After 3 decades finally an animation of two stroke's powervalve
@garyt1233 жыл бұрын
4 decades.
@cxbra3 жыл бұрын
Hahahaha
@damienlombardi57753 жыл бұрын
When I saw the small picture to the video I was thniking wouhaaaa a new 2 stroke engine, new injection system with a new concept of exhaust valvle maybe......... NOPE :)
@fidelcatsro69483 жыл бұрын
10 decades if you count 2 strokes in general!
@garyt1233 жыл бұрын
@@fidelcatsro6948 Video is about YPVS technology. Later transfered to 4 strokes as the EXUP power valve.
@longlivekawasaki3 жыл бұрын
Even though this is how Japanese 2 strokes engines have been working since the 80s, it is magnificent to see that there's still one Japanese manufacturer that promotes and makes 2 stroke engines. Seeing as the other 3 has stopped manufacturing many of the older parts this year (2021), it's time to move over to Yamaha! Yamaha prevails gents!
@Kadabra863 жыл бұрын
ktm and Italian Beta make 2stroke advanced technology inyection for 2t
@longlivekawasaki3 жыл бұрын
@@Kadabra86 yes friend, KTM with its sub companies Husqvarna & GasGas. Sherco, the French brand and then Beta like you mentioned. But when it comes to the Big Japanese Four, it's only Yamaha that still makes brand new :'(
@davedemo82293 жыл бұрын
I have an 84 rz350 with this tech. way ahead of its time
@MrFROGY13133 жыл бұрын
You all forget the best.... Tm bikes are faaaar way better than bêta or ktm's. They have the same passion for 2 stroke singe 1970 now. You def should learn how they are made and what they can do. Leader in the karting and that's not an hasard
@bradymxr46593 жыл бұрын
@@longlivekawasaki what’s amazing is that Yamaha haven’t changed their 125 and yz250 2stroke for over 15 years and still kept up with KTM that has been updating their 2strokes for all those 15 years. Says a lot about Yamahas motors! Plus they last longer than the other 2strokes as well. I’ve seen so many postings of ppl with KTM’s having all sorts of motor problems. Plus ppl I’ve talked to at the track. I want to get a new Yamaha 2 smoke after seeing a couple this weekend. They sounded absolutely amazing and seem to have plenty of power considering the one guy was not small at all.
@DoctorMotorcycle3 жыл бұрын
Yamaha has won over so many people just for the sheer fact that they still produce 2 smokers and Sport Quads. Long Live Yamaha!
@VikingNorway-pb5tm8293 жыл бұрын
Yes, i have two ;)
@korbangabut57673 жыл бұрын
Sadly I can't Get a Sport Bike With 2 Stroke
@rwd3233 жыл бұрын
Love that Yamaha still make their 2 strokes!
@nellawell49763 жыл бұрын
What don't they make.
@rwd3233 жыл бұрын
@@nellawell4976 The R6 anymore 😟
@Heavywall703 жыл бұрын
@@Josh-cw8by which is absurd because Kawa is making a 250cc in-line four. The r-6 and the Suzuki gsxr6 were the go to bikes in WERA because they could be raced on so many classes. The only bike more useful as an amateur racer is an SV650
@ninjadragonblade3 жыл бұрын
Wish honda kept the CR 250's going at least :(
@fidelcatsro69483 жыл бұрын
they still do??
@robertjackson75903 жыл бұрын
Interesting this animation shows the reversionary pulse, most don't.
@masterpain77423 жыл бұрын
What is that
@zacrozema30103 жыл бұрын
@@masterpain7742 reverse flow of the exhaust gasses at bottom dead centre, the 2 stoke pipe is shaped is such a way that the exhaust gasses will pulse and reverse flow back into the cylinder so that less air fuel mixture is wasted out of the exhaust, therefore making more power.
@yannhayon27963 жыл бұрын
its called resonance effect.
@RikkyTang3 жыл бұрын
I still remember the sound of the YPVS testing itself when I turned on the ignition of my RD350Fll 25 years later 💓
@1980VINZ3 жыл бұрын
Yesssssss👍
@oepolo63173 жыл бұрын
Yessss #2 👍👍
@fidelcatsro69483 жыл бұрын
rang tang tang rang rang tang tang rang rang tang tang rang
@oepolo63173 жыл бұрын
@@fidelcatsro6948 Yesss!! #3 👍👍👍
@peejayarr23233 жыл бұрын
Amazing bike... fast and light
@thinkandrepent31752 жыл бұрын
The YPVS system is genius. I'm kind of slow with mech tech and studied a shop manual for a YZ250 power valve system for 2 hours once then closed my eyes and pictured it in my head with the forces from the gyro flowing to the linkage to open up the valve. I love simple mechanical solutions problems they are much more beautiful.
An old, simple but so effective idea from YAMAHA that managed to change the 2-stroke world forever. The way YPVS enriches the power curve puts many 4 strokes into shame. Back in the day I could open the throttle of my DT200R without much care on what revs and gear I was in and the bike was accelerating without complains. Dead easy to work on those bikes too.
@Jaredpostzstuff2 жыл бұрын
I’ve still got one sir! An impressive bike for sure
@OrestisTrips2 жыл бұрын
@@Jaredpostzstuff Wish I still had mine, it was my first bike. Yamaha released game changers back in the day (XTZ 750, TDR 250, DT200R) and this was the one with the least issues.
@glowiever2 жыл бұрын
sadly two strokes are no longer street legal in my country :(
@SARUNAMI3 жыл бұрын
次世代型 環境対応2サイクルエンジンが出るとしてもYPVSは必須の技術
@FAU7402 жыл бұрын
Для двух тактных двигателей оптимален непосредственный впрыск, тогда топливо не будет бесполезно сгорать в выхлопной трубе
@GaijinInvader Жыл бұрын
@@FAU740 I think next generation of 2-stroke motorbike engines could use the YPVS technology together with direct-injection as you said
Yamaha is the king of two strokes and always will be, the best period.
@actionsportster76863 жыл бұрын
Yes, Yamaha still makes some 2T engines, but to be honest, they haven't put a lot of R&D into their 2T motors in a very long time. Yamaha's emphasis these days is clearly on 4T technology. I would respectfully disagree with you that Yamaha's 2T motors are industry leading. There are other manufacturers that continuously strive to improve the performance of their 2T engines, and I would argue that some of these companies produce superior 2T motors (KTM and BRP are just two examples).
@joez67983 жыл бұрын
Yea that true to an extent, the money you save on the yammy though you can drop in aftermarket parts and it’ll be just as competitive as any of those Austrian bikes for about the same price. Pick your poison I ride with two guys who have 350sxf and they got more top end but my yz 250 is a lil quicker, I do have boysen reeds and a turbine power core 2 pipe though as well. I do agree though, I’m a die hard Yamaha fan but they’ve been out classed more recently when talking about factory models. Still more reliable in my opinion, cheaper and easier to find parts too. Everyone should just get whatever speaks out to them. There all competitive for the most part.
@krisanderson9972 жыл бұрын
This is demonstrating the fuel loss inherent to all 2 stoke engines. When the piston is down forcing fuel into the combustion chamber, fuel escapes trough the exhaust port. Meaning smokey dirty emissions. This system yamaha has come up with is to use exhaust gas to push the fuel back into the cylinder before the piston closes off the exhaust port. And as everyone knows more fuel equals more power. This is a new approach to that problem.
If you guys could remake the banshee you'd make a killing in today's market.
@BIGSMOKE-bl2lq3 жыл бұрын
Id jump on that
@madeindade.32423 жыл бұрын
oh man!!
@Jellyrollrider3 жыл бұрын
Would never pass regulations.
@madeindade.32423 жыл бұрын
@@Jellyrollrider regulations suck.regulations are 4 4stroke girlie men.
@cardycantplaygolf98613 жыл бұрын
@@madeindade.3242 Haha...says the manly girl who just got its KZbin licence...
@やんいっちゃん3 жыл бұрын
当時RZ350からRZR250に乗り換えた時、低回転から発進出来るのが驚きでした。
@Miksumr3 жыл бұрын
I had 2 Yamaha 125cc DT's. The first one was from the early 90's and the second was brand new in 2001. If I remember correctly, they were identical, only some minor changes in the YPVS wiring and some small stuff. :D The second one was stock and I didnt know how to bypass the YPVS, which was used to restrict the power. After I sold the DT, I found out that they had the YPVS wires crossed so it worked backwards.
I have a 1985 CR80R with the ATAC valve. It's useless. They ditched it in 1986. It was short lived, only available in the 1984 and 1985 models.
@madeindade.32423 жыл бұрын
i guess i agree!!🤷🏿♂️..team yamaha...!!
@anwars98143 жыл бұрын
Good job Yamaha 👍
@gsilva2202 жыл бұрын
Despite their higher power to weight ratio, 2 stroke engines are the opposite of an atkinson cycle engine, throwing away a lot of energy still in the gases before the exhaust port opens.
@ayyylmao43946 ай бұрын
I'm more impressed by the fact that Yamaha cared to do an animation about two-stroke technology after all these years. I wonder if whoever did it had to model that engine from scratch or had to install a CAD package from the 90s lol
@hide72hide7z663 жыл бұрын
この動画出したからには、部品供給の安定化を期待します。
@novavolks96522 жыл бұрын
Cómo se llama la música del vídeo?
@Astrix_Jaeger3 жыл бұрын
Yes, 2 stroke is back!
@longlivekawasaki3 жыл бұрын
They have never stopped making 2 strokes and they're the only manufacturer of the Japanese Big Four that still produce 2 strokes, aside from the kids 2 strokes which most brands still make.
@1980VINZ3 жыл бұрын
Nope 2 strokes isn't back, it never left... And this YPVS system is same age than me........41 years old. You should be very young I bet... 😉
@Astrix_Jaeger3 жыл бұрын
@@1980VINZ yeah maybe I am young but, in my country they haven't sell a single bnew adult size 2strokes anymore for the past 20 years only chainsaws and tiny mini bikes. From what I've known, they took out 2strokes from street use because of emission standards. So if Yamaha improves this system I am hoping to see a KTM 350EX killer that complies with this bs emission standards.
@hakankemerdere4918 Жыл бұрын
Hello. I used YAMAHA RX 115 from 2011 to 2016. 11.7 kW (16 HP) of power provided incredible performance. I was racing 600 cc motorcycles at traffic lights. It is one of the best quality engines produced by YAMAHA. However, the import of 2-stroke engines is prohibited due to Turkey's customs laws and environmental emissions. The RX and RD series are legendary. Congratulations to the engineers who put so much power into a small engine. MADE IN JAPAN
@oswaldoaraujoteixeirateixeira3 жыл бұрын
DT 200R. A MELHOR MOTO DO MUNDO.... PARABÉNS🇧🇷🇧🇷🇧🇷🇧🇷
@caveiraalves3363 жыл бұрын
Conhecir na hora...
@bezsobsaki3 жыл бұрын
Я обожаю твои технологии.
@Alex-bx3ed3 жыл бұрын
Спасибо, что не забрасываете надёжную и не прихотливую технологию.
@Tim_1o13 жыл бұрын
да, только с этими "клапанами" она уже не такая надежная и прихотливая;)
@Alex-bx3ed3 жыл бұрын
@@Tim_1o1 этот клапан выкинуть не проблема, и без него двигатель будет работать.
@Pertamax7-HD3 жыл бұрын
great detail
@PMMCMMCC2 жыл бұрын
これは2st公道バイクの復活の予兆ですか!?
@fazzautowork3 жыл бұрын
I am from Indonesia🇮🇩 I like 2 Stroke engine💨💨👍🏻
@HS-gn1hf Жыл бұрын
アイドルでも高回転でも走るトルクにたまげたよ。すげーなヤマハって
@luisclaudiofaria87182 жыл бұрын
O melhor motor do mundo é o 2tempos,simplesmente maravilhoso....seria o motor ideal para o Brasil....
@kitecattestecke23032 жыл бұрын
Why? Do you like smog from burned oil and noise or what? Advantage of two stroke is power to weigh ratio on and ability to rev high with low component count. For environment its poop because it burns oikl
@nisemonor3 жыл бұрын
エンジン周りの部品再生産してくれないかなぁ。 お願いします!
@screwsnutsandbolts2 жыл бұрын
Excellent animation 👍
@greasemonkeypol3 жыл бұрын
yamaha had the most reliable system all the other brands had issues and problems long term
@larrybabiskyswitchbox.110.3 жыл бұрын
That system has been around for awhile now,cool though
TDR 250 Ypvs owner, many years ago... love that bike. Only, those Nissin brakes were not at TDR 250 level.
@TeddyRSS16663 жыл бұрын
In my country in late 90's there was a 2 stroke single cylinder sportbike model Yamaha TZM 150cc. It has YPVS and YCLS, also have radiator (liquid cooled system). It design look like 250cc sportbike and look bigger than it same class competitors at the market, Honda NSR 150, Kawasaki ZX150, Suzuki TXR 150.
Cool! Thanks for continuing to build these I really appreciate it! I wish I could get a sponsorship and or a job designing the bikes and especially atvs
@eamhhokkanen17133 жыл бұрын
Gotta love tech from the 80's 😁 Anyways next show the YEIS 🙏
Cool video, love it. Now Yamaha just needs to make an E start, 6 speed 250/300 Enduro with KYB suspension and I'm all in. Just about the whole dirt biking community has been singing that song for a long time now but it's falling on deaf ears.
@manoliswec56742 жыл бұрын
they only care about us market dollars. lets hope americans will love enduro as much as mx
@axkoula78512 жыл бұрын
I just posted the same thing 11 months later! 😆 A company with the resources of Yamaha could slap together that bike in a month if they ever decide to build it.
@ddelox Жыл бұрын
I always wondered if you can build 4-stroke engine with a 2-stroke mechanism
@mazbee32743 жыл бұрын
I still use 2stroke until now. 2stoke lovers from indonesia 🙏
@TerryClarkAccordioncrazy2 жыл бұрын
There is no bike like a RD350YPVS for putting a smile on your face.
@satorusunaga29823 жыл бұрын
お〜!新しくなった縦型のYPVS⁉️
@musarapio_hha3 жыл бұрын
long existence at 2t!! ♥
@irzfanfarizan30013 жыл бұрын
I hope yamaha still can produce the 2 stroke spare part cuz is very hard to find the original part this day
@carrosbr12 жыл бұрын
YAMAHA é show 👏👏👏 Muito bom suas motos deixa Honda no chinelo
Wow. Thats pretty interesting design that solves some of the problems with a two stroke engine.
@fidelcatsro69483 жыл бұрын
my rd350ypvs could hit 120mph in a jiffy back then!
@viktorhaggstrom23053 жыл бұрын
Rotax have done this exhoust vale all the way back to 2001
@AuMechanic2 жыл бұрын
@@viktorhaggstrom2305 Yamaha have been using it since 1977
@gundamwin8912 жыл бұрын
2t bikes are still the best 😁
@aluxtaiwan26913 жыл бұрын
so you guys gonna bring back 2 stroke?
@jianoconnor84143 жыл бұрын
If it does come back; will be in a different format. i.e. some different technologies used. Fuel injection for just one. Perhaps in head valve technology. Depends on EPA. Electric may kill Big manufacture 2T.
@manny.92733 жыл бұрын
If your talking about dirtbikes you sound really stupid, the yz250, yz125, yz85, yz65 are all still in production to this day, but if your talking street bikes I find it really hard to believe they are going to make 2 stroke counterparts.
@aluxtaiwan26913 жыл бұрын
@@manny.9273 I'm taking about road legal one,I'm actually don't know if there's 2 stroke dirtbike that's road legal. At least not in my country. not a new one
@manny.92733 жыл бұрын
@@aluxtaiwan2691 well the one in the video is a 3d model of a yz125 power valve system, intended to show the improved 2022 models that had a complete overhaul for the 125 class, but if you want a "street legal" 2 stroke just get a ktm or husqvarna 300 enduro bike, in america the title has the eligibility to become an on and offroad bike.
@rwd3233 жыл бұрын
@@aluxtaiwan2691 the Euros still offer road legal 2 strokes
@alejandracadicamo30853 жыл бұрын
solo imaginarse, con la tecnologia de hoy, como seria los motores de dos tiempos......
@AbdulsCycles3 жыл бұрын
Now I am understand how that engine work.....
@くま太子2 жыл бұрын
素晴らしい技術! ヤマハ、最高!
@knobsdialsandbuttons2 жыл бұрын
Excellent videos ! 👍
@macroevolve2 жыл бұрын
I remember when YPVS came out, on the 1982 YZ’s I believe. It was a little Black box by the gas tank…I don’t know what it did🧐
Esse sitema ypvs é bom enquanto é novo, mas é feito com materiais de baixa qualidade. Logo começa a dar problemas, como travamento, vazamentos, folgas, carbonização. Sem falar no modulo que tambem não tem vida longa. Quem é mecanico antigo, sabe disso.