how to move 2 stroke crankshaft to increase power

[@Miwka2TMagic]

Молочага! Наконец-то показал в деталях. Но некоторым хэйтерам нужна точность на стрелочном индикаторе во всех плоскостях. ;-)

[@Looney_YKT]

Лучше новую купить

[@Pikulev_Evgeniy]

@@noidontthinksolol KZbin recommends watching this channel. Why are you here?

[@mrdjangofreeman5560]

Impressive again and mega congrats ! 2 quick hints if it would be necessary however: +/- 0.05mm at the crank shaft end to be set, and maybe, a small tig pointing at the connecting rod head axle, especially on 2 cylinders engine, but 1-cyl as well. Meanwhile just wondering about the resulting benefit, Vs. increasing the combustion chamber pressure (surface milling), aside the longer stroke effect (more volume displacement) and risks (comb. chamber vs piston interference, piston skirt vs. Crankshaft mass). Last hint, in term of dynamic design, square stroke x dia sizes provides usually a better balance.

[@therawlifefamily]

This seems to be how they make a supermini. Big bore to get 105cc, then stroked crank to get 112cc. Seems like a ton of work too.

[@mrdjangofreeman5560]

@@therawlifefamily thx, yep i guess so too :-)

[@ferrofilos]

now i want to buy a hidraulic press, great work men! keep shearing it!

[@williamklein1221]

I find it interesting to read all the comments about how bad this modification is. How about lets see some "Looks great. Here's the innovative difficult ground breaking think that I did." Show us what you have done, not beat down this man's project. Billk

[@ittybitbobo7657]

Its so much fun to beat down stupid projects. If you dont know how stupid it is have a real engineer explain it .

[@williamklein1221]

I have seen any number of his projects run, and run well. As I have said. Show us what you have done. Where is your channel???? Put up or shut up. Billk

[@friskahapsari6549]

make longer stroke, balancing crank, cutting bottom of piston, add spacer of cylinder body, get bigger capacity, adjust timing order, ussualy custom exhaust and intake also.

[@edwardbrodie2190]

@@theelectricunicyclist9069 We'll see, every one of his other builds so far he's put in a bike and ran.

[@sepg5084]

@@williamklein1221 i am not saying that this built is dumb but what kind of logic do you have? By your logic, no person can call out something if they cannot do one themselves? Lol, what are you, a child? If i see someone build a fragile glass helmet as a riding helmet i cannot call it out if i cannot build my own helmet? Lol, ok 😂

[@MrNigel1340]

A simple but very well performed modification, I found great to watch, regards Doc Cox.

[@Ns200-b7i]

I respect you bro lots of love from India 👌😍

[@nigelbutler9488]

Le Dan. I wish i lived closer. So inventive

[@dondagy9109]

Offsetting the crank pin to make a stroker with buying no parts. All labor. If you chuck the crank back in the lathe once you get it assembled, you can use a dial indicator on the second side so you get a better "clocked on the crankpin" balance job. Its more accurate than just a straight edge to check the squareness side to side.

[@Cinncinnatus]

think the bigger issue is the hand pinning on the re-assemble when it original was so tight it had to be pressed out. think this vid was more of a concept/ability to do it more then actual practice. there was a lot of things skipped like before even dis-asm what was the width on the main rod, crank bearing space etc etc all the other steps when dealing with cranks and rods. It was a cool vid but as you point out there def some flaws/improvements to be looked at.

[@Taz6688]

Impossible to know what the gains are or were, without proper testing this could lose power, I used to know a guy who raced, his dad was a bit of a tuner and always worked the ports, he had the "touch" he stayed in the rules as to port size but he had more power and torque, always pulling away from the pack, I would like to see some results from a stroker rather than one thats been ported.

[@92gashaulass43]

@@Taz6688 i had cg engine on dirt bike chassis called crf150l here in indonesia,my crank pin offseted to 2mm up so my stroke now increase 4mm fron the standard 57.8mm,adding 5nm of torque across all range & more fuel efficient due to bigger engine stroke😀

[@coreymatthews9921]

@@92gashaulass43 how do I get one of those for 98 kx 250

[@92gashaulass43]

@@coreymatthews9921 hard for 2 stroke,mostly here using 4 stroke engine and standard connecting rod then we machining piston to match block height if possible or adding new spacer in the bottom of cylinder block and new camshaft chain,for 2 stroke engine need to adjust the port for added piston height af bdc and make new spacer bdc or if you can use connecting rod that shorter from your standard ones,but i dont reccomend this because shorter connecting rod ratio can have bad effect on cylinder walls

[@sicks6six]

No dial gauge for the Web alignment just a steel straight edge. Wow. I admire your trust in your eyes. 😮 You will have to use a packer plate under the barrel to keep port timing correct so no gain in cc just a longer stroke so a less revving engine which in turn will lower BHP at the wheel unless different gearing is used. A gain in one place = a loss in another place

[@SalvadorHernandez-to2gq]

This procedure is called re-phasing, which gives you more top end torque. It's an old Mechanic/Machinist secret use in old school racing.

[@Ghost-vf2li]

Can't tell on my phone. Is he stroking it, Moving the crank pin straight out fron the main journals or is he offsetting it to one side to change the rod angle at tdc?

[@abhimanyuinjeti5326]

Can you explain it a bit more?

[@robatlarge3478]

Good stuff. Have done this before myself. This in combination with another mod or two can really breathe life into a small engine.

[@butziporsche8646]

How much stroke increase? This is some real Allen Millyard shit you have going here. Awesome.

[@phuc9468]

Mong anh làm về hai thì nhiều hơn em thik dòng hai thì lắm mãi ủng hộ anh🥰🥰

[@trailangson9414]

Ai biết le dan là người ở đâu không

[@chiucnguyen928]

@@trailangson9414 kiên giang

[@trailangson9414]

@@chiucnguyen928 oh

[@Jodyrides]

Changing the stroke completely changes the port timing on the intake and the exhaust. How do you compensate for the piston striking the head? How much lower are the RPMs now. Is the ignition timing going to complement the lower redline?? was The crankcase capacity taken into the calculation the cylinder capacity? The intake timing, the transfer port timing, and the exhaust port timing are all considered to work with the ignition timing. Not to mention, the exhaust pipe/exhaust expansion chamber is designed to work with a certain capacity. this crankshaft does not have keyed crank pins..I didn’t notice you truing the crankshaft halves to each other.. did this modification concentrate the power band or expand it? Because all of the port timings and ignition timing were designed to work with a certain length of stroke. The stroke is now changed. Even the transmission ratios are figured to complement the power band.. By making the stroke longer, did you shim the cylinder up at the base? Or did you shim the head up by putting additional head gaskets? If you just shimmed the head, how did you set the timing? A standard timing would be 2 millimeters before top dead center..With a longer stroke, the standard ignition timing spark will arrive earlier, increasing the likelihood of detonation.. i’m not saying it won’t work, I’m not saying it won’t make more power, I’m just saying that there is a whole lot to consider when you change one thing, everything else changes.. i have seen tuners always tweaking things, and always making their machines less reliable and slower.. I did the same for my first two years of road racing two strokes. My third year I decided to leave the machine box stock and just concentrate on learning how to ride rather than constantly repairing the machine which I ended up modifying into a pile of junk. After I started leaving the machine bone stock, I won six road racing championships and two national championships, on a bone stock utterly reliable 250 2 stroke.. after i finally realized that it was not the machine that was slow, it was me..

[@TheNeroScout]

U should watch video from south east asia. we have faster 2 stroke here. 125cc can go up to 185kmh on GPS. 150cc can go around 200-220kmh. We only increase the stroke around 0.8mm and maximum is 2mm.

[@djrug]

So you being fast on a faster bike would be - even faster. Go figure.

[@dwightlee866]

@@djrug Naw, he obviously can't figure.

[@friskahapsari6549]

@@TheNeroScout sure, we also adjust the length of pickup coil, for fire order.

[@holmes1956O]

Maybe before making haphazard modifications you should have done some research and learned BEFORE modifying your machine. Longer stroke mods have been done for years very successfully even invisibly from outside the engine it is called cheating by some

[@RustyorBroken]

Goodbye rotating assembly balance. It was nice knowing you.

[@TheLuckyfreeman]

wow that is neat that's how you do it, need to build one from scratch and it is all built on a lathe turned down from a big diameter piece of steel 2 sides then the center journal is pressed into the perfect hole with thin shims and the bearing in the middle. need to make a stock one I won't be racing the bike just riding it around town

[@johnvanberrgem286]

You have some skills man👍

[@warrenafflick6498]

That is a very nice fixture you have fabricated.

[@GUEST-qw4te]

In america, since what you did was offset grinding, we call it a stroker.

[@bradappel9928]

Beautiful craftsmanship

[@HuyNguyen-er4do]

Hay quá Bác ơi, kiến thức rất bổ ich, Vn khá ít người làm được

[@phuoctran7542]

120 hai thì nó gần tương đương 250 bốn thì rồi mà còn chê yếu,cu cậu này chắc muốn mau đến với ... tổ tiên đây.Mình thấy Su mặt quỷ đôn rồi,kéo một phát,đầu piston thông nhau luôn.

[@luisfernandogiraldoabad1518]

Excelente...!!! Lo único malo es que no diste el ajuste a los rodamientos laterales del cigüeñal, pudiste aplicar soldadura en la pista del cigueñal donde va el rodamiento y refrentar la cara del cigüeñal y el eje al mismo tiempo( 0.01 mm) de interferencia y listo.

[@tonyloechte9994]

I reckon it’s great Doing at home what costs a bloody fortune at the bike shop Top job Lee Dan.

[@khanhdiepvu]

Lên 2 xi lanh cho dòng 2 thì luôn bạn ơi...mong chờ siêu phẩm....!!!

[@Le_Dan]

Lên rồi đó, vào kênh xem đi

[@djrug]

Love all the comments from 2 stroke nubs on this. Stop being restricted by what is available on the shelves. You will be amazed as to what a good set of carbon reeds, a stroked cam, a metal gasket set and a proper resonator can do to a small displacement engine.

[@kcrichton7485]

Yep, all you need is 50k of tools and years of machining practice, or could just buy something much faster and save 45k hahaha

[@djrug]

@@kcrichton7485 not really. It's a 2 stroke. I don't know about where you live, but I could saw up 2 cranks and have them welded, balanced and rehardened within a week. I don't have 40ks worth of tools etc. Because other people do. 🙄

[@krotchlickmeugh627]

Lmfao if its available on the shelf. Its because someone like me spent years and unimaginable sums of miney R&Ding it. That means i know that my product isnt going to fail and that the reason im making it makes sense as a sales point. You muppet. What this guy did is take a worn out crank and make it look like it wasnt worn out. Lmfao. That crank is useless. He just made a grenade

[@djrug]

@@krotchlickmeugh627 you have never heard of stroking an engine? Wow.

[@karlalton3170]

Làm tốt lắm Dan 😁😁🤘🤘

[@dutchsailor6620]

This used to be a common mod on Yamaha TZ350 crankshafts to make the engine eligible for competing in the 500cc class. I think most of the extra power came from the narrower squish band.

[@jasonbell5905]

Like the sandals in that high tech machine shop 🤙🏼😁

[@anrc9488]

Hay quá mãi ủng hộ anh

[@kowski9477]

Good video....now i wished i had a lathe.

[@MrQuan6789]

Hi vọng 1 ngày ko xa ông kĩ sư này sẽ nhận nâng cấp xe cho ae đam mê xe

[@curtisaric2059]

Nice tooling!!

[@pbmachines972]

That’s awesome I weld barefoot too

[@bikebreak4523]

man ... I wish crank bearings fit that easy 🤣

[@friskahapsari6549]

I ever made smooth like that, so the case will safe for longer time. while its getting hot n cold every time.

[@lifelesskids]

For 2 stroke it's normal to have loose bearing at crankshaft, but tight at crankcase. For 4 stroke both need to be tight.

[@holmes1956O]

Those are mock up bearings honed out to fit easily for truing the crank not the bearing that the engine will see

[@arvinbadz]

Noo you wouldn't want that. My 2T moped had to replace crankshaft because of loose bearing. it woud cause rattle at any rpm

[@applanateearth586]

Thank you for sharing hope your vision results in good power!

[@domenicozagari2443]

You can use a 2stroke motor like a sterling engine.

[@哲人細井]

外国人でポップヨシムラが居るのが嬉しいです尊敬します🎵

Hay quá bạn ơi 👍🌾🌾🌾

[@nicusecan7998]

A real master ! Great job you make Dan ! :)

[@hamka6618]

Cảm ơn bạn với những video hay

[@mshahzad8019]

Nice jnb from Pakistan

[@vejno17]

Привет из Санкт-Петербурга 👍

[@djisydneyaustralia]

Brass shims will stop your tool sliding. Higher friction coefficient opposed to steel on steel.

[@alancollard8939]

i love the stroke measure but changing the stroke on a two stroke changes the port timing if you use the same deck clearance never found it makes much difference ,changing the bore is the easiest way to increase capacity, but that doesnt work on two strokes either as shallow wide ports have a poor port window area , but i would also worried about the interference fit of the crank pin if you could used a big hammer to assemble

[@tnc4700]

The power numbers may not show it but port timing can be ALOT of extra speed/TQ when we are talking small/low power 2stroke

[@PA-Tammy]

100% Love the big hammer tho...

[@oldhillbillybuckkowalski]

So you increased stroke length, when can we expect to see your video addressing the need for a spacer or stroker plate under the cylinder to keep the piston from hitting the cylinder head unless a custom short piston or short connecting rod is to be used? Equally important, now that the crankshaft has a longer stroke, placing your reciprocating weight further from crankshaft centerline it will need to be rebalanced to avoid excessive vibration and premature failure.

[@LSturboguy]

none of that is a serious problem you could possibly machine the top of the piston as 2S-MC pistons are notoriously thick, also you could have a custom piston made which would negate those issues if you wanted to use a spacer that is also nothing dramatic either as most 2S mostly use oring for head to cly seal if you are doing the stroke on a 2S-MC you are not a novice so you would have it rebalanced any way

[@LetsPlayDoni]

I think the video wasnt meant seriously

[@dmsentra]

Along with the piston coming farther down and hitting the crank, or the rod hitting the case at bdc

[@motox103]

I agree! and there is also a chance that the rod could contact the case at TDC. also no side clearance was set on the rod bearing, and the crank pin was not nearly tight enough, I have never seen one just simply pound in! a press has always been needed on the cranks I have redone!

[@oldhillbillybuckkowalski]

@@motox103 I've had to put the cranking in the freezer and the flywheels on a hot plate before to get them to go together, doing it with all parts at room temperature was making my press make weird noises and making me nervous. Having had a press eject a part out under high pressure once before was enough for me. That was on some Yamaha YZ450F builds I was doing about 6 or 7 years ago.

[@fredrikvanlienden6749]

Awesome skills!

[@zapwatt]

That pin definitely won't mushroom out when you hammer on it. Also I do my best welding in sandals too. Please excuse me while I use ramen and glue to fix everything.

[@markallenarcano9439]

Present Bro 🙋 from Philippines

[@carfran53]

Amazing job, as always.

[@Elbribon1]

Do you have to install a shorter piston after that?

[@ferrumignis]

Needs a reworked barrel as well, all the port timings will change.

[@michaelcalderon4401]

Osha is watching this going crazy welder and sandals in the same picture 📸 😅

[@andrewvoigt1133]

I wish I worked in your shop with you. I mis running a lathe and I have so much I want to try with scooters.

[@CMAenergy]

You showed some machining, but did not reference as your title said How Which way and by how much, and if you moved it towards the top, hw much clearance will be left

[@gasolinaoleo2349]

Pretty good,Nice job

[@GUEST-qw4te]

Now show us how you made the tooling to do that.

[@tahirmahmood3765]

Very good and very nice to work God bless you guy

[@rumpoh8039]

IT WILL REV LESS BUT HAVE MORRE LOW DOWN TORQUE

[@guirima]

Selamat malam selamat atas konten proses las mig, jenis kawat apa yang digunakan untuk pengelasan, apakah kawat biasa atau khusus yang lebih cocok dengan bahan potongannya?

[@OppoOppo-pm8ow]

Chào anh.anh có nhận hàn chế gắp nhôm không anh..?

[@Creatives-World]

Weldone gentleman i am from Pakistan and i know a person who modify crank.. how much millimeters you made difference

[@senangsenang01]

It you change suzuki gamma connecting rod? Or?

[@jeffreystroman2811]

Now that's one hell of a craftsman

[@MD_GR5]

Làm cây dên đã quá a

[@phamphongvlog2]

Có chế đc con máy 2 thì 125 cc lòng nước có đề chạy ván lướt sóng ko a

[@happygoluckyperson]

Can you show us how to convert exciter 135 to 2 stroke. Plz 😁

[@salamjayatekhnik7275]

Rapih banget naikin penstruk nya... Bengkel bubut nya dmn mas ???

[@carlitogayuma5006]

Good job and interesting

[@marklutwyche8578]

Wow nice work 👏

[@jakeharding4510]

Ive had alot to do with the manufacture of motorcycle cranks. This makes me cringe, id sooner make a new one from scratch. But if it works it works 👍👍

[@holmes1956O]

They work. This is nothing new. I am 66yrs old and have seen this done since I was a teenager

[@ThienTran-dn8ru]

Anh Làm raider xăng cơ 2 máy đi ạ🥰

[@tuuhoang362]

bên bạn độ hai máy giá thành bao nhiêu cho một xe độ vậy bn

[@SOVEREIGNDesigns]

Did that move the pin out? Wouldn't you have to fill in the hole all the way and rebore to do that. Or was this just to clean up tolerances for a new pin and bearing?... Stroking it would increase power but I don't see that going on here (as stated in the title). Sweet rebuild though

[@Matthatlungoc]

Đầu tư cái mâm 4 chấu cho dễ làm bác

[@gimgunn7270]

Impresive good lathe skills

[@vs6747]

А почему индикатором в конце не проверил? хотя и так видно биение около 7 или 8 соток, без камеры поправил? Совет при сборке коленвала неплохо немного нагреть половинки 70-80 С сборка происходит качественней и легче, ну а так конечно лайк.

[@Thocokhi-yy3mo]

Like 👍 đã. K cần biết xem ntn

[@zimmy4119]

Có đặt hàng làm mái 2 nong k anh

[@denardmcheaven]

một bản dựng rất nhiều thông tin, bạn có thể thử làm bình xăng dự trữ của cc thấp hơn như honda xrm / rs125 underbone, nâng cấp bình xăng lên 4-6 lít, nghĩa là ubox sẽ được chuyển thành bình xăng. Tôi đang tìm kiếm ở đây trên youtube nếu ai đó đã cố gắng xây dựng. cảm ơn và nhiều quyền lực hơn.

[@alipim3504]

Parabéns sou do Brasil excelente trabalho

[@pauljanssen7594]

It would have been easier to make any offset connecting rod pin and then once you get it in place everything correct then you weld it in place.

[@asateknik]

Very nice work 👍

[@jakeharding4510]

30 metric ton of thrust it should take to press a crank apart. The bore is normally flame hardened Seeing it assembled with a hammer is sad, it WILL fail

[@nazrlol8102]

nahh. these things are more reliable than what you think. my country love to do extreme modifications like this. standard 54mm bore to 72mm big bore. increased the stroke by using this similar way from 58.7mm to 72.7mm from a 135cc bike to a 300cc cruising down the highway at 2++kmh speeds been using it for 3 years now never had any issue

[@holmes1956O]

Hmmm. The crank in my 550 suzuki 4 stoke is all roller bearing and assembled in this way. Because of the performance improvements I have made I tig welded the crank pins to the flywheels to prevent movement under stress. No issues.???

[@techniquebioelec]

Hello how did you increase power by this action???

[@ideyzyadi3142]

Hadir menyimak salam sukses n sehat selalu

[@inalabchanel6999]

Mantap bang keren..the best

[@airport4173]

INCREASING STROKE just makes more torque but LESS MAX RPM.

[@dch-chihoang7658]

Thách anh làm đc trái 145mm đấy 💪😂

[@sergiososa5855]

excelent!!!!👍👍👌👌👌

[@eliterry3785]

Beautiful!

[@Ns200-b7i]

Bro we need you in our country

[@baococ]

HELLO FRIENDS SHARE VERY GOOD AND INTERESTING VIDEOS❤❤🇻🇳

[@ibrahimyahmadi3897]

For small cc engine it works but for large one like 450cc it won’t works and maybe cause hard kickstarting

[@holmes1956O]

Lol. Wrong. Bigger bore and longer stroke can be bought for 450. Do a google search

[@tizianocastro38]

Did you inserted the ball bearings with the only force of your hands? I think that motor will have some problems.. 🤔

[@gregthemechanicman]

some people who build stuff all the time make setup bearings and setup bushings to make fixing this stuff easier the next time.. i have tons of bearings i have machined out a tiny bit to make putting them in and taking off easy so I can get rear differentials setup quicker and then use the new bearings so they stay perfectly clean until final assembly.. especially while getting shim thicknesses right and having to press a bearing on and of 10 times to get just the right preload.. those might be setup/test bearings .. as that fixture he has to mount the crankshaft isn't just for one use I'd say he does this a lot..

[@iketutperdi873]

Channel yang bermanfaat👍

[@BhimSingh-rk4zp]

Wonderful Technology........ RAVIWAR........04//12//2022..........

[@cutinie9887]

Hay quá a ơi

[@naolevan5482]

có đại tu xe Minsk không ah

[@bsracer85]

what are y using as a coolant

[@duchuynh473]

A làm máy wave chạy bằng dầu DO đi a

[@hoost3056]

Is this the ASMR version of Two Stroke Stuffing?