How to adjust idle on 2 stroke dirt bike - air screw adjustment 2 stroke.

[@markwinchester3005]

This vid should be a reference point for everyone tuning a 2 stroke. Simplifies it all.

[@joeybujak7935]

People like you are why everybody loves the biking community simple explanations and best accurate tips that actually help

[@dirtniron]

I appreciate that! Glad you found the video helpful, thanks Joey

[@kylesweeney7547]

Best tutorial I've found so far. Thanks man!

[@dirtniron]

Cool Kyle, glad it helps! Thanks

[@sendit1158]

Ya he explains his vids well

[@michellestillwell4371]

Facts

[@LearnandexplorewithNysa]

Hello, kzbin.info/door/C_6JM8WBt4aiZOtdeMZ5pw Please like, share, and subscribe to my channel also do not forget to press the bell icon to get new video updates Thank You!!

[@LearnandexplorewithNysa]

@@dirtniron Hello, kzbin.info/door/C_6JM8WBt4aiZOtdeMZ5pw Please like, share, and subscribe to my channel also do not forget to press the bell icon to get new video updates Thank You!!

[@Alex_Janito23]

A truly solid foundation for new 2 stroke owners. THANK YOU!!

[@dirtniron]

Glad to help!

[@pickleberryyum404]

This video on two strokes taught me more about tuning a 4 stroke than 7 other videos I watched on 4 strokes before this. Thanks you for differentiating the different types of screws and being specific instead of just throwing the same term around over and over

[@dirtniron]

thanks, glad it helps!

[@2WheelDerness]

@@dirtniron i have one issue with same carb, runs fine, revs good, but stay to high at idle or die. cant find that low rpm idle like yours. also sometime I adjust it and is fine, than in the middle of ride again goes to high or die. I always keep a little play on the throttle. (edit: 1 size bigger pilot jet was needed. First I raised one clip the needle, then it run very bad but the idle was great, so I put the needle back and switch the pilot jet to one size up and runs and idle perfect now) Thanks for video.

[@Avdknight]

Dude I'm seriously surprised you're videos don't have more views they're super informative , I just picked up an 03 KX100 and your videos REALLY help man!

[@dirtniron]

thanks Lazaro, glad the videos are helping! good luck with your green ripper! ;)

[@kristianj1977]

New subscription here. I hope you keep up the content too

[@FranciscoMartinez-j6w]

This guy is way to underrated!!!!! Im definitely keeping up with him !

[@dirtniron]

thanks bro ;)

[@FranciscoMartinez-j6w]

I just got a yz85lw from dealership and it didn’t want to stay idling. Watched this video and its super crispy now!!!

[@cocoablini]

This is a nice, basic explanation of how throttle stop idle screw works and the idle air/pilot air screw relates to it. Thank God this guy did this

[@dirtniron]

thanks Justin, glad you find it helpful

[@markwatkins2081]

I must admit I adjusted the idle on my Yamaha yz125 by the cable, I did know it was not right to do it that way but I was too frightened to mess around with the screws on the carb in case I messed it up and couldn't put it right but after watching this video I'm no longer frightened and am going to do it the correct way tomorrow. Thank you for explaining it in a simple understandable way.

[@dirtniron]

cool Mark, glad you found it helpful. Good luck tomorrow!

[@danbennett8026]

I’m guilty also

[@mod8932]

I watched all kinds of confusing videos on this you are the only one that I learned something from and got my ATV back on the road Thanks.

[@dirtniron]

Glad it helped, thanks!

[@stefandumitrache5166]

I remember just 3 years ago when I got my first bike and watched your video and not knowing anything and now I repair bikes for people I know and friends

[@samcraig1051]

Thank You, I put a new carb on a 71, CT175 Yamaha that hasn't run in years.. (Haven't owned a 2 stroke in 30 years) Helped me out alot!

[@dirtniron]

Glad it helped

[@martinmagro5728]

So easy to understand, never played around with carbys but this has helped so much with such a little adjustment. Thank you

[@dirtniron]

Glad it was helpful!

[@martymcmannis6581]

Very good information about this. I believe that the biggest problem is people will do this only when they have to. Not very often so it's forgetting how to. But then again, they don't have to with videos like this one. Thanks for sharing this

[@chigginscustomhomes]

Thank you for your input. My son's bike was running like crap. I got it running a little better but after watching your video I was able to get it running great. Thank you again

[@dirtniron]

You are welcome Chad, I am glad it helps! 👍 have fun with your son!

[@jeffhiggins1340]

Great video. I battled with idle on a 2021 kx85 for 2 weeks. This video helped. I turned in both idle and air screw and started the bike and continued to turn down the idle until the bike quit. Started again and turn ed air screw out until there was excellent throttle response.

[@dirtniron]

glad to hear that the video was helpful. have fun Jeff!

[@mazdar100]

Best tuning explanation I’ve heard to date. Well done!

[@dirtniron]

thanks, glad it helps!

[@diarmuidoc9427]

Great information Rado. Wish I knew this 10 years ago, I adjusted my idle on 2006 Cr250 the wrong way! Had a flashback watching this video! Enjoying your vids.👍

[@dirtniron]

Thanks man ;)

[@fetusdalandlord8310]

By far the most helpful video I’ve found

[@heritagevalleypropaintingl7911]

ABSOLUTELY BEST TUTORIAL YET FOR A NEWBY LIKE ME !!! THANK YOU FOR YOUR TIME AND THOUGHT INTO YOUR VIDEOS!!!

[@dirtniron]

Glad it was helpful!

[@trentdawg2832]

I just rebuilt the carb on my sons kx80 with an AllBalls rebuild kit and put in a fancy new reed valve while i was at it, this video made it simple for me to dial in the carb…..im a 240lb 6’3” dude and i hopped on that lil bike and it had no problems lifting the front wheel in the first 3 gears with just the throttle….(no clutch dumps)….i swear that thing pulls like a 125 or something even bigger….damn near scared to give it to him and tell him to stay on the xr100 or maybe even my old xr250……

[@svttodd]

This has been already said, but this is the best 2 stroke jetting and idle video yet!

[@dirtniron]

Thanks a lot Todd, glad the video is helping!

[@kings17court]

Quite a library of useful information you've put together. This video was EXACTLY what I was looking for. In your "I was wrong about the YZ125x," I mentioned that I was on the verge of getting my son a 2-stroke 85. When I bought it the bike would not idle. I felt confident that it was something simple, because it would start first kick (as long as you gave it a little throttle when kicking it over), but it would not idle. I didn't have a screw driver, so I tried with my fingers, but it was too tight. I bought it anyway. When I got it home, I set air screw out to the "starting point" of 1.5 turns out, and with adjustment of the idle screw, I achieved a pretty good idle. The only minor issue I have is that once it's idling nice and low, it kinda bogs a little when you blip the throttle. Once it revs, and you let go and re-blip the throttle it's pretty much perfect. But when you let it do the nice low idle again, and blip the throttle, you once again get that initial bog. This video has made me hopeful that if I play with the air screw, I might be able to get rid of the initial bog off of idle. Thanks.

[@dirtniron]

glad you hear that, appreciate it! you should be able to get rid of the bog, she might need little bit more fuel.. I bet your boy is ripping that 85 ;) good job dad!!

[@kings17court]

@@dirtniron My son started with a PW50, moved to a KLX110, and then a CRF125F. The KX85 is his first serious bike, so he officially entered the big time. :-) I'm already planning his next ride. If he clicks with the 2-stroke, his next bike will be a KX100. If he doesn't click with the 2-stroke, his next bike will be a CRF150R.

[@ruriijassem7252]

Best channel ever about pitbikes

[@cheesewhiz32]

thank you! This video was super helpful. You helped me get my 1976 YZ80 running, it was jetted way off after getting a replacement eBay carb for it. now it idles great!

[@dirtniron]

Glad I could help

[@kevincox1268]

Thank you, just rebuilt my sons kx 85, and you have helped me 100%! Much appreciated!

[@dirtniron]

thats great Kevin, glad you hear that! have fun with your boy!

[@treasurestateunlimited6338]

Most helpful video I've found yet. definite thumbs up, thank you very much! got my first ever 2 stroke today (04 CR250) had this exact issue with the idle due to change in elevation and before I saw this vid I couldn't figure out what was going on with the carb. I had people literally try to tell me my bike had a bad crank seal lol.

[@popabear1026]

Awesome me too 93 cr250 don't idle he said so this video super helped

[@AngelZLopez]

This video saved me time & money! I took my dirt bike to dealer to get inspected & after watching this I was able to do it myself

[@dirtniron]

cool man! glad to hear that

[@spirited1puppetmastered917]

Best carb tuning vid yet ! Thanks for making it simple to understand

[@dirtniron]

thanks, glad it is helpful

[@codycallaway2911]

I really like the way you covered throttle free play!!

[@niconine268]

Straight up. This is how I've come to understand it. I have the keihin pwk short body

[@sebam80]

You are good men! Gretings from Poland!

[@dirtniron]

thanks brother :)

[@skylerlewis16]

Brooo! Thank you so much! I’ve got a 2021 YZ250. I took out out for my first ride and it wouldn’t hold idle. I have this same carb on the bike. I turned in the idle screw until it would stay running. It takes 4 to 8 kicks to get started and I’ve been fouling plugs like crazy. I had no idea that there was also an air screw. You’ve saved me a lot of heartache here. Thanks again, awesome video!

[@dirtniron]

cool Skyler! glad to hear that. Enjoy your bike 👍

[@whitetrashgarage8110]

Depending on your elevation and temperature your jetting could be off. I live basically at sea level and it was still jetted too rich. I had to change the pilot and main jet and adjust the needle. At sea level the air is denser and you need more fuel (more rich) so it seems like factory jetting is almost too rich for anyone. Fouling plugs can be too rich or just not being fast enough to keep the engine cleaned out.

[@bwing411]

Thank you so much. I just got a 2022 ktm 150, and I’m getting back into riding. I knew right away the throttle response was off, but I couldn’t tell if it was fuel mix, jetting, etc. this helped!

[@Roccodimauro3116]

On ur bike did this make the bike run better when riding it or was it just effective at idle

[@aydenmizen4]

Best explanation I've seen. Thank you. Explained and illustrated.

[@dirtniron]

Glad it was helpful!

[@bozi7023]

I've been riding bikes for years, as well as watching you tube for years and quite honestly this video if by far one of the best I have seen for adjusting pilot jets!!! I wish you all the best with your channel and the great straight to the point here is how its done attitude! Awesome!

[@dirtniron]

thanks a lot, I am glad the video is helping. you just made my day! ;)

[@morpheusone7755]

Iv used this a few times now brilliant informative video, thankyou fella my bike is sounding so crisp.

[@dirtniron]

Glad it helped!

[@kevinpatterson1680]

Thank you so much for this tip. Big fan of your channel and your work with Jay Clark!

[@MrJames-dk3my]

Straight and to the point. Great explanation, my bike boged a bit and wouldn't idle on its own.now after tuning my bike like he did it runs great now.

[@dirtniron]

cool man, glad it helps!

[@brycemaggio6144]

This is fantastic! No bullshit. Good video and audio quality. Close up shots. Thank you man

[@dirtniron]

thanks, glad it helps

[@kristianj1977]

Excellent, I have just bought myself ktm 200 and it's bogging a little in low revs so gonna have a play tomorrow before I take her out. Subscribed

[@matiasiudica3605]

Im having trouble understanding where is the base position for idle speed screw to start with. I know that air screw must be all the way in and then 2 turns out to start adjusting, but what about idle speed screw does it need to be setted to a similar position first? Hope you get to see this, thanks for the videos!

[@stanleykania7184]

Had re-jet for warmer weather and used your video to set idle.. thank you I'm running crisp for my Hatfield McCoy riding !!

[@dirtniron]

glad it helps, thanks for sharing!

[@ronchp1498]

Thank you so much, i was going crazy trying to adjust that screw on a 2 stroke, i was doing it the wrong way !!!!!!. Thanks for taking your time to explain the diference between that screw on a 2 stroke and a 4 stroke.

[@dirtniron]

cool Ron, glad it helps!

[@zmike9831]

thanks man so much,i bought a 95 cr250 and ti will idle so low it would die some times when completely hot,so i adjusted the throttle so it opens the slide,what happed was it idles without dying but when warm without load it would climb to insane rpm level,so even thought it idled it would rev to like 5000 rps without load.i worked with 4 strokes up until i bought this cr250 and this vid helps a lot.

[@dirtniron]

cool man, glad it helps!

[@livingedgeresin]

If I want to start from scratch, I would put the air screw 2 turns out as you said, but how many turns out should the idle adjustment screw be?

[@MrBrandonh98]

Came here for the same thing. Need a starting point for the idle screw

[@RattleCanCollective]

Absolutely the BEST and easiest to follow tutorial on this subject. Super glad you made this video my dude, subbed.

[@dirtniron]

Awesome, thank you!

[@colin55594]

Awesome finally someone showing the top screw adjustment.

[@xtazy1337]

Thanks man , after watching your video I've fixed my bike , I came home for a short vacation , no time for mechanics , I had to make a temporary insurance and i'm glad that the bike is now running otherwise I would have lost the money of the insurance... anyway thanks again :D you have a new subscriber :D

[@dirtniron]

Cool man, glad it helps. Welcome on board!

[@g.m_styling3571]

Best video ive found on this topic. Mine was way off, the bike wouldnt idle and bogged. Idles and rides sweet now!!

[@dirtniron]

Glad it helped, thanks!

[@okidwipanca5671]

Thanks for sharing, always a good thing to have more knowledge about our bikes. Usually when I tune my carb I turn the air screw all the way to the right make the gas richer, make the bike idle in 2-3 rpm and then I turn the air screw slowly to the left make it leaner until the engine idle at its highest rpm it could reach. When the idle rpm is not taking any higher when you turn the air screw counter clockwise thats when I know it's the right setting. Usually it takes 1.5-3 turns to the left to reach, more than that then I'd change the pilot jet size. After I get the air setting then I'll adjust the idle screw.

[@MPLSdunk]

Hey thanks for the video. I’m about to install a jd jet kit in my 200 exc. first carbed bike. Where do I start with the black idle screw?

[@danielmoolman2028]

Thanks a million! this video helped me out a lot, i just bought a KTM Exc 125 if i'm not mistaken it is the same as the one you used on the video, but in any case my idle was too low and always have to pull the choke when i'm not riding or keep my hand on the throttle so this video helped me out a lot i quickly set my screws and now it idles like a dream! thanks DirtnIron keep up the good work!!

[@dirtniron]

cool Daniel, glad I could help! Enjoy your ktm ;)

[@dillonwhall2986]

Daniel 😂😂

[@OBSBryce]

Used this video and got my 250sx to idle perfect today. So excited! Thanks for the videos Rado. 👍🏻

[@dirtniron]

That's great I am glad it helps. thanks for sharing bro!

[@andreicd3740]

Very good tutorial! Please tell me if for this tuning you have to have The engine cold or hot. Thank you!

[@danielschnydrig1761]

really good explenation but my bike has the problem that when its cold it idles but when it gets warmer i have to adjust the idle what coud that be?

[@nicoseli8305]

Very helpful thank you! One question, do you wanna have the bike at operating temperature before adjusting the carburetor? Sorry if thats a dumb question.

[@MachTuck]

Great!, would your method work on a Mikuni as well?? Thanks!

[@foil666]

Honestly, I find that tuning purely by ear will often lead to being in the ballpark, but not quite. I always like to run a tachometer - even a 5€ one will do - and zero out my settings. I will then pull out the air screw two and a half turns and three or four on the idle screw. That will usually get any bike going on a lumpy idle. Next I tune down - or up- the idle screw until I get something consistent at, lets say, 1500rpm and only then I start playing with the air screw. Screw it in a quarter turn and see what happens. If the idle goes up, then I'm in the right path. If the idle goes up, then I bring the idle screw out until I get a steady 1500rpm again. Wait a few seconds and give the air screw another quarter turn. If the idle goes down, then take the air screw in the opposite direction. Do not adjust the idle screw to compensate a low idle after a tweak on the air screw. Repeat until the best possible idle is achieved. From there, I will always screw out the air screw an 1/8 turn, just to keep things on the rich side and add some response. And that's about it. The over 3 turns, under 0.5 still apply, but this way you can be analytical in the process if you're just starting out and visualize the results of what you're doing. On four strokes I pretty much do the exact same thing. Tuning an idle on multiple cylinder carbs. Now that's a bit of a pickle :D

[@dirtniron]

Thanks for sharing Andre!

[@robivlahov]

on multi carbs you get a vacum gauge and just set them up the same . i do it at work its easy

[@nichso9019]

this one helped me so bad!! thanks

[@nevilleprice8797]

I've just come across this comment and was going to try it but just picked something up I thought I'd query. 2/3 of the way down you say ..... "From there, I will always screw out the air screw an 1/8 turn, just to keep things on the rich side" .... do you mean turn IN on a 2 stroke to make it richer, I believe turning out makes it leaner??? Also ... you set the idle screw so it's approx 1500 and then adjust the air screw, then adjust idle back to 1500 again and keep repeating until you get it right. As an alternative, from the 1500 rpm, couldn't you just adjust the air screw until you get the highest reading and turning it in either direction causing the rpm to drop, then give the 1/8th turn (in the correct direction :-) ) and only then adjust the idle screw to bring it down to the desired rpm? Sorry …. Not meaning to pick holes in your comment but this is all new to me and just trying to make sure I get it right rather than doing something to damage the bike.

[@foil666]

@@nevilleprice8797 you got me on the 1/8th turn. On two strokes (can also happen on some 4 strokes depending on the carburetor) turning out the air screw will make it leaner, not richer. Rule of thumb, it the screw is close to the intake, then it's an air screw. If it's close to the engine, then it's a fuel screw. "As an alternative, from the 1500 rpm, couldn't you just adjust the air screw until you get the highest reading and turning it in either direction causing the rpm to drop, then give the 1/8th turn (in the correct direction :-) ) and only then adjust the idle screw to bring it down to the desired rpm?" Not really. Usually at a fast idle resonance comes into play and things can get whacky.

[@nathan5270]

Hey I have the same bike is the choke setting have something to do with your idle I can only idle once I warm up

[@tylersmith8849]

My 1997 rm250 will not start by kicking it but it will if you bump start it but once you shut it off still have to bump start it any information is great thanks in advance

[@ipmoh86]

Bloody fantastic vid bro👍. I think i know why mines been bogging coz of me havn air screw all the way in and i have the same carby on my 2000 Suzuki Rm 250. It has that choke adjustor too. where should i have the choke adjuster turned to for these tuning proceedures?

[@dirtbikesfordinner3706]

Thanks video! Your advice worked perfectly with the general start point on tuning the bike, i kicked it once and it came on idled perfectly! 👍👍👍 Thanks

[@dirtniron]

Glad it helped

[@BikerBenny]

My friends 1998 YZ250 rattles just like this bike I just had the top end apart and the rod and piston had no up and down play. Do some bikes just sound rattly like this??

[@watts4200]

Best video for air screw/idle tuning 👌

[@rolandwheeler4842]

Great video and thank you for the clear explanation. My old DT175 had idle issues and I am at 1/2 turn out to get it to run close to correct. Could not figure out if I needed to go bigger or smaller on the idle jet. Your video explained it well and I used my jet drill set to open it up just a bit and not I'm 2 turns out and it runs perfect!

[@dirtniron]

Cool, glad the video was helpful! Have fun Roland 👍

[@electricaltyler5998]

I have a bad exhaust leak could that be part if the reason I can't idle. The exhaust system is going to all be replaced eventually needless to say it's vibrated loose from the frame. Also low end doesn't have much power but once rpms are up she rips

[@paiankur]

Thanks rado. As usual a very useful and inofrmative video. My beta 250 came with the float level set too high. It was leaking gas from the overflow a lot! Other than that, it seemed to run fine. Once I adjusted the float height lower, the leaking gas went away but now it has a slight bog only when giving it sudden and lots of throttle off idle. Everywhere else, it runs very crisp. I am going to play with the air screw now to see if that fixes it.

[@dirtniron]

yea, I think you should be able to adjust it with air screw, in not I thing go one size bigger on the pilot.good luck!

[@junaidyousuf8820]

I recently picked up a JR80. Once its hot and I come to a stop and press the clutch in (or even in neutral when hot) it starts to scream rpms go off the roof as if the engine is about to blow off. But as soon as I put in gear and go it runs. Is this an idle adjustment and fuel mixture issue or something else?

[@Thomasside299]

i got this kmx 125 that backfires on high rpm only, idles great. any tips?

[@ejdexsvk]

Does this increase the power of the bike?

[@fernanzayas2348]

Best tutorial bro. I was doing some research and I know that’s not something very complicated, but u make it so easy to understand ❤️🙏🏻 I got I very nice 2002 ktm 125sx 2 stroke. I be honest that bike is very in mint condition I know I just have to work with this things. The engine only have a fresh 27hr, a tons of new parts. But it bogging in lows rpm like 1/4 throttle before the powerband and torque. I don’t know if is something with the air or fuel. I put v force 3 reed cause I like trails so I just want some smoothest throttle and more power at the acceleration. I know maybe with the v force 3 it don’t gonna run very fast cause it make the bike more like low and mid range, but my bike top speed are just like 47mph. I think I should do a lil tune wt the air-fuel screw to see if it grab a little more power and stop bogging at lows rpm cause the bike have a nice powerband but that little bogging or si leak give me anxietys.

[@brandonevans6919]

Awesome video thank you! Do you have a video on adjusting the power valving on a 125, 2 stroke dirt bike?

[@StelzDwnUndr]

Best video on the internet thanks brother really helpful info.

[@dirtniron]

Glad it was helpful! thanks bro!

[@yywolfybih834]

hey man i bought a rm125 and it runs great idles etc but whenever i drive and give it some it ends up dying it out no too long after and the spark plug gets full of gas so im thinking its flooding but what could cause that need some help

[@GibbonsWorks]

Thank you for this! I have to borrow my Wife's ear to make sure that it sounds like my 2 stoke. Why I had to borrow my wife's ear? It's because I am deaf. She was telling me about the thumping sounds. So this video cleared it. Sames just the same as yours but needs some slight adjustment for lean or richer.

[@dirtniron]

Glad to help! good luck Arron!

[@GibbonsWorks]

@@dirtniron Thanks man! first time out riding it today and my spark plug got fouled. (I think) I hope so! lol I already cleaned out the carb and change jet, before I went out riding it. I rode it for only 3 hours or so.

[@GibbonsWorks]

@@dirtniron Hey Man, Please forgive my grammar, After 3 hours of riding, my bike died Fouled Spark Plug. Seems to be too rich. So, I can Turn it more to the left and then I can Adjust the throttle? if i did that, and it will be ok? As of right now when turn all the way to the right (less air) i only have it turn 1/4 not 1/2.

[@brendon8702]

@@GibbonsWorks how do you change gears, by the feel of the vibrations? Alot of people say you need to be within 1.5 to 2.5 turns (left) on the air screw ortherwise you need to change the PJ. The manual for 300exc Australia has 3.5 turns as it's standard spec.

[@GibbonsWorks]

@@brendon8702 Yeah by the vibration of high or low rpm. I have turned it to 1 full turn and 3/4. So, I hope that'll do it. I'll keep an eye on my spark plug to see if its either lean or rich.

[@jackdownen5825]

Are you listening to your exhaust or the motor?

[@dannerpineda8036]

Hey buddy Does the bike needs to be cold or warm to adjust the screws ? TIA

[@DeanFergusson]

I got the same bike. I can literally take the air screw out and it makes no difference, it won’t bog out unless I screw it all the way in tight. But between screwed completely in and taken out there it does absolutely nothing to the idle. Any idea?

[@theboogieman401]

Thanks man ! Do you have video of how to take the slack out the throttle mine has little bit to much play 2004 CR85r

[@dirtniron]

you have 2 places where you can adjust it, on the carb when the cable comes in and on the throttle at the handlebars

[@therazorfeind]

My dirtbike is hard to start it’s a 2001 cr80 it take 5-6 kicks and sometimes won’t start because I flood it any suggestions??

[@tomposkitt3244]

Perfect video thankyou very much my bike would not idle and this idea perfectly explained which screw in which direction does what and roughly where to set them bike idles perfectly now

[@dirtniron]

cool Tom, glad it helps!

[@BjerkeMoto]

Can the airscrew increase power?

[@GaryFoltyn]

Question: does it matter where the idle screw is set at, before you start adjusting the air mixture screw? Thanks in advance

[@dirtniron]

I would keep it somewhere in the middle, usually i dont touch it much. Maybe bring out a turn from where it is right now...

[@lelouchbritannia8728]

Hello. Right now I'm using 4strokes motorcycle. But I'm using 2 strokes carburetor on my motor. So which does it apply. Screw my airfuel screwmixture does it go richer or leaner

[@theguymaxqc]

my yz 250 was stock pilot jet 50 i dropped to 45 for good idle is it normal and my float height was ok

[@dirtniron]

hmm.. that seems little too much but I might be wrong, how does she run now? no bog off idle?

[@rickyjennings8627]

quick question. just bought a 01 kx 250 the bike ran great snappy response idled great! I took the carb off cleaned it checked the jets n clip just gettin to know the bike see how everything was set. I re installed & it wont start at all.. nothing and i done carbs many times in the past...i went 2 out on air and on black screw in some for higher idle then adjust to slower once running. won't start at all. any idea?

[@dirtniron]

something is not right, I would take it apart and check if the fuel is getting in the carb, clean the jets. Once I had my float stuck in closed position and it wont let the gas in my carb

[@rickyjennings8627]

@@dirtniron yep did all that and it fixed it! thanks!! runs great!

[@250ridr2]

I have a yz250 stock jetting 850ft in Pa, stock 50 pilot 178 main and fmf full exhaust. I put the new top end on and she wants to hang slightly barely noticeable then when i rev it the bike revs fine but pops some on decel. Stock reeds new pedals. Do i need to richen the pilot jet?

[@brodyhays3599]

So I just bought an rmx250 as a project bike, right when it gets into powerband it just falls flat on its face. They guy I bought it from said the power valve needs adjusted but I think it’s the jets. Should I try a smaller main jet or something else? Thanks

[@dirtniron]

I would first take the carb out and clean/inspect/rebuild whats needed.. then start with stock jets and see how it runs

[@abhimanyuinjeti5326]

Is there ring noise or piston slap?

[@tales0fangel]

my Yz125 2022 ( just 7 hours)keeps on flooding and fouling spark plugs. First I thought it’s because of the oil gas mix ratio and I changed it to 1:32 and changed the stock one with new NGK one. Ride it for 20 minutes and stopped. When I am taking the spark plug out it seems wet always. Can I fix it adjusting air screws/idle Any help please Thanks

[@dirtniron]

Yes. Try to play with it for sure. Those carbs have a problem with the gasket. I think JD jetting is selling them, I would get their jetting kit as well. I have good experience with their jet kits

[@ethanmarin6684]

Very helpful man people like you are awesome

[@martonandraskovacs8103]

6 years later, still helped me out!

[@Ghost_MuddyGang]

Where do u start with the black idle screw that’s where I’m lost lol

[@baseballa1639]

Hey, love the videos. You have very informative videos that are straight to the point. I have an interesting case that I am hoping you can help me with. I recently picked up a 1998 Honda CR250R 2 stroke. I live at 4000ft elevation, and the bike was bought from someone who lived at sea level. The bike runs absolutely great when started, huge amounts of power and immediate throttle response. I would just like to know how to tune the carb per elevation. I did what you did in this video with the 2 turns out, and adjusted the idle, and it seemed to run pretty good, but had trouble starting cold on the next start after. Wondering if its too lean? What I really would love is to figure out a good air/idle screw combo that can run good at my house, but also run good at sea level. Also I am running 32:1 with Motul racing oil. Prior owner was running 44:1 with around a 3/4 turn out on the air screw. From what I have been told though, you should not adjust your fuel/oil ratio...the manufacturer puts it there for a reason. If you are running too rich or too lean, you need to change jets. Any help on this subject would be very much appreciated! This is my first 2T, and god damn its a powerhouse. Just want to really get it restored and running as best it can!

[@AkaComeau]

I have my bike jetted perfectly or close to, 158 48 + carb tuned almost perfect. She runs fine. Great video :)

[@dirtniron]

Your bike sounds so great Joshua, music to my ears ;)

[@megagobby100]

Hi. Great helpful video😆 Which is best setting for idle screw to start with ? Thankyou 👍

[@dirtniron]

not quite sure, lets say 2-3 turns out

[@listomoto]

what is the purpose of that 2 hose on the upper part of the carburetor with its end hanging down

[@dirtniron]

just a vent..

[@listomoto]

@@dirtniron can i remove it? Or clogged it?

[@brunoaghitto9617]

hey my problem with my bike is that it idles ok but after i give it some gas in neutral it idles at higher rpm than before? pls help me

[@Luui2x]

Idk if the cable to long but i have a lot of play and it doesn’t wanna stay on idle neither

[@danielsanchez5568]

I need help fixing my bike I do not know what's the problem it turns on but when I put a throttle down it won't run