ESE's works engine tuner

[Muciek]

Here's one poor casting http://imgur.com/qyl5kKq,SIXw4lD,Sa7shYd,oo6t2xo
The CZ ones were far better , by cheap I meant you can buy them now for 25$ or so. You can always weld them and get plated

[Ocean1]

Generating the 3D models is the part that is ignored by many when talking about creating parts with printers/laser/CNC technology.
This is a huge part of the overall time consumed in any digital driven process ,as you must create a perfect 3D replica on the screen of any part you need to make, no
matter what the end process.

I was going to post this as an example of what's possible inside a computer but extremely difficult to actually manufacture.



But a quick look revealed this: http://www.thisiswhyimbroke.com/klein-glass-bottle



Which I've subsequently ordered.

There certainly wern't any Ipods involved in its creation, though.

[TZ350]

100cc H2o



Well it just might be my lucky day, I was given this 80cc, 50mm big bore Malossie Sport cylinder.



It looks like there would be enough room to really widen the rear B ports and get a close approximation of the Aprilia 125's porting layout.



Weld an 8mm plate on the top, re bore and re plate and you could have a 100cc's



This is an RG50 crank de stroked so I can use a Kawasaki KX65 piston and still be 50cc. There is no reason a RG50 crank couldn't be stroked for 47 or possibly even 50mm.

A 47mm stroke and Yamaha KT100 cart pistons = 49.8cc, so lots of possibilities



We could put a nice big crankcase reed in the back of the RG50 cases.



Or maybe even convert it to rotary valve and/or cut the gearbox off and make it CVT.

The RG50 already has a water pump and a nice 6 speed gear box too.

Its a project worth thinking about if it can make more than 31hp and I get really desperate about reliability with air cooling.

So ... I am not without option.

[Grumph]

[QUOTE=F5 Dave;

tangent 2:
What it didn't make clear was in real life these ally liners would be plated. Where these I wonder? or is there a further dissimilar metal junction loss to be considered?

tangent 3:
And why, why didn't they test an ally liner pressed into an ally casting? That would have shown if, being that iron bores are a problem there is any point of making a replacement ally liner.[/QUOTE]

Herman Meier did slip in alloy liners for the Royal Enfield 250 singles. Slip in at room temp, interference fit as soon as it warmed up. Chrome plated too i believe. Never seen any heat transfer efficiency figures for it though. Great for development work I'd think.

[F5 Dave]

This is an RG50 crank de stroked so I can use a Kawasaki KX65 piston and still be 50cc. There is no reason it cant be stroked for 47 or possibly even 50mm.

A 47mm stroke and Yamaha KT100 cart pistons = 49.8cc, so lots of possibilities

erm, stock RG is 37.9mm stroke. Are you suggesting you can stroke it over 5mm pin direction? I think you'd find you'd have a problem with the rod BE passing through the case bottom. Also that liner looks pretty thin to be wanting to take any more out of it.


But yes it does make you ponder. heck I've even layered RG cases & wondered about making a Vtwin 100.

Pity no one made a 50mm bore/stroke modern engine.

[husaberg]

Anyone know anything about these i just came across it.

[TZ350]

erm, stock RG is 37.9mm stroke. Are you suggesting you can stroke it over 5mm pin direction?

But yes it does make you ponder. heck I've even layered RG cases & wondered about making a Vtwin 100.

I have had a good look, and using an Aprilia 50 long rod or RD200 twin rod I am confident of 46, skim the cases 1mm and 48, 2mm if you dare and get 50mm stroke. I skim the GP125 cases 1.5mm for clearance on the RZ350/RD400 rods.



We have some GT125 engines and have looked at 100cc twins or 100cc twin and CVT setups. There is so many interesting project possibilities and so little time.

[Bert]

Anyone know anything about these i just came across it.

[/IMG]

Yip

Same as the Yamaha TZR125. Designed primarily in Italy, a subsidiary company Moto minarelli..
That one is the same as the earlier TZR (2RH From memory), though looking harder there's not much difference.
The gilleria 125 is the same as my later model 4dl...
50.6 stroke 56 bore.
Same bottom end as the WR200 & DT125r & KTM125LC2.... Long list of goodness....

[husaberg]

Yip

Same as the Yamaha TZR125. Designed primarily in Italy.
That one is the same as the earlier TZR (2RH From memory). The gilleria 125 is the same as my 4dl...

Bummer i thought it was a newerish one i had missed. Has a 50mm stroke though. You sent me the stud pattern for these didn't you Brent?

[Bert]

Bummer i thought it was a newerish one i had missed. Has a 50mm stroke though. You sent me the stud pattern for these didn't you Brent?

About 5 times... Do you want me to send it again?

[husaberg]

About 5 times... Do you want me to send it again?

Gee i thought Dave was the xmas Grinch oh you did as you were............

[F5 Dave]

Yip

Same as the Yamaha TZR125. Designed primarily in Italy, a subsidiary company Moto minarelli..
That one is the same as the earlier TZR (2RH From memory), though looking harder there's not much difference.
The gilleria 125 is the same as my later model 4dl...
50.6 stroke 56 bore.
Same bottom end as the WR200 & DT125r & KTM125LC2.... Long list of goodness....

Someone should make an engine using one of those. reckon it would be killer!

Now all we need is nice 51mm pistons, but heck the CR85 overbore pistons would still give you 100cc.

So when you make a new sleeve, I wonder if it should be ally & a different rod for 15 or 14mm small end. Nige did tell me what pistons he was running but it escapes me now, some queer kart stuff.

[husaberg]

Someone should make an engine using one of those. reckon it would be killer!

Now all we need is nice 51mm pistons, but heck the CR85 overbore pistons would still give you 100cc.

So when you make a new sleeve, I wonder if it should be ally & a different rod for 15 or 14mm small end. Nige did tell me what pistons he was running but it escapes me now, some queer kart stuff.

on a link Frits posted a while back i seen these as i don't speak sausage i never got around to chasing it up but i guess they will be in 12 mm gudgeon or be dykes rings with my luck.

http://langtuning.de/Shop2/index.php?a=2033
http://langtuning.de/Shop2/index.php?a=1116

[jasonu]

Someone should make an engine using one of those. reckon it would be killer!

Now all we need is nice 51mm pistons, but heck the CR85 overbore pistons would still give you 100cc.

So when you make a new sleeve, I wonder if it should be ally & a different rod for 15 or 14mm small end. Nige did tell me what pistons he was running but it escapes me now, some queer kart stuff.

We considered the TZR125 motor (and actually had one) a few years ago but decided against it. I don't remember exactly why we steered away from it but I do remember it was bloody heavy and physically very big.

[Bert]

We considered the TZR125 motor (and actually had one) a few years ago but decided against it. I don't remember exactly why we steered away from it but I do remember it was bloody heavy and physically very big.

Actually far heavier than I actually expected. The head was difficult to resolve.
Yz100 pistons worked a treat (16mm pin).

I never quite got the power out of it that we hoped for, but I never made a pipe (opt'ing for a old RS125 pipe; so there was likely a lot more power that could have been had). Here's a reminder of the hole....

http://www.kiwibiker.co.nz/forums/at...5&d=1360092921