A "completely normal" two stroke engine.

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[@isickofit]

The musical score.. the editing.. the colour balance.. AND an engine? Top stuff.

[@fatidiotjeff]

Alex, I think something you need to get some real credit for are both your camera and editing skills. Really superb. And as viewers we just don't notice either as it's all so seamless and smooth. We can concentrate on the content. But the amount of time and effort you put into each video is really amazing. Thanks!

[@2STROKESTUFFING]

Thanks man!

[@liamharvey9205]

watch for the 2 stroke but dude your video quality is just up there! the music, the timing, the sound quality etc.. cant get enough!

[@ThePaulv12]

Look in his vids as he did a vid (or 2) on his vids.

[@2STROKESTUFFING]

Thanks!

[@IFRYRCE]

My lord and savior hath uploaded again, praise be.

[@tigererickson8375]

Careful who you follow, and where.

[@warviking7647]

Haleluja!

[@ericvonhough4317]

Praise the Sun!

[@jake7503]

Blessed be the fruit

[@shanemandoh]

For real. I’m so tired of watching Let’s Go Brandon BS.

[@jesperwall839]

It would be fun to see a list of all the skills you have learned since you decided to start this journey. I guess it’s more than you would guess 👍😀

[@Jonas_Aa]

I will start the list. 1. Patience 2.

[@malcrandall1309]

By gum Alex, It's nice to have you back again! I've just had my 2strokestuffing fix for the week!

[@markthompson9914]

Yeah I know how u feel mate 😂👍✌️🇬🇧

[@jimmymcjimjim5610]

Ive been checking multiples times per days for two weeks for a new episode. Not sure why i like this so much but the rest of the world is missing out thats for sure

[@andybobandy641]

It's good to have you back, man. Boy your content needs to be longer. Don't be afraid to go 45 minutes or an hour, man. I would listen to you all day long.

[@-Doom-Strike-One]

After a day's normal mechanics, it's nice to come back home to watch this madness. Great video. Starting to get a project Binky vibe to it. 😉

[@slartibartfast2649]

Crikey, what even are you? Engineer, Physicist, machinist, cinematographer. What a résumé!

[@davidcoates4852]

Glad you enjoyed your visit to my home town. Other foods are available but they don't taste as good.

[@shroomskunk]

Create a warm up cycle for your mill. 3-4 minutes each of incrementally increasing spindle rpm while the bed cycles the X and Y axis travel. We used it for machines that had been sat for a day or so.

[@RZVPeter]

It’s good to hear you were treating well by my fellow scotts. I’m loving the Scottish theme in the music.

[@Spiro20004]

as an unsociable engineer myself if find most people of expertise are quite welcoming to sincere questions and interest in what they do. the concern of bothering/interrupting them was all in my head until i tried asking them. hope that helps you

[@rodriguezfranco3839]

I like this back to the basics vibe

[@autisgrinte9981]

Pls use this soundtrack more often, its so good!

[@omnicrutch]

It takes allot to step backwards, I think its a natural step in any new design to gain clarity, the best part is, whatever the outcome, its good, its a baseline, and a metric to measure by. Sincerely hope the next phase is full of answers! Cant wait to see the rest of the pieces fall back into place!

[@alexchernish9974]

Happy 2 see your videos up again

[@LA6NPA]

This is by far the most interesting motor/tinker channel on youtube! Can't wait for your next video!

[@2STROKESTUFFING]

Thanks man!

[@yzf250ryder]

for machining, its common to run a warm up routine before you start up for the day, would be worth programing a little loop to move all the axis to let run while you prep the cad and warm up the garage. keep up the good work!

[@_yeager]

My relaxing Friday after work activity, Two Stroke Stuffing.

[@malcrandall1309]

When Alex was turning the engine round at the start of the video it looks as though a start had being made on the new disc valve system. The circular recess on the right hand side was where the old ingnition stator mounting was previously.

[@jobertvangool9961]

Did anyone post “ Less is more” already? Glad to see you back, Alex!

[@WreckedRevival]

if your luck is anything like mine you'll find those old shims first thing getting into the shop after receiving the new ones. 🤣

[@Scissors69]

True that!

[@malcrandall1309]

Or it's when you find them in your pocket after they've being washed and gone rusty.

[@bradley3549]

Alex - I noticed that the two case halves could misalign when you only had a few bolts hand tight. I can't help but wonder if case misalignment may have had a role to play in your bearing demise. Have you considered adding dowel pins to the design for positive locating between case halves?

[@2STROKESTUFFING]

I should👍

[@mozer30]

I’m not a machinist, so how would it be possible to align the halves now that they are complete? How would you get correct dowel placement? Can you use the mill to find the exact position? Sorry for the questions 😂

[@AmirPomen]

Hope this improvement added into the case modification... Adding dowel to the case half bolt holes most likely not that hard to do with milling machine... 2 or 3 dowels should be sufficient...

[@bradley3549]

@@mozer30 Great question! I think in a perfect world, the two case halves would be machined with the dowels as part of the original design. And then the crank bores would be line honed with the case halves bolted together to ensure the crank has perfect alignment. That ship has obviously sailed. But that said, Alex should be able to get very precise alignment by setting up the case halves in the mill exactly like he did for the reed valve pocket milling operation. Probe or indicate the orientation against one of the flat case halves or known bolt hole locations and use crank bore as a zero reference (assuming that's what he did anyway.) Lots of good ways to reset a part back in the mill with high precision - whether a manual or CNC machine for that matter.

[@mozer30]

@@bradley3549 thank you for the explanation 👍

[@Skaadi89]

Another good morning cause it started out with a video from you keep it up

[@SeasideGarage]

Love the music.... Even more Loki with mopeds then ever! :)

[@chrishartley1210]

Your shim washers are with the 10mm sockets and ball point pens.

[@TheAndreasKL]

Yep. In another dimension, not known to man.

[@Nordmende01]

I like it so much when you building and trying new things. And I like the music between so much too.

[@dskofich]

Nice to see you go back to a much more basic design...sometimes simple is best

[@christophercastor6666]

Oh hell yes! No worries about consistency! Theoretically, it’s a wonderful thing to be filled with whiskey and food. Realistically it’s rough.

[@ramazan0124]

posting on my birthday made my day that mutch better :) love what you do, god speed

[@thedarkknight1971]

As far as your mods for different reed valve mounting holes and intake system, seems like you have encountered the same hurdles as 'AutoBeta2T' and his home modified Kawasaki AR50 - his project is to copy the target/achievement of making a classic AR50 do 100 MPH as was tried with a leading/well known Motorcycle magazine back in the day... 97cc head with custom port tuning, bigger valves, making his own tuned exhaust, upgraded (from standard 6v) 12v electrical system, ECU and tuning the timing with his own Dyno and all that to make the power necessary to get that bike to 'Do the tonne'... Both yours and his channels are intriguing to watch and are brilliant in your own respective aspects. I can't wait to see what you do with this little mighty motor and the bike you put it into for your end project goal!. Keep up the great work and I hope 2023 is a great and successful one for you fella! 👍 😎🇬🇧

[@rodrocket712]

Loving the music for this episode!

[@Bryan13402]

As always, I get excited to see another video. You always get me wanting to start another project.

[@thestreets5206]

Edinburgh is amazing city. Glad you enjoyed it as much as I did 👍👍

[@stephenfrancisvoros382]

Good one mate, good to see all is well.

[@michaelkafoure786]

I really enjoyed the music in this video. I am looking forward to seeing what the new engine can do for power. Hope it works out and forward progress is made. Keep up the great work. We all appreciate it.

[@iansmith8090]

Excellent tunes this week

[@gerardrusso9642]

I found your channel what a gem

[@Svangrem]

Äntligen musik som man kan höra på 😁👍

[@THatChevyguy91]

As a teenager I had a 06 cr125r. Got a summer job to pay for the bike and had some extra cash for upgrades. I wanted a pro circuit mide pipe and silencer. Then stumbled on the vfrose 3 reeds .bought it and man did it wake the bike up . Ahh the memories now I feel old lol

[@MrNursi]

Loved the Scottish reel music this week Alex 🙂

[@bradreed1395]

Have you thought about making a sacrificial bed for your mill? A slab of aluminium that you can tap holes into so that you can do the internal features of your component, bolt down through those holes into the bed and then machine the profile?

[@Jim-ic2of]

Glad you're back 😃.

[@randomname4726]

Great video, as always. I love the colour tone of your videos, along with the fantastic music choices.

[@jamesgnarkill3112]

Yes he has return!!!

[@lilithwastaken3564]

Thank you for the new video!!

[@michaelcruse7570]

You need to buy belt lines here,best thing I ever brought,saves filing

[@akajk2310]

We need more ppl like you in this world thanks teaching me boss

[@FattyTumTum]

I have been impatiently waiting for a video and it finally pops!

[@rotax700]

Good work as always Sir. This project fascinates me and I love watching you work out all the quirks. I've never clicked on a KZbin notification faster in my life.

[@WRCDMB]

Amazing, I Truly enjoy watching your Ingenuity and determination behind your projects 👏🏾

[@CriticoolHit]

Never be ashamed on not knowing something. Going out to learn like that is one of the most admirable things a person can do. The person who would deride or otherwise diminish you for being incorrect in the pursuit of knowledge is a bad person and not worth concerning yourself over.

[@mircomoschen8398]

I think it will be nice to see a flowguide to match the round boot with the square reed valve in this engine, I'm trying to make one for my ktm that also runs a Vf3... I've seen it on kart engines and it seems to be a huge benefit in performance!

[@denis-uo6ew]

Hâte de voir la différence bonne continuation

[@kasuraga]

My favorite way to start my morning ^^

[@csongorszoke4527]

Finally, i thinked i would go crazy waiting the new video, i checked youtube every hour, i am so exited for your videos!

[@imungyanuar6028]

Love to watch every your episode...make me full of idea, re-think and apply to my 2stroke vespa px 150. Thank you and keep think's out of the box...

[@barnesandrewj]

Every Hippie looses stuff bro! Not to worry 😜 Big fan. Love yr videos 👍

[@andyh.3105]

In a room of Stephen Hawkins and Einstein you may feel the " Idiot in the room" but otherwise I think you'd bring a huge amount to any convention. Kudo to you and your efforts. My most awaited video on youtube.

[@kevinchamberlain7928]

Hawkins? How did he interface with technology to write his stuffed-library full of books? Pray tell because I cannot find any evidence whatsoever? So, how did he do it? Or was he just a theoretical mouthpiece?

[@randomname4726]

@@kevinchamberlain7928 What on Earth are you on about?

[@reyalPRON]

Velkommen tilbake Alex :)

[@jaratt85]

Another thing I think you need to look at when it comes to using the pipe with methanol or nitromethane is the fact that when they burn they expand several times more than gasoline so you need the correct volume in the pipe to deal with that extra expansion/exhaust volume not just the increase in exhaust pressure caused by burning a denser air/fuel load under boost. The speed that they burn also needs to be taken into account to figure in the wave pulses.. I still think that under boost that pipe is just a restriction and is killing power, but I'm offering more beyond just that thought now.

[@peterridge5472]

Where have you been I've missed you

[@jrifda1]

Loving the tunes mate:) great to see good progress too

[@MrMadeinthe80s]

Haggis is a magical thing! That and pasties. Scottish food was so much better than typical British food other than fish and chips.

[@danielthompson3849]

Definitely think you need to print a stuffer for the other inlet 👌 Bigger Reeds should work better with the blower than rotory with the timing being dynamic 👌

[@ericschumacher5189]

The area under the exhaust side of the cylinder could get a stuffer without restricting the primary intake path…..in the square edge of the bottom of the cylinder resides there currently……if this could get the CCR up to 1.2:1 or greater then the reeds would probably work really well…..also if you end up keeping the reed design for the CR85, then V-force now makes a 4R reed cage that has more bias between the stiffness of the inner vs. outer petals, it may help too with a larger crankcase volume…. Keep up the good work; already excited for the next video 👍🏁👍🏁👍🏁

[@2STROKESTUFFING]

👍Was just thinking about that area myself 😁

[@keithpeterson6108]

@2STROKE STUFFING I squawking for tighter cases for awhile. Glad you did it my friend. Tgat area mentioned above should be addressed. 👍

[@michaelfackler9716]

Love your show, my friends dad used to do performance port work on 2 cycles, it was so fascinating to watch , I have an idea you might try since you have cnc , try to incorporate fins (like turbo cold side) on the outside of the crankshaft counterweights and a sort of port near center axis of crank , and channeled to side ports of cylinder, it would be two port channels to the carb , in my mind it functions , what do you think , it would reduce excess drag from supercharger , its hard to describe but generally both sides of crank would be a turbo , or instead of fins have a progressive pitch on crank weight (like a snail shell ) that induces a pulse to the transfer port, keep up the good work

[@tomengman]

Hah, my friend used to work at Captains, great little bar! And yes, the whisky diet comes with a few drawbacks.. Worth it though!

[@kingcosworth2643]

You really need to look at the area of your exhaust port

[@malcrandall1309]

I feel that the raised floor of the exhaust port will cause problems at high RPM. What I can understand from what Alex has said over the years the floor of the exhaust port is level with the top of the transfers. This will help reduce fresh mixture going out of the exhaust port at low revs which is no interest to us as were only really bothered from 16k upwards. Remember the old adage, you have to get it out quicker than you put it in. Emissions are of no interest to us at this moment. I genuinley believe the exhaust port floor should be level or slightly below the piston crown at BDC. The A port is very close to the exhaust port leaving little wiggle room with this design. We must remember the exhaust bridge was welded in after casting/printing. If you look in Alex's back catalogue under " Nitro EFI,metal 3D print cylinder with ludicrous porting" from 25th February 2021 it clearly shows the raised exhaust port floor.

[@shanepowers7566]

Shane and Helen say ‘Hello’, from Oklahoma.

[@2STROKESTUFFING]

Hello Shane and Helen!

[@erikbergstrom258]

holy shit did not expect the captains bar i used to be a regular😮

[@stevenhoman2253]

Wonderful, Alex, prove to yourself that a 2T engine can run and work, first. Then introduce changes and examine the results. One step at a time. What improves or degrades performance.

[@MrSagerific95]

It’s so baffling to me that you sincerely believe you have advice for him. He is constantly breaking new ground and in doing so is giving so much hidden knowledge to the 2 stroke community. Humble yourself dude. He’s miles ahead of you.

[@ericschumacher5189]

Look up who Fritz Overmars and Jan Thiel are, then look at the consortium of work they’ve graciously posed on there work on the Aprilia RSA & RSW 125cc Moto-GP engine…..they frequent the Kiwi-biker forum (see “ESE tuner thread”, it’s like 3000-pages of tech from people at the pointy end of the spear if two stroke Development before it died in 2007…..Alex even posts there from time to time……everyone can still learn something and to be a master of any discipline you first have to be a student of it for basically your whole life…….what Alex is doing is trying to break new ground, so any good ideas should be welcomed, 2-stroke N/A development has been pretty tapped out since the early 2000’s.

[@malcrandall1309]

@@MrSagerific95 I'm not being disrespectful to Alex in any way, but your talking cobblers.

[@IanB22]

yeahssss!!!! new Episode!!

[@zzyzx0069]

Yo why is it every time this guy posts a video I watch it as soon as I see it? Like I'm not even into 2 stroke engines or anything? And you need to tell your editor they are fucking fire at their job! Shits mint

[@evilelf5967]

if you have time take a look at his previous uploads,amazing to think of all the things he has taught himself.4 years i think i have been watching.

[@bend1483]

He edits his videos himself as far as I know. But I agree. Top work.

[@2STROKESTUFFING]

Thanks! And yes, a one-man-show

[@2STROKESTUFFING]

Thanks!

[@daedalus6820]

Ok going back a few videos to the pulse jet engine accident thing I would bet what you had happening was the valves were opening to early and you were getting what's called hot blowing I don't remember you mentioning it but it was used in racing for awhile almost like anti lag. Hot blowing is the exhaust valves opening closer to the start of burn and you end up with fire out the exhaust

[@stewart4711]

lobe separation valve over lap open port blows right out the top

[@manitobaman5588]

You continue to impress. Are you familiar with Detroit Diesel two stroke engines? They use a super charger blowing air through crankcase and ports in cylinder together with mechanical exhaust valves. Just something to think about. Back to work now Alex!

[@shawnsatterlee6035]

A CR80 he said. Best yard monster ever made. Had many and yes! Maybe take a late 90's Honda 80 and reverse engineering it?

[@dirtkartracer]

Great progress mate with the new reed block modification. Check the vacuum cleaner bag for those crank shims. By any chance are you going to make a blocking plate for the other side of the crankcase that fills in the unnecessary space and to reduce crankcase volume even more?

[@JC-in5fl]

Hej Alex, brilliant video, as always! I wonder if you could find time to tell us what the music is that you play? It often feels like I would like to find more but without knowing the bands its hard to find. Would also give credit to the musicians.

[@Swinginspanners]

Love it. Love the music Love the work 😍

[@RYves-dd4ky]

Thank for you contents, why don't you reproduce a new 2 stroke mazda engine with cams, valves and separate 2stroke oil from fuel like a 4stroke ?

[@mikepescini4766]

Alex I was just reading an article. Company is called Benda. Chinese company. Just patent a super charge twin. Driven off the cam shaft. Just thought I'd pass on the info

[@JamesC213]

I started watching this after playing Sea of Thiefs and thoght it was still running in the backgroud with your music choice lmao.

[@2STROKESTUFFING]

😂

[@michaelmurphy2976]

I'm sorry your shim washers went off on a walkabout. I think they are having a party with my 10mm socket!

[@malcrandall1309]

I've lost around 20 main jets that are playing hide and seek. Just hope I haven't weighed them in!

[@cskalle1213]

4:04 yes those crabon fibers are pretty bad if the piston eats it. my brother said once

[@faroironandcustoms6577]

Nice!!! Looking forward to the next episode!!!

[@frankhenry645]

One year full time. I can see the improvement. Salt Lake 8 months from now 😆 🤣 😂 😹 😆

[@markthompson9914]

I read all these comments about what u should or shouldn’t do, and I’m sitting here thinking “what did he mean !?!?” 😂 It’s not stopped me from watching though, keep at it chap, you will finish eating that elephant ✌️❤️&🍀 from England 👍

[@jeremiascascioni8201]

You should take a look at the detroit diesel intake system style. It has intake valves like a 4t, because of that it can only work supercharged. I am sure that several problems that you have in the admission would go away

[@someidiot1984]

I enjoy the background music more on this video. But then again I am also a mick. Keep it up

[@brandancarlton-nichols1830]

Crank case volume, would it be possible to have liners that adjust volume for testing? Greetings from the UK

[@malcrandall1309]

Hopefully there will be a 3D printed pair made to sit over the crank fly wheels in the next episode.

[@426john]

Great ! thanks , what is normal ?

[@silvestree1]

So educational

[@rg3412]

The music is good!

[@ikebruckmann9564]

YOU MAY CONSIDER RUNNING METAL REEDS BECAUSE OF THE BOOST PRESSUER MAY CAUSE THE FIBER REEDS FAIL TO OFTEN.

[@MrSagerific95]

WHY ARE YOU YELLING AT US!!!

[@malcrandall1309]

I've asked a question here in the comments re reed valves, but no replies. What is the maximum operating frequency for a reed vavle to operate reliably. I believe old type 100cc kart engines revved to 20k but I've not managed to find any info on the type of reed valve. This information is purely for my enquiring mind.

[@davidgierke7582]

@@malcrandall1309 Without checking, Gordon P. Blair's book goes into great depth on the subject of reed valves. As an aside, I have tested reed-valve model airplane engines that ran in excess of 35 krpm.

[@malcrandall1309]

@@davidgierke7582 Thanks for your reply David. I've looked on the interwed and found no specific answers as I wanted some uptp date info. I would have thought the kart lads would have jumped on this one but no joy. I was thinking along the lines of a 250cc single reed valve used for road racing. I would love to build a A/C 6 speed single purely for nostalgia as this was the class I raced in, in the early 70's before going onto 125's and 250 twins. Alex should have no reliability issus at 20 k except for those nasty spurious oscillations that may crop up. PS, I realise a reed valve would be reliable for something revving to 12k ish. .

[@davidgierke7582]

@@malcrandall1309 Hey, Malc... I wish that Alex would go to the crankshaft rotary induction system and forget about the reed valve, especially since he is aiming for a peak bhp rpm that will get him the record on the salt. Also, his dyno should be set-up to record data at specific rpm to reflect this load point; who cares if the the engine spools-up smoothly to 20,000 +rpm, as long as it gets there? Simplify, simplify.

[@chilebike6556]

Buddy the only fix I found for continuos flood without flat out nozzle was a fuel filter downstream of the pump on the way to the nozzle. Endless sumps didn't do it.

[@fabriziotieghi9342]

Its too much fun with your videos! Thank you very much Sir! ;)