[Moto2] Kalex

Sujet: Re: [Moto2] Kalex Ven 9 Nov 2012 - 16:05

Si c'est le cas (cadre à cadre) c'est un montage vite réalisé, deux brasures, deux filets dans le cadre et zou!
Ajustement précis, une rotule pas à droite, l'autre à gauche.

Sujet: Re: [Moto2] Kalex Ven 9 Nov 2012 - 18:44

chriss #333 a écrit:: Je crois que les kawa de BAz et Sykes ne sont pas en Ohlins non plus.

Pour la biellette, qu'elle aille du cadre au cadre je peu comprendre, mais du cadre au moteur, en biais, dans un seul sens...ca m'apparait comme "étrange".

Exact, les Kawa sont en Showa.
Pour les biellettes, je pense aussi que c'est du "cadre au cadre" et cela me fait penser à la Mistral, qui soit dit en passant possède cette "rigification" de par sa conception :

[center] chassis - [Moto2] Kalex - Page 3 41918910

chassis - [Moto2] Kalex - Page 3 41918910

Sujet: frame details kalex chassis Ven 18 Jan 2013 - 16:25

some first hand obtained frame details from the kalex moto2 frame for the 2013 season:

frame parts:

main frame weight (without swingarm): 8.5 kg

swingarm (+ bearings) weight: 4.2 kg

swingarm length (middle of adjustment) = 55 cm

straight line between middle of headstock and swingarm pivot = 73cm.

I might be able to obtain some pictures in the near future chassis - [Moto2] Kalex - Page 3 809516

extra:

rear wheel rim + disc = 3.1 kg

complete fuel tank (+ heat resistant foil) = 2.2 kg.

there is carbon fibre on the inner side of the front engine mounts but it looks to be there only for heat protection!

GRTZ

MJ

Sujet: Re: [Moto2] Kalex Ven 18 Jan 2013 - 16:48

The swingarm is shorter than I expected... I'm starting to believe that in fact the SV650 is the greatest bike ever built, it has the same length swingarm chassis - [Moto2] Kalex - Page 3 998726

Looking at photos, the Moto2 swingarms all look very thin in the spars, not much more than 25mm thick: does that seem right from close up?

And a 2.2kg tank, 1.3mm aluminium?

PS after the Marquez/Monlau discussion, I see that they were not the only ones to use a ceramic coated exhaust...

PPS that rear wheel wait is very, very low. I have a pair of BST carbon wheels: the rear with sprocket carrier and a wave-type disc is about 5.7kg. I think the disc is about 600g, which would make the wheel itself 2.5kg, about the same as a BST front!

Sujet: Re: [Moto2] Kalex Ven 18 Jan 2013 - 17:03

Thanks a lot, MJ!

chassis - [Moto2] Kalex - Page 3 771973

Sujet: Re: [Moto2] Kalex Ven 18 Jan 2013 - 17:11

Indeed it is very short, I also thought that. I'll keep you posted on the thickness of the spars.

My own fuel tank is only 8 liters (don't know how much the moto2 tank is), made from 1.5mm 6082 alloy and weighs 1.5 kg so I think the 1.3mm might be right, if not it's even thinner!

About your wheel: I have a standard aprilia rs250 rear wheel (4.5") and that's 4.8 kg without the sprocket carrier. I expected the BST wheel to be much lighter?

The 3.1 kg of the moto2 wheel was also without the sprocket carrier I believe (don't remember scratch

). 2.5 kg without the disc sounds realistic for this wheel, it felt like it was made from air! (in reality it's magnesium off course Razz

)

Marc a écrit:: Thanks a lot, MJ!

you're very welcome!

Sujet: Re: [Moto2] Kalex Ven 18 Jan 2013 - 17:21

GrahamB a écrit:: PS after the Marquez/Monlau discussion, I see that they were not the only ones to use a ceramic coated exhaust...

CIP Technomag used also a ceramic coated exhaust...

chassis - [Moto2] Kalex - Page 3 980796

Sujet: Re: [Moto2] Kalex Sam 26 Jan 2013 - 15:08

The promised photo's! The frame with the dots tec7 (to hold the carbon fibre in place) is the 2012 version. the other ones are 2013 kalex.
Pleas do not put them on other websites only for pit-lane!

click on the pictures for full size, they are not compressed chassis - [Moto2] Kalex - Page 3 771973

2012

chassis - [Moto2] Kalex - Page 3 P1160310

chassis - [Moto2] Kalex - Page 3 P1160311

chassis - [Moto2] Kalex - Page 3 P1160312

chassis - [Moto2] Kalex - Page 3 P1160313

chassis - [Moto2] Kalex - Page 3 P1160314

chassis - [Moto2] Kalex - Page 3 P1160315

chassis - [Moto2] Kalex - Page 3 P1160316

chassis - [Moto2] Kalex - Page 3 P1160317

chassis - [Moto2] Kalex - Page 3 P1160318

2013

chassis - [Moto2] Kalex - Page 3 P1160319

chassis - [Moto2] Kalex - Page 3 P1160320

chassis - [Moto2] Kalex - Page 3 P1160321

chassis - [Moto2] Kalex - Page 3 P1160322

because you people were talking about the coated exhaust:

chassis - [Moto2] Kalex - Page 3 P1160323

GRTZ

MJ

Sujet: Re: [Moto2] Kalex Sam 26 Jan 2013 - 17:57

Thank you so much, MJ!
Gorgeous!

I will copyright them.
chassis - [Moto2] Kalex - Page 3 771973

Sujet: Re: [Moto2] Kalex Sam 26 Jan 2013 - 23:24

Thank you for editing the pictures chassis - [Moto2] Kalex - Page 3 771973

Invité

Thanks a lot MJ-Works to give us the primacy of those pictures. chassis - [Moto2] Kalex - Page 3 771973

Invité

Sujet: Re: [Moto2] Kalex Dim 27 Jan 2013 - 23:05

Sujet: Re: [Moto2] Kalex Lun 28 Jan 2013 - 12:54

Merci MJ-Works chassis - [Moto2] Kalex - Page 3 771973

Sujet: Re: [Moto2] Kalex Lun 28 Jan 2013 - 14:14

MJ-Works a écrit:

J'ai l'impression que derrière la douille de direction, au moins, on ne veuille pas trop de flexion...

they are starting to build up the bike Wink

chassis - [Moto2] Kalex - Page 3 734313_10151469373591779_382533062_n

Nombre de messages : 315 Localisation : bzh Date d'inscription : 03/09/2011

Belle photo , en plus on voit bien la biellette en travers du cadre .

Thanks, Marteen!

Cette biellette, à priori moins costaud que le renfort sur la Tech3 Mistral, offre néanmoins l’avantage théorique de pouvoir être changée pour en changer la rigidité (l'élongation, dans le cas présent).

I think it is being used to change the lateral flex of the frame. On circuits with fast corners (circuit of the americas will be interesting) on high lean-angle they will put less tension on this so the frame will flex more and give more grip for more confidence in the fast corners. Not sure but that's what I think!

I think you are right. chassis - [Moto2] Kalex - Page 3 241515

Nombre de messages : 19 Localisation : Belgique Date d'inscription : 11/11/2012

Magnifique :-)
Dire que ce bon Klaus H. a fait ses armes sur son ZXR 750 91 chassis - [Moto2] Kalex - Page 3 771973

Quelqu'un connait une adresse pour le traitement ceramique de l'echappement (France-Allemagne ou Benelux)
Ca m'interesserait grandement vu que mes echappement passent super près de mon radiateur additionnel (ZX10 08)
Je me demande d'ailleurs si cela resiste a l'essence ? Ce serait une solution pour les bas-carter de 2 temps (isolations chassis - [Moto2] Kalex - Page 3 55116

)

MJ-Works a écrit:: I think it is being used to change the lateral flex of the frame.

I'm not so sure. Because it is horizontal, it will still allow the frame to flex sideways relative to the front engine mounts (which are impressively hollowed out from behind). It would need to be diagonal to stop that.

On the other hand, it would stop the frame from spreading, which is what it would tend to do under heavy braking, where the bottom of the steering head will be pushed back.

GrahamB a écrit:

MJ-Works a écrit:: I think it is being used to change the lateral flex of the frame.

I'm not so sure. Because it is horizontal, it will still allow the frame to flex sideways relative to the front engine mounts (which are impressively hollowed out from behind). It would need to be diagonal to stop that.

On the other hand, it would stop the frame from spreading, which is what it would tend to do under heavy braking, where the bottom of the steering head will be pushed back.

You might indeed be right! But wouldn't it have any effect on the horizontal flex? I think it has the "same" effect as making the engine mounts shorter if you know what I mean.

Sujet: Re: [Moto2] Kalex Mer 16 Oct 2013 - 22:48

Je ne comprend pas l’impact de la petite tige en M6 (ou M8 au mieux) sur la rigidité du châssis?
il faut comparer la section d'alu du cadre et / ou moteur à ce pseudo renfort. psychologique scratch

?

Faire travailler une tige ou tube cylindrique en compression=> flambage direct.
en traction, c'est mieux. Mais dans tous les cas, ce montage est limité en raideur par le fait que ce sont les vis des rotules qui fléchissent en premier (elles travaillent en flexion).

Je pense que quelque chose nous échappe

Sujet: Re: [Moto2] Kalex Mer 16 Oct 2013 - 23:14

Je pense qu'il s'agit ni plus ni moins d'un montage ayant le même but que celui de Guy Coulon avec la Mistral, en plus adaptatif et, oui, très probablement beaucoup moins rigide.

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