@@UpAllNight91 Cool man. Glad you loved the KX. I'm pleased to hear from you in particular what a good motor the 05 has. Means a lot coming from you. Gives me great satisfaction. I'm in South Africa. So long bro. Will be checking more of your channels in future. Top tier. Congrats
Quick tip if you got an overflowing carb after putting back together. Shut off gas and blow in to the gas line, hard n fast. it'll reset the float valve. Usually works
Yes. That does work too. Done that before. But be careful on some carbs like the KTM85 and ltz400 carbs have rubber o rings around the removable float needle seat. I have blown them o rings out by blowing air into the fuel inlet
99s don’t have the pwk I believe they ran the pwm until 03 on those the idle control is integrated into the choke which I see a lot of people mistake and said the air screw is the idle adjustment, just for anyone with older bikes in the comments screwing the choke counterclockwise will open air flow and clockwise will close.
Air screw is intake side of carb and fuel screws are exit side or engine side. Some two stroke carbs have both. Don’t think Iv ever seen an air screw on a four stroke.
you really know your shit! Glad I found your channel I can learn a lot from you!!! What year is this 250cc? Clean bike thank you for the great information!
Long time viewer first time asking a question. I have a 86 yz250 with a mikuni that has a #350 main and I'm replacing it with a newer pwk but it has a 150 main. Is this not going to work?
Hello., thanks for watching and good to hear from ya! Hmm. 150 sounds a little lean for a YZ250. I mean it might be ok but hard to say. If I was putting a PWK on a 86 YZ250 I would look at what jetting the earlier YZ250 came with that had a PWK on it. I checked pro circuits site to see what jetting the 1996 to 1998 YZ250 came with (here is a link www.procircuit.com/jettingspecs6.htm ) and I would start with that jetting and then make changes from there. The 1996 to 98 YZ250 had the same bore and stroke as the 1986 so its a good place to start.
Hey man, great video! I have an 04 yz250, it's pouring gas out of the side hoses. I rebuilt it, put a new needle valve in, the seat looks fine and the float height looks fine.. I can't figure it out.. any ideas??
Hello. Sometime that can happen when the needle doesnt seat in well. Try this... Turn the gas on to fill the bowl then shut the gas off. Start the bike and let it run with the gas off for about 1 to 2 minutes. Then turn the gas back on while its running. let me know if that helps, if not we can go to step two lol
Hey. Can you give me a hint of how i could set my idleing plastic screw to neutral position ? ( Not air screw ) if i cant find a good neutral position is hard to determine the right jetting and corect position of the air screw. The idling a screw play a huge role and cand dump a tone of air inside.
They can be very touchy. I usually set mine where it barely stays alive. It idles just high enough to barely keep it alive if I need to adjust my Google or whatever. Being these are race bike they are not really the best at getting a good trail bike like idle.
I have a problem with this tool, it's a 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 engine goes straight up to very, very high levels 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 please
Hello. This can be caused by so many different things. A overly lean condition due to a carburetor issue, or a major air intake leak, or the carburetors throttle slide is not closing all the way due to the throttle cable being adjusted too tightly or damaged. There are some any things to check but I would start there.
I have a 2022 yz 125 the bike is brand new has around 3 hours on it but have had to changed the plug 2 times to ride The bike starts but can only ride up the street before it dies and bogs out it starts after sitting for a couple minutes not sure what it is I haven’t cleaned the carb would that be it pls help
@@bencondon1666 ok. I would look into the carb. I would start by removing the float bowl drain on the bottom of the carb (17mm wrench) and make sure a main just did come loose and fall to the bottom. If that looks good then while the float bowl drain is off turn the fuel on and see if it flows out of the drain quickly letting us know if the carb is getting fuel quickly as needed.
Hello, I have mounted a fatty and shorty fmf exhaust on my yz 250 23, my question is is it protected with the 50 n3ew pos 2 series carburetion and 178 main jet, or should it go up to 180, thanks in advance
Hello. Near sea level that will be good safe jetting. Air screw around 1 turn is good too. I would try a 52 pilot, sounds rich I know but this motor likes it at tip in. And a 175 main might wake that FMF pipe up. Would try that too.
Good stuff. No matter how much I know about Keihins I still enjoy listening other people’s thoughts on tuning them. Nice work.
Thanks!
Most informative MX videos on RUclips! I’ve learned so much thank you. Can’t wait for the next one!
Thanks!
First class tutorial as usual. The correct way to repair bikes. Absolutely no BS on this channel. Same carb on 05 KX 250
Thanks! Yup, same as 2005 KX250. I had a 2006 KX250. That is a great bike. The motor from 2005 to 2007 was amazing!
@@UpAllNight91 Cool man. Glad you loved the KX. I'm pleased to hear from you in particular what a good motor the 05 has. Means a lot coming from you. Gives me great satisfaction. I'm in South Africa. So long bro. Will be checking more of your channels in future. Top tier. Congrats
@@niconine268 Thanks! South Africa!
Thank you very much for taking the time to make this video. Very good, detailed information.
Thanks and your welcome!
Thanks for this. Carbs/Jetting has be something I’ve avoided for years lol
Right on! Hope it was of help.
Good job and explanation on float bowl height at 16:00 👍
Thanks!
Awesome videos man appreciate the effort! Hey have you ever encountered a fuel starvation problem at WOT?
Thanks. Yeah I have, from clogged petcock.
Great video! Looking forward to parts 2 and 3!!
Thanks! Hoping to have 2 out mid week this week.
Looking to buy one here shortly. Thanks for the great tutorial. Can't wait for part 3
Nice! Thanks and thanks for watching!
Great video. Can’t wait for next one!!!
This is a spectacular video!!! Thank you so much
Thanks! Glad to hear it helps!
Quick tip if you got an overflowing carb after putting back together. Shut off gas and blow in to the gas line, hard n fast. it'll reset the float valve. Usually works
Yes. That does work too. Done that before. But be careful on some carbs like the KTM85 and ltz400 carbs have rubber o rings around the removable float needle seat. I have blown them o rings out by blowing air into the fuel inlet
99s don’t have the pwk I believe they ran the pwm until 03 on those the idle control is integrated into the choke which I see a lot of people mistake and said the air screw is the idle adjustment, just for anyone with older bikes in the comments screwing the choke counterclockwise will open air flow and clockwise will close.
I think you are correct. At least for 1999. I thought by 2000 they where all PWK but could be wrong.
My 2000 250 has the pwk
Air screw is intake side of carb and fuel screws are exit side or engine side. Some two stroke carbs have both. Don’t think Iv ever seen an air screw on a four stroke.
Ahh, never actually notice that. Totally makes sense.
lube the boot slightly before lowering subframe and boot will slip over carb super easy.
Thought it already had enough 2 cycle oil on it lol. Usually goes on easier than that though
you really know your shit! Glad I found your channel I can learn a lot from you!!! What year is this 250cc? Clean bike thank you for the great information!
Thanks, appreciate it! she's a 2018. About 160 hours on her now.
Long time viewer first time asking a question. I have a 86 yz250 with a mikuni that has a #350 main and I'm replacing it with a newer pwk but it has a 150 main. Is this not going to work?
Hello., thanks for watching and good to hear from ya! Hmm. 150 sounds a little lean for a YZ250. I mean it might be ok but hard to say. If I was putting a PWK on a 86 YZ250 I would look at what jetting the earlier YZ250 came with that had a PWK on it. I checked pro circuits site to see what jetting the 1996 to 1998 YZ250 came with (here is a link www.procircuit.com/jettingspecs6.htm ) and I would start with that jetting and then make changes from there. The 1996 to 98 YZ250 had the same bore and stroke as the 1986 so its a good place to start.
Hey man, great video! I have an 04 yz250, it's pouring gas out of the side hoses. I rebuilt it, put a new needle valve in, the seat looks fine and the float height looks fine.. I can't figure it out.. any ideas??
Hello. Sometime that can happen when the needle doesnt seat in well. Try this... Turn the gas on to fill the bowl then shut the gas off. Start the bike and let it run with the gas off for about 1 to 2 minutes. Then turn the gas back on while its running. let me know if that helps, if not we can go to step two lol
Hey. Can you give me a hint of how i could set my idleing plastic screw to neutral position ? ( Not air screw ) if i cant find a good neutral position is hard to determine the right jetting and corect position of the air screw.
The idling a screw play a huge role and cand dump a tone of air inside.
They can be very touchy. I usually set mine where it barely stays alive. It idles just high enough to barely keep it alive if I need to adjust my Google or whatever. Being these are race bike they are not really the best at getting a good trail bike like idle.
Hello again. What size are the top cover screws? Thanks!
Hello. Thats a 3mm allen
I have a problem with this tool, it's a 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 engine goes straight up to very, very high levels
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 please
Hello. This can be caused by so many different things. A overly lean condition due to a carburetor issue, or a major air intake leak, or the carburetors throttle slide is not closing all the way due to the throttle cable being adjusted too tightly or damaged. There are some any things to check but I would start there.
I have a 2022 yz 125 the bike is brand new has around 3 hours on it but have had to changed the plug 2 times to ride
The bike starts but can only ride up the street before it dies and bogs out it starts after sitting for a couple minutes not sure what it is I haven’t cleaned the carb would that be it pls help
Hello. Are you shutting the choke off after starting it?
@ yes
@@bencondon1666 ok. I would look into the carb. I would start by removing the float bowl drain on the bottom of the carb (17mm wrench) and make sure a main just did come loose and fall to the bottom. If that looks good then while the float bowl drain is off turn the fuel on and see if it flows out of the drain quickly letting us know if the carb is getting fuel quickly as needed.
Hello, I have mounted a fatty and shorty fmf exhaust on my yz 250 23, my question is is it protected with the 50 n3ew pos 2 series carburetion and 178 main jet, or should it go up to 180, thanks in advance
Hello. Near sea level that will be good safe jetting. Air screw around 1 turn is good too. I would try a 52 pilot, sounds rich I know but this motor likes it at tip in. And a 175 main might wake that FMF pipe up. Would try that too.
@@UpAllNight91 thank you so much
@@Liliros No problem!
I love you