Two Stroke Reed Valve Explained in Detail
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- Опубликовано: 9 июл 2024
- In this video, I explain the function of a reed valve and the issues you might have with them when servicing your dirt bike. I also talk a little bit about some of the performance aspects you can achieve with a reed valve.
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Moral of the story: no one likes loose flaps. Swap when warn out.
Great vid!
But 5 speed boxes feel great
so you will be disassembling them after every ride i suppose to check??
Thanks for helping me understand reed valves!
fantastic work buddy. excellent video. thank you for not drowning it out with music ill definitely be checking out your videos.
Definitely informative!
Bro such a knolageable video and I got a answer I was looking for thank you very much 🙏
Great description really appreciate
Excellent presentation sir! As a newbie, I could understand it all!
Great video!
Great video very informational
Watched a few videos about these things your video is definitely one if the better explanation thank you.
Very useful. Thanks for sharing
If you can see air you're probably on mushrooms.
I see it all the time next to my woodstove. . . wavy lines. Not wavy gravy.
Lol I read this right as he said it
Lol!
Yea....about that
Just density variation in the fluid flow due to a temp difference
Good video Man, keep it up
Appreciate that!
I’m new to this so...great video
Well explained. I had no idea how these things work. Now I gotta find a video about exhaust valves
Great vid man thanks
Nice information.. owning a 1998 Yamaha RX 100 .
Thank you 💖
I like how you said you were rebuilding this engine you called it an engine each time you referred to it I hear so many people call an engine a motor and an engine is internal combustion (gas) and a motor is electric!!! Good video you know what your talking about
I hate to kill your purist ideology but an internal combustion engine may be referred to as a motor. If the term "motors" were electric specific and "engines" were automobile specific then I wouldn't have the motor functions I need to run specific engines in trading card games.
1.machine or device that converts any form of energy into mechanical energy, or imparts motion.
My Cessna 182Q has an O-470-U/TS (opposed 470 cubic inch reciprocating 6 cylinder on 100 octane fuel) manufactured by Teledyne Continental Motors. Outboard boats have, outboard motors of the 2-stroke & 4-stroke flavors
I concur sir. So many people even mechanics do not know the difference as you can see by there reply's. However it looks like only three people still do not know the difference. Maybe this will help them understand. The word engine derives from Old French engin, from the Latin ingenium-the root of the word ingenious. Pre-industrial weapons of war, such as catapults, trebuchets and battering rams, were called siege engines, and knowledge of how to construct them was often treated as a military secret. The word gin, as in cotton gin, is short for engine. Most mechanical devices invented during the industrial revolution were described as engines-the steam engine being a notable example. However, the original steam engines, such as those by Thomas Savery, were not mechanical engines but pumps. In this manner, a fire engine in its original form was merely a water pump, with the engine being transported to the fire by horses.[3]
In modern usage, the term engine typically describes devices, like steam engines and internal combustion engines, that burn or otherwise consume fuel to perform mechanical work by exerting a torque or linear force (usually in the form of thrust). Devices converting heat energy into motion are commonly referred to simply as engines.[4] Examples of engines which exert a torque include the familiar automobile gasoline and diesel engines, as well as turboshafts. Examples of engines which produce thrust include turbofans and rockets.
When the internal combustion engine was invented, the term motor was initially used to distinguish it from the steam engine-which was in wide use at the time, powering locomotives and other vehicles such as steam rollers. The term motor derives from the Latin verb moto which means to set in motion, or maintain motion. Thus a motor is a device that imparts motion.
Motor and engine are interchangeable in standard English.[5] In some engineering jargons, the two words have different meanings, in which engine is a device that burns or otherwise consumes fuel, changing its chemical composition, and a motor is a device driven by electricity, air, or hydraulic pressure, which does not change the chemical composition of its energy source.[6][7] However, rocketry uses the term rocket motor, even though they consume fuel.
A heat engine may also serve as a prime mover-a component that transforms the flow or changes in pressure of a fluid into mechanical energy.[8] An automobile powered by an internal combustion engine may make use of various motors and pumps, but ultimately all such devices derive their power from the engine. Another way of looking at it is that a motor receives power from an external source, and then converts it into mechanical energy, while an engine creates power from pressure (derived directly from the explosive force of combustion or other chemical reaction, or secondarily from the action of some such force on other substances such as air, water, or steam
@@Badwolf6466 Ever hear of the Ford Motor Company, General Motors Company, American Motors Corporation, The Department of Motor Vehicles, and on---
@@182QKFTW Ever hear of Wikipedia ?
Cool Video, I bought some boyseen reeds. Do I leave the stock reed stops or should I install the small ones that the reeds come with? Thanks. Keep on making videos
Going to check if the reed valves are the problem on my Mercury boat engine. Thanks!
Love this
New to 2 stroke good info thx.
Jawas and MZs have a really tall piston which covers the inlet port on the down stroke so you don't need a reed valve.
Very informative vidieo,ive learned alot from watching ur content,and how you give tech info is also great.most say just google it under manual specs.you are so much more thorough. Hey was just curious.i watched the 125 rebiuld all the way thru.is the reed valves replacing what normal hard overhead valves would be doing.because i didnt see a cam or chain going to valves.the only thing i see is reed valves n exhaust power valve.im new to this two stroke stuff!!snooky pa.just got a 94 jet ski recently.was looking at a 125 bike too.
Well done!
Good explanation
Nice job
I've just rebuild a 100cc 2 stroke and have used performance reeds, what I'm wondering is will I need to change the main jet to 1 size bigger?
Hi, i have a old Stihl weed whacker "no Reed valves" and after replacing all the seals ect for the "vacuum" section, it still wont work right as skirt to bore clearance which is supposed to me Max .152 mm is more than that. So this loose fit not only dont provide enough suction build up but also the sliding skirt past the inlet port not seal well like a reed valve would and the port and pulse line be almost zero as it seems to be when i test it?
Good stuff thanks
Very useful video
Thank you very much, more to come!
Good video...
What would it sound like on a twin?
Very interesting :-)
thank you.
Do you know how to get a Reed vavle off a 2stroke scooter that is not just coming off easy
Yes I have an old leaf blower with a single reed flap and it is steel or aluminum.
I've searched high and low but everyone has a different saying on this.. maybe you know..
Is it possible to convert a Yamaha four stroke f9.9 into a 15hp by swapping the reed valve from a 15hp one?
I heard it could be done, but I'm concerned about timing, air/fuel mixture not being the same with the new reed valve..
Doesn't a boost bottle help do the same thing?
Great series Sir!
Thank you very much!
Nice i have a 1997 c125 first aluminum frame gen.... and iam going for a total rebuilt, also a 1982 atc 250r going for frankenstien mode total restore !
1998 was the first year the 125 got the aluminum frame.
I like loose flaps but tight flaps are probably better.
I have a 50 horse Yamaha the bottom cylinder has a chirp what causes a chirp all the cylinders 150 lb of compression
My yz125 idles but when I put it into gear I can ride it for 200ft before it’s sputter and stops, could the reed valves be the issue? I just did a carb rebuild and top end rebuild.
something wrong with your carb I'd think. guessing you fixed it now though
Wouldn't the reed valves open up every other rotation?
Hi man, do you usually place a gasket sheet under the reed valve? Like in between the engine and reed valve?thanks
Depends on the model of bike. Some engines don’t have a gasket
Hey bud jus got this kart i no semi basics of engines..its f1 kart with 98 cr 125 2 stroke and was raced n dallas area where its huge in tx ..neways i got it of a trade and have a spare what he said was 97 cr125...i wanna do my first ever rebuild and thank i can do it..deff need some help.......id post pics but cant on here..
Sure what do you need help with
Subscribed! I have a 2 stroke scooter with stock parts. Nothing was changed. What will be the effect if I change the reeds from stock into carbon fiber, like a polini petal? Will it give a significant boost in power, acceleration, speed etc or am I better of with stock reeds? Thank you
Probably wont have much of a noticeable difference. Maybe idle a bit smoother but that's about all
do reeds make it faster?
❤️
Got a cr125 and the carb is dumping fuel from the overflow and running really rich. What could cause that? Already cleaned the inlet needle/float and the pilot jet. Any recommendations?
Is your float at correct height setting or getting stuck?
Doesn’t seem to be getting stuck, haven’t checked height yet
what was the problem? i have the same problem whit my tm 125
Thank Frank.
Needle and seat worn or something stuck in it
how about just to not install it at all? - i had 2 stroke bike 30 years ago- there was nothing between carb and engine intake
Are Reed valves universal?
Is it normal for reeds just the reeds them self to be 44$ a piece I live in Canada New Brunswick and their 44$ a piece and I wanted to know if that was normal I'm doing some stuff on my 2005 cr85 like beakes new carberator stuff like new main and pilot jet new tire later down the road and I need a new reed and I asked someone who can order them for me and he said they where 44$ and I said are you sure they are I didn't want to believe him but later on that day I looked on Amazon and they where more then that again this is my first time really doing any updates to the bike so i wanted to know if this is mormal my dad knows alot about bikes but the last I'm he did anything to a 2 stroke was like 20 years a go when they where still 25 to 30$ so if you think this is a normal price plz tell me
Sounds about right
@@adampaganelli4891 thx Adam for replaying and thx for letting me know that is the normal price for reeds keep up the good work the cr125 build is coming together very nicely
I bet they also serve to cut some sound too
No wonder my reed already died after a month or two..
Mine took 15000 rpm, but shouldn't be a problem since it was included in a tuned cylinder...
Anyone got a cr125 fuel ⛽️ tank forsale 2003 ??
If it's ruined the bike might backfire often too. My friends bikes caught on fire because of bad reed
Crazy. I made the mistake of kicking over a little polini 50 without the carburetor on and apparently there was enough fuel in there to start it and it shot a bunch of a fuel backwards out the Reed valve. Luckily did not catch fire
@@thooke222 Yes it was lucky. On my mates 250 with cracked reeds it backfired and sent flames into the airbox & that's why it set alight. when we was trying to bump start her she just kept spluttering & backfiring really loud. All the best. stay safe.
I agree with Zoopers. I 've wondered about them for a while. You didn't explain 2 stage reed valves, or am I giving away my age if they're not used anymore? Are all reed valve manufacturers accomplishing different flow parameters with " THEIR PROPRIETERY" materials and manufacturing? I like your articles and want to get another 2 stroke. I'm sure they have advanced a lot since the 70's. Oh no I told :)
I remember the 2 stage reed valve setup back in the day. I used to do some hill climbing et al back in the day with a Maico 501. That thing was a beast and you had to respect it or you would get hurt. I never got hurt. ;) I loved the 125 because you could jump and toss it around easier with some finesse. Always wanted to be a Trials rider too. Good times. :)
AAAAAA-HA!!!! ,,,,THAT'S WHY I EVENTUALLY NEEDED A NEW PISTON ASSEMBLY!!! ....I had changed my reed valves but was not thorough in cleaning the engine = the result of my negligence only cost me one or two hundred bucks ...BUT IT COULD HAVE BEEN MY LIFE!!!
+ today
one important question has been left aside: _why is the valve called Reed_ ?
Sees air 😵💫
All 2 strokes have reeds?
Only 2 stroke dirtbikes
No
Mcguyver
the most exciting part of 3d printing and mechatronics is that you can now make your own bikes at home!!!
Brrrrrrraaaaaaarp
Who’s here for there automotive high school test
I make that from plastic bottle for 50cc Cpi sm , it runs fantastic but just 20mins 😂😂
Hahaha that’s impressive it work at all
Not flaps......pedals.
Not pedal. PETAls
You sound like data from star trek. Are you like incapable of using contractions or something?