FIRST START! Rotrex Supercharged 50cc Two Stroke

[@2STROKESTUFFING]

Thanks for watching! Yes, that red sealant probably clogged the valve, and yes an o-ring would work better. But there's no room for the groove. Thin gasket should work though. First thing Monday I'll attempt starting it with the valve shut, and keep from touching it. If you find it difficult to wait until next week, imagine how I feel! Anyways, again, thanks for watching!

[@groenevinger3893]

"If you find it difficult to wait until next week, imagine how I feel" You crazy dude 😆 Hope to see the results soon.. 😁

[@billclark5943]

You've done slitting/sawing more than a couple times. Consider getting a 100mm diameter round saw and arbor for your mill

[@americanmechanic909]

Do you think ultra black permatex would work? It is maximum oil resistance, I use it where gasoline is present. Hondabond is a really good sealant also, but it will be a pain to separate.

[@markthompson9914]

Thank you for the graft u put into giving us petrol heads the fix we crave 😂✌️🇬🇧

[@BrawlerTheSmokyDutchMan]

Good to see the progress, I love the complication and thought process you go through, really enjoyed as always. You seem to be spending more time on completing youtube analytics, woohoo marketing baby ;) Some good keywords could be"(Just copy paste this and it works)": 50cc,50cc 2 stroke,supercharged 50cc,supercharged moped,supercharged scooter,supercharged 50cc first start And the trick is to add a (paragraph) just write a little text where you incorporate all the keywords, then all the links of sponsors and such, as you already have. If you have any questions, please do ask. If you are interested in me writing you one of those paragraphs to test out, I would gladly. (For free) Sorry if I am annoying

[@NSUGS]

That's amazing Mitutoyo stepped up like that. I used to work in a metrology lab, Mitutoyo quickly became my favourite measurement brand. Their products are worth every penny and rarely go out of whack, just don't drop them or leave coolant/cutting fluid on them!

[@dirtboy896]

Starrett isn’t half bad either

[@roundtuitracingaz132]

You're right, you're not worthy of those tools. Send them to me. 😁

[@adrianzmajla4844]

@@roundtuitracingaz132 me me me! Mitotuyo is the best in the biz.

[@threadtapwhisperer5136]

Came here to confirm Mitutoyo and Starrett are the bees knees. I tend to keep my Mitutoyos near the machines/coolant as they are only for reference and I dont wanna ruin my Starrets. Starret has some great customer service. We tend to send out Micrometers and whatnot in every 6months. The Mitutoyos are just dial calipers, I keep them as clean as a active machining area can be. They certainly last far longer than the Hazard Frought dial calipers. I need some calipers that have some sort of cover or snapon grit intrusion barrier. Every single caliper ends up dying due to eventual build up of schmoo inside the thumbwheel/track/actual dial mechanism. Sooner or later either the tiny tiny gears wear enough to become less accurate than guessing. If There's a trick to disassembling dial calipers to solve this issue, i certainly havent found it. Every time i have attemtped taking a caliper apart for cleaning the gear track and gear inside the dial dont end up aligned properly. So there ya go, long answer for I concur, my good lads and lassies. Starret and Mitutoyo for the calibrated Eye-crometer indicator consistency. Hah!

[@sfeather7088]

Your Patience , Persistence , and Positive Attitude are Truly Inspiring ! You are doing an AMAZING thing! Absolutely my favorite Channel :)

[@groenevinger3893]

this guy is working on this engine for a couple years now, its very complex and step by step he will get to perfection for this engine.. i enjoyed the journey for so far!

[@afflickracing1705]

Def Patience

[@White.Elemant]

@@groenevinger3893 or will he? I'm not so sure anymore. There's less and less of running the actual engine in these videos. As far as production goes, each one of these episodes is very well made, but still I'm losing interest. There's no pleasing everyone for sure.

[@geemy9675]

@@White.Elemant I've come to the channnel recently and it's very hard to find the actual results on the supercharged 2 strokes. I'm interested in the whole journey but that's a lot of content, and I'd like to see results first, there's so many videos and some of the clickbait titles don't make it easy to understand what it's really about. the dyno seems sketchy but It seems until now surpercharger hasn't significantly increased power compared to non supercharged engine. also power seems around 20hp with supercharger and/or nitro which is also about what best aftermarket 50cc cylinders are doing on regular gas so not sure any record is broken there?

[@White.Elemant]

@@geemy9675 blown 2-strokes are nothing new, check out Jumo 205 and Detroit Diesel 2-stokes. It may very well be, that the scale applied here is the actual problem with the setup. I hope this will work out.

[@andrewwasson6153]

That was a huge amount of development this week and well worth the wait. Looking forward to next week’s developments!

[@lemmehaveone]

I feel like I take for granted that you always quickly accept your mistakes & setbacks and keep on trucking, when that quality is actually so special. You're a thoroughly impressive human. Keep going! You got this!! Cheers from the West Coast of Canada :)

[@dukie1616]

Been watching this engine development build since conception and never tire of all the iterations. In fact it’s a part of this channel that makes it so interesting to watch. Also pretty sure I’m addicted to the roller coaster ride of setbacks, successes, hurtles and triumphs! Trials and tribulations, I’m in it for the long-haul. Keep up the great work👏 Can’t wait until the next video.

[@azertyytreza8947]

Man I’m so jealous of your Mitutoyo drawer! 😍

[@isickofit]

What great sponsors! Beautiful tools for accurate measurements.

[@samurboi8007]

Best part of my day right here!

[@tomkalleske3475]

This was just what I needed. Hungover after my band played last night, trying to sweat it off working on my own two stroke projects but needed to sit down for a while and relax. Thanks for another great video from Adelaide, South Australia.

[@ferrumignis]

Single phase induction motors generally have very low starting torque. DC and universal motors (e.g. as used in a corded drill) provide the highest torque at zero RPM so are much more suitable for engine starting.

[@nerd1000ify]

Cap start motors can produce high starting torque (they effectively synthesise another phase)

[@ferrumignis]

@@nerd1000ify Even capacitor start motors aren't great for starting torque, why do you think compressors have unloader valves?

[@nerd1000ify]

@@ferrumignis I was under the impression that a standard single phase cap start induction motor has quite a bit more starting torque than it has running torque at design speed? Obviously some loads demand a lot more torque on startup than they do running. I've never seen a single phase air compressor with an unloading valve. But this may be because I've only ever dealt with small ones. Most big loads are 3 phase which of course require no starting capacitor (though star-delta starters are a thing).

[@ferrumignis]

@@nerd1000ify A capacitor start motor has a lot more starting torque than a basic induction motor, but it's peak torque is typically around 50-60% of it's synchronous speed.

[@nerd1000ify]

@@ferrumignis they normally run a lot closer to synchronous speed though. E.g. a 2 pole motor on 50 Hz power runs at 2800 rpm or so, when the synchronous speed would be 3000.

[@sstocker31]

I'd love to see a map of all your followers around the world....gearheads uniting for the final push towards success!

[@carbonconnection2480]

*Mitutoyo hooked you all the way up brother!! Good for you man!!!* 🙏🏼🙏🏼🙏🏼

[@Iggy900ss]

You might be the maddest lad of all the madlads I have ever seen.... Can't wait to see and hear how it runs! Keep it up!

[@matolies]

Got to say as an engineer, I really do like Mitutoyo products also. Kudos for them to support your effort. Keep on going!

[@amcj10]

This guy's knowledge and engineering skills far out weigh mine 100 to 1, but it's still comforting to see he makes the same mistakes I make, like putting the pulley on the wrong way, I like him even more as he left that bit in, when he didn't have too... Top lad...

[@brannon1221]

Always excited to see a new video drop. Love watching this thing come together.

[@scottcates]

This is a very interesting introduction to forced induction, in general and not just for two-stroke piston engines. I probably won't ever build something this complex but the knowledge being shared here is very much appreciated.

[@kenkennedy5516]

Well done mitutoyo, your support here has been noted and may influence my future buying recommendations…………this guy deserves all the assistance he receives……..now if only a whisky company and cigar supplier would step up…..the possibility’s are endless 🚀👍🏴󠁧󠁢󠁳󠁣󠁴󠁿

[@donb3882]

Without a doubt my favourite KZbin channel.

[@WireWeHere]

Your AC single phase motor as a starter motor can be helped along with a loose belt clutching idler pulley like the ones used on some power hammers. The motor is brought up to speed without load and then the clutching/tension pulley is manually applied gradually. Just a thought from making due with what we acquired.

[@dennisford2000]

Motor was toast. Had no torque. Might have needed a new cap, or maybe it’s a three phase not wired correctly.

[@glloyd1987]

You’re one sharp person. The thing you did with the hacksaw at the beginning was brilliant.

[@jesperwall839]

If someone is worthy of those tools, it’s definitely you!

[@rajatsawarkar]

being an IT Engineer, i never thought i could understand mechanics but you are making it simper kudos

[@muratdil1798]

Cable ties : Check Rusty bits and pieces : Check Wood : Check Plastics : Check Hammering : Check Hydraulic press : Check CNC Milling : Check Turning : Check Mistakes and forgetting stuff: Check Artisanship completed. You have got a new subscriber.

[@backyardrestorations]

I just bought a lectron carb for my 50cc. 30mm in size! It’s a healthy bike.

[@pieterbarneveld9518]

In a sad kind of away I Hope that the engine never runs properly and that you continue this adventure for years to come. I enjoy your work so much and it inspires me with my mad projects

[@dommoss4264]

You can’t beat a bit of stuffing on a Sunday morning.

[@Max_Marz]

the 12" coolant proof is my favorite caliper ever made. Smooth as glass after breaking in for a couple months. the ridgidity of the bar and the tightness of fit makes the jaws feel *so* good.

[@flickermedead1416]

Thank you for all the great content. 😁

[@rossmacintosh5652]

Indeed! "Next time" will be the greatest!

[@fixyourautomobile]

Mitutoyo is the real champion here. Been using them for many years.

[@s1lv3rbordeaux47]

As an occasional watcher of your channel, I can assure you your amazing dedication over any and all obstacles is mind blowingly impressive to behold. Indeed you do deserve and are more than assured to warrant such fine tools. Inspiring you are, you better believe it. Thanx for all your work. Andy, Nelson, New Zealand.

[@TheSpacePub]

Add a house a/c fan capacitor to the motor for more startup torque. Ac motors dont have much and are inefficient until operational speeds

[@MrTJP777]

22:40 It may not be your day... But I'm grateful for the honesty in your mistakes. I keep coming back because of your acceptance of mistakes and the ability to move on. Best parts of KZbin is learning

[@markdoyle9642]

There is Always a Balance....You can see it as you Swing By (smile). Respect for your Perseverance, You Will Win, It will only take Time.

[@seabeepirate]

You probably don’t talk down to your friends when they make mistakes, don’t do it to yourself. It’s a difficult practice for sure but worth while. My thought process on the supercharger was to spin it faster and meter a blowoff valve ducted back to the intake. I guess I went the opposite direction with it.

[@2STROKESTUFFING]

Luckily I know I'm joking😁 I would spin it faster, but there's not much leeway until it will spin past its max rpm(15900) at high engine speed.

[@wags9777]

Why do I fell like evertime there is a success, everything gets changed and we have to wait until the next video to see if it works. Or just watch parts get made

[@alexchernish9974]

Alex I've been watching your channel for a while now and I want to thank you for putting every bit of content especially your mistakes I watch very closely but I would never have known you screwed up thank you for being honest that's the reason I watch your Channel

[@ramazan0124]

Hell FKIN YEAH A 27 MINUTE VIDEO!!!! THIS IS A AMAZING FRIDAY NOW

[@GonzoDonzo]

Im in the US and towards the holidays stores will have sales on the ryobi kits and u can usually get a bunch of tools, two batteries and a charger for the same price as two batteries

[@JMB676]

I enjoy your channel but lately I gotta say, I'm very very interested in seeing you put ALL this stuff that you now have to make this motor run and to make power, to fit onto you land speed bike/moped/scooter. I'm just wondering if it will fit or how crazy will it be just to get it to fit. Whether it's weight or size I'm just curious to see it all worked out. Not being a Nancy I'm just actually curious about the layout you will need to use to hit your speeds and all. You have graduated to not just a novice in you garage, but now a PRO.... still in your garage but by far a PRO! Great job all around!

[@jimdale9187]

My concerns as well. The rolling chassis was designed and fabricated before Alex was modeling his parts in CAD. Also, it was built in a rush, as we decided to do Bonneville in June of 2019, and he built everything from scratch in less than 2 months in order to get it shipped to USA. We might build a CAD model from measurements of the existing chassis in order to fit everything. We need a larger fuel tank, dimensional mods to accommodate a taller rider, and a method to mount all of the systems so that they are not dangling into the airstream. Some of this will require the engine design to be close to its final configuration before proceeding. Alex, you are most amazing!

[@Doug791]

This is what happens when a highly talented bloke has no idea about what can't be done. Have the idea and do it , this is going to result in something astonishing. Loving the journey.

[@999benhonda]

my garage is full of ryobi tools. Getting sucked in isn't so bad. My ryobi impact guns have saved me lots of time and frustration. I did buy that same small fan though, and haven't used it nearly as often as I thought I would. Still, portable tools are always a good thing to have.

[@presstodelete1165]

At the opening I thought the engine was a few meters behind you, then you turn and touch it reminding me how small all the elements are.

[@lumotroph]

Have I died and gone to heaven? Since when has there been a channel with superb production quality (that colour grade!), machining, engines, and JAZZ!

[@2STROKESTUFFING]

😁 There's the occasional glass of Rum/whisky too, maybe even a cigar.

[@lumotroph]

So I see - just gonna back and watched ~40 of your videos in this 50cc series 🫠

[@Eluderatnight]

If it is a split phase motor it will have next to no starting torque. Thats why old lathes had clutches.

[@stevenhoman2253]

The Mitatoyo indicator set is wonderful and practical.

[@PetefromSouthOz]

Hi Alex, your persistence is amazing. As I said when you fitted this carb, and maybe I am wrong, but based on what I have found running 38mm Lectrons x 2 on a RGV250 engine in my Land Speed Bike, the bottom of the intake venturi has to have airflow across it to activate the metering rod to draw fuel out of the bowl. Also the central reducer is only going to "see" the mid range part of the metering rod profile at wide open throttle/WOT when it needs to "see" the WOT/richest section near the tip/end/bottom of the metering rod. What ever it is I hope you get it working.

[@2STROKESTUFFING]

Thanks! The carb insert is round at the exit, but transitions to a full height oval at the slide.

[@PetefromSouthOz]

@@2STROKESTUFFING Hi Alex I went back and watched that part of the vid again, I see what you've done. My mistake, I missed the front view and only saw the reducer on the engine side of the carb. apologies. Onward and Upward. Look forward to hearing it at WOT Cheers Pete

[@Rebar77_real]

Hell yea push start!

[@GREASEGARAGE]

i will 200% watch this tomorrow ❤ love your stuff 50 of your watch hours is just me two weeks ago😂, hope youtube is paying you well

[@cameronf1460]

A legend in the making

[@IrisPPG]

Love your round bar stock workholding solution 😀

[@2STROKESTUFFING]

😁👍

[@sylviabaird9238]

For the few seconds of starting you could use the drive belt as a clutch. Motor slides to tension the belt. Start the motor, run up to speed and then tension the belt to accelerate the engine. Once started release tension and Switch off motor

[@viktorandersson7819]

The goal is running the engine in the US for land speed records. That setup won't be very useful 😐

[@secondchancecycles248]

Your engineering hurts my head and I love it

[@buildsstuffoutofscrap]

I think that I build crazy stuff but you are totally insane!!😅 Well done!!👍🏻very enjoyable videos and a fun project to follow! Keep up your good work och kör så det ryker!👌🏻

[@wags9777]

It's nice having nice tools that are known to be accurate.

[@cuppie2112]

The starter is really trick just amazing

[@nj2352]

First off, you are Great, better than my words can express. Thank you for sharing all your mistakes and all your Triumphs.

[@knuddelwinzig498]

Congratulations! You skipped the Kickstarter and go straight to electric starter! As always a joy to watch and learn and laugh and drink and have slight depression with you! Cheers from Germany!

[@djc7039]

When dirt biking I used to complain that everything required modification. I had no idea

[@NinjaQuick]

You got it up and running, which is awesome, just having a SC on there hugely changes the way it runs, so getting a 2S started at all with that monumental of a change is wild. You need to greatly increase the flow rate for fuel vs what it was, and probably advance det timing quite a bit to give it a chance to burn off. 2S turbo running at all is really cool.

[@brentonk461]

I found when I use to start my nitro RC car, it was easiest to start by flooding the Engine, with the glow plug out, then wing it over till it stops spraying fuel out the plug hole. Then start the Engine, and it would generally fire straight away.

[@jaratt85]

I can almost promise you that part of what you are fighting is that pipe, it's not designed for forced induction, run a straight pipe and watch it idle and rev far freer.

[@drew2719]

awesome so close. and i see your in the zone such a good feeling

[@gregjohnson9978]

It is the DC current of the drill that has the large amperage off the hop for sure. If you had a DC motor and power supply your switchable starter motor with the 1 waay bearing is great as well.

[@theoriginalpauly]

Nice score with the Mitutoyo tools!

[@malcontender6319]

12:48 The best micrometer manufacturer sends you freebees to finish your build with - You got the touch.

[@worldrage619]

Your ingenuity and motivation just amaze me with this stuff. I could only ever dream of building my own custom engines, specifically rotary engines. But I’m not sure I could ever find myself learning all of the different skills involved. I just have way to many hobbies already and not enough time.

[@raymondo162]

1:50: you can cut those grooves using your lathe........ yeh.. yeh.... lock the headstock then fix the workpiece to it. make or buy an end-cut tool and fix it in your toolpost in line with the lathe bed. hand- or auto-feed the tool thru the job, using the cross-slide to deepen the cuts each pass - it's like using the lathe as a shaping machine.............chief petty officer Opie, engine-room artificer in the British Royal navy taught me that.

[@600wheel]

Your idea with the self adjusting pulley is kind of genius for getting more boosted down low on your car but not blowing the motor when you’re running 94 octane gas I wish I had a missed that part of the video because now I want to try it on my car. I don’t know if anybody’s tried it before but I would have thought I would’ve heard of it by now if it was in any sort of production you might want to contact a car tuner and see what he says you might be able to get very rich very fast and I’m talking about money not air fuel😂

[@nerd1000ify]

Variable supercharger drives have been around since the 1930s, they were very commonly used on aircraft superchargers. The reason aircraft used them was to compensate for thinner air at high altitude, basically if you geared the supercharger for max power at 6 km altitude it would overboost at ground level. Aircraft at the time put the throttle body upstream of the supercharger, so they could prevent overboosting by throttling back, but doing that saps lots of power sucking air past a mostly closed throttle. The most common method (seen on most Allied engines) was a 2-speed gearbox between the engine and the supercharger. At low altitude the engine would use low gear. As the aircraft climbed a barometer would measure the outside air pressure, once the pressure was low enough a clutch was triggered to engage the higher gear. This was combined with a automatic throttle limiter to prevent overboost below the rated altitude of each gear. Some German engines instead used a hydraulic coupling with a variable restriction in its oil feed, at low altitude the restriction was mostly closed (starving the coupling of oil and causing it to slip) as the aircraft climbed the restriction was gradually opened based on air pressure, giving a continuously variable supercharger ratio that automatically matched the aircraft's altitude. This had the advantage of avoiding the 'dead spots' where neither gear was optimal that were encountered in the 2-speed design, but was a little less robust (they had some issues with the coupling overheating and sludging up the oil).

[@juanfranpd3173]

When the brute force engine was just an idea, I thought about that problem. Hope it works!

[@mimimimi9679]

thanks for your work it 's like to be with you in your workshop and being a witness of the history of motorcycle .There are always pionners you are one of those men .

[@Dumbo3.1428]

You could have made a Y piece for your drill to go into two opposite sides of the screws in the blower pulli

[@wags9777]

You are now a specialist.

[@cskalle1213]

15:46 that start up sound like a really expensive racing engine warming up for race!

[@Swinginspanners]

Always a good day when you post

[@lawrencefoster2120]

I watched a video on the Cossworth engine company and they have a one cylinder with 90 horsepower and 30,000 rpm. It's twenty years old.

[@harryjohnson2]

Been waiting all day for this!

[@damnthiccassboye7138]

Amazing , the variator setup for the turbo seems like a good idea

[@noelswedzinski4498]

All you need now is a nice big surface plate

[@600wheel]

I think you’re going to like that centrifuge blower you won’t get the same down low torque but your tuning might be a whole lot easier I have a Paxton supercharger on my Mustang and the parasitic loss is so much less but the charge is incredible once you get just a little bit into it I wouldn’t trade my Paxton for anything

[@iamaparanoidandroid1]

I've been here for a while, and I have mostly kept up having played with engines over the years (mostly 4t). This build has lost me and don't mean this in a bad way, I simply can't keep up with your brilliance, which has gone from 'sheddist' to 'race team designer' so fast. Well done Alex.

[@bullrush1725]

Truely EPIC... I'm not sure that even Honda, Yamaha or Suzuki have put this much effort into creating a two stoke 🙂 Awesome out of the box thinking. Keep cranking dude... btw totally jealous on the Mitutoyo draw of goodies!

[@AKAtheA]

specifically Suzuki just blatantly stole DKW's 2-stroke research :P

[@VyantQuijt]

But Suzuki did make a square 3, 17ish gear, 50cc racebike, if I'm not mistaken.... And thats absolutely bonkers whichever way you put it

[@ACE-xr4jz]

Awesome Jazz ,awesome Content!dude is completely Genius, near to Nutz ,likes Whisky while wrenchning… i Love it

[@LeObsidianCraft]

Best way to spend my lunch break!

[@markthurland1578]

The guy that developed Lectron carburettors also designed the very similar Magnum carburettors. I didn't see any use of the cold start knob (choke) in the video & the Magnum ALWAYS required choke to start even a hot engine. The Magnum utilises air correction jets from a Mikuni though I'm unsure of the Lectron......I hope the starting problem is as simple as something like that. Fingers crossed!

[@TekamsTheOne]

Awesome that mitutoyo is sponsoring now!

[@nickraschke4737]

Man. You’re awesome. Best channel ever.

[@DougsterWolverineGarage]

Mutitoyo is good quality stuff! I like Starrett and Brown + Sharpe also!

[@szymont1918]

The "Jævla idiot" at 1:14 lol

[@DgtalBreakz]

I believe you should try speeduino and go full EFI with it. Carbs seem a bit too inconsistent with boosted aplications in my opinion.

[@malcrandall1309]

Having watched a lot of Alex's back catalogue I seem to recall he was given a fuel injection system from a viewer some time ago. I must admit to being old school and carbs through and through. Not a fan of 2 stroke supercharging though. The crankcases Alex is using was designed for his resonant induction system which have a massive volume of 390cc which IMO is the cause of poor starting.

[@OddsandEndsMachining]

You definitely would benefit from some v blocks for the mill and potentially a set of broaches for making keyways

[@Valjettnamn]

incredible work ! maybe you already knows this.. do you have a start capacitor attached to the electrical engine ?? That will bring loads of more power startingpower to that motor. the electric motor acts just as your engine. it need revs to "align" with the incoming phases to get into the powerband. the start capacitor will give it that extra push. you will basically need if i remeber correct 50uf per kw. if you have a air compressor you can take a look they usually have that kind of setup. to get started.

[@geoffhiggins1886]

Not sure if you're aware of left drilling drill bits, there fantastic for getting out broken studs, you're drive and persistence totally amazes me, bought the t-shirt and coffee mug, its not much but something. Cheers Geoff

[@scorchpowdispenser]

Have you considered the concept of a boost accumulator? Would solve the airflow issues caused by the difference between the centrifugal and the roots type blowers.

[@ajpegfile]

ahahaha that contraption you made to connect your drill to the starter motor, genius

[@teterouge1472]

Man I love your vids, your attitude, your musical choices.... My No1 on KZbin... Y'all take care now All the best to you and yours from North Nottinghamshire UK

[@Grooty79]

So close, should maybe start the engine with no boost tube and get it running na first, then get the boost tube on, would be so much easier going back to the efi idea

[@austinconklin08]

I wonder if something like the SkiDoo/SeaDoo RAVE valve system would work well for this. It's basically a crank vacuum/pressure controlled guillotine valve in the exhaust outlet to control exhaust flow from the cylinder. More rpm, the more the valve opens to increase flow from the head/cylinder, creating a better mixture/throttle response at lower rpm for more consistent power.

[@zainoelsoroto2776]

One man and one machine. What will the outcome be in the next episode of 2STROKE STUFFING