ESE's works engine tuner

[Muhr]

At last I've got all measurements of the ports in place! It's amazing how much time you need to get all angles and area in place. Thank you Frits for the amazing library of pictures and drawings you posted on the RSA and RSW over the years.

Does anyone have any tips or experience regarding the design such as wall thickness or the like?

[WilDun]

this is all good stuff , thanks for sharing

Mr B, - mate you could have said that easily with one line, we didn't need to have the whole bloody scenario all over again, once was enough!
I say put it all to rest and lets get on with the thread as it should be, it was going well!

Now go and answer MUHR's question!

[Muhr]

Obviously you do quite a lot Same as with the Ryger - mucho blabla to convince people of your amazing achievings. you have to be a great guy to hang out with...


I'm using 15 mm on my 50cc. Diameters below that value killed overrev, the engine was hard to jet and build up heat like crazy. So far I'm not sure if the increased backpressure is needed.

This is 14,7mm

[dutchpower]

This is 14,7mm

Yes smaller as 16 mm is worse

[chrisc]

This is 14,7mm

KTM SX?

[Muhr]

KTM SX?

No that piston i from a Malossi

[jonny quest]

Scooter friends. I have a 2001 Aprilia Ditech Morini. I'm looking for a big bore cylinder that has ability to go 50mm. 47mm is max off the shelf 70cc kit. I know I'll have to bore cases for bigger than 47mm.

Problem is I'll need a cylinder that a Ditech head will fit. Do you know of any cylinder that I could use?

[F5 Dave]

Mr B, - mate you could have said that easily with one line, we didn't need to have the whole bloody scenario all over again, once was enough!
I say put it all to rest and lets get on with the thread as it should be, it was going well!

Now go and answer MUHR's question!

Scott is just stirring, feeding the Troll its called. he doesn't care.

[mr bucketracer]

Scott is just stirring, feeding the Troll its called. he doesn't care.

no , i like what he made , face it you all did , what the hell went wrong ?he never bought the rygar into this thread , you lot did , so what if it never made what it intended , face it he got it going , runs not to bad , with more work you never know , i thinkl shame on the lot of you the way you lot be carrying on . treat others the way you like to be treated !

[chrisc]

No that piston i from a Malossi

Thought that cylinder in the background was a KTM. Looks a lot like the (slow) engine project 50SX of mine.

[Fabio15]

Scooter friends. I have a 2001 Aprilia Ditech Morini. I'm looking for a big bore cylinder that has ability to go 50mm. 47mm is max off the shelf 70cc kit. I know I'll have to bore cases for bigger than 47mm.

Problem is I'll need a cylinder that a Ditech head will fit. Do you know of any cylinder that I could use?

To my knowledge there has never been a 100% bolt on solution for this. One could assume a non-ditech morini big bore kit of same vintage would be a good start.

I would scrap the morini and fit a minarelli or piaggii carb engine

[SwePatrick]

Does anyone have any tips or experience regarding the design such as wall thickness or the like?

It´s always good to have metal to grind in, that´s my advice =) (experience tells me that one is never happy with the porting)
One thing i would try is some coolingfins on exhaustduct to increase heat dispertion into the surrounding water.

rgds.

[Muhr]

It´s always good to have metal to grind in, that´s my advice =) (experience tells me that one is never happy with the porting)
One thing i would try is some coolingfins on exhaustduct to increase heat dispertion into the surrounding water.

rgds.

I tested to do a little different variants to the exhaust side but was questioning if the risk of film boiling was too big? is that something you have experience with?

[Muhr]

Thought that cylinder in the background was a KTM. Looks a lot like the (slow) engine project 50SX of mine.

You're right, a real sniper! Did not even notice it myself, but it's another project

[lucf]

no , i like what he made , face it you all did , what the hell went wrong ?he never bought the rygar into this thread , you lot did , so what if it never made what it intended , face it he got it going , runs not to bad , with more work you never know , i thinkl shame on the lot of you the way you lot be carrying on . treat others the way you like to be treated !

Thanks mr Bucketracer, and for everyone to know Ryger has not finnished at all, it just has to start !
And I'm glad that there are still people who realy can read and not only bla..bla.. bla.... without reading well !