The Most Powerful Two Stroke Ever - IT'S ALIVE! 

Realize that I forgot half of what I was going to explain in this vid. The pipe, the piston, port timing, simulation software ++ Have to make a script or something. Anyways, already started on the next vid, different carb, see if I can find some softer reeds, maybe stuffing the case for testing ++

It took me exactly 0,0001s to click on this video.

Been waiting almost two years for this moment! Can't believe how fast it's gone!

13:00 minutes, NO you didnt make me more confused, I understood it all and was hanging on your every word! been following you from the start, so glad to see it get to this point, KEEP gooing

I have never switched youtube videos this fast in my life.

Liked immediately, been watching since motorised bicycle build and I've got to say the quality has got better and better with every video you post. I hope to see you break 100mph at Bonneville. Just thought I'd add I built a motorised bicycle and managed to break 70kph with a downhill boost. :)

love this serie so stoked you are back 100% greets from the netherlands

That's amazing! I have been following your project from the beginning, and I'm so excited that it actually works. Congrats man, keep working this way!

You know your stuff Sir. Thank you for sharing this video. I enjoyed it very much. The awesome two stroke in all its glory. The power uptake on these things are amazing. I love how they sound, how they run and how they are put together. That's probably why I have been bisecting and examining them myself for the last 25 years. Thanks for sharing this video! Craig

Your like a mad scientist!! creating a beast of a baby 2 stroke motor. I have followed you for a few years now and it keeps getting a little bit better every time. Keep up the awesome work.

Thanks for the update! I really love seeing people go all in on engineering stuff to make it better

well done alex. good luck from australia. im looking forward to your 50cc 2 stroke breaking a land speed record :-)

glad you're back with some 2-stroke vids! gtrs from the Netherlands

SHE LIVES! 👏 Congratulations big man. Also love how you simplify everything near the end - no doubt this vid is going to see a lot of new viewers, I hope you get as many addicted as I am

I have been following this project since last year. Glad that it alive now.

Every Nikasil cylinder I’ve ever worked with - from Porsche 911 to Honda CR500, I’ve sent out to a machine shop with Sunnen CNC honing equipment and diamond cutting stones. Where we could, we used torque plates.

It’s good to see you excited about this engine again. Best to hop to it before the competition steels your ideas though! Nice job, your very smart.

Been following this journey and this channel for a long time. I hope people appreciate how badass this is. This takes so much time, energy, and dedication to see through, amazing.

Can't wait for the next vid, sleeve and ring sounds good, then you can be certain that's not going to be a problem

Here's a suggestion : use molybednum for piston ring's friction side Piston to ring side is fine to use current metal

Great job man Build a complete engine I hope you get it run well You'r almost there i think You must have a lot of patience for doing this all Good luck

Awsome been waiting for this👍

I now know what I’m doing for the next 17 minutes. The moment of life is at 5:55

the first time i saw your videos i came across you machining a crank case. That clean cut informative video all on its own earned a subscription. that was about 2 years ago if i remember correctly this is the first time since , your videos have been on my suggested feed. good work brother. i cant wait to see the results

Such a pleasure to see you solve the puzzles of your design. Thanks for taking us along.

AMAzing absolutely brilliant well done 👍🏽 waited patiently for this moment

Great to see you back on this project again. For I while i was wondering if we would see any more.

Excellent! I am so happy to see the progress you are making. Keep it up and stay safe!

Whooo!! CONGRATULATIONS! You can do it!💪 Cheers from Northern Sweden 🍻

Congratulations!!! I know you still have much to do but it's awesome to see it fire and hear it come to life!!! Even for a few seconds.... You came a long way.... Great Job Bro!!!✌🇺🇸✌

It lives! Damn, this is so inspiring! You really made my day, I have my own projects that are grinding on, but perseverance pays! Congrats!

Skål!🍻 Snyggt jobbat! Mycket underhållande och fet kvalité👊❤

That is badass. It's about time someone advanced 2 strokes. Keep up the good work.

Congratulations on getting this far. What a really great project.

2STROKE STUFFING pro tip is to check your sellettra ignition with a timing light... as a moped mechanic i found out that the ignitionpoint of most aftermarket ignitions dont got the right markings on flywheel and stator and can vary ignitionpoint upp to several MM before and after the markings.

IT ALIVE :O Love your videos :) i wish i had the skills that you have =) keep the good work up

That's one massive milestone! Really amazing what ingenuity and relentless work can achieve...

Love watching your videos! They are so interesting. Keep going!

This is a great milestone! Its only upwards from here on out! Keep at it!

Glad to see it working, progress man! Btw on a pumper carb, it can help starting when you choke it with your hand. You kinda need three hands in your case to operate the throttle.

Wow this is so exciting to see this come together! Yep, harder ring needed for sure! It sounded good even though it was running weird!

Randomly saw the last video in my suggestions and now I might get to see it run, awesome.

"This is a resonance system not a pump" So this is more like a pulsejet than a two stroke. Brilliant!

Awesome, congrats! 🙌🏻

So cool! So nice to find such an interesting channel! Amazing work!

So in other words you have just made a 2 stroke pulsejet?

Great to see these videos once again

Amazing been working a while with 2stroke and you look just like an normal dude but you're an genius

You are one SMART feller...can't wait to here it blasting across the track...keep up the awesome vids...

I have never commented on anything Mr 2S Stuffing, as with others been watching for ages and great to see these vids. I hope your proud you should be and with the limited knowledge I have in this field your future direction looks to have huge potential. You rock bruva and I look forward to further posts and progress.

Been waiting for this!

Keep going buddy I am absolutely loving this series on your quest.

IT'S ALIVE!!!! YEAH YEAH YEAH YEAH YEEEEAAAHHHHH BUDDY!!!! IM SO DAMN GLAD TO READ THAT TITLE AND START WATCHING THIS LITTLE BABY BEAST OF A SINGLE CYLINDER BLOW SMOKE!!!!

Nice mate, good to see it finally running good!

Ive been following this series for 2 years, can’t believe it’s finally done. From paper to reality, I salute you man, congrats.

Great job !!! Hearing it works is amazing

Härligt Alex! 😃👌 So much, if not all, of what I have learned (and forgotten) the last 5-6 years about 2 strokes is included in this engine...and then some. So pleased to see a guy in a small garage pointing out details most “big names” still get wrong. I think it sounds angry and with potential. Keep posting. 👍

Looks amazing m8.

I absolutely loved seeing it run... now I'm excited to see where it goes from here!

Great work, technik and ideas and workscraft. Greatings from Germany

Lovely, i bet u will break hp records and make a huge gap of more power then the current guy holding the record of most powerfull 2 stroke 50cc engine, im stoked to see it run when it will be at its best! Great stuff dude!! I never missed a engine video of your project since the beginning

Great job bloke! Keep it coming!

Have you ever considered making teaching focused videos, your knowledge always impresses me

Love your channel..im pure 2stroke lover from malaysia..wish u always good sir

mad props for designing your own engine from scratch!

So stoked to see it fire up!

When all most all of your subscribers watch your video within the day it came out. You know your on to something. Keep it up. Love from New Zealand.

Good job man

Congratulations, what a huge milestone!

Fascinating engine design!

Your videos are awesome, it takes a lot of time to do the machine work your doing + set up video production for RU-vid. Props sir props

awesome man

Great summary, very exciting.

You're really taking this technology up a notch. Good on you bro, you're a genius and an asset to humanity

WAY TO GO MAN!! it sounds fucking incredible❤❤

Congratulations!

Great job 👍👍

Häftigt, drömmen är att själv bygga ett ”monster”. Bra jobbat

Nice work lad.

Every day is a school day with you. Your my number 1 Tuber.

Foocking awesome!!!

Well after a long time waiting and watching many of your videos the beast is finaly woken, grets from sweden, and that case föow design is brutal😍

did you see that flames, oh my god it looks dope, i was waiting for this video for ages

When the pipe starts shooting flames at 5:48 dis gon b gud

I've been watching so long, I was super excited to hear to fire up (even if you indicate its running funny) Grats on its' first fire balls!

Congratulations. Looking forward to see it at full noise.

I started watching your vids from the start and studying at the same time I’ve learnt I believe all there is to no my current engine revs just over 16000 rpm and has 20.8 bhp and does 88 mph and is 70cc more power than a kx 80 at 18 bhp. Thanks dude you know it all. I only wish that I had this knowledge when I had my rgv 250 wow what power I could of got from that.

I think the biggest problem there is the cylinder. Because transfers have a very large cubic volume. The cubication of transfers cannot be to much greater than the total cc. All this together with a very large crankcase causes little fuel air mixture to pass into the combustion chamber. This leads to the piston having to pump more to send the correct amount for a good compression. Try to block the 2 big transfers and leave only the small ones. Best regards, continues with the development of the project.

Got tears in my eyes when the monster started waking up here!! Amazing job. Gratulerer.

Hi Use cyanoacrylate glue to connect rubber seals and o-rings et. for head

in my karting days facing the motoplat ignition the motor turned anticlockwise i guess you have this right? A second stage throttle plate on the injector port may not be a sin , even a tuning advantage you have been thru alot of carbs, i like easy starts and smooth running reciprocation , keep at it .

Hello from France! I love your vidéos 😍

Congratulations on finally getting the motor going. Even without getting to your final desired result yet you deserve to be so proud.

This shit is awesome man,cant wait for success! You already reached so many goals

I have long wanted a Quattrini small frame racing engine for a Vespa which are insanely powerful 2 strokes and a darling of the German scooter scene. Their cylinders look somewhat like yours on the water cooled ones. I have in my large frame MK1 Vespa T5, an LML Xpress engine bought direct from India which has a power output equalling the Vespa P200 engine but also some grunt as it was designed to propel LML scooter and 2 adults and children around the streets of India and is an awesome hillclimber. Its not just the reed valve and slightly bigger carb that aids the power but LML's "half brick" heavy duty coil and a modernised CDi unit that creates a much brighter spark than a standard Ducati etc from Vespa's. OK I thrash out at 75mph but I get there bloody quick and I could by changing teeth on primary's give me quicker accel/less top end or slow accel/higher top end which is the beauty of them engines :)

Really nice sir👍🏻👍🏻👍🏻

YES!!!!! Been waiting for it to fire! Finally, there is hope

about the hardchrome coating in the cylinder , sumting i seen done on kreidler breitwand cilinders that is grooved beyond repair they bored out the cilinder and got a good cilinder from a older forced aircooled kreidler , these have realy small ports and not too big ribs , they chuck that cilinder in a lathe and wittle it down untill just the cilinder is left with about 4mm wall thickness , then they open up the ports to fit the breitwand and press that cilinder in the breitwand cilinder , mahle cilinders are about the best cilinders when it comes to the hardchrome coating

That's some precision machining there

>Revised< The ring material should be ductile iron. The face of the ring should have a slight radius, or about a 3.00 inch radius or 72.6mm. also the face of the ring should have shallow groove about .005 of an inch or 0.127mm x .030 of an inch or 0.762mm wide in order to spray a plasma coating The plasma is created by spraying an alloyed powder containing Chromium, Molybdenum, and Nickel into the groove The plasma molly application produces a somewhat porous yet hard, wear-resistant surface that retains oil and improves lubrication while also reducing friction the ring thickness should be about .040 inches or 1mm. There should be a small chamfer about .015 of an inch or .381mm on the top face inside corner towards the piston the bottom face towards the piston just break the edge. The top and bottom faces should be very flat and with a very good finish lapping would be a good way to achieve this. The piston ring land should also have a very flat upper and lower land with a very good finish, and should be machined with very sharp high rake carbide tooling. Clearance between the land and the ring should be between .0015 and .002 of an inch or .0381/.0508mm. the radial piston to ring clearance should be between .010 to .014 of an inch or .2540/.3556mm these clearances cause the ring to trap combustion gases behind the ring to force it outward against the cylinder wall for better sealing. the ring should be able to move freely in the ring groove with no binding or sticky spots. The ring end gap should be .001 inch per inch of bore size or .0254mm per 25.4mm. the ring should be machined such that outward radial force is enough to keep the ring in contact with the cylinder bore a way to measure this rig up a pull scale a small round thin plate slightly smaller than the bore with a hole dead center run a string up through the plate and attach it to the scale as to pull the ring up through the bore take note of the scale reading it should be about a ¼ pound or 113 grams. All the features of the above described ring are all extremely important in order to seal to the piston and bore if any are over looked the ring will fail to seal in very short order the plasma molly is the only thing you could do without and still make out okay, it just won’t last as long. One last thing you’ll need to bridge the exhaust port so as to not snag the ring. Hope this helps good luck