My next bike

burn1986
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burn1986
Edited Date/Time 10/19/2013 3:20am
Completely sweet machine. Can you imagine how fun this bike would be on a regular MX course. The Carbon Fiber would probably crack after 1 moto, but it would be a blast until that happened.

http://motocross.transworld.net/1000153962/features/inside-units-skycra…
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Grizz
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Grizz 10/18/2013 7:01am
10/18/2013 7:01am
How do you figure the carbon fiber would crack after 1 moto? Are you high?
newmann
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newmann 10/18/2013 7:30am
10/18/2013 7:30am
That 787 Boeing has caught on fire, had exterior panels come off in flight and who knows what else but it still hasn't cracked open. It might be just fine. There are quite a few ideas I've had about dirt bikes that seem to be on that bike. Parts that serve double duty and everything else that has been simplified and minimized. I like it. I would have made the silencer serviceable and as part of the airbox/subframe/seatbase. Rear suspension would have been air too.
burn1986
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burn1986 10/18/2013 9:42am
10/18/2013 9:42am
It would be cool if it didn't. You remember that super light CR125 some years back that was all carbon fiber? The fenders and number plates started chipping on the first couple of rides.
mikem
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mikem 10/18/2013 9:51am
10/18/2013 9:51am
burn1986 wrote:
It would be cool if it didn't. You remember that super light CR125 some years back that was all carbon fiber? The fenders and number plates...
It would be cool if it didn't. You remember that super light CR125 some years back that was all carbon fiber? The fenders and number plates started chipping on the first couple of rides.
If I remember correctly they tested it for a magazine at Red Bud and it was muddy. As soon as some mud built up under the fenders the added weight caused them to snap off. First ride.

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yota
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yota 10/18/2013 9:52am
10/18/2013 9:52am
I think if there were problems it would be from impacts, steel against the cf.
burn1986
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burn1986 10/18/2013 10:06am
10/18/2013 10:06am
burn1986 wrote:
It would be cool if it didn't. You remember that super light CR125 some years back that was all carbon fiber? The fenders and number plates...
It would be cool if it didn't. You remember that super light CR125 some years back that was all carbon fiber? The fenders and number plates started chipping on the first couple of rides.
mikem wrote:
If I remember correctly they tested it for a magazine at Red Bud and it was muddy. As soon as some mud built up under the...
If I remember correctly they tested it for a magazine at Red Bud and it was muddy. As soon as some mud built up under the fenders the added weight caused them to snap off. First ride.
Yeah, I would think that would happen here in a full on MX moto. I couldn't see carbon fiber holding up, especially the shock mounts and swingarm.
Socket946
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Socket946 10/18/2013 10:54am
10/18/2013 10:54am
Cf can be as strong or weak as you'd like; that's not the problem. The issue is it being brittle, and "shearing" forces that go against the way it's laid up. The only problem is the one they're having in bicycles; it just isn't durable. All it'll take is 1 time hitting the dirt or a rock, and that frame will have holes in it. FMX guys are known to hit the ground, and when they do, it's VERY, very hard. Mix in brittle carbon fibre, and it'll be a catastrophe.

I wonder what the deal with the silencer is....
Skerby
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Skerby 10/18/2013 11:01am
10/18/2013 11:01am
newmann wrote:
That 787 Boeing has caught on fire, had exterior panels come off in flight and who knows what else but it still hasn't cracked open. It...
That 787 Boeing has caught on fire, had exterior panels come off in flight and who knows what else but it still hasn't cracked open. It might be just fine. There are quite a few ideas I've had about dirt bikes that seem to be on that bike. Parts that serve double duty and everything else that has been simplified and minimized. I like it. I would have made the silencer serviceable and as part of the airbox/subframe/seatbase. Rear suspension would have been air too.
Give it ten years. Those pieces of shit are gonna be hitting the ground like lawn darts.
peelout
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peelout 10/18/2013 12:14pm
10/18/2013 12:14pm
at least they didn't scrap the entire look of a light badass machine by throwing a farm-tractor-turd motor in it
mnomis97
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mnomis97 10/18/2013 12:30pm
10/18/2013 12:30pm
I am pretty sure that it would survive a real race. I mean, it was built to be a very light FMX bike. if it would crack after a small jump, they would not present it to the media. It has a KTm enige, frame probably even build by ktm too
burn1986
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burn1986 10/18/2013 12:38pm
10/18/2013 12:38pm
250 I'm guessing. Either way, it'd be fun to throw it around a little.
dcg141
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dcg141 10/18/2013 12:42pm
10/18/2013 12:42pm
You know that is a KTM engine right?
BAMX
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BAMX 10/18/2013 12:51pm
10/18/2013 12:51pm
newmann wrote:
That 787 Boeing has caught on fire, had exterior panels come off in flight and who knows what else but it still hasn't cracked open. It...
That 787 Boeing has caught on fire, had exterior panels come off in flight and who knows what else but it still hasn't cracked open. It might be just fine. There are quite a few ideas I've had about dirt bikes that seem to be on that bike. Parts that serve double duty and everything else that has been simplified and minimized. I like it. I would have made the silencer serviceable and as part of the airbox/subframe/seatbase. Rear suspension would have been air too.
Skerby wrote:
Give it ten years. Those pieces of shit are gonna be hitting the ground like lawn darts.
Comparing the two is funny. Any one part on the 787 has more engineering than that whole bike.
philG
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philG 10/18/2013 3:29pm
10/18/2013 3:29pm
Carbon fibre just isnt the material for this , is has zero compliance and first crash , the subframe will be toast..

Sure it will be light ,but its a about a crash proof as a goldfish bowl .

And MX would kill it , any application where high shock loads are the norm will render it useless in no time , and without the correct kit to crack test it , you have no way of knowing if its cracking or not.


Looks cool though
mx836
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mx836 10/18/2013 4:51pm
10/18/2013 4:51pm Edited Date/Time 10/18/2013 4:51pm
Grizz wrote:
How do you figure the carbon fiber would crack after 1 moto? Are you high?
Ever had a carbon fiber 4-stroke exhaust? They don't last long. Works pretty good for the hood on my Bimmer though.
lostboy819 10/18/2013 6:05pm
10/18/2013 6:05pm
burn1986 wrote:
Yeah, I would think that would happen here in a full on MX moto. I couldn't see carbon fiber holding up, especially the shock mounts and...
Yeah, I would think that would happen here in a full on MX moto. I couldn't see carbon fiber holding up, especially the shock mounts and swingarm.
Yeah , that's why they build so much of a F1 car out of carbon fiber, because it wont hold up.Woohoo
mx_563
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mx_563 10/18/2013 6:17pm
10/18/2013 6:17pm
What is the purpose of routing the front brake line on the outside of the fork leg?
burn1986
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burn1986 10/18/2013 7:36pm
10/18/2013 7:36pm
lostboy819 wrote:
Yeah , that's why they build so much of a F1 car out of carbon fiber, because it wont hold up.Woohoo
I guess. It would be cool if it would. It would be cool even if the frame and swingarm was alum and everything else was carbon fiber, with the weight around 180 lbs.

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bRaDzAs$
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bRaDzAs$ 10/18/2013 7:57pm
10/18/2013 7:57pm
Are they gonna get an fmx rider to do a demo or at least a few jumps on that thing? Or is it just a useless ornament?
nytsmaC
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nytsmaC 10/18/2013 8:14pm
10/18/2013 8:14pm
philG wrote:
Carbon fibre just isnt the material for this , is has zero compliance and first crash , the subframe will be toast.. Sure it will be...
Carbon fibre just isnt the material for this , is has zero compliance and first crash , the subframe will be toast..

Sure it will be light ,but its a about a crash proof as a goldfish bowl .

And MX would kill it , any application where high shock loads are the norm will render it useless in no time , and without the correct kit to crack test it , you have no way of knowing if its cracking or not.


Looks cool though
They've been using CF subframes in the GP's for years.
philG
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philG 10/18/2013 11:34pm
10/18/2013 11:34pm
burn1986 wrote:
Yeah, I would think that would happen here in a full on MX moto. I couldn't see carbon fiber holding up, especially the shock mounts and...
Yeah, I would think that would happen here in a full on MX moto. I couldn't see carbon fiber holding up, especially the shock mounts and swingarm.
lostboy819 wrote:
Yeah , that's why they build so much of a F1 car out of carbon fiber, because it wont hold up.Woohoo
have you seen an F1 or Indy car shatter when it hits something ,,,, the aluminium honeycomb composite frame will be fine but all the rest will shatter like a light bulb.... i have worked in F1 , and i have thrown more carbon fibre parts away than you can ever believe.. and thats stuff that LOOKS fine but fails Eddy current tests.

last time i looked , F1 cars didnt have to jump 40Ft in the air..

MX subframes out of carbon fibre is daft too , same as fuel tanks , Dean Ferris had a small crash in front of us at the GP and split his carbon tank .... i have never ever seen a plastic tank fail.
lostboy819 10/19/2013 12:19am
10/19/2013 12:19am Edited Date/Time 10/19/2013 12:29am
burn1986 wrote:
Yeah, I would think that would happen here in a full on MX moto. I couldn't see carbon fiber holding up, especially the shock mounts and...
Yeah, I would think that would happen here in a full on MX moto. I couldn't see carbon fiber holding up, especially the shock mounts and swingarm.
lostboy819 wrote:
Yeah , that's why they build so much of a F1 car out of carbon fiber, because it wont hold up.Woohoo
philG wrote:
have you seen an F1 or Indy car shatter when it hits something ,,,, the aluminium honeycomb composite frame will be fine but all the rest...
have you seen an F1 or Indy car shatter when it hits something ,,,, the aluminium honeycomb composite frame will be fine but all the rest will shatter like a light bulb.... i have worked in F1 , and i have thrown more carbon fibre parts away than you can ever believe.. and thats stuff that LOOKS fine but fails Eddy current tests.

last time i looked , F1 cars didnt have to jump 40Ft in the air..

MX subframes out of carbon fibre is daft too , same as fuel tanks , Dean Ferris had a small crash in front of us at the GP and split his carbon tank .... i have never ever seen a plastic tank fail.
Last time I checked MX bikes didn't go 190 mph and bounce off curbs on hard pavement.you can't really compare the two as they do completely different things. You can make carbon fiber as flexible or as ridged as you need it to be but now cost is a whole different story. F1 cars are made to shatter and dissipate the force of the crash that is why they shatter. Lightspeed makes tons of cool carbon fiber and I have never had anything split or shatter not even a glide plate. Now as that free style bike is concerned I think that is more show than go as I doubt any of the carbon fiber on that bike is worth doing , but it does look cool.
harescrambled 10/19/2013 3:20am
10/19/2013 3:20am
MotoGP teams don't use carbon fiber wheels because they were collapsing at speed....something to do with harmonic vibrations.

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