[2stroke] Ryger engine

Dan42 a écrit:: For me, the piston top is conical, like a cup ( female ): the size of the R R ( Ryger name) are différents, the smaller close to the center. The reason? to increase the combustion chamber volume and réduce the compression ratio, other: to center the piston under combustion load?

A mon avis, la calotte du piston est creuse, conique; les R de Ryger sont de taille différente, le plus petit près du centre. Pour quelle raison? augmenter le volume de la chambre de combustion et réduire le taux de compression( si volume de chambre imposé), autre: centrer le piston lors de la combustion ( réduction des forces latérales).
Dan

I am probably wrong, a 2 stroke piston head is flat or conical or slihtly bomb shaped. The Ryger print name is done by an ink- printer machine, its displacement is perpendicular to the piston axis and shorter distance is near the piston center during printing, this gives a smaller R letter.
Dan

Nombre de messages : 98 Localisation : Italy Date d'inscription : 30/10/2012

hi

i think this is the other photo of the piston

[Vous devez être inscrit et connecté pour voir cette image]

Manuel

That's the photo.

Nombre de messages : 22 Localisation : Perth, WA Date d'inscription : 28/12/2012

Fellers, that's the dodgy one from Perth WA.

Nombre de messages : 47 Localisation : Eureka Date d'inscription : 19/01/2013

Ken Seeber a écrit:: Fellers, that's the dodgy one from Perth WA.

Not a bad price either.

I'm assuming that's the size not the price

It seems OK with the patent data, A surprising very thin rod on such powerfull engine ( 70 HP).
Dan

This thread seems to have gone very quiet! Any comments on the piston photo Frits? Is it the real deal or a clever fake?

Concerning the loads on the pin, it's right whith a big diameter, the thickness of the rod leg is surprinsing and looks aluminium ( very light unit for high revs) maybe in MMC ( matrix material component), whithout rollers or plein bearings?
Dan

Howard Gifford a écrit:: Any comments on the piston photo Frits? Is it the real deal or a clever fake?

This still goes Howard:
[Vous devez être inscrit et connecté pour voir ce lien]

You could also take Ken's word for it:

Ken Seeber a écrit:: Fellers, that's the dodgy one from Perth WA.

A simple yes or no would suffice. I trust your word.

Guys, I hope that I have cut the RSA thread at the right place for the Ryger engine...

If not, please, tell me.

[2stroke] Ryger engine - Page 5 980796

_________________
Un p'tit clik vaut mieux qu'une grande claque; c'est Harry qui l'a dit! [Vous devez être inscrit et connecté pour voir cette image]

[Vous devez être inscrit et connecté pour voir ce lien]

Finally!

Hunting pollution is very trendy

Good job, now the house is right, "papa Noêl" will be happy [2stroke] Ryger engine - Page 5 771973

Dan

Nombre de messages : 19 Localisation : UK Date d'inscription : 12/05/2013

Frits Overmars a écrit:

Howard Gifford a écrit:: As I said im not going to repost them but if you look on Kiwibiker one of the photos is still there. It shows the end of the piston with someone holding what appears to be a smaller diameter section
[Vous devez être inscrit et connecté pour voir ce lien]

If you won't, I will, Howard. There are two pictures on the Kiwibiker page you referred to. Below you'll find both of them.
The piston with 'Ryger' written on top is genuine Ryger; the other picture is not.
[Vous devez être inscrit et connecté pour voir cette image]

And while we're at it, here a couple of Ryger cylinders:
[Vous devez être inscrit et connecté pour voir cette image]

And the first picture of the Ryger 125 Revo production run:
[Vous devez être inscrit et connecté pour voir cette image]

Oh, the blanking plate for the old crankcase reed port is more than a blanking plate!

I wonder what's going on in there.

Frits
Do you believe that a conventional cylinder reed race engine (220 cc) that is designed to run at 10500 rpm would make more power at the same rpm if it were "Rygerized" or does the Ryger design just allow the engine to make the same torque at a higher rpm thus making more hp?

I still think that someone went to a lot of trouble to either machine or photoshop the piston photo. Is it even close or it it way off base?
Here is some interesting reading about the Ryger engine I found on Facebook. Hurry before it gets deleted like the other stuff [Vous devez être inscrit et connecté pour voir ce lien]

Nombre de messages : 22 Localisation : Perth, WA Date d'inscription : 28/12/2012

Howard, as I can't seem to post pics (it just doesn't seem to upload after host has been pressed....must be me), I put the pic on facebook This tells the story.
[Vous devez être inscrit et connecté pour voir ce lien]

Ken I dont see anything there
Does anybody have any real news on this engine yet?
Frits does the Ryger engine help performance in the lower rpm ranges. Some of us with CVT drives can't rev to 17000 rpm without having things fly apart.
Would a Rygerized engine make more torque without the high revs or would it be about the same as without Ryger technology?

Howard, I did notice your questions the first time you posted them, but I am reluctant to answer; I might give away information that I'm not allowed to yet. Hopefully we will soon get the go-ahead from the FIA.

We hope...

_________________
Un p'tit clik vaut mieux qu'une grande claque; c'est Harry qui l'a dit! [Vous devez être inscrit et connecté pour voir cette image]

[Vous devez être inscrit et connecté pour voir ce lien]

Nombre de messages : 27 Localisation : nancy Date d'inscription : 25/06/2014

CIK FIA released homologated engines for the year to come 4 months ago ; and the ryger evo 125 engine is listed, see homologation number 40M24.
[Vous devez être inscrit et connecté pour voir ce lien]

Nombre de messages : 12 Localisation : Hellas Date d'inscription : 02/03/2014

Any news on this engine?

50 x engine

url=https://servimg.com/view/19390704/2][Vous devez être inscrit et connecté pour voir cette image][/url]

Nombre de messages : 27 Localisation : nancy Date d'inscription : 25/06/2014

Dracing s'annonce comme le distributeur du moteur Ryger revo 125 pour la France.
[Vous devez être inscrit et connecté pour voir ce lien]

Je n'ai rien lu de neuf dans les différents commentaires.

Surprenant de stocker des moteurs neufs sans bouchon sur la culasse.
Surprisingly all these engines are without head plugs on the shelves.
Dan

» [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)
» Debise champion de France 2008
» [2Stroke] Les MZ & Mr Walter Kaaden
» 2stroke Rotary valve
» 50 cc custom with Yamaha RD 50 engine