The Most Powerful Two Stroke Ever - How I'll do it. 

You should get a medal for this. It HORRIFIES me that Two Stroke engines seem to be disapearing ! Keep up the good work.

Don't worry about the commenters carrying on about your clothes. There are an amount of people that just feel they have to say something to be noticed or sound superior and I believe a lot of it comes because they do not understand the topic coverd or have anything useful and productive to add. The amount of whining I get over not wearing gloves or other safety crap is unreal and shows how many people think stating the obvious makes them sound clever. same with people crapping on about environmental issues. Wouldnt have a clue in reality but say what they have heard before so they fell like they will be gaining social acceptance. Love your ideas with the engine. When I first came across you channel a few vids back and you explained your Idea, I thought to myself, this guy is going to come up with something really revoloutionary that will leave all the mainstream manufacturers for dead. I believe that even more now. you have the right personality in my opinion. reserved, thoughtful and calm. I also think you will be honest and truthful in what ever you achieve. You obviously have the knowledge and intelligence so I think you will come up with something good. I can see a new engine named after you which will be the cutting edge design all others follow.

I've never seen anyone that knows 2 stroke engines better than yourself. Brilliant!

wtf people whining about clothes in a two stroke motors channel... like this is a damn fashion channel

Heck yeah! Keep the 2 stroke innovations coming! It's all about trial and error and learning from what works and what doesn't. Keep on keeping on! Thanks for sharing your passion.

This is the reason that i try to help you out on patreon! It's amazing how guys like you are so into things that thry try to mix different, not so well known technologies into old ones and try to make the ideal "version" of an old technology! Love your content and keep on doing this amazing content!

I had an idea bouncing around for a few years that is a variation of your second piston exhaust valve. If Mr. Koenigsegg would part with a component or two from his FreeValve system you may be able to achieve exhaust control without the mechanical additions. Another thought was to make your own sound wave to compliment the expansion chamber's return wave. Material science has come up with some interesting high heat resistant solutions for industry. I'm sorry I haven't researched beyond cranking up a stereo and feeling the volume blow by. One last thought in support of an actual piston, I'd clocked 90° from where you showed it there's potential to stuff the charge back where it belongs. That whole thinking thing can sure become a bit crazy with small engines, wild prototypes can usually be affordable and very interesting. Nice to see you have a plan. Take care, cheers.

My first vehicle was a 2 stroke and I modified that as many ways as I could to the point of it running on alcohol at the end. I miss that smell! Love it when people push the boundaries! I wish you all the luck and positive vibes in making a awesome setup! Love guys who aren't afraid to push the envelope and try things that haven't been done. All it takes is one motivated person with a good idea to change how a certain thing is done. Looking forward to watching it all come together for you!

Excited for this video, as always. Keep up the good work!

Sounds like this is going to be awesome! Probably goes without saying but I'm happy to help out with whatever I can. People actually complained about what you wear?? Wth is wrong with it, and even if there was something wrong with it why would they care, it's not like you're running a fashion channel here.. I just turned 40 and if most of my clothes that I've had since the mid 90s hadn't fallen apart over the years I'd be dressing exactly like that :) I hate buying new clothes because they're all so tight these days, even the so called loose fit ones make me feel like I'm wearing a straight jacket and yoga pants and I have to fold my feet to get into them in the first place. Tight clothes are the worst, just can't get comfortable in them. Back then they knew how to size clothes! In the garage I usually have my sweatpants and lumber shirt combo nowadays to save what little proper clothes I have left from back then ;)

I never heard of clothes making a good mechanic😂😂😂😂

Bought one of those angle meters last month, same as that but silver. Got it for my mill but also used it to check the angles on my ski edges.

People pay entirely too much attention to things like what other people are wearing. Im always so interested in the subject matter of your videos that i dont think ive ever noticed your attire. Keep up the awesome work!

Like the exhaust valve idea. Large diesel engines use poppet valves in the head. Makes it possible to flow bottom-up. They use turbos, not crank, to get the air flowing through the cylinder.

Love see someone working with passion on two strokes 😉

Hey, interesting ideas right there. If you need 3D printing help or parts, feel free to ask. I was the guy who 3D printed the simple carburetor (and I did an intake pipe to connect a bike carb to an engine block with a heat resistant material:) .

I started this series once again from the beginning. No Netflix needed for me :) thank you!

NGK offers 8mm. plugs. Make your new pipes a slip fit over the headers so you have adjustability of tuned length. Cut the headers back as you adjust, so there is no excess header inside the divergent cone. Start long and adjust shorter .250" at a time as the RPM increases. You'll know when it's too short, because the engine will struggle to accelerate on load. Good luck.

I have seen engines before using rotating sleeves ... Cant wait for this project to take shape... 👌👍

Now you've uploaded your latest video I'm posting this again: Mr 2STROKE STUFFING, I have had the good fortune to watch nearly all of your videos (bar about 20) since I am laid up with broken ribs. Half the pleasure in watching them is reading other peoples comments, and aside from that the effort you put into replying to them (no easy task). You can feel the frustration other RU-vidrs feel, when things don't go right for you. As for the editing, well, what I can say is that it's nice to hear the music fade out in this video (around about 3:35) because we can once again hear a highly tuned 2 stroke running on petrol (gasoline) - which after all, is what 99.9% of us put in our tanks and run our bikes on. You can see the thought that goes into your videos, the trudging through the snow until you finally "hit the buffers" is a great metaphor for the way you felt at the time. I also loved the bit where you're sitting there thinking and the "other you" goes and pours yourself a drink. Hahaha, clever stuff! I reckon you could turn your hand to most things, and you're a bit of a perfectionist too. I mentioned in another video that an informative and educational video like yours, where you actually improve a moped's performance got 10k views, whilst another guy pours sand and grit into his lawnmowers oil filler (causing self-destruction) and gets 1.5 million views. This guy is making money off of RU-vid, and you Alex, on the whole are not. This is what I suggest: When you're finally happy to get back to petrol (gas) as fuel, and your set up is proven to run reliably (on the real road as well as your rolling road [dyno]), then you gather up all your homemade parts and copy them, do a deal with the manufacturers so you get a good price for a minimum order quantity on their parts, put the whole kit and caboodle in a box, then SELL it as a kit. All this hard work deserves reward mate! Stick to the day job as long as you like - you're a kindergarten teacher, and a very good one I imagine, too. I've worked at teaching as well: British English to Spanish speakers. This is where I'd like to add one more comment - and it ain't a criticism as your English is absolutely excellent, but throughout your videos you've pronounced the word "idea" like "ID". The correct pronunciation is the same as we English speakers pronounce "Ikea" - the Swedish ready-to-assemble furniture manufacturers. So, having added my tuppence-ha'penny worth I want you to actually read this, so I'm gonna post it again. Just as soon as the next instalment in your "2 stroke quest for the best" video comes out! I hope that when your kids grow up they share your interest, and you can spend time together imparting all your knowledge to them. (If God forbid, we're not all forced to go around riding electric bikes/scooters/mopeds!). Good luck me old china, Jonnie

I remember my grandfather telling me he was amazed when Tomos made an 18hp 50cc with regular 2stroke mix. Im keeping my fingers crossed that this project works.

Can't wait to see the results of this! Sounds like a awesome project and hopefully will revolutionize two strokes (see what I did there :)

Good on you for standing up for yourself! No idea why they are complaining

Your clothes is cool man I'm 44 and dress no different to 20. That timing meter is awesome fine tuning there. You and Mark Atkinson working together both your 2strokes engines are going to be the best ,2 years from now i recon you'll be dynoing a v twin . Not giving ideas for now just future. Awesome stuff.

I remember first watching this video, now look where we ended up. Awesome!

I'm very excited to see plan B , it was something I thought of a long time ago but did not have the means to test, good luck with it I cant wait to see the results of your new designs

Look into the Homelite chainsaw motor. It has a 90°piston as the piston pin is inline with the exhaust. Sounds like similar to what your doing. Cheers

This is awesome, I miss my Yamaha YZ125 i liked working on that 2 stroke engine. Verry cool you are building your own, i will sure follow this from now on.

Great video, not an engineer but understood everything you talked about. Can't wait to see things get going

Awesome. Can't wait to watch the masterpiece take shape!

Interesting thanks, MY 1976 CZ 400 Faulta reolica had a Toriodal combustion chamber I had ported that thing and added a reed valve it had a bridged exhaust port I had widened 15%.. it ran good for a 40 minute moto but would eat a piston after about 6 40 minute moto

Can't wait to see this project develop!

this is amazing. you will revolutionise Two strokes !

"be open-minded for other peoples ideas" important ingredient in the recipe for success!

Your sir are a very dedicated 2 stroke person when it comes to power output.

There is an old guy living in my town who is working with two stroke race bikes for more then 60 years. He has over 40 bikes in his house with 3 dynos and has two Aprillia 125cc race bikes that produce 74hp at the crank after his mods! He says that the exhaust is the part that makes the most difference on Twostroke engines and i guess i can confirm that by seeing the ammount of different exhaust pipes he has made over the years ^^

I don’t watch your channel for fashion advice I watch to learn 😃

Always look forward to your videos, and new ideas. Have you ever done any of this type of engineering on larger 2 stroke motorcycle engines. I have a few vintage enduro racing karts from the sixties and would like to do experimental high speed tuning. If your interested watch some enduro kart racing on full size race track going over 120+ mph.Thank you for reading this.

I like your style bro. The haters can suck it.

Gleder meg til å se hva det blir utav dette prosjektet :) Og fortsett å vær orginal, vi trenger flere orginale mennesker her i Norge !

Your clothes looks comfortable and good quality. I also like the colors and design. (And the fact that they don't sport a big brand stamp on them). Keep up the nice content.

Great videos bro! I learn alot. Thanks for posting. It's great to see hands on videos. Very informative.

Keep up the good work man! Love to see some good 2 stroke tuning, make's me want to buy a 2 stroke again just to fiddle with in garage! Greetings from neighbour Finland! :) Going to support you on pateron next salary payday!

This is getting good!

Your clothing style is absolutely ok. No need to worry. I almost dress up same way most of the time.

Great site and the passion for continuous improvement. A true open minded engineer.

Contrary to popular belief, I'm very interested in what your doing. If you check Mikuni charts, 32mm carb is suitable for about 50bhp per cylinder (in multi cyl applications) You've probably done the math, area of carb is 804.25sq mm. PWK isn't highest flowing carb but it is way cheaper than a smooth -bore or Kei-Hin CR.

had a ported 1979 husky wr 390 was amazing wheely every gear down the beach had teflon treating as well...

you make my day better. your videos are awesome.

Haha I feel you with the clothes.. I’m a 85’er me too and skate 😅 Leave us alone good damnit! 😂 Your new specs on the motor seems cool 👍🏼 Good luck man!

En annen ting du må tenke på når du går for 100% eksosport er rotasjonsretningen på motoren. Hvis motoren går den samme veien som hjulene ruller framover og du har eksosporten framover er at når stempelet går oppover igjen så vil stempelstanga presse stempelet mot framdelen av sylinderveggen og det er fare for at stempelet vil butte i eksosporten. Med sylinderen snudd 90 grader så eliminerer du det problemet

Youre a badass. I support you, your clothes and cocked hat are sick. I dress similar im 29. How do i support you?

Really interesting and very cool. Your thought process is remarkable. Hoping for your sucess.

exciting stuff... supercharger and drum controlled zorst valve sounds like its got big potential too ! sticky's 'buzzwangle' tool looks bangin'.... I want to tune the fek out of old vespa gs 150 ( reed valve and stroke - an original piston ported barrel )… should be fun :-)

You can get 1/4-32 threaded spark plugs, they're used a lot for small rc engines

I remember in 2006 at sweden, in the classic tt race, I was checking stuff on the pit and on the market place there. One guy selled a new 50cc Honda NS50R racing bikes cylinder. Don’t know the stroke of that engine, but the ports were Huge and very, very high! Seller said it has 17hp out of the box. And said that specialist carve out from that cylinder over 20hp easy. He resists to gave the portmap for me, but if I remember right it had atleast 8-transfer or so? But the sleeve was like full on holes, and had sick port areas.

I can do small lathe work for you! Only a small disadvantage I live in the Netherlands

Love the ideas! Looking forward to the progress.

I had kinda the same idea about you plan B but with a rotating disc valve. Would love to see if this works

Very very impressed........but one thought. Maybe look at hub centre steering, to try & get frontal area down? Keep up the great work.

I wear the Same stuff as you, I dont know Why People even care What you wear, Its your life And Youre house do What you want!

Can you do a video explaining how to design an expansion pipe as far as the math behind the cones, inlet and outlet sizes and how they relate to rpm, displacement etc. I get the function but not the math on size for proper resonance.

For your plan B exhaust constriction take a look at a Suzuki lt500 engine design. Found on a 1988 Suzuki Quadzilla lt500r. Incredibly hard pulling engine from low rpm

I can draw up a cylinder in 3D on solidworks if you need. I can also print multiple cylinders with PLA filament on a Prusa MK3.

Really enjoying the series so far. I'm also working on my own 2stroke cylinder for a moped (!?)

You should look at the Parilla 100 cc reed valve “IAME comet” Kart racing motor 20,000 rpm wicked power. I also had a McCulloch Barnet racing motor that had a split intake with dual carbs feeding the crank case and one feeding the reed valve with pretty much open exhaust chamber.

Could you make a video with just the basics on porting please?

Wow looking forward to this Bro

This is gonna be the sickest thing ever

Incorporate a fluidic diode in the transfer port to eliminate back-flow and extend blowdown time.

Love your videos, Always very informative

Unfortunately, the Bourke engine will always be the most efficient two stroke. Love your design though. But becarefull while drilling up ports, if you lose cylinder pressure (intake exhaust pressure), your engine will die out. You will certainly need intake pressure there, and not lose any exaust pressure also, Because there would be a nasty explosion out of the exaust, or You would even do a pulse jet out of the exaust!

I am really happy that you and some other guys, continue to R&D 2 stroke technology cuz, 4 strokes have no chance, against 2 strokes. The most powerfull piston engines in the world are ALL turbo 2 strokes ( marine engines). The complexity, size, weight and, lost ''2 strokes'' of a four stroke engine is ridiculous!... Keep-up the good work! and, try to make em emission friendlier, so the governaments, accept them again :).

Going back to your comment on ceramic coating on the cylinder head, why would you want to retain heat? My understanding is that the more heat drawn out of the motor the better. This is based on Carnot efficiency, the colder the cold temperature is, the more efficient the engine can be. Am I misunderstanding what the cold temperature is?

Love the source bmx hoodie ✌

Man I’m 36 and still dress like you 👍🏻 love your work, you’re a genius. Easily my favourite channel on RU-vid. How much of an impact on overall power does crankcase volume create?

You're crazy!, Keep it up !, I love your videos!

What's the blue grass music that plays when you're using inclining tool? There was other cool song in other video that i really liked. Put music info on video notes. Cool stuff btw!

Use as long as possible connecting rod. This gives more time for burning and changing the gases. The piston moves slower near TDC and BTC. I like to propose to use two exhaust openings. When having two exhausts you have two whirls inside cylinder instead of one. The smaller vortex works faster and the gases change faster and you'll get higher RPM and power. With two exhausts you'll get about 18000 RPM with efficiency. I'm sorry and don't have time to design the openings for you.

The pipe is key on a 2 stroke. FMJ may be at play. Your phone has an app for degree measurement. It is accurate to a tenth of a degree.

we were using port area to time in the early 70,s, , the combustion chamber i cant see working as i made so many different types of head , what i never tried was the combustion chamber in the piston and a flat head, as i said before you need to find all the sae papers on two strokes development , especially gordon blair ,q u b work on port flows , but as over half the power is from the pipe , we made hundreds of pipes

What is the advantage of running a smaller sized spark plug? more hemispherical shape in the small head without the plug being so large?

I hate that you need to waste time talking about dumb stuff like what you wear. Love you channel bro, keep it up cause i have a lot to learn still from u still !

Maybe develop a dynamic exhaust. (Changes length with rpm for optimum power throughout the rev range.

There’s trolls that give a damn about your clothes? Screw them. They’ll never accomplish half of what you have, regardless of what they wear.

I really want to learn more about what you do with 2 strokes Engines

Hey, would it be technically possible to run a rotary exhaust valve to increase torque at low RPM ? The position of the rotary valve could change depending on RPM by using a vario like system. By doing so you could change the engines diagramme depending on RPM, in addition you could even turbo charge a two stroke ...

Gonna be awesome man

from 2:30 .. mind blown. you never know how much you dont know

Try standard sizes so we can compare.good to see someone thinking

2 stroke stuffing love youre videos! but i have 1 question what are the blue fairngs on the spx and where can you get them? Greetings from germany.

What if you make the header of the pipe thicker, so it stays more hot

Spennende stoff, tror du må teste plan B med en ekstern kompressor som pumpe istedenfor, eller i tillegg til veivhuset som pumpe. Du kan bruke veivhuset som pumpe for noen kanaler og så bruke kompressoren til å lade overtrykk med på en port som er timet av noe annet enn stempelet.

A two piece piston with latency for the head from the seer which intakes fresh fuel-air mix then compresses it through the piston head/crown on the up stroke? Oh.

I never understand why people focus on one thing when the bigger picture is the primary thing to be focusing on. Some people I just don't get I hear you on that believe me I hear you I get criticized for my clothes I even wear two different shoes by accident but I thought that would be a fad by now LOL hey keep doing what you're doing follow your heart sometimes we tend to focus on that one negative comment and let that get us down I know I do it myself hang in there you got it.

I must apologize for my last comment, i was awake for 45 hours straight double shift at work. When i read my comment it sounded like my thoughts were running in circles - they were sorry about that. I should not think and type while stupid. I am excited to see where this leads - uncharted territory perhaps? I think this will be some really good stuff man. Wow people bitch about the clothes you wear?? Get a life dudes. Who freakin cares if you do, worry about what covers YOUR own ass not someone else whom can clearly dress themselves - without help.

Enjoyed the video! i got my large mill up and running finally, let me know if i can help out. Hope to have a lathe soon also.

Hey buddy a Stihl Ms193t exhaust is 90°from the intake. IDK if it is relevant to what you are doing but it may give you some ideas.

Hei mate, where i can find the draw with the dimension online? Thank you, very good job. I'm also interested in making this thing on my Piaggio Ciao. I want to make it fly!

Hey ! Great video. What program will you be using to simulate the ports ? Thanks.