JAWA 2-stroke power tuning (part 3) - new clutch 

Love to watch your enginering and how all the staff are going to fit together. Great job!

Very awesome! Love you work. You're like the master of Jawa. Its very fun to see a quite simple, low powered vehicle get completely changed by someone that has absolutely mastered a brand/ model. My own project is a Tomos. I've been modifying the clutch too, cuctom cnc segments, Puch maxi cylinder, custom exhaust, custom welded intake, waaay bigger high tech carburetor. Its just fascinating to absolutely get 100% of the maximum performance out of "old obsolete tech". Looking forward to the next video!

I absolutely adore your skills and craftsmanship!

Finally been looking forward to this keep up the good work

Great content, i watched the other videos of your channel, you have gret skills mate and you sure know how to handle a two stroke! Here in Italy we do a lot of stuff like these on old vespas, somebody manged to overtake 30hp on that small thick frame, quite crazy, so we had to solve problems like yours... clutch bell which easily open in two parts, gearbox shift cruises which breaks and so on...today we have a lot of reinforced stuff on the market made by some really skilled guy, but somebody still does it like you, machinig everything from zero into the garage. I've been into two stroke for more than 15 years and i love them. Last month i found, here in Italy, a rare Jawa 250 californian , white fenders and black\chrome tank , from 1970...a quite rare motorcycle, especially here in Italy. The baby has got just 7000km but needs some repair, a new piston and a new connecting rod , i've already found almost every part. I love this bike since the day i took it with me from its recovery on the outside, mine has got the same engine as your, the 590 with the second type of piston , the one with those marks for the porting on its top. I would really enjoy to make a better contact with you, if you have a social or something similar! 🙏 thanks for your contents , greetings from Italy and from a young jawa owner!

Amazing job, all jawa users facing the gear prblm, now this is the end for this issue.

lovely clutch .. simply amazing ...hope it rides great too

Verzeih mir den Ausdruck, aber einfach ein geiler Typ mit richtig Passion für die Sache! Macht einfach richtig gute Laune dir bei dem Projekt zu folgen!

I really like your work aesthetics

i'm looking forward to it.

Kus umění, nádherný sleeper!

mit sinn und verstand sehr schöne arbeit... respekt

wow, amazing work!

Fantastic work... and stay driving it like u stole it... 😉👍👍👍👍👍👍👍👍

Очень интересная доработка, ваше мастерство впечатляет 👍

Danke shöne,super videos,for good mood,thank You,So Much👍

i really like your hardwork sir. very detail 😍😍😍

.. sounds like a Ducati clutch.. YOU ARE A BIG MASTER 😄😄

Awesome...thank you

Great video. As a czech and owner of many JAWA motorcycles, there are 2 major clutches. Your's original is called 634 small clutch for older jawas. Then there is the "big" 634 clutch, which has some plates more and stiffer springs, is also a duplex, but essentialy is the same as the "small". Then there is the 638 clutch, which is way less reliable, but can be fixed with proper adjustments and can transform much more horsepower. Small 634 clutch can transfer up to 15-17hp (theoretically), the "big" can transfer up to 23hp (my personal experience is up to 26hp, but you have to get special springs and cant do stunts and full accelerations in short periods of time) and 638 clutch can transfer up to 35-60hp. All of these clutches can be swapped with no to low changes to engine, except small clutch isn't duplex. My favourite is normal 634 with stiffer springs, i use it on my 638 engine, which has 23-26hp. New is cheap and lasts +- 100k km before replacment. 638 clutch is the best for tuning and 99% of all racers use it. It lasts up to 150k km and when fixed (look it up, solution is pretty easy), it is better in every aspect than 634 clutch, except some minor issues, which make the difference in normal commuting and that's why is 634 clutch more popular. Also, modern 4T motorcycle oil can be used, beacuse plates are made from the same material as any other manufacturer uses today. This also helps transfering more power. All hp values here are with factory oil, which is basic 75w90 (don't know exactly), which gets its job done. Yeah and one note to the clutch hub tolerances. In normal service and commuting, just ignore it. These machines were poorly made and are made to go everywhere. There are examples of 400k km of these engines and clutches still worked. My has 120k km and i changed plates once, 3x springs and 4x primary chain over the years. By normal bike's standards, my clutch is KO, but for jawa, its almost like new. I reccomend looking up 638-640 series, my favourite indestructible jawa motorcycles.

Vorneweg: spitzenmäßige Arbeit! Junge war die "alte" Kupplung ausgefeuert 😱. Hätte nicht gedacht das das Drehmoment da so einen Schaden verursacht. Wieviel hatte denn die vorherige Kupplung gelaufen? Freue mich riesig auf die Auspuffanlage! Mach weiter so 👍!

Как всегда сто лайков тебе !!! Красавчик!!!

POWER :D

Спасибо за видео! Я неделю перед сном задумывал так сделать! А теперь ещё и увидел что это реально! Вопрос: какая марка стали на корзину?

Просто и гениально

I had a 1974 CZ enduro bike, It had a dry clutch but the shaft seal always leaked so it was a wet clutch.

what material did you use for the clutch basket?

Nice work. How was the clutch bearing. Thought you might of replaced it to.

Hi Hi I was thinking about making external clutch basket. My idea was to make external basket diameter 4mm bigger and slots for lamels make by EDM wire cutting machine. It would be very strong, easy to production if you have accest to EDM wire cuttin machine.

Wow

Hi , can you do this clutch for me? What will be the price?

Hey, since you've machined a new clutch, didn't you consider replacing the sleeve bearing with a needle bearing?

Very good... You changed jawa from stock to strong jawa.. so. Are you still working on this project... ??

Will you make a video about the exhaust?

I just pee myself a little. Very nice!

Скільки зубців на зірочці цапфи колінвала?

When will you finish this project???

Kako da bodem u kotak sa ovg majstora

Добрый день, возможно ли заказать у вас такую же корзину?

5:43 is just machining porn! Beautiful craftmanship!

♦️♦️♦️♦️♦️

And the gearbox was the weak point on Jawa 350. I suppose we see next episode on that soon

Отправь мне такую корзинку на мою 559/250💜

Bu motor bloğunun aynısını Türkiye’ye gönder bana

Bore out your jawa cylinders to 60mm and it's a 367cc bike.