ESE's works engine tuner

[Frits Overmars]

Is there an easy way to translate a whole .docx, maybe someone can post the 2026 Tunerbattle on here

Here is the Tunerbattle 2026 rulebook Wob.
https://www.simsonforum.net/thread/8...026-regelwerk/

If you search for Langtuning Tunerbattle 2026 or Langtuning Wintertreffen 2026 you will find more info and videos.

I use DeepL (https://www.deepl.com/nl/translator) for translations and I understand they also offer an option to translate complete .docx files but that may be a paid option; I'm not sure.

By the way: you do know that Youtube offers realtime translation, don't you?


As for the exhaust pipe on the Tunerbattle-winning bike: yes, it is fat. Now why is everybody looking at me? I was only there for the free bratwurst.
Anyway, to quote Crocodile Dundee: That's not a pipe. This is a pipe.

[wobbly]

Here is the resident BRC Towel Head with his new RPG I did for the 500cc mini sprint dirt trackers.
I will let you know if the NSA is watching this.

[ken seeber]

Just saw this. It'd be interesting to test the depth:


https://hotmart.com/en/marketplace/p...ke/X102278817J

[diesel pig]

Just saw this. It'd be interesting to test the depth:


https://hotmart.com/en/marketplace/p...ke/X102278817J

It would depend on the translation from portuguese to english, I would think. Depending on that , it could be interesting.

[Peter1962]

It would depend on the translation from portuguese to english, I would think. Depending on that , it could be interesting.

The Yamaha DT 180 is a 45 year old engine, air cooled, cylinder reed intake low performance soft enduro engine made back then for the Brazilian market. Why choosing such a poor starting point when you want to write a book anno 2026 on high performance tuning on two strokes ?

Would it not make more sense to start with a modern MX 125 engine like the yamaha yz125, or the KTM 125 SX or the KTM 250-300 SX, which have a real life market share, are being produced by the tens of thousands per year and are not boutique projects ? And which are on the technological level that manufacturers produce in 2026 and not that of 1981 ? Or with the snow sled engines, where two stroke still has a dominating market position and there is still development ?

https://sledmagazine.com/two-stroke-...6-snowmobiles/

Why not start from the best performing and most modern normaly aspirated sled engine, the Polaris 9R, designed in 2022 ? Or the most modern MX engine, the ktm 250-300 TBI SX-XC in its latest itteration that dates from one year ago ? Those are real market comparissons, the yam dt180 is a relic.

[JanBros]

you could go even further : why not start with an Aprilia RSA125 ?
it doesn't matter what your starting point is, what matters is that what he is saying works. what matters is using cheap-ass engines available to everyone and one can do the same and check that the writers results are correct. when proven right, aply the same theories to whatever you want.

[diesel pig]

The Yamaha DT 180 is a 45 year old engine, air cooled, cylinder reed intake low performance soft enduro engine made back then for the Brazilian market. Why choosing such a poor starting point when you want to write a book anno 2026 on high performance tuning on two strokes ?

Would it not make more sense to start with a modern MX 125 engine like the yamaha yz125, or the KTM 125 SX or the KTM 250-300 SX, which have a real life market share, are being produced by the tens of thousands per year and are not boutique projects ? And which are on the technological level that manufacturers produce in 2026 and not that of 1981 ? Or with the snow sled engines, where two stroke still has a dominating market position and there is still development ?

https://sledmagazine.com/two-stroke-...6-snowmobiles/

Why not start from the best performing and most modern normaly aspirated sled engine, the Polaris 9R, designed in 2022 ? Or the most modern MX engine, the ktm 250-300 TBI SX-XC in its latest itteration that dates from one year ago ? Those are real market comparissons, the yam dt180 is a relic.

Well you maybe right, It would take someone getting it and having a look at it. It could be like Bell's book, none of the the current tuners say it is wrong just old. With old ways of doing things.

[ApolloMotoMoto]

Just saw this. It'd be interesting to test the depth:


https://hotmart.com/en/marketplace/p...ke/X102278817J

There was a bit of a row on one of the facebook groups about the content of this book a few months back...

Apparently a large amount of Frits Overmars work is included without attribution or explicit permission; the entire FOS Leaning Tower of Pisa Scavenging Theory, for example; with the FOS images copy-pasted directly into the books chapters.

I have not heard Frits actual opinion on the matter, but quite a few commentors seemed to think it was less than ethical.

I actually dont know what the "story" is, so I am not making any direct claims, just sharing what I heard "on the internet"

[Frits Overmars]

I once read that plagiarism is the ultimate form of flattery, but I'm not too happy about my views being contaminated with other opinions without it being clear that those are not mine.

[SwePatrick]

Hello guys!

I´ve been in a little bit of hiatus from this forum.
But work has still been done

I´m working as we speak on two different projects, and has finallized a another one, Zundapp 20whp+ 66cc, went very good, like a lot of plus , reached physical limits, 24whp at ~13300rpm
But it took me one crankshaft and three pistons, and hundreds of dynopulls, hours and hours testing, videos are available at my youtube channel.

Today though my TZR250 get´s the most attention, in posted video below i´m talking about that dimpling that has been taken too far on the web
Also i have taken the challenge to try to cast a new intake for my old vintage KTM 125cc RV engine, small glimpses of that, me trying to shape a wooden plug.
So, no 3d printing, i´ll do it the old way, wooden plug and sand cast.

Yesterdays video and some playlists below:
Small things takes forever to get done!



Zundapp project:
https://www.youtube.com/watch?v=GakC...Q7CWvUDKS-hkIB

Yamaha project:
https://www.youtube.com/watch?v=56ny...ZlzqZzinLcBSzz

[Peter1962]

you could go even further : why not start with an Aprilia RSA125 ?
it doesn't matter what your starting point is, what matters is that what he is saying works. what matters is using cheap-ass engines available to everyone and one can do the same and check that the writers results are correct. when proven right, aply the same theories to whatever you want.

The KTM 250-300 range (latest evolution was 2025) and also the 125 (latest evolution whas 2023), and the yamaha yz 125 (latest evolution was 2023) and its much older brothter the yz 250 (basicaly still the same engine as the 1999 version...) are the bulk of the actual two stroke market anno 2026. Plus the boutique brands like TM, Sherco and Beta, primarily in the enduro market, not so in the MX market. They are produced in big numbers, don't you think thats a more realistic and relevant starting point then an obsolete soft-enduro bike from decades past ?

There is no problem with nostalgia. I like nostalgia myself.

But when it comes to evolution, I think it's more interesting to see the posibilities in reference to 2026 technique than to 1985 technique.

[Peter1962]

Here is the resident BRC Towel Head with his new RPG I did for the 500cc mini sprint dirt trackers.
I will let you know if the NSA is watching this.

Better than a Javelin !

Ideal to blow the competition away.