- Видео 17
- Просмотров 1 539 807
Siegfried von Stern
Добавлен 28 авг 2017
Flight school for vintage 2- and 4-stroke bikes as well as ‘special‘ engineering & craftsmanship
Contact: quietlightengineering@gmail.com
Contact: quietlightengineering@gmail.com
2-stroke performance engine - special JAWA piston repair
Good day again.
This video, effectively is a result of a slightly too specialised engine part that is not available in any stock. I had the choice between a lead time of 2 or 3 months for a new, expensive customised piston or a repair and machining trial, which ended up as special as the entire engine.
For those who want to do a similar repair: The bushing press fit was 0,03 mm (oversize) which should be sufficient to keep it position. As it is not a part under static load I’d never ‘glue’ it in position, like some do.
Thanks for spending some time on this channel, as well as for you positive comments.
Music in this video created by following artists:
Pavlo Butorin ‘Funtime’
Ricky Bombino ‘Cyb...
This video, effectively is a result of a slightly too specialised engine part that is not available in any stock. I had the choice between a lead time of 2 or 3 months for a new, expensive customised piston or a repair and machining trial, which ended up as special as the entire engine.
For those who want to do a similar repair: The bushing press fit was 0,03 mm (oversize) which should be sufficient to keep it position. As it is not a part under static load I’d never ‘glue’ it in position, like some do.
Thanks for spending some time on this channel, as well as for you positive comments.
Music in this video created by following artists:
Pavlo Butorin ‘Funtime’
Ricky Bombino ‘Cyb...
Просмотров: 72 419
Видео
JAWA 2-stroke power tuning (part 6) - how to make motorcycle gears
Просмотров 13 тыс.6 месяцев назад
Yes, it has been a while. It simply took me 1.5 years of (re-)search, development und finally production of just a hand full of gears - some might say. But you better check everything twice if your own life depends on what you make. This is the story of finally getting rid of one bigger blind spot on my JAWA 350 power experiment. The old gearbox that just stayed alive under the enormus load of ...
JAWA 2-stroke power tuning (part 5) - exhaust pipes
Просмотров 173 тыс.Год назад
Hi folks, 2-stroke & JAWA lovers, welcome to another little garage insight. It’s about the pipes this time. A PAIR of exhaust pipes of course - as usual on a historic twin-port Jawa. Quite a bit work to make them fit the bike. Technically it’s a bit of a compromise as the length - in case of straight pipes - is limited for obvious reasons. Special thanks to Sir N. Stiller m. laserns...
Rescuing a vintage bike fuel tank - dent removal
Просмотров 2,6 тыс.Год назад
I recently got hold of an old #JAWA fuel tank which - from distance - appeared to be in perfect condition. At least for the 60 years it has on the clock. This short video is about how I fixed the little problem with the large dented area around the filling hole.
JAWA 350 / 559R kickstarter repair
Просмотров 19 тыс.2 года назад
What to do if rare vintage #2-stroke JAWA Libenak parts are totally worn out? In this case I was lucky, as the biggest contributor was the bore of the main body which could be fix by means of a repair sleeve…
JAWA 250 350 2-stroke tuning (part 4) - decompression valve
Просмотров 26 тыс.2 года назад
Hi folks, welcome to a short clip on a cylinder head modification which was required to allow easy starting of my 350 cc single. Initally, I didn‘t expected it to be mandatory, but there was no reliable way to bring her to life without such a valve. As an alternative EX-timing could have been increased or compression reduced. But that does change engine characteristics quite a bit… Here is the ...
JAWA 2-stroke power tuning (part 3) - new clutch
Просмотров 31 тыс.2 года назад
Welcome to this little insight of how the clutch system of my 350 cc power vintage JAWA has been improved. With nothing / no solution from another bike on the market I was forced again to help myself by re-designing some major components to make it robust enough to cope with more than 30 #twostroke HP without any visual changes to the clutch side engine cover. Yes, that’s the point. Certainly t...
JAWA 250 gearbox cutaway - How a manual transmission works
Просмотров 12 тыс.2 года назад
Welcome to a short gearbox insight, or how to give a broken 2-stroke engine casing a second life. The video can give you a pretty good idea of how this particular 4-speed transmission (similar to many others) works in case you are not familiar with it. It also shows the unique mechanism which JAWA engineers developed to combine kickstarter and gear lever. Same hardware is installed in older #Id...
Kawasaki Estrella エストレヤ RSx360 (1996) Cafe Racer vs. home made engine parts
Просмотров 14 тыс.2 года назад
In 2015 I had chosen to make the Kawasaki Estrella - also known as BJ250, or little W650 - a bit faster and slightly more sporty. A little bit of wind from the front and it would hardly reach 100 kmph in original condition. What a pitty for bike I really like for its beautifully clean engine an its overall simplicity. But when I started the project quite quickly I had to realise that there are ...
JAWA 2-stroke power tuning (part 2) cylinder, piston, clutch improvements
Просмотров 59 тыс.3 года назад
Another little insight behind the scenes of my vintage #twostroke steam machine brewery. In particular as some people asked me how the cylinder was made in more detail and where the piston came from. And why for god’s sake does the clutch survive the increased power?? Old Yamaha RD, MZ ETZ250 and Honda CR500 parts were used to get inspiration from and to reverse-engineer… But some things were s...
JAWA 250 goes 350 cc and takes off...
Просмотров 119 тыс.3 года назад
...or at least tries to take-off again. Well, with original exhausts it just doesn't seem enough steam to really lift off into the sky, but anyway it's great fun to ride this old #twostroke machine also on normal streets. You don't believe? Feel free to have a look into the other videos e.g. the engine making-of: ruclips.net/video/H3s_CemOJ9c/видео.html Thanks for watching as well as your posit...
JAWA 559R | 350 cc 2-stroke single - acceleration test
Просмотров 47 тыс.3 года назад
...this is a cockpit view during a little country road ride with a quite special JAWA 559. It used to be a 250 cc which was converted to a 350 cc single incl. reed valve and large carb. Quite similar to what was offered on the US-market as Model Type 573 (no reed valve at the time of course). The top speed of the 559 R is almost 150 kmph now and its #twostroke torque is phenomenal when comparin...
JAWA 2-stroke power tuning 350 cc / 559R (part 1)
Просмотров 641 тыс.3 года назад
JAWA 2-stroke power tuning 350 cc / 559R (part 1)
JAWA 350 Ultrasport / 559 R- testing advanced Libenak power...
Просмотров 300 тыс.3 года назад
JAWA 350 Ultrasport / 559 R- testing advanced Libenak power...
Hello, I have the same model JAWA as you and the engine you made impressed me with its performance and sound. Do you sell the engine you made and how much do you want for the engine?
You can drop me another e-mail to quietlightengineering@gmail.com for more background. Regards S.v.S.
Kto mi zrobi skrzynię do Pannonii?
No, unfortunately not possible.
Phantastische Arbeit, Gratulation!
👋🏻🙋👍🏻
When is new vedio coming ?
That will take a while mate. There is NO big company behind all this.
👍👍
Merci de France ! 🙂
Vous êtes les bienvenus.
Très beau travaille de précision bravo et très belle machine avec ce beau son de moteur 2 temps
Merci 🙂👋🏻
Hey i love your work is there a posibility that you would tune my engine? I will pay ofcourse😂
Petr, please contact me via quietlightengineering@gmail.com Regards S.v.S
this is super genius! nice works dude 👍🏻
😀👌🏻👍🏻
The wall thickness of the bushing seems very thin, I would choice a bigger diameter piston pin, but with a larger crank rod eye, who nows.....
Right, but try and get a good oversize wrist pin, or make one. Also not an easy task. It works fine as is quite a while already.
Amazing work, I think I would have resorted to adapting the cases to take a complete gearbox from something else!
Thanks, but that would be hard to combine with the obsession of stock bike look.
TOP! guter Mann. Sehr schönes Video! VG Achtzehner Zweitakt Tuning
Good old Achtzehner Tuning from LPZ still alive. Keep on racing!
I want to contact you
i wish i had the tools and skills lol. the rubbing mark could be hose rubbing on it?
Do you think so? I think the „rubbing marks“ are due to incorrect profiling during the machining step which gives the piston its curve. The setting of the machine used for it most likely was not right.
Once again someone with thousands of dollars in machinery bragging about how they solved a problem at great expense!
Yepp. All the machinery was bought just for this single video 😉🫡 If I knew how, I‘d fix such problems with a screwdriver and rusty pliers. May in the next video.
Gotta love me a bit of German engineering 🙂
🤟🏼👋🏻😬
Nice to have the tools for such a precise repair!!
The internal measuring instrument I actually bought for this specific task. An old german (GDR) precision device of highest quality.
You and Allen millyard would get on great
Maybe 🙂
Well done mate. Good job 👍
Thanks Mate. 👋🏻🙂
Boas companheiro, grandes curvas com a nova máquina! Parabéns pela conquista.
Thanks companheiro 👋🏻⭐️⭐️⭐️🤟🏼.
Чтоб я так жил))
Really nice bike. I love the old two strokes❤️
🤟🏼👍🏻😍
hello, great job again did you consider to use variable ignition? I mean when moment of ignition depends on r/min I have no idea how much it improves 2 stroke engine performance, but for 4 stroke engine it is esential.
Yes, considered. It won‘t help much and also there are hardly any systems on the market which are made the way I‘d like it to be.
@@Quiet.Light.Engineering I have tried: IMF soft - ignition I have done only one short test with JAWA 350 You cen see old video on my chanell there was no improvement, but engine was original with small revs range. And ofcourse, more effort would be necessary to understand all context,........ With 4 stroke engine there was big progress Perhaps this is reason why old 4 stroke motorcycles as PRAGA BD 500 have extra lever on handlebar to adjust ignition manualy during engine run my ignition is free now if you wold like to test it I can land it to you.
Great work! Which bronze did you use? Oillite?
This is what I used: CuSn7Zn4Pb7
I love your metal bush sleeves question are those brass sleeves or copper sleeves amazing work on that piston😢😅😊😂😂😊❤
Special bearing bronze 👋🏻😃
lovely job!!!!
Thanks 💪🏼👋🏻
Extra
Superb, I loved that... many thanks
Likewise Richard. Many thanks.
A very good work.
🤟🏼👊🏼👍🏻
A true labour of love. Outstanding engineering and design, she really is a true one of a kind.
Thank you, Sir.
The ingenuity and craftsmanship is outstanding. Also added bonus of hedgehog and cat's at the shop.
Waiting for more videos on jawa
Excelente
Increíble 🫢💪💪💪
Thanks. 💪🏼🤟🏼👊🏼
Is that a modified cylinder with bolt on reed block or a later development from factory? I don't think I've ever worked on a JAWA, CZ or MZ that didn't have rumbling main bearings. We used to change mains on MZ at first service (1970's~80's, ~500 miles) Personally, I would have bored/reamed piston and fitted 'top hat' thin wall bronze bushings almost exactly like you did. (I did train as precision machinist before returning to motorcycle dealer servicing) That's very nice micron reading small bore gauge.
Hi, it‘s a heavily modified stock cylinder. See other video „how it was made“ if interested.
Krásna práca 👍nádherna motorka 👌. Tiež mam Jawu 559 a jazdim na nej každy deň . Vidím že si odborník a baví ťa to. Može vedieť odkial si? Len zo zvedavosti. Ďakujem🙏 . Ja som so 🇸🇰 Slovakia🇸🇰
Best Regards to Slovakia! Keep your 559 running!
I love this kind of work! 👍💯
Same for me, too.
New follower, nice machine work. I'm a machinist too and only a hobby moped tuner. I have a Tomos engined moped so I feel you when you need to make parts for yourself! :D
Thanks Mate.
👍👍👍👍
👋🏻👊🏼Thanks.
Sounds nice, a lot of work for something that might work or might not. there is so many variables in to making a 2-stroke exhaust pipe that its almost always hit or miss :D
That’s right. This one produces good top end power but the low end is way weaker than expected. So it’s more for a drag race, but not normal driving.
I am from jawa😂
👌🏻
Lauft wie Motorsäge👍
Bravo !Bonne travaille 👍
Gazie mille.
974 L / 50km
Between 6-7L / 100 km.
@@Quiet.Light.Engineering how bro gahahaha. I like your job!
Very nice work! Thank you for documenting the process and showing us your critters!
Welcome, Sir.
You just get a new subscriber nice job men
Thanks Mate 👊🏼🤝
Уважаемый мастер, похоже Вы до 100 лет будете увлечённым своей страстью к качеству исполнения и к полёту мысли!🎉❤😊😊😊
🙂👍🏻
I should be asleep now, it's 2.30 am, your craftsmanship is beautiful so im going to keep watching. Thank you. 😊
Awesome fix!
Thanks 👊🏼