but there is no mention about slow pilot jet choosing size... you say find in on internet what size is good... but if there is no information in it so how do I chose right and how do I know if its not to big or not too small what is symptoms of running engine when wrong slow jet is chosen
@@TheMotorcycleForgewould love to see this process and how we can do it ourselves or take it to a place possibly to have it done. Thank you friend! Great informative video
Little brother great video. I am doing a video today on tuning my carb. without having the time to explain the ends and outs of how a carb. works. I am thinking of linking your video to mine if people want a full explanation of how a carb. works. What do you think?
What are the brass pipes on either side ? Some sources say they’re vents and need to be kept open and others say they’re oil/vac and should be capped if not in use ?
@jacksrcat They are most likely float bowel vents if they go down to the bottom and need to be kept open. If they go into the engine side of the carb they are vacuum fitting and if open will cause an air leak. Moat likely float vents, just blow air in them and see where they go.
That is more along the lines of what parts you have on the bike vs what jets are in your carb, as long as you have the carb dialed in it should work at all engine speeds. I 2mm oversize carb from stock will move the power to more top end, a shorter intake length and shorter exhaust are common ways that engine tuners move the power higher up for more top end. Hope this helps.
Wondering if you have any experience with blow through pwk? Mines working fine but I switched to e85 and fuel flow is up a good bit. Wondering if I can make an extension for the power jet if you will. to get it closer to half throttle and maybe get the main jet size down some? Also hoping for a bit more charge cooling although I know that's minimal. Currently I'm at a 230 main and 35powerjet but I feel the power jet isn't coming in until 90% throttle. Then it goes from a touch lean (good for spool up but not so nice when I peddle the bike at 40+psi of boost) to a good mixture. You think adding some length to it would achieve this? I can make new powerjets for different sizes pretty easy. I'd like to get it closer to a 180 main and maybe a 70 PJ if I can. Boost comes on about the same as throttle input.
Wow sounds like a pretty sick setup you got there Oliver but I have very little experience with blow through carbs. I think your idea is definatley worth a shot though. Let me know how it goes, keen on learning new stuff..
@@TheMotorcycleForge will do would be nice if it did lol. I know na you can change the length (height) to do this but blowing through sometimes things do other things.
Oliver what all did you have to do to make the pwk blow threw? I'm currently working on a pulley driven turbo and just found the right pilot jet but I can get to about 1/8 throttle and it wants to die
bro do you know about atomizer hole number? i got the same 28mm pwk, a lot of jets and needle and all the stuff, including atomizer from 4 to 32 holes. have you tried changing those? i dont know the effects of it
Ok so if it's all jetted correctly it could be that the carb is a smidge big for the engine causing a lean spot/surge. You could try making a idle a bit richer may fix this. Let me know if that helps. Cheers Logan
@@TheMotorcycleForge played with the air screw 2-3/4 out and it fixed it right up just did it a 1/4 turn each time it's fine now I know when they says 1/4 turn at a time it makes a difference
What's the big yellow screw for!?! Can't find anywhere what that changes and nobody talks about it. Throttle value screw is what it's labelled. But what does it do?
I put this carb on my mini bike and some times it just starts dumping out fuel on the ground, coming out of the carb. I recently got it to stop doing that but now it will only idle. If I lean it to one side it will die, if I lean it to the other side is will idle high. If I try to give it gas it will die, what could this be?
Does trumpet size and length really make a difference ? More top end power if Carb trumpet is shorter. More low end grunt of the Carb trumpet is longer.
It does make a difference to have the correct length to suit your cam timing, how much I'm not quite sure yet. I plan to have a dyno in the near future and will test then. I have heard from a engineer I'm friend with that they found 17% Power increase on a already worked race engine by simply altering trumpet geometry to suit the rest on the engine package.
Have a GSX150 cant get the carb running right but not many details out there on Carb setup and running for GSX150’s as everyone says they are slow. Any thoughts/suggestions ?
@@TheMotorcycleForge have a AliExpress special ZSDTRP 28mm carb, 115main jet, 48 pilot jet have needle on 2nd notch from the bottom. Bogs down at low RPM but cause it red lines so low i Can’t really keep bike at high rpms. Maybe need a CDI to extend rpm redline??? Not sure where to get one though.
Looking at what jets and needle position. It may be bogging down as it's a bit on the rich side. How many positions does have? 5? I would try a 42 / 40 pilot or drop the needle one notch as a starting point.
Help please! I have a Honda Ruckus with a stock GET 49cc 4-stroke. I put a PZ16 carb on it. After swapping the stock 35/75 jets for 38/78, it starts and idles good, and runs great at full throttle. The only problem I'm having is that sometimes, usually after a good hard run, it sputters at midrange, around 5000 - 6000 rpm. If I back off or give it more throttle, it smooths right out. I'm thinking this might be a needle clip issue, but I'm not sure which way to go. Hoping you can give me a clue, so I don't have to resort to trial-and-error. Seems to only do this at full operating temp and after being wide open for a while. Thanks!!
If it doesn't do it when it's cold and only hot it's most likely a bit rich on the needle. I would lift the clip one groove higher to lean the mid range a bit and see how it goes.
Hi, Any ideas as to what would cause my bike to feel like the throttle sticks just for a second after getting up in the rev's a bit and then backing off for a corner. It feels to stick for a second and then drop off rev's too fast so you then need to gas it more again. It is horrible to ride.
I think what could be the issue based on the symptoms you mentioned it could be a pipe bang. I would personally check the basics first, is the carb working 100%, does it have any air leaks, what is the plug like, reed condition ect. Here is a article explaining pipe bang, www.powercdi.com/manual/combustion/pipe_bangs/en.html Hope this helps Cheers Logan
@@TheMotorcycleForge Hi,Yes it has all the symptoms of that but it is a 4 stroke 250 single Chinese sports bike. I went up in carb size from 28 to 34 and I think the 34 might be to big for the poor performance Chinese engine. It has much better power and revs but this issue I think might be just too rich and only comes right just as you back off. I will borrwo a mates 32 carb and try it. Thanks for your help I think you put me in the right direction.
@@yeahrightmate What size jets are you running in the 34mm? It could actually be a bit lean on the main circuit causing the slow/delayed return to idle.
@@TheMotorcycleForge I have a 38 pilot and a 135 main. It does not return to idle slow, it just jumps forward for a split second as you back off. I borrowed a 32 today and it has 38 pilot and a 140 main and is running good, just a very very slight splutter off idle to 1/4.
Could somebody help me? After a jump or bumpy terrain my mixture go too lean. I thought something is wrong with the float height but i can find the good spot. What can be the problem? Do anyone has the same issue?
Hi, please I bought pwk30 carb for my 250 Chinese bike with Zongshen engine, but the engine idles extremely high,.... completely turning down the idle screw gives no sign...any idea about what could cause that?
Anything for a sub There are a few possible causes. 1. Something is causing the slide to stick or stopping it fully seating. 2. Throttle cable could be to short holding slide open a bit. 3. It may be to lean on idle circuit causing slow return to idle. 4. Could be to rich on idle circuit with a air leak. 5. Check what needle it has, as her video. Cheers Logan
@@TheMotorcycleForge .... I tried what u said and truly the throttle cable was short, after installing a new cable,... It needed tuning... I tried the spare jets that came along with the carb.... It revs quite well but takes a while to idle normal.... Any help on that too? The jets are 115 and 38 I placed the niddle jet locker is at the second groove from the top
@@nanayeboah475 ok that's a good start, sounds a tad lean on idle circuit. I would try putting the c-clip in the needle one grove lower/ middle groove if it has 5 groves and if that doesn't work a bigger idle jets. Maybe 40 or 42. Hope this helps. Cheers Logan
@@TheMotorcycleForge Do the letters stand for something? Someone's initials maybe? The letters obviously have a meaning to someone, like the person who developed the technique PWK. Is it actually their initials? Doubt it. More likely PWK stands for some technical ideas on construction/design that comprise that method of carburetion. Why do I need to know? Because whatever it stands for, I could then gain some understanding of how this "method" compares with other styles of carburetion. With no luck finding this definition elsewhere, I'm asking you, since you're talking about it on a video. Any idea what PWK stands for?
@@TheMotorcycleForge Thanks for geting back to me, it happens either way on decel and also when i give throttle, Choke shuts it off so i'll say makes it worse, Thanks.
@tuyo_adventures.2185 if choke makes it worse it's possibly to rich. So altering the needle position to make it leaner. Also the mixture screw will need to be altered to suit.
Hello friend, can you recommend an other type of needle besides JJY because I can't find any. Even on scooter tuning websites, what's the closest type of needle to that JJY?
If you search oko pwk needle thr top link is to drowsports who have a kit with 10 different needles. N80F from memory is very similar to JJY. You will have 9 other needles in the kit to try aswell. Cheers Logan
@@TheMotorcycleForge thank you, I'm not from America so the shipping of that wouldn't be too economic. JJJ is the closest what I could find in my country or nearby.
How do I buy a new main jet atomizer, I took it out and accidentally snapped the thread of the main jet in the atomizer, have a new main jet but no atomizer for it. 2003 yz85
Could be multiple things, if it has been sitting the jets could be blocked. Float height may be incorrect or a bit of rust or dirt might be holding the float valve open.
Wideband, this is the one I have been using and works great. www.nzperformance.co.nz/brands/innovate-motorsports/lc-2-wideband-controller-db-blue-gauge-2?gn=Innovate%20Motorsports&gp=16
A friend of mine drilled and tapped a hole in the air filter for his nitrous kit. Hard to believe they make nitrous kits for motorized bicycle lol I would buy one if you could buy more cartridges but it only comes with 5 I think
@@TheMotorcycleForge I'm thinking of getting one and putting on my bike with the zeda 80. I won't put it on my phantom 85 I don't want anything to happen to it
I have purchased a couple different ones with more holes than stock, unfortunately haven't got around to trying them yet. If you do I'd be keen to know how you get on.
@@TheMotorcycleForge i have 150cc gy6 I usually jet it 115 main now with the 30 holes needle jet I'm down to 95 main and runs somewhat rich (kinda bad up top)
@@TheMotorcycleForge I went from 110-100-98-95 it keeps getting better now I don't know if what I'm experiencing is a lean or rich condition I can't read sparkplug as my gy6 burns oil
Yeah that sounds about right, I think the more holes in the needle jet. Will add fuel in relation to position of the hole compared to the needle hight. Not sure the extra holes are needed might be making the main jet size not as important.
Ok I would have a look at adjusting the mixture screw and the jets might be a smidge big but might work ok. I did another video that's more in depth about how to jet a carb. You should find everything you need to know in that vid.
@@TheMotorcycleForgequestion I got a 150cc with 28mm PWK,air filter(48mm) & aftermarket exhaust.I’m at sea level and main jet was 120 & pilot jet was 48 but I swapped to 38.This setup should work fine?🤔…
My engine drops idle after warm up. In addition, it can stall from like this Carburetors pwk in the process of jetting What could it be ? Too small idle Jet? No air leaks for sure.
If your bike idles lower when it's hot than when it's cold it generally means the idle circuit jet is to big or mixture screw is adjusted a bit on the rich side. Also if choke is on will cause same symptoms.
@@TheMotorcycleForge OKO PWK28 with pod air filter. Yamaha rd250 twin air cooled. Now with 38 idle,jjh needle,138 Main jet. Tried also 40,42,45 pilots. With stock mikuni vm28 and stock airbox is 25/120 Main jet. I think I'll put on the 50-55 pilot jets for a test,but it's a total strange size vs stock carburetor and 125ccm single cylinder dont you think? I'm already starting to freak out about whether something is broken. Leak test done with positive results, ignition checked and coils.
Ok so a couple things you could try which I have come across before are. Pod filters sometimes mess with carbs, I think it's a resonance thing, I would do a test without them on. Also with the idle jet size, I have found the pwk carbs seem to prefer a bigger jet than what you would expect, so maybe they do need a 48 or 50 ect. I if you are thinking there is a issue with the engine, I would maybe swap out the carbs for oem do a test to confirm the engine is ok then continue with pwk jetting ect. The needle JJH I have not had much luck with personally but by the sounds of it it's probably not the issue. Let me know how you get on. Cheers Logan
Good Morning Guys, we running a Honda GX390 and I'm trying to get the 34mm slide carb to work at altitude. Are there any recommendations in terms of main jet, idle jet. Currently seems that it is only picking up halfway down the straight. Currently running a 125 main jet, 33 pilot jet.
I would be running around 125 to 130 main jet in the 34mm carb. Is it at full throttle the whole straight and then picks up half way? If so I have a feeling your carb might be to big for your engine. Stock is 27mm, I normally only go a couple mm bigger so a 28 or 30 would work better. The reasoning is carbs need a certain level of air speed to atomize fuel effectively so at low rpm the carb will stuggle to function.
Well if you can't afford a real Keihin they aren't to bad, I have done 5 years racing with one and it still works good but I definitely would take a real PWK any day haha
I just put a 1996 CR144 engine in a 1998 CR125 and this has helped me with jetting because it won’t rev out completely.
you literally explained everything i needed to know, thanks bro
Awesome.
Everyone explains how it works but no one shows tuning while on the bike
Ok I will do a video on that for you.
Now that's a awesome response
@@watcherofthingsthatrkekano5930lol is the video up yet
@@TheMotorcycleForgedid you make a video following up? Currently dealing w tuning while on bike
Yep sure did@@mluna3006
Great vid, now I want to tune up my Honda lawnmower!
dude this is exactly what i needed
well done- nice to hear basic operations explained in plain english .. er wtver
but there is no mention about slow pilot jet choosing size... you say find in on internet what size is good... but if there is no information in it so how do I chose right and how do I know if its not to big or not too small what is symptoms of running engine when wrong slow jet is chosen
thanks. I am now a Wizard
Do you have a video showing the O2 sensor?
No unfortunately not but I am thinking I might do one.
@@TheMotorcycleForgewould love to see this process and how we can do it ourselves or take it to a place possibly to have it done. Thank you friend! Great informative video
Little brother great video. I am doing a video today on tuning my carb. without having the time to explain the ends and outs of how a carb. works. I am thinking of linking your video to mine if people want a full explanation of how a carb. works. What do you think?
Yeah man sounds like a good plan,
Im ok with that
@@TheMotorcycleForge sounds good.
Nice work!
What are the brass pipes on either side ? Some sources say they’re vents and need to be kept open and others say they’re oil/vac and should be capped if not in use ?
@jacksrcat They are most likely float bowel vents if they go down to the bottom and need to be kept open.
If they go into the engine side of the carb they are vacuum fitting and if open will cause an air leak.
Moat likely float vents, just blow air in them and see where they go.
@ thanks for the reply it’s appreciated !
Very good. Cheers
How to tune for more top end power opposed to low end power?
That is more along the lines of what parts you have on the bike vs what jets are in your carb, as long as you have the carb dialed in it should work at all engine speeds.
I 2mm oversize carb from stock will move the power to more top end, a shorter intake length and shorter exhaust are common ways that engine tuners move the power higher up for more top end.
Hope this helps.
Cool video cheers mate can you tell me how many turns for mixture screw please
I did another video filling in the bits I misssed in this one but it should be around 1.5 to 2.5 turns form seated
@@TheMotorcycleForge thanks very much
Nice man!
Any chance of making a FXR150 Carb cleaning video?
Yeah that's a pretty good idea, I'll try get one done on that topic in a week or two
Super Helpful
Thanks
Wondering if you have any experience with blow through pwk? Mines working fine but I switched to e85 and fuel flow is up a good bit. Wondering if I can make an extension for the power jet if you will. to get it closer to half throttle and maybe get the main jet size down some? Also hoping for a bit more charge cooling although I know that's minimal. Currently I'm at a 230 main and 35powerjet but I feel the power jet isn't coming in until 90% throttle. Then it goes from a touch lean (good for spool up but not so nice when I peddle the bike at 40+psi of boost) to a good mixture. You think adding some length to it would achieve this? I can make new powerjets for different sizes pretty easy. I'd like to get it closer to a 180 main and maybe a 70 PJ if I can. Boost comes on about the same as throttle input.
Wow sounds like a pretty sick setup you got there Oliver but I have very little experience with blow through carbs. I think your idea is definatley worth a shot though. Let me know how it goes, keen on learning new stuff..
@@TheMotorcycleForge will do would be nice if it did lol. I know na you can change the length (height) to do this but blowing through sometimes things do other things.
Oliver what all did you have to do to make the pwk blow threw? I'm currently working on a pulley driven turbo and just found the right pilot jet but I can get to about 1/8 throttle and it wants to die
Just bought High Performance 21mm OKO Carburetor from berry
Yeah man… he’s a real wizard
Is N80F and jjy are the same ??
Nice vid dude
Thanks man glad you liked it
bro do you know about atomizer hole number? i got the same 28mm pwk, a lot of jets and needle and all the stuff, including atomizer from 4 to 32 holes. have you tried changing those? i dont know the effects of it
question got mine.all set up 28mm now I have a slight surge at idle my air screw is 2-1/2 turns out very small surge
Ok so if it's all jetted correctly it could be that the carb is a smidge big for the engine causing a lean spot/surge.
You could try making a idle a bit richer may fix this.
Let me know if that helps.
Cheers Logan
@@TheMotorcycleForge played with the air screw 2-3/4 out and it fixed it right up just did it a 1/4 turn each time it's fine now I know when they says 1/4 turn at a time it makes a difference
@@ironhead320 Sweet as, glad you got it sorted
@@TheMotorcycleForge me too that's the first thing I though carb to big but didn't have that trouble before guess it is really picky on adjustment
Very helpful
What's the big yellow screw for!?! Can't find anywhere what that changes and nobody talks about it.
Throttle value screw is what it's labelled. But what does it do?
@@mikelarin8037The big flat head screw is for adjusting the idle speed as it lifts the slide when screwed in.
I put this carb on my mini bike and some times it just starts dumping out fuel on the ground, coming out of the carb. I recently got it to stop doing that but now it will only idle. If I lean it to one side it will die, if I lean it to the other side is will idle high. If I try to give it gas it will die, what could this be?
@rebledeer9184 I would say it's a float height adjustment issue first and then will need jetting to suit.
What size engine, carb and jets
This carb is great small n light. KTM guys can't tune?
What is the size of the pwk 28 water jet and bypass hole?
When I blurp.the throttle it goes back to idle then it sounds like it wants to cut out then the idle picks back up
Does trumpet size and length really make a difference ?
More top end power if Carb trumpet is shorter.
More low end grunt of the Carb trumpet is longer.
It does make a difference to have the correct length to suit your cam timing, how much I'm not quite sure yet.
I plan to have a dyno in the near future and will test then.
I have heard from a engineer I'm friend with that they found 17% Power increase on a already worked race engine by simply altering trumpet geometry to suit the rest on the engine package.
Have a GSX150 cant get the carb running right but not many details out there on Carb setup and running for GSX150’s as everyone says they are slow. Any thoughts/suggestions ?
What are the symptoms and what carb do you have fitted?
@@TheMotorcycleForge have a AliExpress special ZSDTRP 28mm carb, 115main jet, 48 pilot jet have needle on 2nd notch from the bottom. Bogs down at low RPM but cause it red lines so low i Can’t really keep bike at high rpms. Maybe need a CDI to extend rpm redline??? Not sure where to get one though.
th-cam.com/video/mH2OvR4OTlA/w-d-xo.html
Looking at what jets and needle position. It may be bogging down as it's a bit on the rich side.
How many positions does have? 5?
I would try a 42 / 40 pilot or drop the needle one notch as a starting point.
Help please! I have a Honda Ruckus with a stock GET 49cc 4-stroke. I put a PZ16 carb on it. After swapping the stock 35/75 jets for 38/78, it starts and idles good, and runs great at full throttle. The only problem I'm having is that sometimes, usually after a good hard run, it sputters at midrange, around 5000 - 6000 rpm. If I back off or give it more throttle, it smooths right out. I'm thinking this might be a needle clip issue, but I'm not sure which way to go. Hoping you can give me a clue, so I don't have to resort to trial-and-error. Seems to only do this at full operating temp and after being wide open for a while. Thanks!!
If it doesn't do it when it's cold and only hot it's most likely a bit rich on the needle.
I would lift the clip one groove higher to lean the mid range a bit and see how it goes.
Hi, Any ideas as to what would cause my bike to feel like the throttle sticks just for a second after getting up in the rev's a bit and then backing off for a corner. It feels to stick for a second and then drop off rev's too fast so you then need to gas it more again. It is horrible to ride.
I think what could be the issue based on the symptoms you mentioned it could be a pipe bang.
I would personally check the basics first, is the carb working 100%, does it have any air leaks, what is the plug like, reed condition ect.
Here is a article explaining pipe bang, www.powercdi.com/manual/combustion/pipe_bangs/en.html
Hope this helps
Cheers Logan
@@TheMotorcycleForge Hi,Yes it has all the symptoms of that but it is a 4 stroke 250 single Chinese sports bike. I went up in carb size from 28 to 34 and I think the 34 might be to big for the poor performance Chinese engine. It has much better power and revs but this issue I think might be just too rich and only comes right just as you back off. I will borrwo a mates 32 carb and try it. Thanks for your help I think you put me in the right direction.
@@yeahrightmate What size jets are you running in the 34mm?
It could actually be a bit lean on the main circuit causing the slow/delayed return to idle.
@@TheMotorcycleForge I have a 38 pilot and a 135 main. It does not return to idle slow, it just jumps forward for a split second as you back off. I borrowed a 32 today and it has 38 pilot and a 140 main and is running good, just a very very slight splutter off idle to 1/4.
Nice video
Thanks !
Could somebody help me? After a jump or bumpy terrain my mixture go too lean. I thought something is wrong with the float height but i can find the good spot. What can be the problem? Do anyone has the same issue?
Could be many things, is it out of fuel, have you developed a air leak, is a jet blocked, is something blocking the float valve.
Cheers Logan
Hi, please I bought pwk30 carb for my 250 Chinese bike with Zongshen engine, but the engine idles extremely high,.... completely turning down the idle screw gives no sign...any idea about what could cause that?
Anything for a sub
There are a few possible causes.
1. Something is causing the slide to stick or stopping it fully seating.
2. Throttle cable could be to short holding slide open a bit.
3. It may be to lean on idle circuit causing slow return to idle.
4. Could be to rich on idle circuit with a air leak.
5. Check what needle it has, as her video.
Cheers Logan
@@TheMotorcycleForge thanks... Will try that
@@TheMotorcycleForge .... I tried what u said and truly the throttle cable was short, after installing a new cable,... It needed tuning... I tried the spare jets that came along with the carb.... It revs quite well but takes a while to idle normal....
Any help on that too?
The jets are 115 and 38
I placed the niddle jet locker is at the second groove from the top
@@nanayeboah475 ok that's a good start, sounds a tad lean on idle circuit. I would try putting the c-clip in the needle one grove lower/ middle groove if it has 5 groves and if that doesn't work a bigger idle jets. Maybe 40 or 42.
Hope this helps.
Cheers Logan
@@TheMotorcycleForge will try that too... Thanks in advance
I never heard an explanation of what "PWK" means. Is that a brand? A type? A model series?
The original PWK is a model/style of carb made by Keihin but most people can't afford them so get the cheaper copy the OKO 😁
@@TheMotorcycleForge Do the letters stand for something? Someone's initials maybe? The letters obviously have a meaning to someone, like the person who developed the technique PWK. Is it actually their initials? Doubt it. More likely PWK stands for some technical ideas on construction/design that comprise that method of carburetion. Why do I need to know? Because whatever it stands for, I could then gain some understanding of how this "method" compares with other styles of carburetion. With no luck finding this definition elsewhere, I'm asking you, since you're talking about it on a video. Any idea what PWK stands for?
@@scottalanclymer I have heard it stands for Power Without Komprimise but as you can see it's not quite spelt correctly.
Hope this helps.
Cheers Logan
Salut sinon pour mesurer la hauteur ou mises à niveau flotteur il faut que le centre du flotteur soit parallèle au plan de joint du carburateur
I am getting a back fire at middle range, how can I know if the mix is too rich or too lean? Thanks
@tuyo_adventures.2185 does this happen when cold or hot.
Does the choke make it worse or go away?
@@TheMotorcycleForge Thanks for geting back to me, it happens either way on decel and also when i give throttle, Choke shuts it off so i'll say makes it worse, Thanks.
@tuyo_adventures.2185 if choke makes it worse it's possibly to rich.
So altering the needle position to make it leaner.
Also the mixture screw will need to be altered to suit.
Hello friend, can you recommend an other type of needle besides JJY because I can't find any. Even on scooter tuning websites, what's the closest type of needle to that JJY?
If you search oko pwk needle thr top link is to drowsports who have a kit with 10 different needles. N80F from memory is very similar to JJY.
You will have 9 other needles in the kit to try aswell.
Cheers Logan
@@TheMotorcycleForge thank you, I'm not from America so the shipping of that wouldn't be too economic. JJJ is the closest what I could find in my country or nearby.
How do I buy a new main jet atomizer, I took it out and accidentally snapped the thread of the main jet in the atomizer, have a new main jet but no atomizer for it. 2003 yz85
Look up Emulsion Tube for the carb you have (PWK) and you should be able to find a new one for sale easy.
do know if 97A pwk needle is any good for my 24mm pwk carb?
It is not a needle I have used personally. Have you tried it, if so what was it doing?
@@TheMotorcycleForge I ordered it because my old needle was bent and I thought if I could get better performance with different needle.
Oh I see, looking at the pictures of a 97a it looks quite wide. May make the bike quite lean but you will have to test to be sure.
Having hard times fixing my bike and someone told me its the carb and nothing is working it doesn’t wanna stay running
Could be multiple things, if it has been sitting the jets could be blocked. Float height may be incorrect or a bit of rust or dirt might be holding the float valve open.
@@TheMotorcycleForge oh man this sucke ha
Very good video for noobs ❤
Thanks man
If you use a 02 sensor is there and specific number for idle
It depends on your application, 14-1 for fuel efficiency on a road bike.
12.6 - 1 or around 13 - 1 for a race bike.
@@TheMotorcycleForge ok thanks
What type of 02 sensor narrow or wideband
Wideband, this is the one I have been using and works great.
www.nzperformance.co.nz/brands/innovate-motorsports/lc-2-wideband-controller-db-blue-gauge-2?gn=Innovate%20Motorsports&gp=16
What’s the difference between this PWK and PE nibbi carburetor?
Depending on the model but the only physical difference is the round slide vs flat slide.
Jetting and setup will still be the same process.
A friend of mine drilled and tapped a hole in the air filter for his nitrous kit. Hard to believe they make nitrous kits for motorized bicycle lol I would buy one if you could buy more cartridges but it only comes with 5 I think
Wow that sounds awesome, wonder how long the engine will last.
@@TheMotorcycleForge there's videos of people using them and they seem to hold up. It's not like it's a big shot
I give it a look, sounds like fun
@@TheMotorcycleForge I'm thinking of getting one and putting on my bike with the zeda 80. I won't put it on my phantom 85 I don't want anything to happen to it
Yeah man fair enough, keep the best bike safe 😁
I expected to see how to hook mine up, not take it apart. shrugs...
5 inlets/outlets, lol...totally lost on this one. No manual.
I made a better video addressing what I missed in this one, check it out
@@TheMotorcycleForge Thanks, will
do!
Any opinions on 30 holes needle jet?
I have purchased a couple different ones with more holes than stock, unfortunately haven't got around to trying them yet.
If you do I'd be keen to know how you get on.
@@TheMotorcycleForge i have 150cc gy6 I usually jet it 115 main now with the 30 holes needle jet I'm down to 95 main and runs somewhat rich (kinda bad up top)
@@TheMotorcycleForge I went from 110-100-98-95 it keeps getting better now I don't know if what I'm experiencing is a lean or rich condition
I can't read sparkplug as my gy6 burns oil
Yeah that sounds about right, I think the more holes in the needle jet.
Will add fuel in relation to position of the hole compared to the needle hight.
Not sure the extra holes are needed might be making the main jet size not as important.
Went with a new carb but when I rap the throttle quick it bogs down I went with a 26mm
What bike is it on and have you jetted it yet or just fitted it?
@@TheMotorcycleForge it's a 150cc scooter no it has. 108 main and 38 pilot
@@TheMotorcycleForge didn't jet it yet
Ok I would have a look at adjusting the mixture screw and the jets might be a smidge big but might work ok.
I did another video that's more in depth about how to jet a carb.
You should find everything you need to know in that vid.
@@TheMotorcycleForgequestion I got a 150cc with 28mm PWK,air filter(48mm) & aftermarket exhaust.I’m at sea level and main jet was 120 & pilot jet was 48 but I swapped to 38.This setup should work fine?🤔…
My engine drops idle after warm up. In addition, it can stall from like this Carburetors pwk in the process of jetting What could it be ? Too small idle Jet? No air leaks for sure.
If your bike idles lower when it's hot than when it's cold it generally means the idle circuit jet is to big or mixture screw is adjusted a bit on the rich side.
Also if choke is on will cause same symptoms.
@@TheMotorcycleForge By screwing in the air screw to almost "0" rpms begin to rise, what would suggest a pilot jet is too small? 🤔
Yes definitely that could be the cause, what jets, carb size and bike are they on?
@@TheMotorcycleForge OKO PWK28 with pod air filter. Yamaha rd250 twin air cooled. Now with 38 idle,jjh needle,138 Main jet. Tried also 40,42,45 pilots. With stock mikuni vm28 and stock airbox is 25/120 Main jet. I think I'll put on the 50-55 pilot jets for a test,but it's a total strange size vs stock carburetor and 125ccm single cylinder dont you think? I'm already starting to freak out about whether something is broken. Leak test done with positive results, ignition checked and coils.
Ok so a couple things you could try which I have come across before are.
Pod filters sometimes mess with carbs, I think it's a resonance thing, I would do a test without them on.
Also with the idle jet size, I have found the pwk carbs seem to prefer a bigger jet than what you would expect, so maybe they do need a 48 or 50 ect.
I if you are thinking there is a issue with the engine, I would maybe swap out the carbs for oem do a test to confirm the engine is ok then continue with pwk jetting ect.
The needle JJH I have not had much luck with personally but by the sounds of it it's probably not the issue.
Let me know how you get on.
Cheers Logan
Has anyone tuned this carb for a built 212 predator engine?
Not me but if your struggling, putting a Air fuel ratio kit will make it a piece of cake
I bought a carb the same just black and red and it started leaking gas fast & a lot from the bottom and the hole where it gets air
Sounds like it is flooding, check the float height as in the video and make sure there is no dirt/rust holding the float valve open
Does anyone know why my needle isnt slipping out?
@@nilskarlsson748 could be gummed up with old fuel or could have a retention system.
I’ve heard viagra works well.
Good Morning Guys, we running a Honda GX390 and I'm trying to get the 34mm slide carb to work at altitude.
Are there any recommendations in terms of main jet, idle jet.
Currently seems that it is only picking up halfway down the straight.
Currently running a 125 main jet, 33 pilot jet.
I would be running around 125 to 130 main jet in the 34mm carb.
Is it at full throttle the whole straight and then picks up half way? If so I have a feeling your carb might be to big for your engine.
Stock is 27mm, I normally only go a couple mm bigger so a 28 or 30 would work better.
The reasoning is carbs need a certain level of air speed to atomize fuel effectively so at low rpm the carb will stuggle to function.
I'm still no wizard
Surely you feel a little bit magical? 😅
Where tf do you put the fuel line
It will be the largest brass fitting on the carb, can be on R or L depending on make of carb. Small ones are breathers.
Pwk is pretty woman kitchen
FUNDAMEENTALS
Notice how he say nothing about the power jet
Magkano. Po
Walker Cape
Dickinson Estates
Jayde Cape
Meine drecks gurke will im stand nicht laufen. Nimmt gas an fährt auch aber im stand direkt aus
These OKO Carbs are rubbish...
Well if you can't afford a real Keihin they aren't to bad, I have done 5 years racing with one and it still works good but I definitely would take a real PWK any day haha
no i have with 70ccm sport class on dyno 11HP ( OKO 24mm pwk)
@@spotter3970 no idea wtf sport class means, but a very simple 70cc cylinder kit can do 13hp with 21 pwk
Ear 👂 for air 😂
Pretty much how you tune dual carbs weather kadrones or webers on a volkswagen...you grow an ear to synch them.