial about it. There's valid arguments made by both parties, and anyone reading this thread can learn things from both, even if there is disagreement, and even if I think one individual is more right than the other. That said, Newton's laws always have the last laugh in a wreck.

As far as fairy tales go, I'm a believer in all of the angry pixies crammed into my 72V 25.2AH pack of Molicel P42A. I like to subject them to lots of road vibrations, and torture via the electrical outlet, to make them angrier. The more pissed off they are, the more they move my ass down the road.

As someone obsessed with the occult, demons, magick, and things that cannot be proven in the physical realm or with current scientific understanding of Newtonian physics(although things get a lot more interesting/open-ended in the Quantum realm, especially where entanglement is involved), the concept of "luck" is valid to me. Remove all of the aforementioned, and you can call it "favorable circumstance" or "unfavorable circumstance", and the same point is still made. There's always variables you cannot control in this chaotic universe. My vehicles are meant to embrace this. Any of the high performance machines I create is intended to be a rolling chaos magick ritual, manifest in vehicular form. It's meant for at least occasional hooning, street takeovers, racing, and general overall jackassery on public roads. A means to put a new twist on the spirit of bosozoku.

Three wheels doesn't scare me. I understand and accept the risks that come with it, and from a safety perspective find it highly preferable to two wheels. I've always had balance and coordination issues, and very much prefer static stability when at a stop and prefer the greatly reduced risk of falling off at speed provided by being reclined on three wheels vs being upright on two wheels. Damn do I want four wheels though. The performance benefits that come with four wheels are compelling, nevermind the safety.

That all said, I share the road with 8,000 lb rolling codpieces whose operators are often staring at their ironically-named smart devices instead of the road, so wheel count doesn't matter much if I get pulverized by one at speed. Rear wheel lock and flipping over is not at the top of my list of potential threats, even if it is always kept in mind.

When I upgrade my vehicle to where I want it, it's getting a new name: "Mayhem". I want to give it a rust-colored paint job, a fallout shelter sign as a rear derailleur access hatch, have a big, fat, red anarchy sign sloppily spray painted on the side, pentagram wheel disc covers on one side and the Unicursal Hexagram on the other, a racing number "333" inscribed in a triangle to represent the demon Choronzon, and a silver Baphomet sitting Indian style with its wings spread out and the torch on its head acting as an LED light for the "hood ornament" up front. I want to give it a Mad Max meets witchcraft sort of aesthetic.

If I ever go 4 wheels, the Auto Union Type C V16 streamliner that Bernd Rosemeyer took to 270 mph will be the major inspiration for the body shape. I want slippery, so that maybe I only need 6-8 kW to hold 100 mph on flat ground, but have 25+ kW on tap for acceleration. Four wheels would open up design possibilities and benefits that three wheels didn't allow for, mainly, having no net lift at high speeds, without a drag penalty for achieving it. I can take advantage of ground effects and Venturi tunnels with four wheels, while keeping CdA the same as with the designs possible with three wheels. The fact that the trike kit gman1971 uses for the rear has a narrower track than the front track of the KMX also works well with both a Kammtail design or a side-profile half-teardrop with a underside rear diffuser, leaving ample space on top to place solar panels. With adam333's rear suspension installed on my KMX, the rear end would function as an effective DeDion setup. This idea, should it come to fruition, has the potential to corner like a race car. And unlike some shifter kart, I'd actually have wheels capable of traversing deep potholes on bad roads AND full suspension. Plus I'd have human power and solar power as backup sources of motive force, as well as space to place a small 20cc or so ICE to act as a generator in a series-hybrid setup.
"Get Pulverized" LMAO....
 
Hi there,

The LSD is basically two freewheels coupled together, and so long one wheel touching the ground, you'll have traction, which IMO seems the best kind of diff (not a solid axle) for a lightweight pedal powered vehicle, as you certainly don't want your pedals to feel "unloaded" when/if one wheel goes airborne and loses traction, which is what would happen if you have an open diff.

Here is a link to something that can be purchased, which could give you some ideas...


Hope this helps...

G.

Ah... so the INSIDE wheel thats turning slower is the one getting the power.

Hmmm... no-thx:
That is the wheel that will try and push you into going straight rather than turning in the direction you want to turn in.
(That's especially dangerous for delta trikes)

Putting generators on the pinion gears would be better, if impractical?
 
Ah... so the INSIDE wheel thats turning slower is the one getting the power.

Hmmm... no-thx:
That is the wheel that will try and push you into going straight rather than turning in the direction you want to turn in.
(That's especially dangerous for delta trikes)

Putting generators on the pinion gears would be better, if impractical?
Well the purpose is to let the outside wheel roll faster than the inner, yes the inside will try to push but the outer will increase in speed through the turn. It's main benefit is more of if one speed loses traction vs being sped up as in through a turn
 
...I'd actually have wheels capable of traversing deep potholes on bad roads AND full suspension. Plus I'd have human power and solar power as backup sources of motive force, as well as space to place a small 20cc or so ICE to act as a generator in a series-hybrid setup.

Got a link to that suspension?

20cc...? That's changed!? :)
You were talking 5-6hp IIRC.

The issue is at those cc's the surface area of the combustion chamber to cc ratio sucks and you lose a lot of efficiency to wasted heat.
IIRC you're looking at ~7-8% at that cc vs 30% for a car sized engine.

I wouldn't go below 40-50cc at the smallest (7hp in my Honda MBX IIRC)
b1_engine_01_360x.jpg

That's a water cooled 40cc RC engine. ( with a casing for the generator/starter! :) )
Water cooled is quieter and adds a heater when and where you want it.
Skin cooling via co opted frame tubes becomes possible.
Or a Meredith Effect? style duct and use the hot air and exhaust gas to fill the vacuum behind a cam tail.

Besides the best power to weight/size ratio the oily exhaust of a 2 -stroke means the frame tubes can be co opted yet again, as an exhaust.
With built in Quarter Wave Resonator/s cancelling CONSTANT rpm frequencies...!
You set the length to max amplitude's frequency. (then add more/others?)
Weight and some Stealth..! :)
QWR T.jpg
https://www.researchgate.net/public...GFnZSI6Il9kaXJlY3QiLCJwYWdlIjoiX2RpcmVjdCJ9fQ


I would probably add the 40-50% power/efficiency a tune pipe gives, also as part of the frame.
Apparently when working at max, they make the exhaust quieter too!..?
Maybe a 'Muffler-Centrifuge' doodat as both oil and soot particles are way denser than gas, for no smoke stealth and to keep the bunny huggers happy. :)
 
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Got a link to that suspension?

http://kmxsuspension.epizy.com/?i=1

adam333 on this site sells them.
20cc...? That's changed!? :)
You were talking 5-6hp IIRC.

Just brainstorming. I need to keep mass in check. The ICE would possibly never be used even if I installed one, just because of how uncommon the need to use it would arise. The idea is to make an apocalypse-ready vehicle I could live out of, and have as many ways to propel it as possible. If the electric grid were to ever go down, it won't be so easy to find a place to charge, but ethanol or methanol fueled ICE or a seed oil fueled diesel would make it possible for one to make/scavenge fuel for it. And you wouldn't need much: it would be trivial to carry enough fuel on board to cross a continent.

So I'd have the following propulsion systems:
-electric motor(s)
-pedaling

...and could use the following fuel sources:

-solar
-grid electricity
-regen (pedal it up a mountain with EV system disabled, recharge on the way back down)
-food
-ethanol/methanol/gasoline (if ICE)
-diesel/propane/kerosene/motor oil/seed oil/brake or transmission fluid (if mechanical-injection diesel)

All kinds of ways to keep my ass going down the road at car-like speeds.
 
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I have one of those, with a centrifugal clutch housing I got from Staton Inc, but which I never put into service. It was only 750W peak after all!
 
Ah... so the INSIDE wheel thats turning slower is the one getting the power.

Hmmm... no-thx:
That is the wheel that will try and push you into going straight rather than turning in the direction you want to turn in.
(That's especially dangerous for delta trikes)

Putting generators on the pinion gears would be better, if impractical?
Well, the flip side is that on an open diff the pedaling effort will vary due to the "unloaded wheel" getting all the torque... so if you lift one wheel of the ground, you are dead in the water. This is the only way to go, and I tried an solid axle, and that was SCARY... plus it chews rear tires like there is no mañana...
 
@The Toecutter
Ideally if we could, something like the Curiosity Mars rover power source would be the ultimate post-apocalypse ride... but alas... :)
 
In regards to the KMX front suspension, I have three, since 2016, and like TheToeCutter I have thousands of miles on these and they are absolutely rock solid... they survived the trike flipping after the wheel buckled...

No experience with the rear suspension, but if the front suspension quality is of any indication, the rear is probably just as solid.

@adam333

G.
 
The rear suspension is very solid, but if you drill the holes even slightly off, you could weaken the frame more than you would want to.
 
Well, the flip side is that on an open diff the pedaling effort will vary due to the "unloaded wheel" getting all the torque... so if you lift one wheel of the ground, you are dead in the water. This is the only way to go, and I tried an solid axle, and that was SCARY... plus it chews rear tires like there is no mañana...
I hear ya. :)
So the ideal diff as always, is a limited slip diff.

As the pinion gears only rotate fast when one wheel loses traction; putting strong torquey generators on them would be ideal...
But that adds a lot of weight and size for something hardly ever working..?

Perhaps magnetizing the whole damn pinion gear with coil/s close-by would give a modicum of Limited Slip with little in the way of added size and weight.

BTW; If you want to quad off-road, these have 'a little bit' of wheel travel...
AND lean! I likes lean! :)
Wesll Technologies is behind them.
 
http://kmxsuspension.epizy.com/?i=1

adam333 on this site sells them.


Just brainstorming. I need to keep mass in check. The ICE would possibly never be used even if I installed one, just because of how uncommon the need to use it would arise. The idea is to make an apocalypse-ready vehicle I could live out of, and have as many ways to propel it as possible. If the electric grid were to ever go down, it won't be so easy to find a place to charge, but ethanol or methanol fueled ICE or a seed oil fueled diesel would make it possible for one to make/scavenge fuel for it. And you wouldn't need much: it would be trivial to carry enough fuel on board to cross a continent.

So I'd have the following propulsion systems:
-electric motor(s)
-pedaling

...and could use the following fuel sources:

-solar
-grid electricity
-regen (pedal it up a mountain with EV system disabled, recharge on the way back down)
-food
-ethanol/methanol/gasoline (if ICE)
-diesel/propane/kerosene/motor oil/seed oil/brake or transmission fluid (if mechanical-injection diesel)

All kinds of ways to keep my ass going down the road at car-like speeds.

Hmmm-ok! :)

Some 26cc water cooled engines.
2-Stroke Engine Hobby RC Gas/Nitro Engines for Gasoline Boats & Watercraft for sale | eBay

for many reasons (repairability, safety) I'd still use a chrome molly steel tube frame doing double duty as skin cooling and quarter wave silenced exhaust tho. :)
Covered with this stuff.

If you want to multi fuel a spark ignition engine, fuel Pyrolysis (Heating/gassifying fuels, using waste exhaust heat) is is easiest.
Forget all the 'magic-smajic' talk. That's basically simple, easy Pyrolysis (and some Partial Oxidation in this case)
generally that would be the fuel carb, with a large air valve for O2.
That guy wont be pulling away and driving around with that, but constant rpm...

Constant rpm makes timing for various fuels easy, various compression ratios and 2-stroke lubrication; not so much.
Low compression 4-stroke; heavy/big. So 🤷‍♂️
 
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Yes, LSD on bikes is also the best... open diff doesn't get respite HAHAHA

LMAO... the quad handles mild offroad fine, but for a full offroad pedal quad I would go full independent suspension with 24" fat tyres... ($$$$$$$$)
Limited offroad is okay, and I've just added a 24x48" ABS black sheet as a floor to start building something around it... yet to be determined what that is... but something...

The one-way bearing simplicity is just unrivaled... but the price to pay is no regen.... however, you could weld a couple of 5 bolt pattern disc to the axles and use that to mount a chain to drive a couple of generators.

G.
 
Steel IMO is the best material (for cost) for something that will need to resist fatigue... if money wasn't an issue, I'd say Titanium frame... but alas... $$$$$ $$$$$$$$ $$$$$$$$$$$$$$$$$$$$$....
 

I would say that if you are looking for the ultimate burn anything engine a modern equivalent of these Lohmann Variable Compression Ignition Engines, with a Pyrolysis System (using waste exhaust heat and a bit of catalyst: zinc, copper) is the answer.

You can pyrolyze just about anything (perhaps even carbohydrates/sugars!) and the variable compression means you can set it to run.
As its constant rpm; there would be some initial fiddling with compression and pyrolysis system settings, but constant rpm is 'set it and forget it' until you change fuels.

There are more preferable ways of changing compression IMHO as the sliding sleeve used in the Lohmann design is likely to overheat before producing a decent power to weight ratio.
 
Do you still have that same plastic shell on the kmx or did you change it around?
I still have it. It's in very rough shape from the tens of thousands of miles put on it in all weather conditions, plus it was rear-ended at a stoplight(and later repaired), and is no longer sturdy as a result. I will be making a new shell to accommodate 4 wheels instead of 3.
 
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I still have it. It's in very rough shape from the tens of thousands of miles put on it in all weather conditions, plus it was rear-ended at a stoplight(and later repaired), and is no longer sturdy as a result. I will be making a new shell to accommodate 4 wheels instead of 3.
How do you plan to legally get away with 4 wheels?
 
I still have it. It's in very rough shape from the tens of thousands of miles put on it in all weather conditions, plus it was rear-ended at a stoplight(and later repaired), and is no longer sturdy as a result. I will be making a new shell to accommodate 4 wheels instead of 3.
Been a couple of years where have you been, :D. What's up with the grin motors? You thinking a going quad?
 
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