iBEA Carb FTW! - 50cc DIY Rotary Valve Peugeot Spx

[@AuMechanic]

It's Alive ! BTW standard procedure for adjustment of MJ on Kart is to turn it rich until it 4 strokes at peak RPM, then turn it in a bit at a time until it just stops 4 stroking at peak. That gives you a "safe" mixture at peak Adjust low so it throttles off and on clean after MJ is tuned..

[@2STROKESTUFFING]

Thanks for the advice!

[@Nikel87]

On rc boats we do the same but leave it so it just 4 strokes when holding the boats still in the water. Then we just hope it won't sieze up at wot if it lifts to much from the water.

[@Hollaendaren]

I use the same procedure on Tillotson carbs on my snowmobiles. Start with the low speed, once its idling nice start with the high speed. I like to start like 3 turns out and work my way in until it stops 4 stroking. Goes for any carb really, I always try to start high on a new engine or after a modification. Sometimes it wants more than I anticipated though :)

[@benspeedschannel888]

Your patience is finally being rewarded, excellent!

[@Lord_Verminaard]

At around 5:38 in the video it looks like the engine mount bolt right above the carburetor was turning.... Man it sounded great that last pull!

[@2STROKESTUFFING]

Yep, it's loose on purpose for things to not bind up. "prototype" engine mounts, no bushings/bearings. There's a nyloc nut and loctite on it.

[@MikeyAntonakakis]

YAY YAY YAYYY!!!! LOL at that throttle cable routing @10:50. So pumped to see progress with the pumper!

[@2STROKESTUFFING]

Thanks! It was pretty awkward running it like that😁

[@diesmokeyaight6396]

Wow nice video alex. How sweet from your Gf to let you have the house for you alone so you can finish your bike. It's good to see the spx alive again i missed the purring noice from that beauty. I have a few days of to so i'm busy with my new project an 70cc aircooled minarelli 1998 . I had carb problem's to but mine were solved by simply cleaning it. Good luck with the jetting. Greetings from Holland

[@2STROKESTUFFING]

Thanks man!

[@comethiburs2326]

that carb is some seriously obscure madness. highly recommend using a fine marker to mark up where the best tune is at, you never know.

[@mihakugonic5700]

Keep up the good work, when the rews gor higher my smile got bigger :)

[@2STROKESTUFFING]

Thanks, I will!

[@daveyjones-sx6ym]

It sounds so good when its feeling well and in the powerband. Keep going man its getting there

[@2STROKESTUFFING]

Sure does!

[@Hollaendaren]

Awesome! Nice to see some real progress :) I've been waiting all evening to be able to watch, was stuck with work.

[@2STROKESTUFFING]

Thanks! Finally going somewhere!

[@bierbaum4284]

damn nice man. pizza and whisky kicks ass😅 btw, happy birthday alex!

[@2STROKESTUFFING]

Thanks!

[@TheJonsberg]

Have a Blessed birthday! Love 2-strokes, I handle chainsaws and found your channel searching for tuning tips.. I run Aspen fuel.. My ported 242 husqvarna is doing 16 773 with No load. Looking forward to your next video. Blessings from Løkken Verk Norway

[@2STROKESTUFFING]

Takker!

[@toargames]

TheJonsberg did you do the timing advance mod already on the 242?

[@TheJonsberg]

Arjan van Helden not yet, this saw is Just something else.. Bought myself a wireless tachymeter..

[@mihkus]

Doesnt seem like a good idea to aim for highest RPM, easy to destroy your engine... Normally I tune chainsaws while under load. I once ported a chinese 43cc saw and wanted to see how far I can push it. The con rod blew into pieces at 19k. Had 19mm Zama carb that was suited for 63-75cc saws... Am I wrong?

[@toargames]

The thing is when you tune a ported engine in the cut it will rise rpm @ wot when ported. Since you dont run near that max rpm in the cut this would be fine, its even possible that a saw like this will still 4 stroke hard @ wot. keep in mind this saw does stock 15500 rpm at WOT

[@TheMeca08]

THE MOTEUR IS VERY PHANTASTIQUE IL LOVE THE INGENIEUR OF THE MOTEUR IS THE BEST MECANO GOOD LUCK MAN

[@2STROKESTUFFING]

Thanks!

[@allthehandlesweretaken]

0:24 how to make any man cry

[@InIMoeK]

Looks like your damper is restricting. It’s blowing gasses through every small leak haha

[@ettla123]

Could aswell be making more power from being a restriction as it could in theory make for a stronger reversal of the exhaust pulse in the expansion chamber, who knows.. only way is to test with and without it ;)

[@khenpaulw311]

Yeah, you seem to have a major leak at the silencer weld.

[@InIMoeK]

Robin Sundell I think after the tail pipe there is no pulse interaction, unless the gasses cannot escape quick enough out of the tail pipe. But he should test without :)

[@ettla123]

i believe that if there is a higher pressure in the stinger from a restricted muffler, it could make the reversal of the pulse stronger, just my thinking out loud. but i agree he should definately test it!

[@MisterMaxicola]

In one video this guy said that smaller exhaustpipe end makes more power

[@swedtypez6309]

I had this struggle with my chainsaw carb aswell. It's really hard to adjust these carbs without a safe reference point. But my best tip is to adjust the low jet first and then adjust the mainjet. Then you get a solid base to adjust from. Also in my experience the pulse line is not nessecary when you got you fueltank above the carb since the fuel pressure will make the carb work anyway(atleast on small walboro carbs). Btw keep it up!

[@2STROKESTUFFING]

Thanks, and thanks for the tip!

[@Sl4sk1]

Flott å se at sykkelen begynner å oppføre seg igjen :)

[@kolten808]

Great progress! I wish my Dio Elite could rev that high. Also waiting to get the cylinder back from shop. Thanks for the video and happy birthday brother

[@2STROKESTUFFING]

Thanks!

[@xibidit]

wow finally!! it sounded really nice in the end congrats man !

[@2STROKESTUFFING]

Thanks! I'm really excited!

[@bikelifemiami3055]

Wow. That sound made my life better lol. Great work !

[@billclark5943]

Cool how you see the engine flow dynamics get with the program and stop blowing snot out its nose

[@janfjeld-nielsen1515]

The black adjusting screw is for high-speed....., and as you just said, those carbs shall work in _any_ position. As you probably know(?), all of the two-stroke chainsaws ar using such diapraghma carburettors, without _any_ problems related to different positions. Nice results so far, looking forward to your next attempt! :-) Otherwise, normally, there's no "mounting it like it is supposed to be"-issue. I think your problem, as you also have mentioned already, is related to the "pulse situation". My guess is that you'll get a quite different result when the pulse"problem" is fixed. And yes, it may be a small challenge regarding the correct needle / adjusting screw settings, but this also would be a bit better with the right pulse-working.

[@tejdz1337]

i once put a 27mm pumper carb on my yz80 just for the fun of it. didnt even tune it and didnt even know about the pulse port but it actually ran good

[@2STROKESTUFFING]

Cool!

[@samhunter18]

It's looking and sounding like it's got some decent torque and yeah happy birthday

[@lucastirloni9539]

Hi, here is some advice from Brazil.. i have use this carbs for some years now.. one time even instaled one of these carbs in a 4cilinder car... Hahaha If You use the vacuum hole in the carb tô Activate the inside pump, You can use the carb in any orientation! You have to use the inside pump! It Will make ALL the diference! Runs much better with the vacum LINE, makes it more tunneable.it Will be more progressive, and wont Lean out at highrevs. You shoud test It out, before losing your Head trying tô tune It without the vacum! Remenber tô check the popup pressure!! Setting the propper pressure in the popup Valve Will make the adjustment in the niddles feel more responssive. 1° vacum LINE 2° test diferent popup pressure 3° then You can tune by the neddles. Ps, watch out for the height of the arm that open the fuel.. It soud match the carb body... Sorry for any wrong words. Ps.2, Sorry If You already knou all these.. those are the things i wish someone have told me in the beggning, like "follow the yelow Brick road". Best of luck!

[@2STROKESTUFFING]

Thanks for the advice! The vacuum line is connected to the intake and pumping seems to work. On a car! That's awesome!

[@lucastirloni9539]

2STROKE STUFFING try make the intake longer, hookup the vacum tô the crank or other place away from the mouth where It wont lose as much vacum when WOT. The little pickup hole on the gasket was never enough on my expiriences Happy to help!

[@ildkild]

always meant to ask what is up with that engine moving with the foot peg? is that like a cvt shifting controll? is there a video where you explain about it?

[@2STROKESTUFFING]

Yep, it's exactly that - cvt with manual shifting control. Look through my older videos, there's one about it.

[@adamarmstrong7582]

Happy birthday man! You've got some girl there!

[@2STROKESTUFFING]

Thanks! I do!

[@harmbekx1132]

I love youre vids! I’m from the netherlands and i have a Derbi Senda DRD racing 50cc 2 stroke and a puch maxi 75cc🤙🏻 your videos helped me making my derbi faster!

[@2STROKESTUFFING]

Thanks man!

[@RockabillyRambler]

PROGRESS! CONGATS MY GUY SHES SOUNDING HAPPY!

[@2STROKESTUFFING]

Thanks!

[@donnywalker4691]

Those are great carbs used them in kart racing and learned how to tune them

[@MrDjcamo29]

5:32 your engine mount bolt is getting loose the one above the yellow sticker on the carb slide at this point in the video it is backing off some locktight/or some nylock nuts might be a good idea. great work btw the rat looks good as well

[@2STROKESTUFFING]

Good catch! No worries tho, it's loose on purpose(but with a loctited nyloc nut).

[@MrDjcamo29]

2STROKE STUFFING nice 👍🏻

[@sillen3000]

You were missing a gas pedal! It totally makes sense now! 😂😎

[@2STROKESTUFFING]

😂

[@gabrielpedrini]

Hola, yo siempre tuve la idea de un motor 2t con inyecciones directa y lubricación por bomba de aceite al cigüeñal, obvio que la admisión con un cuerpo de mariposa, nunca pensaste en eso? Se podrá hacer posible.?

[@ihateemael]

cool .. got a cover for that primary drive . .

[@2STROKESTUFFING]

Thanks! Should make one...

[@Trumplican]

just re-watched this I love "The Rat" so much! @ 7:00

[@hopsgarage5513]

Cheers to another year around the sun

[@Nikolaa011]

Love your videos and listening to your awesome 2 stroke machine but it would really be nice to see and hear that beauty on a road or track!! ;) I hope there will be a video of you riding it soon.

[@2STROKESTUFFING]

I'll get it on the road this summer!

[@killerrush77]

Happy Birthday!!! good God that thing screams!!!! 17 HP? WTH? is that real HP? out of 50CC?

[@2STROKESTUFFING]

Thanks! Yep, at the wheel.

[@turbitoescort7460]

Congratulations for everything,despacito but non pauses,one day you broke the dyno

[@2STROKESTUFFING]

Thanks!

[@david929190]

Can't wait to see the power this can make on Nitro mix or even just methanol.

[@adamadamhoney]

Love your work! Keep up the great content, edit and framing is awesome. Not even into the small 2smoke stuff anymore but love your vids. Who's the artist doing the bluegrass guitar bits too, pretty tight! Thanks!

[@2STROKESTUFFING]

Thanks! I'll have to check what artist it is.

[@stretchedbmx]

I’ve never been able to tune my pumper carb running it upside down. I’ve noticed my pulse line filling with fuel and it just stops running. I’ve even ran them right side up with no pulse signal right side up and they worked fine just with gravity feed

[@danstankowski654]

Jacob Felts sounds like u need to rebuild it

[@MrDjcamo29]

Well then happy birthday bro hope your day went great 👍🏻

[@2STROKESTUFFING]

Thanks!

[@MrDjcamo29]

2STROKE STUFFING yep everyone needs to have a great time on their birthday if they got kids

[@matejzeman7765]

Man, Im just watching that bolt on the pivot point of your engine turning and turning and turning... as you rev up. :)) Hope the bolt is locked up good. :)

[@2STROKESTUFFING]

It's intentionally left loose to not bind the mount - prototype, no bearings/bushings.

[@benhawke7231]

You lucky s.o.b! I've always wanted one of those carbs.

[@Enthropical_Thunder]

Normally i wouldn't say that but *Happy Birthday* , i hope you're having a good one ;D.

[@2STROKESTUFFING]

Thanks!

[@Henrik.Yngvesson]

Those carbs does starve under prolonged g-forces if mounted with the membranes horizontally to the force applied as the membrane adjusting the pop-off pressure pushes harder against the valve needle. I had that issue on my paramotors when pulling high G's and after a lot of testing I found out that mounting them with the membranes vertically solved that problem. Probably not a problem you'll encounter on a moped though as it may take up to 3-4 G's, but in a "wall of death" it could become an issue.

[@2STROKESTUFFING]

Thanks, better keep away from wall of deaths then...

[@Trumplican]

man i love that engine it revs like crazy!

[@Trumplican]

and the Rat is the coolest bike ever!

[@2STROKESTUFFING]

Thanks!

[@Witschor]

Happy Birthday, nice Vid good Run and interesting carb upside down flip. In Chainsaws these Carbs are Mounted like in your first Run with the Diaphragm facing down. Why not , when it works. I would definately try it with the correct impulse line , maybe it will run better. Good Luck

[@2STROKESTUFFING]

Thanks!

[@llewvirtue861]

I can't listen anymore, I remember my days in karts, and then it seizes

[@davespooney8472]

Excellent video, great results!

[@2STROKESTUFFING]

Thanks!

[@hellhaunter]

Grattis!

[@2STROKESTUFFING]

Takker!

[@mikedunbar9356]

Have you considered using a Lectron Fuel Systems carb? They don't use jets at all, they use a metering rod system, and they compensate for altitude/temperature so I feel like it could really make your tuning easier

[@2STROKESTUFFING]

I have, but they're so expensive!

[@mikedunbar9356]

maybe call him Brooks. I call everyone nicknames lol

[@matthewmargazano2780]

Beautiful sound!

[@ludditeneaderthal]

left you to your hobby with both pizza and beer! that lady is a "keeper", lol. awesome results, especially considering you're wandering into completely unknown territory for you. i can hardly wait for what kind of power the little beast makes with nitro fuel! of course, your current yield of 300+ RWHP per liter on gas is pretty damned impressive by ANY standard, especially without chunks of cylinder being surgically removed from your leg, lol

[@2STROKESTUFFING]

Thanks!

[@kfatbob1]

If you’re happy with it we are all happy with it. Progress.👌👌👆👍

[@flyingsumo3846]

Great day for you bro congrats on the progress :)

[@2STROKESTUFFING]

Thanks!

[@ifanstarr]

That was a great video!, Looking forward to the next one :-)

[@2STROKESTUFFING]

Thanks!

[@jonnyrox116]

Just a thought but have you considered using a reed switch and with a magnet attached to the rotary valve or crank to signal the diaphragm thus electrically imitating the pulse, it would be faster response wise but maybe more complicated...just a thought.

[@2STROKESTUFFING]

Interesting idea!

[@danstankowski654]

Just sounds expensive. I know the magnet would let loose and trash my engine lol

[@danstankowski654]

U can also get ur pulse from ur exhaust...

[@danosburn80]

YEAH! that's Awesome! I've only just cracked 14hp with my 79cc honda af16..

[@2STROKESTUFFING]

Thanks! Keep on tuning!

[@Gnulf]

Grattis på födelsedagen, skönt att det börjar gå åt rätt håll nu :)

[@2STROKESTUFFING]

Takker!

[@broo_shs]

On a two-stroke engine, an expansion chamber or tuned pipe is a tuned exhaust system used to enhance its power output by improving its volumetric efficiency have you test motox pipe its have bigger expansion chamber and its can pulse it much better i just wanted to ask have you test out those pipes

[@riccardobarlocco6618]

Maybe you can Fix the leaks at the axaust, good job!

[@riccardobarlocco6618]

And maybe can you make it more stable

[@davidtax6884]

Great show have you thought of a better ex pipe? I use to run rd 400 yama, and I'm sure you know .. Try a different pipe

[@emanuelventura88]

Hello i am from Portugal. Where on our 50cc bikes the old ones , they come with about 8hp . But are kits for them 80cc kits . And then they make the double off the power. How is possible to much power that you have (17hp) with a tiny piston?? By the way your canal is really good 💪💪

[@2STROKESTUFFING]

Thanks! It's mostly down to port/duct geometry and the pipe. And 17 at the wheel with the CVT is probably past 20hp at the crank...

[@Karelinish]

Great video! I am currently working on building a Frankenstein moped and am trying to find the perfect cylinder. Have you seen some of the newer Athena kits for the Minarelli am6? They come in 50cc and 80cc and the interesting part is they have a power valve that works off pressure from the exhaust. If you could check them out and let me know what you thought that would be awesome. Thanks

[@danstankowski654]

Karelin James definitely not something new the way the powervalve works off exhaust pressure. Look into the snowmobile world. Very common

[@TheGalifrey]

Told you a Tillotson would do it :D Nice slide carb body on it as well!

[@TheGalifrey]

Also, do run the pulse line from the crankcase, the fuel delivery will be much more positive with a solid moving diaphragm.

[@loadingboost4648]

På 9:00 ser det ut som det lekker eksos? Det ryker liksom bak potta

[@2STROKESTUFFING]

Slip jointen mellom lyddemperen og potta er slitt og ikke helt tett, må fikses for det spruter olje på rulla.

[@benasvenckus.]

You're such an awesome guy!

[@2STROKESTUFFING]

Thanks!

[@robertodefreitasnogueira7313]

As a last attempt I would change from conhaque to Wyborova.

[@tylersong4103]

Glad your project has finally made some positive headway ! Unfortunately my super awesome bike that I just got done building and testing I now have to take apart to ship overseas for my year long tour across the pond. However it will be a blast pissing off the electric scooter guys with my super angry two stroke with pedals

[@2STROKESTUFFING]

Thanks! Year long tour with angry two stroke sounds fun!

[@tylersong4103]

2STROKE STUFFING the look on peoples faces when you blow by them on “bicycle” is priceless although at this point I’ve basically built a small motorcycle. I feel as if I’m not getting in the power band as good as I could be though not sure what the deal is

[@late9462]

happy birthday!!

[@2STROKESTUFFING]

Thanks!

[@e-z.g4188]

Great video mate

[@2STROKESTUFFING]

Thanks!

[@jacksonbermingham2168]

3 needle I know I'm behind the 3 months. Closest to intake manifold or engine is low jet mid screw is high jet .. that 3rd screws is something different never seen it before super high jet.. this carby is probably for a 100cc or 125cc.. u may need to run a higher spring rate spring / on pop off pressure . Most likely both.. it will help you to control your low and high -wider working window.soo to lower a spring rate is rich higher is leaner.. higher the spring rate the harder the engine has to work to draw fuel from the carby..the u factor in the metering with the fulcrum arm to diaphragm .. higher metering arm more fuel lower leaner level with the body is close if not on the money... plus the ibea fulcrum arms wears and they get soft and flexible to the point I think it changes while running .. bad for tune if u can find a stainless arm from ether tilliston or tryton it will last longer and hold your settings true for longer..

[@2STROKESTUFFING]

Thanks for the tips!

[@twinstaged]

that transmission will make it hard to be consistent on the dyno.

[@2STROKESTUFFING]

I let it wind out fully before I take the reading, works ok.

[@GannMan7788]

love your videos, and for a subject that i'm very interested in and assumed was just about dead. I'll be watching

[@2STROKESTUFFING]

Thanks man!

[@andy198712]

Happy birthday :)

[@2STROKESTUFFING]

Thanks!

[@Hermiwalle]

1 update vid thingy on the motorized bicycle?

[@2STROKESTUFFING]

It's coming, I'm just on a roll with the Spx atm.

[@tylerraines3451]

Hey 2 stroke stuffing it look like your end can is leaking alot of the exhaust gas ? The end plays a roll in the back preasure etc im sure you know what your doing it may not be loose but it looks like its flopping about man , check it out if you can and let me know im intrested if it just looks like that from the wheel rotation and keep up the vids man i love them , i wish i had a dyno i have a moped a gilera storm 50 cc with everything done to it , im running a Airsal Tech Racing 50cc - chrome mahl single piston ring , how can i make my own dyno ? And what will i need as a shop called Pedparts near me dont use there workshop/ dyno no more because there so busy with selling parts i wanna know the true out put im making like you do

[@tylerraines3451]

Also were can i buy one of your boards for a dyno to use with the simple dyno program? Thanks

[@2STROKESTUFFING]

Yep, the slip joint is worn and leaking. For ardyno boards go to ardyno.weebly.com, check out my videos on the diy dyno for how I built it.

[@paansukarjo90]

dude.. I think ur muffler connector is leaking. there is some smoke came out at the connector between the the muffler and the pipe

[@2STROKESTUFFING]

It is!

[@lexeriw]

Is true that this type of carb doesn't have a good partial throttle response ? I have a AX 100 (similar to the RX100 but crappier) with some mods and i need a better carburetor, since i don't have too much space this type of carb will be ideal

[@2STROKESTUFFING]

Not enough experience with it yet, sorry.

[@jurrianmulder2526]

8:54 you're exhaust is leaking at the tailpipe...

[@2STROKESTUFFING]

Yep, need to seal the worn out slip joint.

[@pietroc.6246]

Happy bday! (i suppose im late but whatever)...we need more punk music!

[@2STROKESTUFFING]

Thanks! It's actually tomorrow. More punk it'll be!

[@griffspeed]

You can use some of the "Searching for David" music off my page if you want Alex.. It would be nice to see it being used for a good cause! Hope you had a great Birthday..

[@2STROKESTUFFING]

Thanks man, I'll check it out!

[@fabiotiburzi]

I want that carburator for my vespa!

[@2STROKESTUFFING]

It's sweet!

[@mikeskidmore6754]

It makes a lot of noise anyway .. So 15.9 HP on what fuel ????

[@foreverhungry84]

use spray adhesive on the back tire to gain traction

[@2STROKESTUFFING]

Good tip, doing that already. Won't work when the pipe is spraying oil all over it, need to seal the silencer slip joint better.

[@danstankowski654]

Rubberized under coating on the roller helps for a lil while. Sand blast the roller as well. Their is a place by me that electro coats all types of metals/alloys with the best I can describe it is like a concrete road or 5 grit sand paper lol

[@maximopizarro7597]

Try in to system kooler, plus try a cool can

[@largejoseph7914]

This is your best video yet! Very enjoyable. But is it just me or is the exhaust leaking right behind the silencer?

[@2STROKESTUFFING]

Thanks man! The slip joint is worn and leaking.

[@johnpanteris249]

i thing that if you bend your rotary valve,litl like propela on the edge.and make bigger housing for the bend to fit.2 things can happen,first it will boost the engine 2 the inaction of the fuel/air is not going to be a problem on hi rpm because the air fuel when it stops and starts has inaction.and slow down on hi rpm.thats a reason you cant go hi rpm.but with bent rotary valve the air/fuel has 2 ways to travel in the cylinder or around the rotary housing so never stops moving but get higher and higher speed,try it.

[@2STROKESTUFFING]

Interesting idea. I fear this propeller would have to move alot faster than the crank tho, to not become just a restriction. There's a pretty huge amount of air passing through up in the rev range.

[@johnpanteris249]

not a propela just a rotary valve with a bend on the start,it will keep when it close a amount of air fuel on the frond of it(cylinder side) spinning centrifuge for 180 degree ready to cam in the cylinder.on the back of rotary valve(calbulator size)when the rotary close the intake.the stream of air don't stop just continue spinning.this makes the two stroke engine continue filing the hole cylinder on hi rpm.so you produce hi power.i have try something like that(same idea)but on cylinder intake)just try not to stop the intake stream but instead changing roads.on a mtx125 engine.then it could rave on 14500 rpm easy production power up there.the mtx engine before that only go about 9000rpm.other modification a delordo 32 whit 280 fuel jet!! it work whith no problem hi or low rpm....so something is there.

[@2STROKESTUFFING]

Very interesting, thanks for sharing! What did the system you used on the Mtx look like?

[@johnpanteris249]

i will try to explain with my poor English,iam a Greek man.the most difficult thing on 2 stroke engine in my opinion is to fill with mixture the upper side of cylinder and the back of the piston.the upper side o the cylinder i difficult because the ports on cylinder is just over the piston when its far down.and when they open they one is oposit to either so the mixture from one crash to the mixture of the other and loose speed,after that the mixture try to travel up to the top of cylinder.this take time.so the most of the time the cc of the cylinder is not complete full.as the rpm go up the more the cylinder not full.till you fell the power drop suddenly.before the inaction of piston rod stops the engine.so first thing is to fill the upper side of cylinder with mixture,i did that by making on the top of the piston litl ramps were the intake ports are.i did the ramps by grinding the piston head with a little disc tool.the results were more than i expected.low or hi rpm the engine felt like more cc and try it you will see...more comming next

[@danstankowski654]

john panteris essentially what u did is port it. U changed the port timing. When I do r&d on new cylinders I build from scratch that is how much to alter, verse cutting the port timing to much and that’s a lot more expensive any time consuming. Usually I’m within . .25-1.5 degrees with my algorithm

[@timothysvec8568]

Pulseline connected to crankcase is what gokart guy's do. Also is that a 28mm ibea?

[@2STROKESTUFFING]

Yep, that's how it's supposed to be. 29.5mm

[@danstankowski654]

As do watercraft and sleds

[@seanthomas2906]

Joy-gazum big smiles mate brilliant

[@2STROKESTUFFING]

Thanks!

[@gressi9995]

Hva har du tenkt å gjøre med sykkelen når du er ferdig å "tune/bygge" den?

[@2STROKESTUFFING]

Aner ikke, men ingen fare - blir nok aldri ferdig...

[@luckyr3675]

i would say that it's would be more optimal to have a pulse line that goes into the crankcase

[@2STROKESTUFFING]

Probably, I'll see how it goes.

[@danstankowski654]

Pulse is pulse. Carb has no idea or cares about where it comes from

[@stevenboelke6661]

Speaking of rotary... have you heard of the liquid piston engine? It's a four stroke, three chambered engine that has ports rather than valves. It's described as an "inside-out wankel". It seems like ot would be simple enough to duplicate.

[@Headerflame]

Yeeeehaaaaw!!! That’s good news! Looking forward to seeing some BIG numbers. Btw, that rat bike is fuckin badass!

[@2STROKESTUFFING]

Thanks man!

[@NowAndyPlays]

Grandis :)

[@derknobit2616]

Happy birthday

[@2STROKESTUFFING]

Thanks!

[@johnpanteris249]

try tesla one way valve to intake.

[@carterflom9957]

How did you learn everything you know about 2 strokes???

[@2STROKESTUFFING]

Being obsessed with 2 strokes for many years you're bound to pick up a thing or two.

[@danstankowski654]

2STROKE STUFFING plus lots of trial and error, mostly errors for me the first 5ish years doin mods. Been building for 30 years now and thank god them days are gone. Very expensive. A cheaper way to practice porting is to cut the actual piston crown and skirt. Can get the exact same effect that’s not permanent or as expensive as a cylinder. I figured that one out myself lol

[@NorbertJungholt]

Perfect!

[@2STROKESTUFFING]

Thanks!

[@arcticblack3764]

Try using stage 6 or Malossi parts.