How carb jetting works | Offroad Engineered

[@ryanshout8652]

How do we know if the engine is runnning rich or lean? what about a lotta rich or a little rich and vice versa?

[@StepstoPodium]

That's something that can only be understood with experience. Meaning that you actually have to start messing with the carb to understand what it means a rich or lean mixture. One great way to get a good base on that is to change the needle's circlip position to its extremes. That way you will be able to feel what is a rich or lean mid throttle response and translate that feeling to idle and full throttle. But nothing replaces getting your hands dirty and trying out :) With carbs it's a little more dificult to understand these feeling than with suspensions because you don't feel it in your hands (quite literally) but you feel it in the engine's performance. A lotta rich will for sure get you foul plugs and too lean will make your engine heat up rather quickly! Hope it helped 💪

[@ryanshout8652]

@@StepstoPodium Awesome thank you! I ride an older 4 stroke, 2010 yz250f, so it's part of the pre-EFI era and carb tuning is part of my maintenance. I have taken it apart, cleaned it, thrown in a JD Jetting kit that worked well. Then I had a buddy loop out (he's ok, so it was funny...) which bent up the stock muffler so I replaced it with an aftermarket pipe. Now I need to tune the carb a little... this info will help!

[@StepstoPodium]

Let me know how it turned out! I would love to hear your findings and how the video helped you tuning it 😁💪

[@اشرفالبكري-ط7خ]

@@StepstoPodium آ

[@akhileshkumargajendra2661]

If top of Spark plug (sparking area) is clear and white it is lean . If spark plug has carbon black carbon layer on top it means rich mixture.

[@Whammo77]

I think I just learned more about a motorcycle carburetor in 6 minutes than I have in the past 40 years. Thank you!!!

[@StepstoPodium]

❤️❤️🙌🙏

[@csselement]

This is, by far, the best carb info video on KZbin (based on my research). Thanks, it was very helpful. What an amazing piece of engineering.

[@StepstoPodium]

Thank you very much! Hopefuly it remains so despite your ongoing research 😆 True indeed 👌

[@greyzoneofficial]

I would have to agree! Thanks!

[@akhileshkumargajendra2661]

If Spark plug is clear and white it is lean . If spark plug has carbon black carbon on top it means rich mixture.

[@robhayter484]

No shit

[@DavidPerez-ci6qi]

Thanks I didnt know that unlike the guy above. If only someone had said that to him every time he learned something new..what a jackazz

[@robhayter484]

My 5 year old niece would have known that

[@DavidPerez-ci6qi]

@@robhayter484 I bet. A real born know it all says the jacksazz

[@robhayter484]

@@DavidPerez-ci6qi melt

[@greggfuller2220]

Absolutely genius by having the graphics. In jet pilot School they use graphics similar to this to explain jet engine blows and the operational systems of the jet. The carburetor video is well above any class I've ever taken. Keep up the excellent work, good sir!!

[@StepstoPodium]

Thank you so much Gregg! 🙌🙏

[@neildxb]

This is the clearest explanation I have found for how carb jetting works! The graphics are a huge help. Thanks!

[@StepstoPodium]

Glad it helped! Thank you for watching 🙌

[@hardwaylearner]

best carburetor video on the internet

[@StepstoPodium]

Thank yoouuuuu 🙌

[@mikegentile13]

I agree. This explained sooo much!!

[@freedomforourfallen3755]

I’ve worked on carbs forever. This is a real good tool. I know to change things. So now I exactly what I’m looking at

[@StepstoPodium]

Glad it helped! 😄🙌

[@ultimateearrapechannel31]

for everyone who wants to know: a lean engine will be more silent and gives a slight delay at low throttle. so you pull throttle, and a second later your engine responds. a rich engine will have quick throttle response but gives bogging (on a 2stroke it is called 4stroking), so the engine makes a faster and louder sound, but the power decreases when its doing that.

[@jessejules2092]

Thank you

[@adeel.designer]

great !!

[@hhstarwars]

Why is it called 4 stroking? How does the engine being rich or lean in a 2-stroke change the crankshaft rotations? 😂

[@SammyFiggs]

How do I fix it. It’s happening to me

[@hungkhan]

​​@@SammyFiggsif rich lower the clip position until you the problem is gone, for the clean condition raise the clip

[@whx1xm]

You made carbs looks like a simple device XD Thanks a lot :)

[@StepstoPodium]

Ah ah! Thank you for watching 😄💪

[@joliver81]

Having the graphic to assist explaining how are carb works was very effective. This may be one the best carb videos online. Would love to see another related to float bowls and there method of operation. 👍good job.

[@StepstoPodium]

Thank you! Glad it helped! 😄🙌

[@matthewryan2048]

Loved it, A good base line explanation without getting too technical. Keep up the good work.

[@StepstoPodium]

Thank you! 🙌🙌 new videos are coming out at the end of the month 😁

[@chandudammalapati2726]

Dude your video is one of the best that explains how a carb works.. You literally killed explanation... I don't know If I am going to rejet my carb, but your video really helped to fix my carb..

[@StepstoPodium]

Thank youu!! Really glad to hear

[@danijuggernaut]

I´m not a beginner but i tell you this is the best video on YT for jet adjustement. See i power up my little 50cc two stroke to 75cc and i´m preparing well my first start. So people may thing on the first start you have to be cautious with too much rpm, but thats not true. Throttle up a two stroke means lubrication and thats what the engine needs at the first start with new cylinder and piston. But if you start up lean it can bring catastrofic consequences. So this video gave me the tutorial i needed. I adjust first needel to warm up the engine. To warm up we apply certainly one to three quarter throttle, so for that the needle is responsable and has to be the first adjustement. When this is ok i go for the idle by adjudting the air screw and jetting if necessary. The main jet will be adjusted on a longer ride with fully open throttle. Ohhh man, i got a plan, lol. Thanks a lot, greetings from Spain.

[@StepstoPodium]

Thaaank you Dani 🙌🙏

[@ziggy682]

The animated diagrams in the video are top notch. Even though i knew how the various circuits worked, it was helpful to see the visuals to really make everything click. Great job!

[@Cassiopeia_2113]

Holy crap this video is one of the best diagrams for the FCR carb. Its crazy how hard it is finding info on these machines haha, great video man seriously

[@derekrebel3384]

This really is a great video. All the info without overcomplicating things. Thanks.

[@StepstoPodium]

Thank you the kind words and for watching! 🙌💪

[@nigel2447]

Another great video. I am surprised by some of the negative comments. I just recently got back into bikes and two strokes. You gave an excellent foundational video. You are correct in saying it is time to go get your hands dirty, and I am sure guys can go do additional homework on tuning, plug reading, other means of figuring out how to dial in the carb. Also, being able to take feedback from the machine is critical.

[@StepstoPodium]

Thank you Nigel! True indeed 👌

[@ryanmurphy9201]

This is by far the best video understanding the carburetor. Thank you so much I will be following you from this point on.

[@StepstoPodium]

Thank you! Glad I could help! 🙌😄

[@paivma8820]

Да, отличный видос получился! Однозначно лайк и подписка. Ваш фолловер 😂)))❤😊

[@jonathanredman8497]

Excellent video with easy to understand graphics. Thanks for posting.

[@StepstoPodium]

Thank you for watching!,🙌

[@pauloguevara8646]

Congratulations for sharing this king of valuable content, this contributes to make the world become a well educated place

[@StepstoPodium]

Thank yooouuu 😄🙌

[@bansalartsagra3981]

one of the finest videos ever on the subject.

[@StepstoPodium]

🙌🙏🙏

[@DIYWilly]

Great video! Straight to the point and really cleared up the questions I’ve always had for proper carb tuning. Graphics helped a lot!! 👍 Thanks for sharing!!

[@StepstoPodium]

Awesome! Super glad I could help! 😄🙌

[@philatwood2086]

Excellent video with clear descriptions and explanations... Yes.. you video is worth 10,000 pictures.. Thanks..

[@StepstoPodium]

Thaaaaank you so much! 🙌😊

[@YoungPrior]

You did a fantastic job on this video. Very well done

[@AntiStressKit]

Luis, thank you for continuously and consistently providing quality content. It is time to stock up on jet needles :-)

[@StepstoPodium]

I thank you for never skiping a video! 🙌 Stock up and have fun 😁👌

[@FarRightRider]

Best carb video I've seen on here, thank you, sir!

[@StepstoPodium]

Thank you so much Stan! 💪🙏 you have a bunch of other videos jjst as good 😄

[@Camdouin]

That makes everything much clearer. Thanks

[@marcelsteinhauer4377]

Super easy explained and so clear after this video thx!

[@hotchihuahua1546]

The number one reason customers came to my shop . A clogged pilot jet on a carbureted bike . First indicator ! If you need to partially run your choke once the bike starts and it won’t idle well with the choke off . Do that enough and you eventually foul your plugs . Know the first signs !

[@topstar3]

Yet another brilliant video! Great work my man!

[@StepstoPodium]

Thank you!🙏 I'm glad you liked it! 💪💪 onto the next one 😁

[@mjl8115]

This is the most niche YT channel I've subscribed. I love your videos. And this is another great content. Keep on doing yours Steps to Podium, Luis. Cheers from Poland.

[@StepstoPodium]

Thank you so much! I really appreciate it M J L! 🙌🙌💪

[@simony5807]

Very helpful in visualizing and assessing my problem with adjusting my new nibbi carburetor. Thank you

[@StepstoPodium]

Glad I could help!

[@reggiepaulk]

Excellent explanation and diagrams.

[@StepstoPodium]

Thank yooouuuu

[@Jp11130]

Best video on how carb. Works Thanks

[@StepstoPodium]

Thank you!! 🙌🙌

[@NirHason]

I didn't watch it but I'm sure it's going to be gold.

[@StepstoPodium]

Thank you for that trust! 🙏🙏🙌🙌

[@AntiStressKit]

Nir, I watched the video and can confirm - it is pure gold

[@StepstoPodium]

🙏🙏🙌🙌 thank you Ariel! I really appreciate 💪 onto the next one!

[@uniquecattlefarm6146]

Well explained and very informative video with graphics to understand better. I hope you make another video for the best setting to get higher fuel average.

[@hellstrike007]

Good video. Really easy to digest too! Thank you for sharing your knowledge.

[@StepstoPodium]

Thank you for watching 🙂 there's a lot more on the channel eheh 😁

[@ironDsteele]

Thanks for the explanation. Tuning the RZ500 is still a pain in the ass.

[@niconine268]

Great explanation, illustrations & summary

[@StepstoPodium]

Thank yooouu 🙌🙂

[@OFFroadOFFcourse]

Oooh, I hadn't seen this one! Brilliant as always! I learned soooo much, man!

[@StepstoPodium]

Just came out, don't worry 😁 thank you for watching and I'm glad you learned something 🙌

[@AlexanderAfeldt]

Это первое видео где я смог проследить взаимосвязь между режимами, спасибо графикам. Я уже долгое время пытаюсь найти хорошую информацию по настройке карбюратора для своего VMAX 1200, все остальные видео представляет из себя в основном "бла бла бла". Спасибо большое. Если будет возможность хотелось бы видеть виддео подобного же плана, но уже с реальным мотоциклом и реальными настройками (желательно 4х цилиндровый). Что-бы можно было более четко проследить логику подбора. К сожалению не у всех есть под рукой стенд для точных измерений.

[@qazimtahir]

Really informative video. Thanks

[@akhileshkumargajendra2661]

You can adjust carburetor niddle up and down. It will give rich or lean mixture depend on niddle and fuel mixture screw. Niddle setting gives best acceleration response.

[@RwP223]

Heck yeah, needle is a big deal

[@ArcanoDCUO]

Mine is always bogging if i pull to fast... i tried everything...

[@juliansinclair2122]

Excellent tutorial.. brilliant!

[@JO3BID3N-is-a-P3D0]

thanks for the vid! now ill be able to jet my 2024 pgm-fi Honda!

[@shireproductions9499]

Great video. Thanks for the quality explanation

[@StepstoPodium]

Thank you for watching 😄🙌

[@therealrealshocker]

Excellent video! Thanks for sharing! 🙏

[@Kebekwoodcraft7375]

Super clear great job 👏 😊

[@nunogens]

Great explanation! 💪

[@StepstoPodium]

thank you for watching Nuno!!

[@Theferg1]

Great examples and video and info!! I'm definitely a new sub!!

[@StepstoPodium]

Thank you!! 🙌🙂

[@m4nzss3]

Thank you. Your video really help.

[@MuhammadAli-vd7xz]

Thank You for this video, informative

[@JosiahNielsen]

This video helped me so much thank you😊

[@StepstoPodium]

Thank you for watching Josia! 🙌

[@vancezx11]

Very well explained.

[@jamiestanley8774]

Will this explanition work for a road bike 4cylinder.

[@gavinnance4475]

certainly

[@track1219]

Good video! Also a float level set too high will make engine run rich.

[@freashtoast1684]

Legit exacly what I was looking for at 3am

[@rroz4762]

Great tutorial ! I have been trying to tune my carb for awhile , 1985 XL 350 , installed a Mikuni carb and mid and top end , after some rejetting are doing well , my issue is with the zero to 1/4 throttle , when riding it fluctuates too much , constant variation up amd down , choppy i guess might be the term , thoughts ?

[@Riofitro]

The way to set it is to look at the color of the spark plug after the motorbike engine is running... if it's wet or black it means it's wasteful, if it's dry it means it's economical.

[@karlitosmanbur9153]

Thanks.... Easy way to understand

[@StepstoPodium]

Thank you for watching 💪

[@Esparciadexfytchannel]

Nice brother❤❤ new support

[@anandblore10]

I have installed bigger pilot jet and needle lowered to 2nd position but there is light sputtering apart from that performance is very good. So due to sputtering I lowered needle to 1st position and sputtering stoped but less power in middle throttle position.should I change the larger main jet to gain more power or the larger needle to be installed with the circlip positioned to 2nd or 3rd depending on the performance Thanks

[@stanbeattie3958]

Very good video

[@motoric5188]

Excellent video! 👌

[@StepstoPodium]

Thank you!!-🙌🙌

[@RidingwithEthan]

Great video thanks for the easy explanatio ❤

[@StepstoPodium]

Glad I could help 🙂

[@billdegroot2087]

Most useful

[@osimnod]

Excellent video and the graphics really helped clarify what was happening and when. Question: is there a practical way to test this without fully installing the carburetor into the boots? I suspect not.

[@guywy8310]

great video

[@ericbenavidez992]

Best explanation 💯 Question: have a straight piped Honda shadow 1100 that hasn’t be rejeted and I’m in the process of it. How should I rejet it? In idle it’s to boggy and when I’m in mid rpm’s I have to give it more throttle

[@ville5152]

higher the needle!

[@Garage-gs5ch]

Mais um vez um excelente vídeo, com excelentes animações. Não esquecer também a afinação da boia 😉

[@StepstoPodium]

Muito obrigado! 🙌 é verdade, mas isso é uma afinação de manutenção e não de desempenho, que era o que queria incidir neste video 😉💪

[@endivas]

Mais um excelente video! Parabens e obrigado pela partilha!

[@StepstoPodium]

Obrigado eu por veres! 🙌

[@Dropsix]

Great video, thank you very much!

[@StepstoPodium]

Thank you for watching! 🙌

[@Steveman61]

Great video Luis, just one thing the needle jet is mounted into the jet block, not the slide ;-)

[@StepstoPodium]

Fair enough steve 😅😂

[@xt225]

Great video. Would have been perfect if went through the air/fuel mixture.

[@medardocalumpag4108]

Thank you Sir

[@sincityenduro4111]

Very good video, helpful 👍

[@StepstoPodium]

Thank you for watching! 🙌

[@greiner7414]

Great visual thank you!!!!! How about a O2 sensor for measuring air/fuel mixture as a tool?

[@StepstoPodium]

Thank you for watching! 🙌 It can be used, for sure 💪

[@nn-js4yg]

Thank you

[@momentsoftriumph1050]

What a fantastic, clear video. Am new to this and looking to help iron out some running issues with 4stroke 50cc gy6 ped. Issues being slow to pull away from standing, can almost die. Also some bogging at full throttle. Also generally slow. First I'll just do a carb clean. I'll then see how it runs. Depending on how it runs.... Is the first thing to alter is the needle size? Or does it not matter, but only change one thing at once? Thanks!!

[@emeraldviking3637]

Super Trooper 👌

[@docteroperation]

Hugely helpful. Thank you for sharing this knowledge.

[@StepstoPodium]

Glad I could help! 🙌

[@voyteks4668]

correct me if Im wrong,,, the pilot jet supplies fuel all the time. not only when the throttle is closed or partially opened. so the pilot jet can be used for very fine/final tuning.

[@sinner7947]

Can you make a video explaining flooding and how to fix?

[@StepstoPodium]

I really appreciate the suggestion, but I tend to make videos explaining how things work, not specifically what happens when things don't work 😅

[@Wesley..]

Hi Thanks for the video! I have a problem with a hanging idle. When i start the bike it just runs normal but when i give it a hand of throttle the rmp stays high and wont drop. When i pull the choke out and right after i put it back in it lowers down to the desired rpm. When i ride slow technical stuff and pull the clutch the rpm rises again and only drops when i let the clutch out. What do you think the problem is? i ride a crf250x

[@StepstoPodium]

Seems to lean to me!

[@MachTuck]

Great explanation of how everything works! Im having an issue, its a 2 stroke 490, feels good but when it gets warm/hot, the idle goes up and sounds like lean. I`ve heard those old YZ490 were impossible to jet right. Any suggestions? I live 3200 ft above sea level, just in case :) Thank you

[@marcellogarcia]

Very good 🇧🇷👍🏻

[@StepstoPodium]

Thank you Marcello! 🙌🙌💪

[@telo-cuento]

Gracias!

[@StepstoPodium]

De nada!

[@vladdehtyar7535]

Hey Thanks for the video 👍🏻 My bike seem to have a delay in dropping the rpm after I let go of the throttle while riding , Is that too lean or too rich mixture? It also seem to overheat a bit

[@StepstoPodium]

Definitely lean

[@lukaszobrebski4440]

My four stroke Yamaha 90 must be on quarter choke otherwise stalls. Would bigger jet hole help with that. Thanks for help

[@r_s_enduro]

What about thickness on needle for hot weather? Hot and dry.

[@williamwaitokia567]

Personally for me the way you explain is Golden mate You should teach school teachers how to teach kids. if you were my school teacher I would had learnt something and not left at 14 🤣

[@williamwaitokia567]

Every time I watch a clip I always feel like I owe you money 🤣Im definitely have to get on to some of your merch to pay for the knowledge you share.👌

[@StepstoPodium]

Thank you so much William!! 🤩 I really appreciate hearing that from you 🙌 It definitely helps the channel grow and helps me produce more content like this one, so I really appreciate it 💪💪😊

[@billmago7991]

If using an Amal concentric, the needle jet wears, probably on other brands too

[@edza_lol]

I have problem I can start my bike and its runs but when I give full thotrle it stops runing what I need to change ignition is good I can't understand the mixture is lean or rich help me pls.

[@gavinnance4475]

im sad to see no one has extended their knowledge to help you. assuming you have cleaned your carb and what you say is true, i can infer that your bike is running too rich!

[@32srt32]

idles fine runs fine through mid to high end but from idle to crack wide open throttle, i have a bog that chokes the engine. but if i ease the throttle it runs fine.

[@Me23-e4u]

I have a 2002 blaster and I took off the air box lid and I was told to re-jet my carburetor my main jet is stock when I re-jet do I go up in size or down in size

[@chrismalton1904]

Great video thanks. Just a question if that's OK. When travelling down hill on my 2 stroke Beta Xtrainer 300 with the throttle fully closed I get a lot of surges, so much so I often pull the clutch in. What's the cause of this. Many thanks Chris

[@coyoteserranoband]

Are both jets supposed to work at the same time? For a 2 bbl? Or is one a idle jet and the other a main jet.

[@YungMar650]

How do you make the throttle crisp when I blip it it bogs when I rev it slowly it’s fine?

[@FOOLO8]

So should i start with pilot jet to stop black spark plug and white smoke.. i already dropped the needle as far as it can go. But i still got white smoke and black spark plugs while just running the bike in idle for just a few minutes