Amazing video and excellent demonstration. Not overly detailed but just enough to understand. Thanks for making this video.

GREAT tutorial!! Your definitions and examples were perfect. Thanks for your effort!

I searched so long for this information. No one i ever asked could tell me how to know if its adjusted correctly (besides checking the spark plugs which still doesnt tell me what to do) This is a perfect tutorial. Short and full of information. Thanks

Damn haha, thanks for the video. i just found out that i've been adjusting my air screw instead of what i thougt was a fuel screw. I was getting really confused with the reversed outcome of turning it in and out and choking out the bike. You learn something every day.

You have answered SO MANY of my questions in the first minute... Thank you for making it easy to remember and understand!

Great video. I have a rough understanding of carbs, and this video helped me to figure out exactly what each screw does Now my little 110 ATC is swamping like never before.

That was super helpful, thank you so much. This helped clear up my service manual’s instructions as well.

Matt, Thank you for a very concise, strait forward explanation of the system. I enjoy your videos and look forward to following you in the future. 😎

Thanks for the easy to understand directions for tuning a carb. I grew up on carbs, but never knew enough about them to fine tune them. It was factory or get someone else LOL

Great explanation! I'm saving this to my favorites.

Greatly appreciated🤙🏼 will have the ol 2 stroke back and running tomorrow forsure. Kept fouling plugs. Running too rich. Definitely needed this video

Thank you for the video. Did not know if the screw on my carb was air or fuel. The last part of the video perfectly explains it by comparing an air screw against a fuel screw. Mine is fuel.

Your video really helped me out out man, thank you!

Matthew MC Repair-he doesn't even know does he What a refreshing oasis this video is. Mat probably thinks people that don't know what they're talking about would never waste their time making videos. YOU WOULD BE VERY WRONG MAT Most of the Honda XR 250 videos posted, I swear to God I don't know how these people find the door to get out of the house in the morning. Most of these videos are posted by people who bought an old dirt bike, put gas in it, kicked it and it started. THIS, THEY ARE CERTAIN MAKES THEM A CERTIFIED MASTER MOTORCYCLE MECHANIC. THANK YOU AGAIN MAT.

Wow excellent vid. Dad just bought the Boyz there first atv’s. 70cc witch is really tiny and cold blooded and a 125cc for my 7yr old. 70 hard start. 125 no problem. Half turn thanks to u and is so easy to start it’s almost the same as the bigger 125. U Da MAN!!!!!

Hey man.... Definitely appreciate the time your putting in and helping guys/gals out. If it wasnt for your video I wouldnt even know where to start. Thank you again! 👌

Keep up the good work brother! Great video!

This is exactly what I needed in good layman language! Thank you.

Thanks for sharing. I needed to find out what a pilot air screw was on a 15 hp twin cylinder Kawasaki Lawn Mower engine and this did a good job of explaining it. A lot of these lawn tractor engines do not have any adjusting screws on them these days.

FINALLY , I've spent so long searching for this vid thatn actually explains it well

If you rev engine it should return to idle RPM easily. If they dip below idle, try leaning the pilot screw. If they hang and take a while to return, try enriching the pilot screw.

Great job, I've watched a lot of videos on carburetors and finally I have one for the basics that I can save to my favorites list, you nailed it!

I really needed this, I have a Honda 250 1986 and it barely catches up with the RPM, I think the fuel is too lean cause it barely even uses fuel too. I am going to give this a try in the morning, thank you very much!

MASTER!!! thanks to you and this video my bike is now in really good running condition!!! 💪🏼😎

Damn! This was the cat's meow! Perfect video making perfect sense...thank you so much for your help! My carb Suzuki DR200 has the idle screw on the bottom of the carb...what a pain in the tush to get at it! Mine seemed to be happy at about 2-1/2 turns...

I typically adjust each carb 1/2 turn at a time. I try to reach peak & smooth idle RPM as a starting point. Sometimes, if any hesitation or bogging occurs upon acceleration, the idle mix may have to be richened slightly.

It helps a lot for me that is new in motorcycle configuration. Thanks man! :)

Good video man. BTW they make and sell a rubber plug for those air/fuel mixture screw tubes you can put in the hole after drilling it out. As you said they may not be necessary but I put them in my bike anyway to keep the trash out.

Excellent explanation for a mechanical dummy like me. Thanks

thank you bro! i was searching for an English channel! because i cant understand hindi!

Best, simple explanation video I have seen yet!

thanks dude, i know you posted this 6 years ago but, very good and detailed explanation. Two thumbs up

Best tutorial on YT

Very helpful to get my CRF150 running to sell, much appreciated! Now I won't feel like an ass selling a sub-par running bike!

Great video sir. You very good at explaining things....a natural teacher.

That has helped me immensely. Thanks Matt. Champion!

"You're screwed" Haha I see what you did there

Very informative.

Very helpful thx! You get to the point, not much excess rambling or chitchat about off topic crap. Good explanation and demo of screw locations and effects on idle. I liked the screw comparison at the end.

I dunno where you came from but thank you for just getting to the point without all the look at me I'm wasting more of your time when if you had to go looking for answers and your already frustrated useless chit chat most people put us through. Very well done

Great video! Quick question. I cleaned and rebuilt the carbs on my Virago 1100. I synched them last night and the bike seems to be running well. However, when I went to adjust the pilot screws, tightening the screw (on the front carb) actually made the revs go up after a certain point instead of down like I would have expected. Is that normal? I figured less gas would bring the revs down.

That line running to boot #2 is a vacuum line to actuate and allow fuel to flow from petcock.

Excellent tutorial. I learned something new! Thank you

Good on you mate ,well expanded, now i know exactly how to do it thank for that

I took off my carburator to clean it took it all apart put it back and my atv don't start any more and the problem is that I didn't measure the turns how do you measure the brass if it don't start you said it needs to be a hot temperature

how you meant to turn the screw when its underneath

Absolutely fantastic video, so well explained

Great Video, Thanks man, now i realized, i had backwards understanding of this screw, i thought that's control air, but i know now that control fuel, that's why my bike always have lean conditions

You need a longer screwdriver.lol.

Very helpful! Thanks for the good content 👌

Well explained and to the point. Thank you!

Your video saved me soo much trouble and concern by narrowing down the problem with my bike, Thanks! (specially the part you explain if screw is by the motor its fuel - not air)

Great explanation. I've been adjusting screw to get bike to run well, but did not know what to shoot for (other than trying to avoid lag in throttle). Thanks.

It wos spark plug,bike runs perfect now and have even more power. Thanks for your time bro!Great videos!

Thanks for this. Been wrestling with an issue with my Honda GX620 engine for years. Finally found/realized there is a pilot air screw on the inlet side. Knowing that this is what it is, and screwing in richens up the mixture is the key. It ran better when I did this, but I wanted to be sure, as it seemed counter intuitive that in is richer. Now knowing that what I was doing makes sense, I can tweak it a bit more, plus feel confident that I might finally have this solved. Many thanks again for a clear, concise, and no BS video.

very cool video dude explained alot. i've recently just had to change my complete engine on my honda shadow 700.6 weeks later finally done only 1 problem my bike is chugging in the low gears checked all piping from carb to make sure theres no excess air in take. so do you think i should try with the air/fuel screw? cud that b causing the chugging??

your videos are a life saver! thank you

I'm learning about carbs. This is a great video.

Great video. Very easy to understand. Thanks for the info.

great video dude, thanks for the real deal explanation. now that's what i'm talking about!

Great video man! Thanks! Subbed!

This video was insanely helpful, Man. Thanks!

Very helpful , now I'm Gunna look to see if you have a video on high idle screw I think it is lol or the air screw, old Tecumseh welder I'm trying to get good steady idle and then set auto idler.

Thanks for the video's. I am working on an XS750 and have to stock airbox on. I have a slight amount of fuel leaking from the airbox. Do you think the bike is likely running to rich? I dont think the floats are sticking because I just rebuilt the carbs.

Hi Matt, thanks for posting this video, for the first time I finally understand! I took notes and everything!! In your opinion, do you normally have to change jets if you take the airbox off and stick a filter on? I've got my project chinese 125 running now, (thanks to you) but it seems to be distinctly lacking power, nothing else has been altered (engine/carb-wise) except the airbbox removal..

Great Video Thanks, If you turn the fuel screw all the way in on a four cylinder bike should the engine stall or will it sty running on the other three cylinders?

So would you suggest making sure idle adjustment is at its lowest throttle setting before adjusting the idle air valve? I think my stock setting is 1.75 turns out, so I start there and then adjust the idle throttle speed screw to a decent rpm. My service manual says nothing about idle air screw adjustment, just how to adjust idle throttle speed.

Great video by the way. Thank you so much!

So well explained that I understood everything. Thanks.

Great video. I have a ninja 250 (2006) that is currently only running with the choke on. I just cleaned the carbs. Turn the choke off and it dies instantly - seems to be running pretty lean. This video gave me a few ideas to try and fix it but I figured I'd ask if you have any advice. Thanks!

Holy cow trying to figure out the difference between the fuel screw in the air fuel screw you get 20 different answers on this thing I just want to know if you turn the "fuel screw" in which is at the bottom of the carburetor does it give me more fuel or if I turn it out does it give me more fuel that's all trying to figure out.

Great video exactly what I was looking for. I’m adjusting on a two cylinder so slightly more tricky I assume? The ninja 250r is a fuel adjust. I’ll try 1.5 out on each then adjust one at a time too see if I hear a difference. Thank again mate Regards Jimmy

Hi Matt, I learned to adjust my idle correctly by this video of yours and improved my gas consumption, I never knew I was running rich with the idle screw compensating with my fuel screw. thanks for this. Just a quick question though, how do you determine the correct venturi size when choosing a carburetor for any given bike? see the engine of my bike has been used for two bikes produced by suzuki, but different carburetors, one was a 29mm and mine,a 26mm, I was thinking of changing it to a 29mm but not sure if it will actually make my bike run better. (feel, power, efficiency)

Subscribing and 100 more if I could!. Just bought a bike pretty much starting new on motorcycle stuff and riding ....you sr are a great help! Thank you so much

Fantastic video, very nicely explained Thank you very much

Glad it helped!

Thanks, glad it helped.

You have the teaching bone… good job man.

good demo, that really simplified the process. thank

great video bro!!! keep up the good work

You're a life saver. Thank you sir.

Excellent stuff.. appreciate your efforts..

Great video! Clean ATV!

I believe you are referring to the idle speed. If so, there should be a black plastic knob that you can turn to adjust to desired idle speed. The knob is attached to a flexible black tube that runs to the carb. The knob should be easy to access. Let me know if that helps.

Thanks this video was very helpful to me in getting my 1996 Honda CBR F3 running again.

Now that was a great video bud 😊 , great stuff

So glad I watched this. Almost didn’t, but I learned a lot

good tip on taking out the two screws made it way easier to identify. problem im having is when i turn the pilot air screw all the way in it rpms higher as to yours cut the bike off. any suggestions?

Great info and explanation. Thank you.

I recently purchased a brand new carburetor for my 2004 xr250r. I got the carb from XR's only. It bogs out really bad when you whack the throttle and it runs really bad above half throttle position. It also keeps fouling plugs. Do you have any recommendations? Thank you!

Hey Matt great video i think you answered my question with your video! I recently broke down my carb on my 4 wheeler and took it all apart to clean. when i put it all back together it would not idle down, i did not count my idle screw when i took it apart I thought it was going to self destruct, very high RPM, could the idle screw cause this? Thanks for any reply!

HI MATTHEW --great video all clearly explained I have a problem with my Honda CA125 Rebel 1998, after firing from the exhaust pipe just behind the elbow of a small hole leaking fuel, it looks like this does not burn all the fuel to the end, what can be the reason and what should I do, I'm not a mechanic, and I'm looking for help thanks best regards

Thx for sharing. I have a big bear that only starts with the pull cord and thats after i open the chock and punch the throtle and let starter turn a few seconds, then pull cord a few times and she will start, do you think if its not getting enough fuel would prevent it from starting with the starter?

This video helped fix my ATV. Thanks!

Yes, every jet will have a number stamped on it. What year make model are you working on? Any engine mods?

Awsome video! Really helpful thanks man!

Yes very well explained, i knew that at one time, but forgot how that worked...

Hi, I stripped and cleaned the carbs on my 1999 cbr 600fx because it was running terrible after being sat over winter. I was meticulous in putting everything back as it was when I was finishes, and although it's running now it doesn't seem to be running smoothly! Do you think my carbs might just need tuning/synchronizing? Cheers!

Hey, I have a 50cc gy6 scooter and I put a cone filter on it.What do you do with the 2 lines that went into the stock air box? Also, do I need to drill out the fuel mixture screw to readjust it! respond asap thanks,TOm

This really helped me! Thanks!