The Bucket Foundry

[ken seeber]

Neil, goodonya !!!! A fantastic effort. Lots of hard work, commitment, passion, distractions and it goes.

I've never seen an engine run so smoothly at 30k

[Frits Overmars]

Sleeve engine running. I guess this would have to be the first open ended sleeve twostoke running since Riccardo?

[Flettner]

Yes it is good to have the sleeve engine running but it's almost worthless without putting real load on. At least it passed the first test and actualy ran without seizing up straight away. I NEED another YZ250 gearbox.
The 3D inlet manifold didn't happen, I just made one in the workshop, but I'll keep trying as the one I made is not quite right anyway but it did it's job. Results like this are dangerous as it just encourages me
Where did I put that FOS cylinder?

[Flettner]

I've never seen an engine run so smoothly at 30k

I don't think that will happen any time soon, I just wanted to hear it go and it did. Lets see Harry Rygerise this then

[WilDun]

I don't think that will happen any time soon, I just wanted to hear it go and it did. Lets see Harry Rygerise this then

Fantastic, (even though I've just switched on and haven't watched the video yet) but to have something like this running without seizing must be a great feeling - it's definitely a unique machine and all your own work too! - deserves all those hand claps you've been getting.
So here's a couple more!



Update,
Just watched it and perhaps significantly, there was no smoke! - (unusual for most first startups) a very good result, well done!

But you must admit that it was inspired by "Harry" ........... (Harry Ricardo).

[Flettner]

But you must admit that it was inspired by "Harry" ........... (Harry Ricardo).

Yes, absolutely, I would not even started the project without reading about his work. It just seemed a pity to see all his sleeve development just stop.

[seymour14]

Well done, a worthy tribute!

[breezy]

Sleeve engine running. I guess this would have to be the first open ended sleeve twostoke running since Riccardo? Maybe.
Now to fit exhausts and gearbox to make it usable, to put REAL thermal load on it.

https://youtu.be/bwsu5td6nko

https://youtu.be/9tHnBHh3VnM

Fantastic achievement...

[Lightbulb]

Well, I had the privilege to see and hear the engine in person. This is the longest and the most revs it has done to date. I am super impressed.
Here is the video my son took.

https://www.youtube.com/watch?v=P9Mu...ature=youtu.be

My artistic picture, looking through the exhaust at BDC approx.
Thanks Neil

[husaberg]

(on the video)now who said it was quiet?

That was me, sounds great though

[Flettner]

That was me, sounds great though

It's got a bit of a crackle to it with a few revs. I very much want to ride this thing around now

[WilDun]

Well, I had the privilege to see and hear the engine in person. This is the longest and the most revs it has done to date.
My artistic picture, looking through the exhaust at BDC approx.
Thanks Neil

Fantastic stuff (well I shouldn't say fantastic, cos it's real).
If (the other) Neil can't get a suitable box then he'll have to hitch it up to a generator or something in order to wring it's neck! - of course I realize that small steps are probably necessary in the case of this project. - Great achievement so far!

[husaberg]

It's got a bit of a crackle to it with a few revs. I very much want to ride this thing around now

What revs are the pipes going to be tuned to Neil?
Have you seen the Hydroformed thread?

http://www.kiwibiker.co.nz/forums/sh...-exhaust-pipes

I will have a google look on the net for a box and see if the 450 box is similar enough to work with the parts fiche
Alas that's my only talent.

[Flettner]

What revs are the pipes going to be tuned to Neil?
Have you seen the Hydroformed thread?

http://www.kiwibiker.co.nz/forums/sh...-exhaust-pipes

I will have a google look on the net for a box and see if the 450 box is similar enough to work with the parts fiche
Alas that's my only talent.

250 twostroke!

[husaberg]

250 twostroke!

Yeah I know, but Yamaha is likely lazy and unlikely to design two different gearbox's for the two strokes vs the fours. Honda didn't.

looks like its doable. For a man of your many talents.
They made and sold a lot of 450's and I doubt they run long enough to wear the trannies.
here are all the dimensions.
According to the tooth counts in the Yamaha parts diagrams, The 2006-2009 YZ450F share all gear ratios with the 2003-2012 YZ250.

Tooth counts for both 2T and 4T YZs are:
1st) 14:27
2nd) 15:23
3rd) 18:23
4th) 22:24
5th) 21:20

http://www.thumpertalk.com/topic/927...-close-ratios/

of course its easier to go with the YZ as that's what you are set up for but its just an idea the clutch hub is diferent and it looks like the YZ450 has a few wider gears and modified dogs.

I started trolling Ebay today for a Bottom end of a YZ250 but got distracted by work but I couldn't find a cheap one, what do you need other than the cluster and shift drum and forks Neil?