I believe this is my problem ,My bike boggs out bad and back fires anywhere after like 1/5 throttle , I can't get above 2nd gear sometimes,I have rebuilt my carb , top end , replaced the coil , I have had my neighbor (He has allot of bikes) tru to fiddle with my carb needle and jetts but didnt help please any suggestions will help , Would a cracked reed cause the bike to bog and lose (ALL) performance?
I have a yamaha IT 200 and i wanted to know if having a stopper on the reed valves effects its performance, and if you take it off if you could get more power out of the bike
Wow man. You just completly explained it perfect to me. I'm going to school for the automotive industry, and that reed valve make a whole lot of sense. I was wandering how a two stroke with no valves (like on a four stroke) kept its vacume, and as I was searching on two strokes online(mainly because I am getting interested in pocket bikes) I came upon the term reed valve. And thanks to you for your well explain video.
@Thrashvel I am glad it helped you. I dont know everything in this world, but what I do know, I make a video and try to explain it, the way I would like it explained to me, if I was trying to figure it out. Glad to help out bro. RH DSD
Hi Speed Demon , I recently bought a yamaha tzr 250 2 stroke that is in great condition but I have noticed that it is very heavy on fuel, what should do you think is the problem. Thanks
did you know that a two-stroke outboard motor will barely run. If you remove the intake cover it allow so much air in to the front of the cards.
That it will not deliver enough vacuum to suck gas and the vacuum fuel pump.
This is a discovered it. I've made after working on a motor for nearly 2 years. I remove the front cover off of the carburetors. The motor would run, but only for a few minutes and then die only works with the cover on.
i have a question. my yz 125 just died out of no where when i was riding. i checked the spark plug and it was not fouled. i just cleaned the carb and it is getting gas. but it still wont start. is this a reed issue? or a piston and cylinder issue?
ok it seemed more about the piston than the reed valve. I am having problems with my 2 stroke scooter not getting gas to the cylinder, the spark plug is not wet with fuel but gas is getting to the carb just fine. is this my reed valve? could it be a bad seal because the reed valve is fine but the seal between it and the engine block is pretty bad. answer?
@azjmiles The engine is a SEALED air pump. NO LEAKS between the carb outlet, and the exhaust outlet. Take the reed block off and seal every leak, or AIR will get in, LEAN the Gas mixture and you will have no idle. RH DSD
@CaseIH232 THIS IS NOT A INSTRUCTABLE VIDEO. THIS IS MY LIFE. YOU ARE NOT WATCHING A TEACHER OR BEING TAUGHT, YOU ARE WATCHING MY LIFE AND I PLAY WHATEVER I LIKE. JUST BE GLAD I DONT LIKE OPERA MUSIC. (my latest 1000 videos dont have music in them).
what do you think about inverting reed valve someone told me to invert mine cause my bikes old and they need to be ordered from a dealer and its a crazy price
@davison1021 I have never heard of inverting a reed valve as it only works one way. If you manage to do it, make a video and post it, I would like to see it. I would suggest taking good reeds and cutting them to fit. I have many videos on doing just that.
@LetsRide738 hi, i would like to know the same question about my bike, because my old reed valve had no stopper, and the new one does, so if you find anything out could you please let me know, thanks
My Dio sucked some mterials from my airfilter and stuck the REED valve to OPEN position, it didn't START at all! I found out that the valve was open when I put mah hand in the CARB and CHOKE it! Some AiR push mah hand out!
U will also notice that the REED valve have some damage, if u see 2T oil gush out from ur CARB!
get this my reed valve had a fucking wallnut in it from the old owner and it still ran and had power thats y my rpms were goin crazy i think thts just amazing how it ran so strong
@Trutzblatt I'm sorry, son, but you misspelled "ungreatful." It's 'ungrateful.' The video about the two stroke reed valve engine is informative. Those of us who do not have a limited attention span quickly tire of extraneous and unneeded sound tracks. I repaired reed valve oxygen concentrator compressors for several years without the help of annoying noise from radio stations programed for teenagers.
hi do u have any experience in YAMAHA CUTE? its a scooter bike,, i have a very old 1 here i plan 2 restore it.. can u make a video on building it..?or can u make a video about CDI..plzzz
Two stroke motors can rev in excess of 18,000rpm. around 3 or 4 years ago the top class of karting used yamaha kt100 2 stroke engines. Generally for normal club level racing these would rev to around 15,000rpm. Top class european karting rules allowed them to be modified to rev in excess of 18,000.
The Boyesen Reed blocks are specially desighned for the V-force reeds. Dio cannot use this block or any Boyesen block, they are too damn big. I would stick to boyesen yellow performance reeds and custom fit them to the CT or Dio intake. The reed material is what counts and Boyesen is the best for Ultra High RPM's.
@ziuuek123 Yea right troll... The man knows what he is talking about and is cool enough to share it with us that are willing to learn... You on the other hand have no idea how to form a proper sentence but we forgive you...
No he doesnt !! Nor do you my small minded foolish no-friend! BUT NO ONE FORGIVES YOU FOR BEING A DUMB ASS or actaully thinking someone cares about "forming a proper sentance" on fuckin you tube LMFAO
@robbmeex Get this , = there is no script, it is all in one take and what I am thinking at that exact moment. No scripts, NO EDITING< NO computerized gizmo shit. I simple dont know how to do it. All Video is raw video and it is What it Is.
No, the bulge is an expansion chamber. The reed valve handles gas and air going into the engine, the expansion chamber deals with exhaust coming out. The Intake and Exhaust ports are allowed by the piston to be open at the same time, which means fresh gas escapes into the exhaust. As all this air, exhaust and gas goes into the pipe, it makes a shockwave. That wave bounces off the back end of the bulge and comes back, forcing the gas back into the cylinder. It only works at the "right" RPM.
@gilessmokey I quote from Gordon Jennings on page 54 of the two-stroke tuner's handbook:
"In the due course of time, this wave arrives at the back of the exhaust port itself, stalling the outflow of the fresh charge. Indeed, it will momentarily reverse the flow there, stuffing what otherwise might have been lost back into the cylinder."
That states that it is, at least at some point, forcing gas back into the cylinder. This isn't all the expansion chamber does, but it is part of it.
@JETZcorp thanks for rep. the trick with a twostroke is not to get fresh charge in the exhaust in the first place because it is lost there. when you think of it any fresh charge would be mixed with exhaust and probably burning. you would not want that back in your engine and that wont up the power furthermore at this time the piston would be rising and driving out remaining gas. the function of a tuned pipe is to get more flow through the engine and that doesn`t happen by reversing the flow.
@gilessmokey If the entire point was to improve flow, then they wouldn't add the second part of the chamber. The increased flow is caused by the diverging cone of the chamber, which creates a negative pressure wave and sucks out the exhaust. A long time ago, they just left it at that with a big "megaphone" pipe. But the second part of the expansion chamber is there to keep fresh charge in the cylinder. So the pipe does increase flow but then it also keeps itself from sucking out too much.
@JETZcorp nearly there, but two strokes never used megaphone(one cone pipe). that was fourstrokes. the job of a pipe is to empty the cylinder quickly. an empty cylinder then encourages refilling by the carefully angled flow from the transfer ports this is done in a loop fashion directed away from the exhaust. this takes a little while but if the engine is run too slow or if the exhaust port is made too high some will be lost to exhaust. and that is why they tend not to perform well at low revs.
@gilessmokey That's all true, and that is the function of the diverging cone of the expansion chamber. It creates a lower pressure at the exhaust port, which causes the exhaust gas to exit more quickly and for more air-fuel mix to come from the transfer ports. However, once the scavenging process is done, you've got too much air-fuel mix in the cylinder, and it starts escaping out the exhaust. That's where the back of the chamber comes in, to cram that back in.
@JETZcorp once fuel is in exhaust it is lost, it happens that is why twostrokes use more fuel and emissions are up. the trick with a twostroke is to keep fuel out of exhaust in first place. it would not be possable for a pipe to extract then cram back and to get it right at various revs.nor desirable for reasons mentioned earlier. thankfully there is direct fuel injection which eliminates this problem, and ups performance.why we have not seen much of it i don`t know.
@gilessmokey Well, it would appear you are arguing against a fairly well-respected authority on the subject, namely Gordon Jennings. And who says it's lost because it's mixing with exhaust? Who says that once air-fuel mix passes that magical point of the exhaust port, it suddenly HAS to mix with exhaust gas and be unusable?
The main thing that positive pressure wave does is keep fresh mix from passing the exhaust port, but at some point, according to Jennings the flow is momentarily reversed.
@JETZcorp i will now let the readers make their own minds up. you can trace the tuned pipe back to ww2. late ww2 germans were sending us brits doodlebugs, flying bombs powered by pulse jets (tuned pipes with no moving parts producing pulse thrust). after the war it was east german mz motorcycles that first used tuned pipe to extract more power from their 2t racers, other twostrokes could not compete.i`m told suzuki collered mz engineers and technology spread. is that in book?
@gilessmokey The book doesn't really give all that much history, it's mainly focused on explaining how things work and how you can expect things to change when components are modified. I have heard about Walter Kaaden from MZ, though.
I think you did a great job explaining, on your videos I think you should kinda build a script of how you want to talk about the process. You did a little to much thinking and not enough talking on this.
Anndd,, It has an air tight seal here, here aannnddddshhhhh....... ermm here here n here n here n everywhere's air tight.. Anyway as the piston goes down -6 second pause- it takes the fuel and tried to push it back out through the ermmm the fuel and air charge tried to push it back out,,, ... Ahahh man thats funny shit.. I'll try not to remember this.. I'll wait for some1 else to upload another reed valve explanation vid up and i'll learn off that 1.. That engine looked wierd.
I suggest you make a video of your own. I Have 1.7 million views. What you got mate?? Not Jack Shit. That is American for Nothing mate. Stick to trampoline bikes, whatever the hell that is. RH DSD
@AceOfSpadesPRO01 Having trouble understanding? Maybe it would be easier for you if you focused on the subject instead of concocting your next overdone unsult.
yeah the reed catches the intake spit back on the intake stroke wich makes a big diff in the low, weld on a 125 honda reed system, band saw the entire intake of the cylinder and weld it on, now your talking way better top end.
Piston goes up draws fuel/air mix thru the reeds into the crank case below the piston the piston comes down compresses the mixture the reeds close. as the piston goes further down the compressed mixture is blown into the cylinder as the ports are uncovered simple :)
It's amazing that the 490 Maico got so much more horsepower than any other open-class without using a Reed Valve. I mean, Husqvarna was using them in '77, maybe earlier, but Maico waited until after '81 (or later!) and still had more power, and smoother power than the competition. Amazing.
hay i just telling u if use want to put nos on a little engine like this its not a good idea because u should have fuel ingestion to get the most out of the nos.y is this u mite ask its because air changes in the block/cylinder and with a carb u can't get that because u will always have a rich miture of fuel and air and wen u try to use nos
so regardless of carb size etc the mixture is decided by the actual nos system when it is running.
Bare in mind the nos is basically the oxygen, extra oxygen needs extra fuel, so both r added.
IE, u have to have a fuel pump to go with nos and fuel injector and nos injector, or both with a premix chamber, not exactly sure but thats how they work.
i can see what you are saying but it is not the main reason. some mixture does escape through the exhaust port but a good expansion chamber will ram most of it back in again at optimum rpm. a 4 stroke engine has an intake cycle (where it draws in mixture) starting every 720 degrees. a two stroke engine has one starting every 360 degrees. therefore twice as many intake strokes = higher fuel consumption.
I am trying to put my two-stroke thoughts in laymans terms, with the limited understanding of a beginning two-stroke theorist. I actually know very little about this new hobby of mine. ANY advice you could give would be greatly appreciated. RH
I have been thinking about it , mate. NOS actually has a moped/scooter nitrous kit for about 800$. With all the belts and pulleys instead of gears, I dont know if nitrous would be too much on them. It would look kinda cool with a big red ignite button, on the dash.
so would the reed valve being broke on a yamaha banshee cause it not to fire on the side which is broken
caudle1000 3 days ago
HAHAH "It wants to suck something." If only we were talking about my girlfriend.... :/
cjleger337 4 weeks ago
@cjleger337 SHE GOT A SISTER?? lol.
DIOSpeedDemon 4 weeks ago
hi, I was wondering if you could fit reed valves to an engine that didn't come with them as standard and would it boost the power of the engine
batesy636 1 month ago
@batesy636 Yes you can and yes it will. I have videos of me fitting a boysen reed to my honda moped and it works great.
DIOSpeedDemon 1 month ago
I believe this is my problem ,My bike boggs out bad and back fires anywhere after like 1/5 throttle , I can't get above 2nd gear sometimes,I have rebuilt my carb , top end , replaced the coil , I have had my neighbor (He has allot of bikes) tru to fiddle with my carb needle and jetts but didnt help please any suggestions will help , Would a cracked reed cause the bike to bog and lose (ALL) performance?
MultiUnanimous 1 month ago
first of i love your music tastes.
but this is more of a how a 2 stroke engine works, so how how does upgrading your reed valve help performance?
Krazer2100 1 month ago
i actually get it now
alexwerf19 5 months ago
I have a yamaha IT 200 and i wanted to know if having a stopper on the reed valves effects its performance, and if you take it off if you could get more power out of the bike
Mryamha98 5 months ago
Wow man. You just completly explained it perfect to me. I'm going to school for the automotive industry, and that reed valve make a whole lot of sense. I was wandering how a two stroke with no valves (like on a four stroke) kept its vacume, and as I was searching on two strokes online(mainly because I am getting interested in pocket bikes) I came upon the term reed valve. And thanks to you for your well explain video.
MrGrumpy891 6 months ago
do you have any idea where i could find performance reed valves for a 70 cc big bore kit i have on my 81 honda na 50
eroc2689 6 months ago
can you believe my KX repair manual doesn't say anything about the reed valve?
So i'm glad you made this video.
Thrashvel 7 months ago
@Thrashvel I am glad it helped you. I dont know everything in this world, but what I do know, I make a video and try to explain it, the way I would like it explained to me, if I was trying to figure it out. Glad to help out bro. RH DSD
DIOSpeedDemon 7 months ago
Hi Speed Demon , I recently bought a yamaha tzr 250 2 stroke that is in great condition but I have noticed that it is very heavy on fuel, what should do you think is the problem. Thanks
HamasWar3 7 months ago
@HamasWar3 Change your reed valves to new ones. That sounds like it could be the problem.
DIOSpeedDemon 7 months ago
hopw u know if one is bad? my honda spree will start and bog then eventually rev up and stay revved up unles i take my hand off the gas
borderlineartistic 7 months ago
Hello,
did you know that a two-stroke outboard motor will barely run. If you remove the intake cover it allow so much air in to the front of the cards.
That it will not deliver enough vacuum to suck gas and the vacuum fuel pump.
This is a discovered it. I've made after working on a motor for nearly 2 years. I remove the front cover off of the carburetors. The motor would run, but only for a few minutes and then die only works with the cover on.
Thank you
memberson 8 months ago
@memberson The two stroke motor is a sealed air pump and must have the right amount of fuel to air ratio or your right= It will not run.
DIOSpeedDemon 8 months ago
i have a question. my yz 125 just died out of no where when i was riding. i checked the spark plug and it was not fouled. i just cleaned the carb and it is getting gas. but it still wont start. is this a reed issue? or a piston and cylinder issue?
TheSaxplaya1 9 months ago
ok it seemed more about the piston than the reed valve. I am having problems with my 2 stroke scooter not getting gas to the cylinder, the spark plug is not wet with fuel but gas is getting to the carb just fine. is this my reed valve? could it be a bad seal because the reed valve is fine but the seal between it and the engine block is pretty bad. answer?
azjmiles 9 months ago
@azjmiles The engine is a SEALED air pump. NO LEAKS between the carb outlet, and the exhaust outlet. Take the reed block off and seal every leak, or AIR will get in, LEAN the Gas mixture and you will have no idle. RH DSD
DIOSpeedDemon 9 months ago
@azjmiles it could be old-worn out diaphragms
outdoorsman310 9 months ago
@outdoorsman310
Gotta filter out those who aren't "Spongeworthy"
alexscothern 8 months ago
@alexscothern what?
outdoorsman310 8 months ago
@alexscothern what?
outdoorsman310 8 months ago
how the two stroke works?and why they called it a two stroke and how many type of that valve for the two stroke engine?,just asking,sir
joel80435 9 months ago
how the two stroke works?and why they called it a two stroke
joel80435 9 months ago
@joel80435
Are you asking why it's called a "Two Stroke"?
If so-it's because the engine completes one complete "Cycle" in only two strokes (1 up, 1 down).
-whereas a "Four Stroke" has 4 (Intake, Compression, Power, Exhaust). A related, yet very different design.
alexscothern 8 months ago
Smart man good tutorial.
jplumber100 9 months ago
More power more Speed...kool
jermaine7771 11 months ago
Why do you play music during an instructable video?
CaseIH232 1 year ago
@CaseIH232 THIS IS NOT A INSTRUCTABLE VIDEO. THIS IS MY LIFE. YOU ARE NOT WATCHING A TEACHER OR BEING TAUGHT, YOU ARE WATCHING MY LIFE AND I PLAY WHATEVER I LIKE. JUST BE GLAD I DONT LIKE OPERA MUSIC. (my latest 1000 videos dont have music in them).
DIOSpeedDemon 9 months ago 2
what do you think about inverting reed valve someone told me to invert mine cause my bikes old and they need to be ordered from a dealer and its a crazy price
davison1021 1 year ago
@davison1021 I have never heard of inverting a reed valve as it only works one way. If you manage to do it, make a video and post it, I would like to see it. I would suggest taking good reeds and cutting them to fit. I have many videos on doing just that.
DIOSpeedDemon 1 year ago
@DIOSpeedDemon srry i ment flip em
davison1021 1 year ago
@davison1021 Flip em all you want, just make sure the edges that seal are smooth or take some sandpaper and sand em smooth.
DIOSpeedDemon 1 year ago
@DIOSpeedDemon ok cool man thanks
davison1021 1 year ago
hi can i bend the reed valve stopper thing out abit more for more power and speed?
LetsRide738 1 year ago
@LetsRide738 hi, i would like to know the same question about my bike, because my old reed valve had no stopper, and the new one does, so if you find anything out could you please let me know, thanks
Mryamha98 5 months ago
great video
mrjimbeam2009 1 year ago
This has been flagged as spam show
do you even know what you are saying ? lol
bingbingface 1 year ago
Smoked too much weed i think :)
MentalChainsawDude 1 year ago
@MentalChainsawDude for realz....
lorollinls 1 year ago
i got a 50cc china made bicycle engine kit any good ideas on how to make a reed valve for it?
ihelk 1 year ago
painful
thatseverin 1 year ago
what woud happen if you reed balbe was broken of not working probley? would it start? what would the compression be?
mowerwizerd 1 year ago
@mowerwizerd
My Dio sucked some mterials from my airfilter and stuck the REED valve to OPEN position, it didn't START at all! I found out that the valve was open when I put mah hand in the CARB and CHOKE it! Some AiR push mah hand out!
U will also notice that the REED valve have some damage, if u see 2T oil gush out from ur CARB!
bayyagg 1 year ago
"so it wanst to SUCK SOMETHING... to put it in simple terms" lolololol
corotor12345 1 year ago
rock on dude
dawgdan1 1 year ago
Cool video! now I finally understand how these things really work
sickwidit951 1 year ago
The music is Good!
ZagyVU 1 year ago
what have you injected man ?
let some air in to your space to let the fumes out
kirtokosseamrica 1 year ago
dude turn music down ,
don32577 1 year ago
thanks for explanation, i thought reed valve is before expansion chamber :)
whitebear26 1 year ago
he talky no good
gscrotes93 1 year ago
Killer song in the background! Great explanation too!
BACKBONEBAND1 1 year ago
can get a REED VALVE for 30cc engine ?
keltky 1 year ago
@keltky You can make a reed valve out of any reed material to fit your size application, My bike has custom boyseon reed valves and works perfect.
DIOSpeedDemon 1 year ago
Hey man, do you think you can get a REED VALVE for 30cc engine to me ?
keltky 1 year ago
dude whats with the dramatic pauses
rippinlt 1 year ago
@rippinlt Because I am dramaticly fucking old man.
DIOSpeedDemon 1 year ago
get this my reed valve had a fucking wallnut in it from the old owner and it still ran and had power thats y my rpms were goin crazy i think thts just amazing how it ran so strong
rohockeykickass 1 year ago
I really dig that reed block design.
60spastlife 1 year ago
EISAI KARAGIOZHS VLAKA THA MAS MATHEIS KAI APO MHXANIKA VROMOAMERIKANE
rantosda 1 year ago
VFORCE FOREVER
gamejr84 1 year ago 3
@gamejr84 Amen to that brother.
DIOSpeedDemon 1 year ago
The rock music is annoying and distracting.
zeekwolfe 1 year ago 11
@zeekwolfe yes, I know, I will make another video without the music explaining the reeds better.
DIOSpeedDemon 1 year ago 4
@zeekwolfe
Geee.....why aren't you just thankful someone is showing you something......ungreatful s.o.b.
Trutzblatt 1 year ago
@Trutzblatt I'm sorry, son, but you misspelled "ungreatful." It's 'ungrateful.' The video about the two stroke reed valve engine is informative. Those of us who do not have a limited attention span quickly tire of extraneous and unneeded sound tracks. I repaired reed valve oxygen concentrator compressors for several years without the help of annoying noise from radio stations programed for teenagers.
zeekwolfe 1 year ago
@zeekwolfe agreed
brianmiller71 1 year ago
hi do u have any experience in YAMAHA CUTE? its a scooter bike,, i have a very old 1 here i plan 2 restore it.. can u make a video on building it..?or can u make a video about CDI..plzzz
the06enzo 1 year ago
thoughs reed wvalves look funny :P
fefieiy12345 1 year ago
Two stroke motors can rev in excess of 18,000rpm. around 3 or 4 years ago the top class of karting used yamaha kt100 2 stroke engines. Generally for normal club level racing these would rev to around 15,000rpm. Top class european karting rules allowed them to be modified to rev in excess of 18,000.
sgswgn 1 year ago
@sgswgn I wish my engines could rev that high.
DIOSpeedDemon 1 year ago
@DIOSpeedDemon it probebly could, just not for very long :P
joshs088008 1 year ago
@sgswgn
rc car engines are two strokes(nitro engines)...some of the smaller ones can rev close to 50,000 rpm! that is just plain insane.
jebova2301 1 year ago
@sgswgn those 2 stroke remote control car engines can rev 30,000+ rpm
CITYFORLIFEDAN1991 1 year ago
Good vid man- I am about to take my 2-stock certification test and it seems youtube is a good way to study :p
Ijustwatchfunnycrap 1 year ago
Yeah Boyesen's good used then too.
deltaalpha21074 1 year ago
Informative, thanks for sharing
98NSX 1 year ago
Why is it better to have V-force than Stock???Carbon Fiber and if tuned directly with the pipe ie FMF---- Optimum performance can be achieved.
deltaalpha21074 1 year ago
The Boyesen Reed blocks are specially desighned for the V-force reeds. Dio cannot use this block or any Boyesen block, they are too damn big. I would stick to boyesen yellow performance reeds and custom fit them to the CT or Dio intake. The reed material is what counts and Boyesen is the best for Ultra High RPM's.
DIOSpeedDemon 1 year ago
wtf? get yer shit straight
lakefield 2 years ago
u have no idea about 2 stroke
ziuuek123 2 years ago 2
@ziuuek123 Yea right troll... The man knows what he is talking about and is cool enough to share it with us that are willing to learn... You on the other hand have no idea how to form a proper sentence but we forgive you...
cperry005 2 years ago
No he doesnt !! Nor do you my small minded foolish no-friend! BUT NO ONE FORGIVES YOU FOR BEING A DUMB ASS or actaully thinking someone cares about "forming a proper sentance" on fuckin you tube LMFAO
DidUAskMeFirst 2 years ago
Wow I wish I was as tough as you are behind a keyboard...You wouldn't say shit to me if we were face to face pussy...
cperry005 2 years ago
@cperry005 ye but i wont forgive you ur luck of knowledge
ziuuek123 1 year ago
@ziuuek123 u hava noa idea-a how to spell-E...
DIOSpeedDemon 1 year ago
Mądre...ja się w swojej ns w to bawilem:)
SUPRAGT330 2 years ago
-- @ stroke very simple , and easy to repair ... simply great engine ,.,..
aviomaster 2 years ago 4
stfu haters....this is a very good video, the man is showing how stuff works...if you don't care, or already know it, just move along..
FrostbornX 2 years ago 19
good video
jamesquicksilver 2 years ago 4
Needs more script, less classic rock. But thanks for the explanation.
robbmeex 2 years ago 4
@robbmeex Get this , = there is no script, it is all in one take and what I am thinking at that exact moment. No scripts, NO EDITING< NO computerized gizmo shit. I simple dont know how to do it. All Video is raw video and it is What it Is.
DIOSpeedDemon 1 year ago
your clever
ribeye2k7 2 years ago
i think this video wants to suck something
3.28
all3arth 2 years ago
What about those Puch split singles ! Clever stuff ! Great looking bikes also ! Peace Ye`all !
auto4union 2 years ago
He's right, a properly designed expansion chamber really helps out the whole process and acts almost like a supercharger when it comes to 2 strokes.
redcarsarasota 2 years ago
not the best explanation
fangus503 2 years ago 3
so that's what the huge bulge in a 2-strokes exhaust is for?
xGSxMayhem94 2 years ago
No, the bulge is an expansion chamber. The reed valve handles gas and air going into the engine, the expansion chamber deals with exhaust coming out. The Intake and Exhaust ports are allowed by the piston to be open at the same time, which means fresh gas escapes into the exhaust. As all this air, exhaust and gas goes into the pipe, it makes a shockwave. That wave bounces off the back end of the bulge and comes back, forcing the gas back into the cylinder. It only works at the "right" RPM.
JETZcorp 2 years ago 2
@JETZcorp forcing the gas back in is not correct. that is not how a pipe works.common misconception. find out what really happens.
gilessmokey 1 year ago
@gilessmokey I quote from Gordon Jennings on page 54 of the two-stroke tuner's handbook:
"In the due course of time, this wave arrives at the back of the exhaust port itself, stalling the outflow of the fresh charge. Indeed, it will momentarily reverse the flow there, stuffing what otherwise might have been lost back into the cylinder."
That states that it is, at least at some point, forcing gas back into the cylinder. This isn't all the expansion chamber does, but it is part of it.
JETZcorp 1 year ago
@JETZcorp thanks for rep. the trick with a twostroke is not to get fresh charge in the exhaust in the first place because it is lost there. when you think of it any fresh charge would be mixed with exhaust and probably burning. you would not want that back in your engine and that wont up the power furthermore at this time the piston would be rising and driving out remaining gas. the function of a tuned pipe is to get more flow through the engine and that doesn`t happen by reversing the flow.
gilessmokey 1 year ago
@gilessmokey If the entire point was to improve flow, then they wouldn't add the second part of the chamber. The increased flow is caused by the diverging cone of the chamber, which creates a negative pressure wave and sucks out the exhaust. A long time ago, they just left it at that with a big "megaphone" pipe. But the second part of the expansion chamber is there to keep fresh charge in the cylinder. So the pipe does increase flow but then it also keeps itself from sucking out too much.
JETZcorp 1 year ago
@JETZcorp nearly there, but two strokes never used megaphone(one cone pipe). that was fourstrokes. the job of a pipe is to empty the cylinder quickly. an empty cylinder then encourages refilling by the carefully angled flow from the transfer ports this is done in a loop fashion directed away from the exhaust. this takes a little while but if the engine is run too slow or if the exhaust port is made too high some will be lost to exhaust. and that is why they tend not to perform well at low revs.
gilessmokey 1 year ago
@gilessmokey That's all true, and that is the function of the diverging cone of the expansion chamber. It creates a lower pressure at the exhaust port, which causes the exhaust gas to exit more quickly and for more air-fuel mix to come from the transfer ports. However, once the scavenging process is done, you've got too much air-fuel mix in the cylinder, and it starts escaping out the exhaust. That's where the back of the chamber comes in, to cram that back in.
The pipe does both functions.
JETZcorp 1 year ago
@JETZcorp once fuel is in exhaust it is lost, it happens that is why twostrokes use more fuel and emissions are up. the trick with a twostroke is to keep fuel out of exhaust in first place. it would not be possable for a pipe to extract then cram back and to get it right at various revs.nor desirable for reasons mentioned earlier. thankfully there is direct fuel injection which eliminates this problem, and ups performance.why we have not seen much of it i don`t know.
gilessmokey 1 year ago
@gilessmokey Well, it would appear you are arguing against a fairly well-respected authority on the subject, namely Gordon Jennings. And who says it's lost because it's mixing with exhaust? Who says that once air-fuel mix passes that magical point of the exhaust port, it suddenly HAS to mix with exhaust gas and be unusable?
The main thing that positive pressure wave does is keep fresh mix from passing the exhaust port, but at some point, according to Jennings the flow is momentarily reversed.
JETZcorp 1 year ago
@JETZcorp i will now let the readers make their own minds up. you can trace the tuned pipe back to ww2. late ww2 germans were sending us brits doodlebugs, flying bombs powered by pulse jets (tuned pipes with no moving parts producing pulse thrust). after the war it was east german mz motorcycles that first used tuned pipe to extract more power from their 2t racers, other twostrokes could not compete.i`m told suzuki collered mz engineers and technology spread. is that in book?
gilessmokey 1 year ago
@gilessmokey The book doesn't really give all that much history, it's mainly focused on explaining how things work and how you can expect things to change when components are modified. I have heard about Walter Kaaden from MZ, though.
JETZcorp 1 year ago
are these reeds only in 2 stroke engines or are they also in 4 stroke?
FordsRule351 2 years ago
4-strokes have cam shafts and valves.... not reed valves but like metal valves that open and close
xGSxMayhem94 2 years ago
This is only in a reedvalve 2-stroke, most are plain piston ported.
Antipwnsurmum 2 years ago
This has been flagged as spam show
my ts runs backwards any help or advice how to fix it ?
jakethepeg1066 2 years ago
I think you did a great job explaining, on your videos I think you should kinda build a script of how you want to talk about the process. You did a little to much thinking and not enough talking on this.
Overall you got my 5/5 rating! Thanks!
flamerail 2 years ago 2
Well good for you.
HondaH100A 2 years ago
This has been flagged as spam show
Fuck this bullshit!!!
Zebidyah 2 years ago
wow, AceOfSpadesPRO01 seems to be a huge asshole. thanks this video helped lots.
TheNovafan 2 years ago
Anndd,, It has an air tight seal here, here aannnddddshhhhh....... ermm here here n here n here n everywhere's air tight.. Anyway as the piston goes down -6 second pause- it takes the fuel and tried to push it back out through the ermmm the fuel and air charge tried to push it back out,,, ... Ahahh man thats funny shit.. I'll try not to remember this.. I'll wait for some1 else to upload another reed valve explanation vid up and i'll learn off that 1.. That engine looked wierd.
AceOfSpadesPRO01 2 years ago
I suggest you make a video of your own. I Have 1.7 million views. What you got mate?? Not Jack Shit. That is American for Nothing mate. Stick to trampoline bikes, whatever the hell that is. RH DSD
DIOSpeedDemon 2 years ago
hahahahaha great come back keep up the good vids
Paulstathis1992 2 years ago
@DIOSpeedDemon what the hell is a trampoline bike?? lol
robbiebobbie111 1 year ago
@AceOfSpadesPRO01 come on guys ... we all know that this explanation sucks but who cares anyway....
MilanM85 1 year ago
@AceOfSpadesPRO01 Having trouble understanding? Maybe it would be easier for you if you focused on the subject instead of concocting your next overdone unsult.
60spastlife 1 year ago
haha "then the spark plug explodes"
it makes sense if you already kno what he's talking about. its like fill in hte blank lol
Fu3LTheBurn 2 years ago
How stoned is this guy,hes like erm erm oh yeah, no thats not right ,yeah i know
spliffitupp 2 years ago
yeah the reed catches the intake spit back on the intake stroke wich makes a big diff in the low, weld on a 125 honda reed system, band saw the entire intake of the cylinder and weld it on, now your talking way better top end.
sirlordwest 2 years ago
v force 3 .. all the way baby
paymeebtch 2 years ago
hahaha so it wants to suck something
thats what she said
xNCKxKrusty 2 years ago
Maybe you would be able to concentrate if you turned down the music.
imsorryimbleading 3 years ago 18
lol
hellzone100 3 years ago
arent all valves 1-way ¬_¬??
RallyMotoXfan 3 years ago
no ball valves can go both ways, butterfly valves. float valves etc...
WC9456 2 years ago
Uhhhhhh, uhhhhh thee uhhhh, ummmmm piston, uhhhhhh..... He sounds like obama!
Just playin man, at least you have something helpful to say. :-)
jlsparky7 3 years ago
i got carbon reeds:P
tomimx80 3 years ago
man, this guy dont know what hes on about
idiotwithabigun 3 years ago 2
Piston goes up draws fuel/air mix thru the reeds into the crank case below the piston the piston comes down compresses the mixture the reeds close. as the piston goes further down the compressed mixture is blown into the cylinder as the ports are uncovered simple :)
MrGuvEuroman 3 years ago
what is that cool thingy in your hand :D, i want one
qcampbell123 3 years ago
that thingy is an ink pen refill with a little rubber cap on it,I just painted the clear cap, bright orange. RH DSD
DIOSpeedDemon 3 years ago
sweet
qcampbell123 3 years ago
It's amazing that the 490 Maico got so much more horsepower than any other open-class without using a Reed Valve. I mean, Husqvarna was using them in '77, maybe earlier, but Maico waited until after '81 (or later!) and still had more power, and smoother power than the competition. Amazing.
JETZcorp 3 years ago
dude , slow down , im trying to write all this down.
gsk312 3 years ago
lol
77toyota 3 years ago
lmao
qcampbell123 3 years ago
You should take a hit before you start recording. Just a thought!
hdl13 3 years ago
@hdl13 Dont be a Bogart! Share!
DIOSpeedDemon 1 year ago
@DIOSpeedDemon I think he took at hit right before he started talking. LOL A friend with weed is a friend indeed.
TheHortond 1 year ago
I have a reed that does 20,000 rpm :D
jabob98 3 years ago
oh yeah, well mine does 9,000,000,000 rpm
qcampbell123 3 years ago
hay i just telling u if use want to put nos on a little engine like this its not a good idea because u should have fuel ingestion to get the most out of the nos.y is this u mite ask its because air changes in the block/cylinder and with a carb u can't get that because u will always have a rich miture of fuel and air and wen u try to use nos
superpushy 3 years ago
when u use nos, u also add fuel, u spray in both.
so regardless of carb size etc the mixture is decided by the actual nos system when it is running.
Bare in mind the nos is basically the oxygen, extra oxygen needs extra fuel, so both r added.
IE, u have to have a fuel pump to go with nos and fuel injector and nos injector, or both with a premix chamber, not exactly sure but thats how they work.
U cant just add nos by itself to get more power.
tpvalley 3 years ago
thx a lot. Im looking for videos that help me to explain my polytechnics students in automechanics
villatalipot 3 years ago
Educated me a-bit, Thank You brotha'!
democracymontano 3 years ago
great explanation.
NAPALMJUNKY 3 years ago
at 2:12 ther called transfure ports.
yamahabansheerider 4 years ago 2
there transfure ports my friend.
yamahabansheerider 4 years ago
nice CT Black manifold lol
viper4shane 4 years ago
this is why 4 strokes are better on gas. some of the fuel and air mixture can escape through the exaust port before the full compression starts
1skiinIan 4 years ago
i can see what you are saying but it is not the main reason. some mixture does escape through the exhaust port but a good expansion chamber will ram most of it back in again at optimum rpm. a 4 stroke engine has an intake cycle (where it draws in mixture) starting every 720 degrees. a two stroke engine has one starting every 360 degrees. therefore twice as many intake strokes = higher fuel consumption.
supaquickgpr 3 years ago
I am trying to put my two-stroke thoughts in laymans terms, with the limited understanding of a beginning two-stroke theorist. I actually know very little about this new hobby of mine. ANY advice you could give would be greatly appreciated. RH
DIOSpeedDemon 3 years ago
Randy, why do you have a book on the table titled "How to install Nitrous"? What haven't you been telling me? Heh heh...
Bakayaro17 4 years ago 2
I have been thinking about it , mate. NOS actually has a moped/scooter nitrous kit for about 800$. With all the belts and pulleys instead of gears, I dont know if nitrous would be too much on them. It would look kinda cool with a big red ignite button, on the dash.
DIOSpeedDemon 4 years ago