Rotary Valve PiP engine in RS50 Frame, First Start!

[@carbide1968]

you deserve the nobel peace prize for patience. respect sir.

[@brianhaygood183]

You aren't a hero for putting out a fire if you are also the arsonist who set it. Ha.

[@rixogtr]

He does have an incredible patience. It's mind blowing and inspiring at the same time.

[@mikeheath6516]

We all do!

[@lumotroph]

That’s the Nobel Patience Prize 🏆 I believe

[@carbide1968]

facts.@@brianhaygood183

[@glennfoster804]

We tried carbon valves at Garelli in 1983, on the 50 and 125cc engines. On track the rider did not notice any difference in vibrations. On the dyno I saw a little less power with the carbon discs. And there was a lot of wear on the crankcase and cover. So we decided to continue with steel discs which never gave any problems. At Aprilia carbon discs were used. I think smaltiriva was the firm that treated Aprilia crankcases and inlet covers.The cankcase and cover were coated, there was never any wear.Jan Thiel 15th nov 2012

[@andrewcammer2535]

The edit at 11:43 with the music was also killer. 10/10 production value!

[@keithpeterson6108]

Dude! I was gonna post this exact comment. Glad someone else thought that was a cool touch & worth mentioning. 👌

[@bandinda7206]

I will say the music choice for this video is incredible

[@andrefagerlid5352]

Do you remember that feeling when you got home for the weekend and a new episode of Friends, Seinfeld, House, or Fleksnes (Insert favourite series here) was dropped? Alex brought that feeling back for me in a world of greedy instant gratification, binge-watching decadence. As soon as the latest episode gets rolling I know the weekend has landed, thank you! I raise a glass of Plantation, Diplomatico and Bundaberg solera in your general direction. Happy weekend, happy happy joy joy!

[@Mrshotshell]

In my experience carbon fiber isn't very good at withstanding gasoline, oil, or friction. When the resin starts to break down from oil or gas exposure, especially on cut edges where it can wick into the middle, it expands. And as you found out when it wears it creates dust which is conductive and highly abrasive. I strongly suggest using stainless steel (416 easy to machine, wear resistant stainless would probably be ideal) or titanium for the rotary valve.

[@bend1483]

I was just going to leave this comment.

[@fredmitchel1236]

I like the idea of titanium....Light and strong.. It seems like the any rotary valve is going to cause an imbalance.. Titanium is a little tough to machine but quite doable .. Good suggestion

[@Mrshotshell]

​@@fredmitchel1236 If the valve ran at half crank speed it could have two cut outs directly opposite each other to balance the valve and reduce friction. It could be possible to use the offset weight of the crank speed valve to help balance the entire rotating assembly, like a balance shaft in a lot of inline 4 or v6 engines. But since changing the position of the valve to change the valve timing would throw the balancing off.

[@fredmitchel1236]

@Luaa definitely things to consider...and knocking or reducing crank vibration...and feeding an engine a good perfect charge The rotary valve or Reed or piston needs to open once every revolution... I guess I am confused about running at half shaft speed .... Now I thought about how to make a rotary valve not vibrate... It can also be balanced..at least statically.....and dynamically... Use some tungsten powder. Have holes filled I might send Alex a pound of 70% assay WO3 That my folks is some heavy stuff

[@Mrshotshell]

@@fredmitchel1236 ​ @fredmitchel1236 If the valve is running at half crank speed it would need two "ports" directly opposite of each other and half the size of the single port on the current crank speed valve.

[@matswallsten1628]

Hang in there. Two steps forward and one back, that’s how life seems to be 😉 Really enjoying following your thought process and how your working things out. We all believe in you and we are all learning in the process 👊

[@future-matze-35]

✊🏼

[@geemy9675]

more like two step forward two step back, or rather someone really drunk trying to find his car/hotel room

[@matswallsten1628]

@@geemy9675 why so negative? What have you been doing lately? 😉

[@elivestin5353]

Älskar hur du alltid lägger upp dina videos precis när helgen ska börja! Ser fram emot det lika mycket varje gång :) Trevlig helg på dig!

[@jp-jammapic]

I’ve got to ask the question. What’s the song through the first half of the video. It’s great!

[@matthewspeller]

Nothing easy is worth it! Keep pushing forward man, you're doing very cool work.

[@o4games489]

I'm missing the jazz this video, matches the vibe much better :) Keep up the good work! And glad to see you are wearing protection for the carbon dust

[@billjacobs8035]

Plus having to turn the volume up and down trying to block out the racket, uh i.mean music to hear him talk is a bummer

[@GonzoDonzo]

I like how he has an eclectic mix of music. Sometimes its not my thing either but thats ok

[@dazg258]

Choice of music this week was awesome..

[@aceventura1523]

ditch the carbon rotor, replace with stainless. brp wasted millions designing the rotary valve 787 for the seadoo, just to replace it with reeds.. id just dupe their setup if you really want to use that old tech. love your vids!

[@paradiselost9946]

personally, hes better going back to the blower and chasing the "diesel" style of doing things... seal the case, pump in some oil and forget about it.

[@Thefreakyfreek]

@@paradiselost9946 diezel power

[@bradley3549]

Really digging the music choices and synchronized video editing on this one. Your efforts have not gone unnoticed.

[@Nikhelin]

What was the first song? Tried to Shazam with no luck.

[@rainersnookh]

”Two weeks into this week” That’s the feeling I have most weeks.

[@nj2352]

Your interest, your wonderment. Its like watching a 4 year painting play itself out. Keep plugging away, its amazing to me. You are inspiring!

[@razor1uk610]

@2STROKE STUFFING I think when you tightened the crankcase half bolts without dowels (as you said), you minutely twisted the halves, leading to a thousandth of a degree misalignment, that led to poor sealing of the cylinder to the crankcase, causing the problems you had. While tightening each halve onto a massive plate is useful, if each bolt is not identically torqued down, then there can be an imbalance in the tensioned alignments of each half with respect to each other before they themselves are bolted together. ...ignoring any variances introduced into the crankcase from when the massive plate has its own bolts are not gradually un-tensioned/loosened then removed, causing a minute fraction of spring-back tension releasing passing back into the crankcase assembly without its dowels to help reduce the tolerancese/slack to just trusting the gap between the outer diameter of the case bolts and the diameter of crankcase bolt holes themselves.

[@alanburditt5724]

Been watching you for quite a long time now and just wanted to say how much you inspire me. Have a 1981 yamaha rd250lc and it's been driving me mad trying to get it running right. won't bore you with the details but was ready to give up and sell it. After seeing how persistent you are and never giving up I decided to keep going 💪I just wish you were here with me to advise. Keep up the great work 👍

[@raymondo162]

the problem is the crankshaft centre seal is fecked. incoming charge is pushed from one crankcase half to the other, and vice versa. somtimes if you can get the engine spinning fast enough it'll go (long, steep, downhill bumpstart). soon as revs drop it dies. crank centre seal 100%

[@alanburditt5724]

@@raymondo162 Interesting, you're not the first to tell me about crankshaft seals. I did change all seals on initial rebuild but ran like crap and turned out to be a carb issue. fixed this and ran well for over a 1000 miles. then started to be hard to start. then once running was OK. then was only running well on right cylinder, left cold. I was sure is was a carb issue again but wasn't. now I notice a very small leak on left crankcase (at front where crankcases meet). I'm gonna strip down, change crank seals and have a look at the crankcase joins. Thanks for advise 👍

[@netwt42oz]

Make sure the carbs are synchronized perfectly as well

[@alanburditt5724]

@@netwt42oz thanks for that. what do you mean exactly with carb sync? are we talking slide position or balancing? if so how should a I sync them? I saw a mercury pressure balancing kit but never used it. cheers

[@Invictus_Terminus]

Also just remember even after you get it running again, once you reach a certain rpm threshold its basically a reverse pulse jet with the fresh charge blowing right through into the exhaust before the back pressure wave pushes it back in. Personally I think your at that stage where most engineers rip their hair out trying to eek out that last few hundred rpm for more power. Agonizing and exhilarating at the same time to watch.

[@frankhenry645]

I think that's what you call passive aggressive 🤔

[@Invictus_Terminus]

@@frankhenry645 maybe just a little. Didn't mean to sound offensive.

[@funkinflugen]

20:23 Damn you man! You stuck this song in my head and I went on a mad search to find it (A holiday with me by Hollie Hammel). Haunting and ethereal, it plays in my mind as I doze off to sleep... Even though I am caught up with your most current video (02AUG23) welcome back, this is the best place for the song comment. Might I suggest Robert Pirsig's Zen & the art of motorcycle maintenance, he too fought demons (Phaedrus). You are not alone in the darkness...Thank you for sharing all your ups, downs and madness in search of your ultimate 2-stroke, I'm with you for the ride!

[@martinlundberg87]

Your video editing skillz have really become amazing, a true pleasure to watch

[@shyguy8426]

you really stepped it up this episode the music, the work and everything. I have been following you on both my accounts now for over 5 years now.

[@robertmckay694]

I don’t know how you keep going when life keeps kicking you in the taint but it’s inspiring!

[@Charlieman.]

What ever is going on over there - and it sounds like it's not easy - the garage is a good thing to have.... Stick with it. We're with you

[@frankhenry645]

Hey it's been awhile Remind me what was the mission? Speed trial on salt flats? How m--any years has it been? I sure miss those kids on that bus Maybe next year 😢

[@pimidzerda481]

Always cheers me up when you post a new vid.

[@vancemacd6315]

I worked on an R T 100 from the 90's. It had a rotary valve. It wouldnt run untill i got the gasket on the valve its swlf just right. And it ran flawlessly. I loved the rotary valve idea.

[@7eis]

The change in music feels like you've entered the final stretch of your project🎶🎸

[@omnicrutch]

😍 sweet respirator!! Edit: just got to the end of the video, i feel for u man, Im in and out of those shoes often, it breaks my heart to see it happen to somone else, steadfast and steady handed

[@williamvonroenn8063]

I know so very little about small two stroke engines, I find all of your videos very interesting. I watch them all.

[@kimkeam2094]

Can I suggest a way to dry out your filament with no distortion and perfect every time, a food dryer. I picked up a cheap one, removed the shelves that you put the food and placed the filament roll on instead. If you wish to do more than one I grabbed a sheet of clear polycarbonate and made a cylinder shape which increased the height between the base and lid. Now I can dry up to three rolls at a time. As they have a heated fan in them, it circulates the heat well giving an even drying out of the whole roll. Hope that helps

[@userpike]

I really dig the background music. Will you please post a list of the artists and song names, thanks.

[@thomaskemper9328]

Exactly! I made a career with Aprilia trials motorcycles. I used to make my own rotary valves for different riding conditions..

[@dukie1616]

Awesome work great content. Normally the sound track is a big part of this channel’s creativity.. That said some of this episode music was a bit nerve racking. Still my favorite Channel on KZbin!

[@robertekis2450]

You got the audio levels set well now. Thanks for these videos. I have learned a lot about 2 stroke engines (and fabrication) from them. I like your self deprecating humor and your persistence.

[@mistermacgray]

When I print CF nylon (same printer with appropriate upgrades) I use a dry box to force the moisture out of the filament but also print it while the box is on. I also print on glass, use glue stick and a brim, that filament isn't cheap by any means but it is worth it to me.

[@Jim-ic2of]

Ohh , only three days ago ? Hurray up please , I am holding my breath . Not only that I am holding the breath of several other people .😮

[@CM-xr9oq]

@2STROKESTUFFING can we get a song list for this video?

[@johny79action]

I realised today why I love this project and your content, deep down if I had the time, space and money I know I'd be doing the exact same thing as you. Thabkyou for bringing us all on this journey 😊

[@MsJon52]

you are due some good fortune for the effort you have made, hang on in there any day now things can change, good fortune to you.

[@IanB22]

You gotta love the t-shirt add at the VERY end....truly the greatest.

[@Hyprmtr]

I just had my first experience with a resonance engine you sometimes talk about. The crank seal blew out of my CR250 and it was reving to the moon. It was kinda scary for a second. :D

[@turkeyboyjh1]

Yep had the same thing on my 250 Honda Elsinore it would run off on its own completely randomly, It happened to me once in gear and I haven’t rode it since

[@dp-kr7js]

​@@turkeyboyjh1don't be scared of that. When its runs away, (if you dont have a killswitch) pull the clutch and gear up to the highest gear, then brake down to a stop and dump the clutch. When you're in highest gear and dump the clutch, it stalls and problem is solved with no danger in sight.

[@luckgrip252]

@@dp-kr7js The impact puts huge stress on the transmission components, but the transmissions are strong and can hold that small abuse, better deal with clutch change than get everything new for bottom-end and top-end which would cost a fortune. So I agree with you.

[@dp-kr7js]

@@luckgrip252 of course it puts huge stress on the engine, i believe anyone know that, at least if they think for 2sec. But its ALWAYS better to have a broken engine, than a run-a-away bike you can't control = possible death. Get the bike to stop at any cost before you pay with your life.

[@davidopitz972]

the music was SOOOO GOOD this episode i was dancing the whole time

[@paddy2661]

You know Alex this may sound unconventional and weird but hear it out . The setup i propose on INLET where reeds would normally be used a piston inlet which would replace reeds and rotary valve , have it like a rotating crank piston cylinder running off drive belt , inlet with side ports tapered down the tube/cylinder as the piston retracks port increases same theory as needle and jet. Once TDC on engine cylinder your inlet cylinder timing closed off same as rotary valve and better seal than reeds. In theory a Vtwin but 28mm inlet cylinder. Or research F1 engine valve they do not work from camshaft they work on engine cylinder pressure you could adopt same principle for inlet valve with no reeds no rotary valve but second option would be alot trickier . Cheers carbon will kill your engine

[@andydelarue9344]

Super glue is good for bonding your reed plate and gentle heat to breakout,also only a few solvents will work, so it might be good with your fancy fuels.

[@madestman101]

you do get a lot done in one week man!!

[@bobdog4379]

Top content, it's a roller coaster ride just watching the highs and lows.. stick at it kid you are nearly there.

[@Nine_One_Eight]

One of your best productions great editing and soundtrack, watched It in one sitting which is rare for me with any creator. Keep pushing you will get there.

[@jimtenbrummeler633]

Great background music, was watching the video while working on a school project!

[@michellatour150]

Put you case sealant in a 10ml syringe (no needle), with even pressure it makes mess-free perfect beads.

[@1234567890CAB]

I was thinking maybe you can try teflon/PTFE sheet for the rotary valve because it has one of the lowest coefficients of friction. I know ideally there shouldn't be any contact or rubbing, but some rubbing is going to be inevitable with pressure/vacuum on one side of the valve.

[@notavailable8227]

I enjoyed the shake up from the usual music. Always impeccable choice

[@truckericksdashcam]

oh the challenge of over coming the frustration . keep it up Alex , you will figure it out

[@lexeriw]

I really like all the vibe of this video, the music was perfect man.

[@siebevanwartum5831]

Duuude the music had me going like it's gonna happen baby! So close yet so far. Keep it going man. As many have said already, I salute your patience!

[@ColdNightmareHell]

For the 3d printing part I would try carbon fiber as a print sheet. Laminate from PCB`s without copper is great print surface too.

[@WinterFreshPHD]

I'm starting to think that this guy has no idea what he's doing. But I have to respect the fact that he keeps trying.

[@danijuggernaut]

You should see the water leak on your exhaust gases colour (white steam). Man, you began with nice funky music summer mooth....keep going.

[@MinhasA]

Can you list the music that you use on your video?

[@augusto630]

What happened to smooth jazz? Please never give up, you're my favorite channel :D

[@TotoGuy-Original]

sorry to see you having issues must be extremely frustrating after all the work you have put into this. hopefully it gets better

[@yousef_beta3a]

First time to watch a video from this channel and the videography and style just wowed me

[@williamgoodwin9667]

Love how you are all about showing the mistakes that’s what it’s all about. Thanks heaps for all the mins of vid you go through to make this. You really need a record for all the effort I wish you all the best of luck buddy keep up the great work. By the way I recon number 13 or 66 is the best bet for the numbers if that’s your caper.❤❤❤❤❤

[@crystaldragon141]

I love all your videos but the music and editing was banging in this one!

[@daveyjones-sx6ym]

Aah, the hardest struggle before a major success. Feel your pain man. After the rain comes the sun, good luck

[@paultrainer4560]

Awesome build! Maybe use a "start engine function" from back wheel built onto bench?

[@henryknox4511]

You can dry exposed filament out on a tray in your laundry dryer on medium (if you don't have a proper filament dryer), I do this before I print anything anymore- even with a fresh unopened roll.

[@henryknox4511]

Test a short piece in the dryer before throwing the roll in to make sure your dryer doesn't get too hot. PLA didn't melt in mine until I set it on high.

[@2STROKESTUFFING]

Excellent advice, thanks!

[@dustinh4175]

Hello from Washington State USA

[@gleddyvrudd]

While I was watching I was reminded about the old bikes from the 70's the FS1E yam the APSO etc, they must have had similar problems , they had a metal disc valve and inlaid fibre on the disk valve cover , it also reminded me of a worn one back in the day that was slightly tight and it wouldnt run exactly the same as this, tthe disk valve covers were made of steel I wonder if aluminium causes problems with expansion they did seem to be well reinforced with ribs too

[@peterbrown172]

Try hairspray on your 3D build plate. Helps bond & release.

[@FirstNameLastName-tp5bu]

What is the reason for selecting carbon fiber sheet for the rotary valve over say something like Delrin/acetal or PTFE/Teflon? Are they not rigid enough?

[@julianbascle8481]

I like the music choice

[@korsal4133]

A modern day Burt Munro, keep up the good work!

[@mainrig4981]

For better start cherry red heat with torch the end of the spark plug and put it fast in

[@terryatherton2881]

My day is looking up.

[@marlobreding7402]

It seems we are similar in one aspect that is weird problem seem to seek us out. Always informed employers at auto repair facilities that this was the case with me. They would laugh and later they would come back and say you're right.🇧🇻

[@dermopedschrauber2731]

Whats the song at the beginning?

[@ifanstarr]

Could you use an insulation resistance tester to check for plug fouling? Quite a common electricians tool, most go to 500-1000v. By the way, your machining is 👌

[@Goultek]

I built a race car once, was months of frustration until one day I hit gold and the engine ran like a charm

[@mtreis86]

I wonder if you could use a Tesla valve as an intake on a 2-stroke. It would have less restriction forward than a reed. No moving parts makes it simpler than the rotary valve.

[@acurarl9929]

Tesla valve don’t stop flow in reverse direction so no it will NOT wrk.

[@d.thorpe2046]

i really liked the quick edit @ 11:43. neato!

[@simonblackwell4273]

I feel your pain big man, maybe you need a stainless rotor just like on my old A100, that thing lasted decades

[@paradiselost9946]

a100, oh my that brings back memories... like someone stripping the plug and tapping it out to the next size up. we spent ages trying to track down an A series plug... wonder what happened to that cart? to be a teen again and have access to some of the stuff we had back then. dammit!

[@brentonk461ismylostaccount]

Pressure check cooling system. And for a first start run it with no water.

[@_..-.._..-.._]

By the time you’re done, you’ll have created a DOHC -four stroke- _two stroke_ 😂

[@robertpierce1981]

Digging the 80’s club music this week. Easy listening funk disco?

[@voraz9002]

bought your shirt a few days ago...think I'm gonna wear it tomorrow.

[@e.deruijter6902]

Great first song in this clip, what’s the name of the artist ?

[@T3ddyRuxp1n]

only 1 min in and its a banger!

[@mauldulated302]

Murphy has it out for you my friend. You got this!

[@GTE_Channel]

Great analysis to find the sparkplug shorting out, would have never thought of that.

[@justindastar]

this music is a vibe

[@goosenotmaverick1156]

I'm like 3 minutes in and couldn't agree more!

[@future-matze-35]

I also like the music, but I think it totaly doesn't fit the content.

[@isickofit]

The Struggle is real..

[@frankierutherford1888]

He should do better. like to watch his talent go to work.

[@MrMotionmac]

I really hope you plan on addressing the hole in the frame you cut for your carb before you try riding it.

[@sueplummer-x4k]

My mates jet ski uses a steel rotor

[@jimrobcoyle]

My phenolic resin 55 cc Yamaha rotary valve pulled 13K . Why not use that for your valve disc?

[@Grooty79]

Definitely 2 Stroke Suffering 😁

[@ezequielsanuy8895]

Che genio... decime, como le vas a poner la valvula rotax en la cabeza de cilindro...?

[@lukewilliams1188]

Whats the name of the song in the beginning?

[@theotibblin]

@2STROKE STUFFING

[@chrispiecridder]

Keep up the good work you are such a brilliant engineer.

[@tommy_rotten3984]

How does the rotary valve make a perfect seal when closed - without creating lots of friction heat?

[@wags9777]

Can't wait to see what's down this rabbit hole. We know how all the other rabbits live in Norway maybe this one is the one you've been looking for.