Exactly what I needed! You fixed a problem I didn’t know I had with the full throttle issue haha. Came here for idle issues left with full throttle! Nice
I helped the development with the PWM. In karting, in the early 1990's the "top" carb was the Del orto 39 JM racing was selling for a small fortune. But, they didn't show you their set up as it was a very complicated carb. Keihn was pushing their PWK for Karting. The fuel on the PWK dropped out of atomization too quickly when you got off the throttle and it took too long to get back to atomization when you got on. The PWM was close to being a flat slide, but retained the radius on the front of the slide allowing the fuel to "cone" into the crankcase and keep the fuel in an atomized state more adequately. The radius on the back side of the slide allowed the main circuit to be closer to the piston then the PWK. That was the basis of the first PWM carburetor. Our GP 125cc roadracing team was a close to the Keihin USA so they showed up one day to check out the shop. They discovered I had been EDMing their 36mm carbs to an oval"ish" shape and patching up the holes where the EDM burnt through! We had set the 125cc A Gas and B Gas land speed records with one of those carbs! And after showing their tech why it worked on my Flow Bench...well, that's how our short collaboration began. In the late nineties I went back to school and finished my physics degree. I miss the 125cc scene. It was fun testing all of the modifications. I have heard there are no more modifying 125 CR engines. That is sad to hear. The Honda was a bulletproof platform. There is a lot of horsepower begging to come out of that engine.
Hello sir, maybe you can help me with a simple doubt. I got a Vortex 125 engine which was used in competition some years ago, along with a Mikuni slide carb type. I want to swap this carb for a CV carb type to have a smoother throttle response. Could you mention some of the models used in 125 competition karts? Best regards
@@designspm The vortex engine uses a relitivly small 30mm carb due to the engines effeciency. Give any dealer a call and they should be able to get you the correct carb and set it up properly. When I was racing we ran Honda 125's with PWM 38's. But the new Vortex is a different animal.
@@stevesolo16 hello sir, which of these three carburetor: PWK, PWM, PJ has the potential to have the highest top end power? assuming the size of the venturi is the same... Things related to response, idle, and others are ignored
I EDMed a 36 and 38 Keihn I I used Morroso putty to fill in the places where the holes poked through. I then grounded the excess putty. They both worked, but not liked we hoped. The PWM worked right out of the box. The trick to make the PWKM sing is to use a needle from the old Honda RS 125 The 94 and 95, to the best of my relocation was the needle I used. I miss the 125 scene too. It was what racing is all about!
Great video bro been working on a 36mm pwk just got it back in a 22 beta rr (pain in arse to get out) then watched your video, thought no way going to have to take it off again which would’ve been a major pain in arse but listened for that metal on metal at the top and thank god it made the right sound😅, never even noticed that notch too worried about getting the float level right as it was pissing out fuel before, plus the oil injected thingy majig put back right,😅 but yeah keep making content, straight to point no messing keep it up my American brother 🇬🇧🇺🇸 Jamie
A lot of great info for the inexperienced mechanic. I'm learning as I go. I just cleaned the carburetor yesterday, and the first tip, very helpful. Perfect straight forward video.
Carl, Swedetech has a really good rep. If they are racing and winning, take heed, stop and listen. The world is full of followers. If you are in need of answers go to the people who are running in the front of the pack. They found resolve by figuring out problems first hand. Cheers!
Thank you so much for this video. I spent hours trying to troubleshoot my YZ250 carb because it wouldn't idle.In the end I had to turn to youtube. It turned out to be the little rubber boot had slid up. After sliding it back down, the bike would idle correctly and the idle adjustment screw worked as it should.
Quick question , any washers or o rings for the needle jet that’s in between the slide ? Or just put in the hole and top piece screwed on ? For a 04 RM250 pwk. Just replaced the needle on the slide and don’t know if it needs o rings or washers
Hi Jason, Thanks for the tips. Great stuff! I have a 1983 Honda Express Business Moped. Keihin Carb gave me endless trouble.Yoyr tips helped me adjust my old carb just great:) Phillip Bela Bela South Africa
Awesome Video! That helped me alot , especially the Choke Rubber Grommet Tip because i assume that i have this exact Problem and wondered why it was weird to Setup ! And i also had a Weird Problem that the Choke Moves itself DOWN out of the UP Position when the Engine gets Warm - and then Shutting off... I then adjusted the Fuel / Air and Idle Screw a bit and it seemed to Work but i now have Bog if i Full Throttle Quickly , and if i dont Quick Full Throttle it run's Great (it's a Derbi Senda Polini Sport 80cc and 24mm PWK / 6 Leaf Polini Carbon Membrane)
Excellent video. I have an issue with fuel leaking from the overflow. Is there an o ring around the needle valve seat on these carbs? The brass seat doesn't look like it comes off. Regards Matt
cart racing so much different than enduro bikes..my bikes throttle cable has to have a extreme radius into carb..no room!..and WOT not really used as often in trail riding at low speeds..but great info on carbs! obviously youve spent alot of time tinkering with theses bad boys!
For the tight clearance, Motion Pro makes a nice 90 degree and 45 degree cable. When using this style cable, you always need to double check correct slide operation when removing and installing the slide and slide top. It is very easy to accidentally change slide travel when threading directly into the cap. Thank you for the feedback, we have been working extensively with these carbs since the 1990's.
I have a 28mm Kelhin PWM carb, and it is mounted close to vertical? Is that a problem, because my engine placement is so narrow so that is the only way it'll fit.
The carb is designed to be placed vertical, with the floats at the bottom. The more angle you have away from vertical towards horizontal, you will run into carburation issues. Based on your description, it sounds ok. The carb also wants to be as straight as possible when it comes to the tilt when looking at it from behind.
@SwedetechRacingEngines Great information! I have a PWM 38 that keeps leaking from the overflow, any thoughts? I haven't even pulled the bowl off yet to look.
Very Nice videos, Do you have any chart or table to select the best (or lest worst) the jetting of the carb in swedetech engine?? Another question. Why when i tune (jetting) the carb, then, i fire up the kart in the "sicssor bench" everything sounds perfect and work well, then, i get in the kart and kart has so much trouble to fire up. thank you!!!
@@Swedetechracing - maybe develop some videos on blueprinting or development work on the SKUSA 20.3.2.1 CR125R engines and the IAME X30 TaG engines. For example, are you allowed to perform grinding and polishing on the cylinder to bring those dimensions to those listed on page 3 of the TaGX30 rulebook ?
For any type of racing, always read and know the rulebook before doing anything. If there is a question on a rule or interpretation, always contact the head tech director in writing to ask for clarifications. Creating engine building content that educates someone on engine building is a tough proposition for Swedetech. Our business model is to provide those services at a high level and quality. The videos we provide start with the most frequently asked questions in which we expect the customer to be able to perform.
The one if the video does not have a pre-machined boss for the the oil injectors. You may be able to find one that is off an OE application with the proper set up for oil injection appliations
What about if you can't find the idle, but the engine starts every time when you crack the throttle?? I have my idle screw all the way in, and still can't get it to idle.... 2 screws on a/f tried different pilot jets, but I think I'm still rich??
I have an 06 cr125 and it has a temperamental idle. I have the adjuster turned waaaay out, sometimes it idles great other times it hangs and can make for some sketchy moments
Clean your carb, check your jets, check your slide spring, and make sure the slide is functioning properly. Also replace your throttle cable and housing if needed. Idle should not change in the middle of a ride on it's own. If you are not comfortable with the inspection of your carburetor, we offer the service.
Swedetech Racing Engines the bike is in pieces currently for a build im doing. Thanks for the advice. The bike runs super crisp just seems like the idle adjuster isnt affecting anything. Ill check the slide and the throttle cable tension.
I have a problem with my KTM 250 2T The tool has not been used for almost a year This week I found time to take care of it, I did a fuel-oil change, I cleaned the filter plug, everything, finally I tried to start it, but the car could not start. It only started with carburetor spray and shut off straight away From that I understood that the carburetor needed to be cleaned and that's how I did it. Now the problem is different, the motorcycle drives straight up to very, very high turns I played with the air-fuel screw but unfortunately it didn't help. Is there a situation where the problem is different? Something in the carburetor maybe? need help pleases tool,
This video was made primarily for our karting industry clientele in a 125cc configuration. Your situation is a little bit more out of my experience, the only company in the motocross world that I know of is JD Jetting. I recommend you reach out to them as they have more experience with your application.
hi ive been looking in the internet where i can buy this authentic keihin but most of the time i see fake one, so i wounder if i can some tips from here.
We sell only Keihin mfg carburetors. If you visit www.shopswedetech.com/home.php?cat=44 you will see our selection. If you are looking for a OE Bike carburetors, those will have to be special order and you can send us an email to clarify your needs and we will offer you a quote. We do not sell or carry the chinese knock off models
I have a keihin PA MOA on a 1980 Indian moped and when i apply the rear brake it dies if i dont apply the brake it idles ok. What could be the problem? Anyone know? Thank you
Sorry for my silly question, but I am confused a little. I have an old timer boxer engined motorcycle with two Keihin PWK 28 carbs on it. Obviously there is an idle screw and an air/fuel mixture screw on it. The question is: With the air/fuel mixture screw turning it in and out...so turning it in is getting richer and turning it out is getting leaner? Is this correct? Thanks for the answer, and forgive my english Greatings from Hungary Attila
The PWM is not a better carburetor for all applications. For shifter kart racing on small grand prix tracks, we prefer this carburetor for our 125cc unrestricted Honda CR125 applications. We do use the PWK for dirt oval type (speedway) kart applications.
Hi friend, I have a yz 250 99, and it has the carburetor pwm38, could you take me some doubts of regulation? it is consuming a lot of fuel, not slow idle, which gicles do you recommend I use?
Hello and thank you for watching our channel. We do not offer fine tuning or generalized tips for packages we are not familiar with or have not serviced. We do not want to lead you down the wrong path with bad info. These videos are designed to give an over view of a product or service.
I have the same bike and the same shitty carb it's running really rich and won't idle in high rpms and it bogs alot if u had these problems please tell me what you did to fix it
You send us the carburetor for a proper cleaning and rebuild service. If you are having problems, it is better to have a good starting point. Otherwise you can start by changing jets and needle clip position to see if you can resolve the problems on your own.
Without getting into the deep specifics, physical differences include different body and throttle bore lengths, slide designs, and internal fuel circuits are different. The PWM has a throttle / idle circuit combined. The PWK it is seperate. Generally the PWM carburetor works well with engines that require throttle response and power from the mid range to the top end. While the PWK with the longer carb body tract favors an engine or application that requires better throttle response on low rpms and throttle position. In karting, we use the PWM and PWK on the Honda CR125 engines adapted to sprint kart and enduro racing. Most favor the PWM for the power deliver range for that application. Many of our oval Outlaw Kart or Unlimited All Star karts prefer the use of the PWK for low end advantage.
Khairul, I posted a brief comment on the practical reason why the PWM made its way into the world of 2-stroke racing. I don't feel the desire to share the physics behind the original circuitry in a blog style forum. However, I think the answer to your question should be satisfactory in my brief post. Cheers! BTW: the name Khairul means; a man with an unending reach for knowledge. In the world of racing I think your parents were wise beyond their formative years! I'm guessing the next great Muslim or Indian racing legend will be named Khairul, or Khairul Jr. What due you think???😉👍🏆🎉
The choke has a built in idle circuit. If you look at the top of the choke valve, it has an arrow indicating open. Turn the knob clockwise until it stops, this is closed. Rotate counterclockwise 30 clicks. Start there for idle. If you are between 30-40 clicks and you still don't have idle, move to the pilot jet. If this doesn't work for idle, contact a local reputable shop familiar with tuning your particular engine and application so they can give you a baseline on jetting
@@dariofornaca4740 start turning the choke knob and you will feel and hear a click about every 60 degrees. Twist it clockwise till it stops and then turn it counter clock wise, listen and feel the clicks - count 30 clicks - and that is usually when you start getting an idle.
@@Swedetechracing Thank you for the advice, i've another one question, if I don't get an idle i have to increase or decrease the pilot jet? (I think decrease but I'm not sure)
The idle circuit isn't independent on this carburetor, it is built into the choke circuit. For our racing applications, we do not use the idle function, but we have some customers that do. In order to have the carb idling, start your air screw 1 turn out. Then, turn the choke knob clock wise until it stops. This is fully closed. Next, turn the chock knob counter-clockwise to 30 clicks. If it still doesn't idle, open in 5 click increments. If you are between 40-45 clicks with no idle, check to see if your jetting is correct for your riding conditions and re-try.
My slide has a bit of play and makes a click noise if i press on it or open throttle a tiny bit. Is this normal? Heres a video of the issue. m.th-cam.com/video/MPImlaggGZE/w-d-xo.html
4 minutes to talk about two little details on a carburetor. The other 6 minutes and 36 seconds were spent mumbling about caffeinated shaking hands, camera focus, and shit that doesn't matter. Cut out the BS and your videos will have more views. But hey, I guess Swedetech doesn't make its money from TH-cam. It makes it from it's expensive parts. P.S. I love my fuel system for my cr125. It works wonders and has never flooded. Oh, my flywheel cover is sick too.
We appreciate the feedback. We will continue to work on our quality and content of our videos. Regarding expensive fuel systems, talk to the racing associations who make the rules. The GFS was developed to fix a major problem karters face by being forced to use parts and equipment for motorcycles.
I don't care if Jason is caffeinated or even methed out of his damn mind; he and Reine been a huge help to me personally with my karting journey. Quality and service always worth paying a little more for, and the best of the best normally goes hand in hand with quirkiness in any category in business or life.
Exactly what I needed! You fixed a problem I didn’t know I had with the full throttle issue haha. Came here for idle issues left with full throttle! Nice
Mee too! Thanks
I helped the development with the PWM. In karting, in the early 1990's the "top" carb was the Del orto 39 JM racing was selling for a small fortune. But, they didn't show you their set up as it was a very complicated carb. Keihn was pushing their PWK for Karting. The fuel on the PWK dropped out of atomization too quickly when you got off the throttle and it took too long to get back to atomization when you got on.
The PWM was close to being a flat slide, but retained the radius on the front of the slide allowing the fuel to "cone" into the crankcase and keep the fuel in an atomized state more adequately. The radius on the back side of the slide allowed the main circuit to be closer to the piston then the PWK. That was the basis of the first PWM carburetor. Our GP 125cc roadracing team was a close to the Keihin USA so
they showed up one day to check out the shop. They discovered I had been EDMing their 36mm carbs to an oval"ish" shape and patching up the holes where the EDM burnt through! We had set the 125cc A Gas and B Gas land speed records with one of those carbs! And after showing their tech why it worked on my Flow Bench...well, that's how our short collaboration began. In the late nineties I went back to school and finished my physics degree. I miss the 125cc scene. It was fun testing all of the modifications. I have heard there are no more modifying 125 CR engines. That is sad to hear. The Honda was a bulletproof platform. There is a lot of horsepower begging to come out of that engine.
Hello sir, maybe you can help me with a simple doubt. I got a Vortex 125 engine which was used in competition some years ago, along with a Mikuni slide carb type.
I want to swap this carb for a CV carb type to have a smoother throttle response. Could you mention some of the models used in 125 competition karts? Best regards
@@designspm The vortex engine uses a relitivly small 30mm carb due to the engines effeciency. Give any dealer a call and they should be able to get you the correct carb and set it up properly. When I was racing we ran Honda 125's with PWM 38's. But the new Vortex is a different animal.
@@stevesolo16 hello sir, which of these three carburetor: PWK, PWM, PJ has the potential to have the highest top end power?
assuming the size of the venturi is the same... Things related to response, idle, and others are ignored
I EDMed a 36 and 38 Keihn I I used Morroso putty to fill in the places where the holes poked through. I then grounded the excess putty. They both worked, but not liked we hoped. The PWM worked right out of the box. The trick to make the PWKM sing is to use a needle from the old Honda RS 125
The 94 and 95, to the best of my relocation was the needle I used.
I miss the 125 scene too. It was what racing is all about!
Great video bro been working on a 36mm pwk just got it back in a 22 beta rr (pain in arse to get out) then watched your video, thought no way going to have to take it off again which would’ve been a major pain in arse but listened for that metal on metal at the top and thank god it made the right sound😅, never even noticed that notch too worried about getting the float level right as it was pissing out fuel before, plus the oil injected thingy majig put back right,😅 but yeah keep making content, straight to point no messing keep it up my American brother 🇬🇧🇺🇸
Jamie
Noticed this today. Great video
A lot of great info for the inexperienced mechanic. I'm learning as I go. I just cleaned the carburetor yesterday, and the first tip, very helpful. Perfect straight forward video.
Glad you found it helpful
Thank you!!!!! I could not figure out why my new PWK carb was sticking. I didn’t line up the notch on the spring. Saved me a trip to the shop.
Carl, Swedetech has a really good rep. If they are racing and winning, take heed, stop and listen. The world is full of followers. If you are in need of answers go to the people who are running in the front of the pack. They found resolve by figuring out problems first hand.
Cheers!
Thank you so much for this video. I spent hours trying to troubleshoot my YZ250 carb because it wouldn't idle.In the end I had to turn to youtube. It turned out to be the little rubber boot had slid up. After sliding it back down, the bike would idle correctly and the idle adjustment screw worked as it should.
Glad the video helped
Quick question , any washers or o rings for the needle jet that’s in between the slide ? Or just put in the hole and top piece screwed on ? For a 04 RM250 pwk. Just replaced the needle on the slide and don’t know if it needs o rings or washers
sorry wich rubber r u talking about? i have the same problem as u
Great video! Helped me out a lot. Getting wide open throttle now.
Glad you enjoyed it.
Hi Jason, Thanks for the tips. Great stuff! I have a 1983 Honda Express Business Moped. Keihin Carb gave me endless trouble.Yoyr tips helped me adjust my old carb just great:)
Phillip
Bela Bela
South Africa
Awesome Video! That helped me alot , especially the Choke Rubber Grommet Tip because i assume that i have this exact Problem and wondered why it was weird to Setup !
And i also had a Weird Problem that the Choke Moves itself DOWN out of the UP Position when the Engine gets Warm - and then Shutting off... I then adjusted the Fuel / Air and Idle Screw a bit and it seemed to Work but i now have Bog if i Full Throttle Quickly , and if i dont Quick Full Throttle it run's Great (it's a Derbi Senda Polini Sport 80cc and 24mm PWK / 6 Leaf Polini Carbon Membrane)
thank you so much I have same carburator im find the problem now is the choke
Excellent video. I have an issue with fuel leaking from the overflow. Is there an o ring around the needle valve seat on these carbs? The brass seat doesn't look like it comes off. Regards Matt
cart racing so much different than enduro bikes..my bikes throttle cable has to have a extreme radius into carb..no room!..and WOT not really used as often in trail riding at low speeds..but great info on carbs! obviously youve spent alot of time tinkering with theses bad boys!
For the tight clearance, Motion Pro makes a nice 90 degree and 45 degree cable. When using this style cable, you always need to double check correct slide operation when removing and installing the slide and slide top. It is very easy to accidentally change slide travel when threading directly into the cap.
Thank you for the feedback, we have been working extensively with these carbs since the 1990's.
How to set a carburettor to the cross? I have Yz 250. The candle is black. I do not understand what is happening with clicks
Okay hopefully someone will read this.
I'm taking apart my father's 50 year old bike, the piston is stuck and the cable does not budge.. any advice?
Thanks for the advanced tips :)
Thanks for sharing very helpful
Great content!!
Ok here's my problem were do you adjust the idle on the carburetor? Like you think it should be in the same spot like every other carburetor
Excellent video thank you
I have a 28mm Kelhin PWM carb, and it is mounted close to vertical? Is that a problem, because my engine placement is so narrow so that is the only way it'll fit.
The carb is designed to be placed vertical, with the floats at the bottom. The more angle you have away from vertical towards horizontal, you will run into carburation issues. Based on your description, it sounds ok. The carb also wants to be as straight as possible when it comes to the tilt when looking at it from behind.
@SwedetechRacingEngines Great information! I have a PWM 38 that keeps leaking from the overflow, any thoughts? I haven't even pulled the bowl off yet to look.
I know its been a year but have you solved the problem?
thanks for valuable info. good job!
Very Nice videos, Do you have any chart or table to select the best (or lest worst) the jetting of the carb in swedetech engine?? Another question. Why when i tune (jetting) the carb, then, i fire up the kart in the "sicssor bench" everything sounds perfect and work well, then, i get in the kart and kart has so much trouble to fire up. thank you!!!
Very good content and helpful.
Thank you. Glad it was helpful
@@Swedetechracing - maybe develop some videos on blueprinting or development work on the SKUSA 20.3.2.1 CR125R engines and the IAME X30 TaG engines. For example, are you allowed to perform grinding and polishing on the cylinder to bring those dimensions to those listed on page 3 of the TaGX30 rulebook ?
For any type of racing, always read and know the rulebook before doing anything. If there is a question on a rule or interpretation, always contact the head tech director in writing to ask for clarifications. Creating engine building content that educates someone on engine building is a tough proposition for Swedetech. Our business model is to provide those services at a high level and quality. The videos we provide start with the most frequently asked questions in which we expect the customer to be able to perform.
Does this PWM the possibility to connect the oil mixing tube?
The one if the video does not have a pre-machined boss for the the oil injectors. You may be able to find one that is off an OE application with the proper set up for oil injection appliations
Swedetech Racing Engines aha ok! Got it, thank you 🙏🏻
What about if you can't find the idle, but the engine starts every time when you crack the throttle?? I have my idle screw all the way in, and still can't get it to idle.... 2 screws on a/f tried different pilot jets, but I think I'm still rich??
I’m having the same issue on mine out of no where. Pretty sure it’s the block o ring. I’ll do a video on my channel soon, sub for info
@@Sleeper_Banshee yeah im good i figured it out. soemthing was stuck in the valve body
Same issue , have you tried the choke knob
Can you make a vid of how to instal this carb
I have an 06 cr125 and it has a temperamental idle. I have the adjuster turned waaaay out, sometimes it idles great other times it hangs and can make for some sketchy moments
Clean your carb, check your jets, check your slide spring, and make sure the slide is functioning properly. Also replace your throttle cable and housing if needed. Idle should not change in the middle of a ride on it's own. If you are not comfortable with the inspection of your carburetor, we offer the service.
Swedetech Racing Engines the bike is in pieces currently for a build im doing. Thanks for the advice. The bike runs super crisp just seems like the idle adjuster isnt affecting anything. Ill check the slide and the throttle cable tension.
Hi friend.can you give me advise?can i use keihini 42mm single for yamaha virago vx535?
Potresti fare un video dove spieghi il funzionamento del galleggiante?
check this video out: th-cam.com/video/vf4Ty6Yc9SY/w-d-xo.html
I have a problem with my KTM 250 2T
The tool has not been used for almost a year
This week I found time to take care of it, I did a fuel-oil change, I cleaned the filter plug, everything, finally I tried to start it, but the car could not start.
It only started with carburetor spray and shut off straight away
From that I understood that the carburetor needed to be cleaned and that's how I did it.
Now the problem is different, the motorcycle drives straight up to very, very high turns
I played with the air-fuel screw but unfortunately it didn't help.
Is there a situation where the problem is different? Something in the carburetor maybe? need help pleases tool,
This video was made primarily for our karting industry clientele in a 125cc configuration. Your situation is a little bit more out of my experience, the only company in the motocross world that I know of is JD Jetting. I recommend you reach out to them as they have more experience with your application.
hi ive been looking in the internet where i can buy this authentic keihin but most of the time i see fake one, so i wounder if i can some tips from here.
We sell only Keihin mfg carburetors. If you visit www.shopswedetech.com/home.php?cat=44 you will see our selection. If you are looking for a OE Bike carburetors, those will have to be special order and you can send us an email to clarify your needs and we will offer you a quote. We do not sell or carry the chinese knock off models
thanks.. ill go check it out
i check the site but you dont have 28mm size i guess.
I have a keihin PA MOA on a 1980 Indian moped and when i apply the rear brake it dies if i dont apply the brake it idles ok. What could be the problem? Anyone know?
Thank you
From when they put caffeine in whisky? :)
great video thanks
You are welcome
Sorry for my silly question, but I am confused a little. I have an old timer boxer engined motorcycle with two Keihin PWK 28 carbs on it. Obviously there is an idle screw and an air/fuel mixture screw on it. The question is:
With the air/fuel mixture screw turning it in and out...so turning it in is getting richer and turning it out is getting leaner? Is this correct?
Thanks for the answer, and forgive my english
Greatings from Hungary
Attila
Good information
hi !! why is better the pwm than the pwk... ?? pwm is better for hi rpms and pwk is better for mid range??
The PWM is not a better carburetor for all applications. For shifter kart racing on small grand prix tracks, we prefer this carburetor for our 125cc unrestricted Honda CR125 applications. We do use the PWK for dirt oval type (speedway) kart applications.
ok,thanks !!
Not sure if you will read this.... Would love some advice on my Pwk32 that I have on my NSR150RR.... 😉
Hi friend, I have a yz 250 99, and it has the carburetor pwm38, could you take me some doubts of regulation? it is consuming a lot of fuel, not slow idle, which gicles do you recommend I use?
Hello and thank you for watching our channel. We do not offer fine tuning or generalized tips for packages we are not familiar with or have not serviced. We do not want to lead you down the wrong path with bad info. These videos are designed to give an over view of a product or service.
I have the same bike and the same shitty carb it's running really rich and won't idle in high rpms and it bogs alot if u had these problems please tell me what you did to fix it
You send us the carburetor for a proper cleaning and rebuild service. If you are having problems, it is better to have a good starting point. Otherwise you can start by changing jets and needle clip position to see if you can resolve the problems on your own.
@@Swedetechracing I fixed it and and idles right and has power but now the carb pours gas and the bike floods itself
That is some great advice. I have a huge channel on youtube and did not know these tips and tricks. Thank you very much and Respect. RH DIOSPEEDDEMON
Thank you
Whats the different between pwk n pwm??any major.different?
Without getting into the deep specifics, physical differences include different body and throttle bore lengths, slide designs, and internal fuel circuits are different. The PWM has a throttle / idle circuit combined. The PWK it is seperate.
Generally the PWM carburetor works well with engines that require throttle response and power from the mid range to the top end. While the PWK with the longer carb body tract favors an engine or application that requires better throttle response on low rpms and throttle position.
In karting, we use the PWM and PWK on the Honda CR125 engines adapted to sprint kart and enduro racing. Most favor the PWM for the power deliver range for that application. Many of our oval Outlaw Kart or Unlimited All Star karts prefer the use of the PWK for low end advantage.
Khairul, I posted a brief comment on the practical reason why the PWM made its way into the world of 2-stroke racing. I don't feel the desire to share the physics behind the original circuitry in a blog style forum. However, I think the answer to your question should be satisfactory in my brief post. Cheers! BTW: the name Khairul means; a man with an unending reach for knowledge. In the world of racing I think your parents were wise beyond their formative years! I'm guessing the next great Muslim or Indian racing legend will be named Khairul, or Khairul Jr. What due you think???😉👍🏆🎉
@@Swedetechracing if we compare PWM to PJ, which one can potentially produce the highest top end power?
Hello i have exactly same carburetor. and i don't understand how you adjust idle on these.
Twist the choke knob counter clockwise about 25 to 30 clicks from fully closed.
Hi I have the pwm 38 on my yz how do you set them so the motor will idle. Any advice would be much appreciated
The choke has a built in idle circuit. If you look at the top of the choke valve, it has an arrow indicating open. Turn the knob clockwise until it stops, this is closed. Rotate counterclockwise 30 clicks. Start there for idle. If you are between 30-40 clicks and you still don't have idle, move to the pilot jet. If this doesn't work for idle, contact a local reputable shop familiar with tuning your particular engine and application so they can give you a baseline on jetting
@@Swedetechracing what do you mean when you talk about “30 clicks”?
@@dariofornaca4740 start turning the choke knob and you will feel and hear a click about every 60 degrees. Twist it clockwise till it stops and then turn it counter clock wise, listen and feel the clicks - count 30 clicks - and that is usually when you start getting an idle.
@@Swedetechracing Thank you for the advice, i've another one question, if I don't get an idle i have to increase or decrease the pilot jet? (I think decrease but I'm not sure)
@@dariofornaca4740 typically you would decrease the pilot jet.
Thank you..
Hi , is the pwm float bowl same as a pwk ?
You will have to look up the PWM model vs the specific PWK model that you have.
Yes I would lay off the caffeine a little bit.
Is this original keihin or china keihin?
This is an original Keihin we purchased from Sudco, so it is not original equipment. It is not the Chinese knockoff
How to purchase from sudco..?
contact swedetech - www.shopswedetech.com
Ty
Good carb
thanks
You are welcome. Thank you for checking out our channel
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I hate this carb on my YZ250. Just won't idle.
The idle circuit isn't independent on this carburetor, it is built into the choke circuit. For our racing applications, we do not use the idle function, but we have some customers that do. In order to have the carb idling, start your air screw 1 turn out. Then, turn the choke knob clock wise until it stops. This is fully closed. Next, turn the chock knob counter-clockwise to 30 clicks. If it still doesn't idle, open in 5 click increments. If you are between 40-45 clicks with no idle, check to see if your jetting is correct for your riding conditions and re-try.
Too much caffeine 🤣
Boss can you give me carburator
Check out our website shopswedetech.com/product.php?productid=27 - we don't have them in stock we have to special order them. Thanks
My slide has a bit of play and makes a click noise if i press on it or open throttle a tiny bit. Is this normal? Heres a video of the issue.
m.th-cam.com/video/MPImlaggGZE/w-d-xo.html
4 minutes to talk about two little details on a carburetor. The other 6 minutes and 36 seconds were spent mumbling about caffeinated shaking hands, camera focus, and shit that doesn't matter. Cut out the BS and your videos will have more views. But hey, I guess Swedetech doesn't make its money from TH-cam. It makes it from it's expensive parts. P.S. I love my fuel system for my cr125. It works wonders and has never flooded. Oh, my flywheel cover is sick too.
We appreciate the feedback. We will continue to work on our quality and content of our videos. Regarding expensive fuel systems, talk to the racing associations who make the rules. The GFS was developed to fix a major problem karters face by being forced to use parts and equipment for motorcycles.
editors note: i love the fuel system and was only joking about high prices. if people want the best, they'll just have to pay for it. muah!!!
I don't care if Jason is caffeinated or even methed out of his damn mind; he and Reine been a huge help to me personally with my karting journey. Quality and service always worth paying a little more for, and the best of the best normally goes hand in hand with quirkiness in any category in business or life.
Caffeinated, likely a little too much. Methed out, not in this shop.
Show some RESPECT , Baldy-Lox......