The BEST Way To Fine Tune Idle Mixture Screws For Your Carburetor

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  • เผยแพร่เมื่อ 8 พ.ค. 2024
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    In this video we will hammer down on a tuning technique that took me years to understand. Not only is it super practical and easy to grasp. It can be applied to any carbureted combustion engine. I don't care what make or model you have. From lawn mowers to motorcycles this is the best way to dial in your carburetor for a fine tune adjustment for your Idle mixture screws.
    Enjoy!
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  • @lucas_bryz
    @lucas_bryz 23 วันที่ผ่านมา +32

    I have spent 20+ hours trying to get my dirt bike to run, trying to learn carbs. This video is a godsend and now my bike is running right!

  • @davesbikes
    @davesbikes 7 หลายเดือนก่อน +266

    Thanks for the explanation of hanging and high idle slowly returning to normal being a lean condition, and low idle creeping back to normal being a rich condition. These types of tips bring it back to the basics and make it much easier to understand. Much appreciated.

    • @mohdfarizkamarulzaman2081
      @mohdfarizkamarulzaman2081 6 หลายเดือนก่อน +9

      Yes this is the one we’re looking for. Couldve started the video from 7min onwards

    • @alangills-zq5hk
      @alangills-zq5hk 5 หลายเดือนก่อน +3

      Excellent Instructions keep on teaching

    • @-DarkKnight-
      @-DarkKnight- 5 หลายเดือนก่อน

      @@mohdfarizkamarulzaman2081BBC bbq big gvvv

    • @didisenpai5562
      @didisenpai5562 4 หลายเดือนก่อน +3

      Hanging also can happen from a leakage on intake parts

    • @justinfree2512
      @justinfree2512 หลายเดือนก่อน

      Very thorough and informative. Thanks🤘

  • @afinacionymovimiento
    @afinacionymovimiento 7 หลายเดือนก่อน +149

    I don’t think you talk to much. I find your descriptions extremely helpful. One of the reasons why I watch your videos. The explanations are great and so helpful!

    • @justinh1245
      @justinh1245 7 หลายเดือนก่อน +1

      Agree!

    • @edskipper1
      @edskipper1 6 หลายเดือนก่อน +4

      I do think you have too much to say, just get down to the job in hand. Thanks.

    • @jorgepizarro8142
      @jorgepizarro8142 2 หลายเดือนก่อน +2

      I concur. I'm a d.y.i type of person. Love the way/why you explain things. Stay blessed

    • @spila123
      @spila123 2 หลายเดือนก่อน +1

      Very well explained, eventually, but no need for the: "I Will be talking about this and this and this". Nevertheless, thank you very much!

    • @donbrowse7980
      @donbrowse7980 7 ชั่วโมงที่ผ่านมา

      Great video, just rebuild my carburettor and upjeted it for i fitted a open air turn out exhaust, could not find my colour tune so fallowed you instructions to a T and bike is running perfectly. Also what would your options be on using the colour tune ? Do you think they are any good?.

  • @FrankLowe1949
    @FrankLowe1949 6 หลายเดือนก่อน +140

    I am 74 years old and have doing it for 55 years. It works exactly like that for cars as well. We call it the sweet spot.❤🎉

    • @jerryhatley5004
      @jerryhatley5004 6 หลายเดือนก่อน +5

      I’m 72…you’re the old man with the wisdom…I’ve been working on motorcycles since 72….not quite as long (lol) but you’re absolutely right! Worked on my ‘72 gto in ‘72…..

    • @michaelneighbors9047
      @michaelneighbors9047 6 หลายเดือนก่อน +9

      I learned to tune carbs from an wise old man in 83 just after highschool.
      Works for any carb I have ran into since.

    • @nealp.2841
      @nealp.2841 6 หลายเดือนก่อน +2

      Yes sir!! Just finished tuning my '67 Mustang GT!! I upgraded the exhaust and changed the intake so it needed tuning.. got it right to the sweet spot once I figured out the electronic choke issue I was having.. I'm about ready to fuel injected with the Holly system!!

    • @mox399
      @mox399 4 หลายเดือนก่อน

      99 years old

    • @matthewbeaver5026
      @matthewbeaver5026 3 หลายเดือนก่อน +1

      ​@@michaelneighbors9047just know that not all carbs are the same.
      I use to think i understood how to do one. Then ended up with a 4mix sthil weedeater which is entirely diff from the 1½ turns each and walk em in from there i was taught on most any other 2cycle.

  • @blipco5
    @blipco5 7 หลายเดือนก่อน +123

    Cody, you’re not talking too much. The person that would make such a comment has both an at attention span of one minute and a motorcycle that runs like crap. Keep up the good work.

    • @TheMotorcycleMD
      @TheMotorcycleMD  7 หลายเดือนก่อน +12

      Really
      Means a lot man thank you for that encouragement

    • @davidenriquez4965
      @davidenriquez4965 2 หลายเดือนก่อน

      @@TheMotorcycleMDt CD mp
      Pno

    • @jonocasey5286
      @jonocasey5286 2 หลายเดือนก่อน

      Hi bro u got any vids of doing carbs on a 87 honda magna or any thing similar 4 carbed

    • @dean3434
      @dean3434 หลายเดือนก่อน

      I fully agree. I can see that you would be a great instructor!
      Dean
      Retired Teacher

    • @adrianobastardi
      @adrianobastardi 22 วันที่ผ่านมา +2

      Actually, he rambles on and on

  • @olfatskootch
    @olfatskootch 3 หลายเดือนก่อน +68

    Holy crap I'm 67 years old and I finally learned how to tune a freaking mikuni. Thank you very much you don't talk too much you talk just right and tons of information. Again thank you very much I'm a subscriber now

  • @EricKimbel-ji6vq
    @EricKimbel-ji6vq 2 หลายเดือนก่อน

    This has been the most helpful video I have viewed so far about personal motorcycle maintenance. Thank you

  • @amybinder399
    @amybinder399 16 วันที่ผ่านมา +3

    Your explanation simplifies what was a mystery to me for years. Took 2 minutes to set my bike up and it runs awesome now! Thank you Cody.

  • @zilla591
    @zilla591 7 หลายเดือนก่อน +4

    Glad you made this, I have a friend who's having some trouble understanding carbs so i sent this his way

  • @lucasemiljensen4472
    @lucasemiljensen4472 2 หลายเดือนก่อน +3

    I've always struggled with adjusting the air, but you just explained it in 15 minutes. Love your videos!

  • @user-gw1su3yz6d
    @user-gw1su3yz6d 7 หลายเดือนก่อน +1

    I do not think you talk too much! Enjoy watching you explain things I seem to understand. (great job man) Thanks

  • @user-fz4tz4nd3d
    @user-fz4tz4nd3d 6 หลายเดือนก่อน +5

    Great video, very well explained. Fantastic for the generations who didn't grow up with carbs.
    This will help to keep our muched loved machines used and loved for generations to come.

  • @user-vr8wr3xt1s
    @user-vr8wr3xt1s 6 หลายเดือนก่อน +94

    Great advice, clear for those who just want to tinker at home! One note however; As a bike mechanic I've always been with the understanding that once you've found that sweet spot where the engine idles at it's highest, we should go clockwise 1/8 - 1/4 of a turn to make the mixture is ever so slightly rich. The rpm will still drop back great to idle (you wont notice), and it's a general rule of thumb that a teeny bit too much fuel is better than a teeny bit too much air. It keeps everything a little cooler. Engines always run most efficiently when running slightly lean (also in terms of power output). The down side of this of course is that it produces a more risky, hotter combustion. We don't need maximum power efficiency at Idle, and for this reason it's better to always adjust that 1/8-1/4 turn in. Keep up the good work!

    • @desmo8755
      @desmo8755 6 หลายเดือนก่อน +2

      Maybe if the ignition is strong enough at idle. Can also foul plugs and soot things up so I like to go a little lean at idle as a result. Not much. There’s so little fuel at idle and no load, so the lack of the extra piston cooling won’t matter.

    • @draizwrm
      @draizwrm 6 หลายเดือนก่อน +8

      ​@@desmo8755
      At summer temps of 100+ stuck at stoplight in traffic, with air cooled engine, I'll take every bit of possible engine temp reduction i can get

    • @desmo8755
      @desmo8755 6 หลายเดือนก่อน +2

      @@draizwrm I hear you but it’s funny because I go a little lean because I don’t want the engine to load up … mainly for hot days idling. Depends on the machine and ignition I guess. I have a couple of old bikes and especially 2 strokes that do not like a rich pilot circuit. They may run OK for a while and cold-start well but the plugs will start getting dark if they’re idling on a summer day. Would be interesting to see how much hotter a lean burn causes at idle. Under load lean is bad, for sure, but I suspect the engine temp doesn’t change much with a lean idle. I might probe one sometime and see. And all my stuff is air cooled even an old beetle so I totally read you. If you have any test info or something let me know.

    • @draizwrm
      @draizwrm 6 หลายเดือนก่อน +3

      @@desmo8755
      I can understand your reasoning on two strokes, i used to buy and sell little Honda 2 stroke bikes, generally the exhaust would be clogged with carbon , the sparkplug fouled,
      my bike is four stroke, a 2009 i bought in 2011 from the first owner, it hasn't seen an open highway in several years, it does see urban city traffic everyday , it is my primary mode of getting around town, i have no test data, or reference links

    • @605pilot
      @605pilot 4 หลายเดือนก่อน

      I always thought that if it’s running lean at idle then it would run lean at full power. Throttle and mixture control are two different things.

  • @hoody0778
    @hoody0778 3 หลายเดือนก่อน +1

    Cody your detailed description is perfect for me, ive listened to so many & still have to pause play pause play whilst im working on my bike. I was starting to think ive got a problem until i watched one of your videos on carb tuning & it was perfect, so thank you great work...

  • @LloydWilson-km8iu
    @LloydWilson-km8iu 3 หลายเดือนก่อน

    You are the man. Best carb advice ever! Talk all you want. Your videos are the best

  • @emfl4437
    @emfl4437 7 หลายเดือนก่อน +5

    This was totally helpful. I am troubleshooting a DR650 carb. Based on your video, the carb was running rich. I got the carb dialed in now. Thank You! 🏍️✔️

  • @mikestackhousemusic
    @mikestackhousemusic 6 หลายเดือนก่อน +19

    Couple of things. Not bad. However, do not blip the throttle. When you blip the throttle, slide goes up feeding fuel, and then drops cutting off air. It results in a rich mixture. The best way to adjust the pilot/low speed circuit is to stabilize the idle/warm engine, set the idle speed, and then start turning the mixture screw either in or out. (It doesn't matter which) if the idle drops, you're going the wrong way. If the idle goes up, reset your idle screw to bring the idle back down and repeat. You want to get to the point where turning the mix screw one way or the other either makes it worse or does nothing at all. That's your sweet spot. Much harder with a multi-cylinder motor. As for your comment about air screws being more sensitive to adjustment, it's likely because, if the carb has an air screw, it's probably either an old street bike or something that the EPA didn't require a fine adjustment. Because of this, the taper is fatter and produces a more pronounced change with the turn. The EPA carbs had a long slim taper. (Really easy to screw them up if you turn them in too hard so be careful) They require a lot more turns to equal what something like a 1/4 turn on a non-EPA carb would take. You also mentioned compression but left out valves. A tight valve, bad seat/valve is going to throw things off so, before adjusting a carb, make sure the valves have been adjusted and the engine run. Lastly, in the 80s Yamaha made dealers purchase Allen exhaust gas analyzers. You'd install fittings in each exhaust and get a reading from a single cylinder. None of my co-workers used it but I got familiar with it. Yamaha specs were out to lunch, but I figured a great way to use it. I received lots of favorable comments from my customers when they got their bikes back. Probably the biggest take away I got from using it was, after the carbs were set on the machine, I'd check turns out from seated. These were the thin taper screws, but they would range anywhere from 1 1/2 to as far out as 3 1/2 turns! (2 1/2 was baseline) It all depended on the seat in the carb and how badly the factory had wound the screws in. (I'd actually find some that were completely seated!)

    • @williammathias1441
      @williammathias1441 4 หลายเดือนก่อน +1

      Thank you Mike. You just fixed my low idle and backfire issue. A diamond Gentleman :)

    • @elmeradams8781
      @elmeradams8781 4 หลายเดือนก่อน +1

      Do you change the low speed jet if your fuel/air screw is to far in or out?

    • @mikestackhousemusic
      @mikestackhousemusic 4 หลายเดือนก่อน

      @@elmeradams8781 you can.

    • @fester16100
      @fester16100 11 วันที่ผ่านมา

      Where is yur shop?

  • @davidcastanedajr3773
    @davidcastanedajr3773 6 หลายเดือนก่อน

    Thank you so much, probably the best carb tuning video I've watched so far! really appreciate you sharing your knowledge and experience with us

  • @diyfamily6848
    @diyfamily6848 6 หลายเดือนก่อน +1

    Great informative video from someone who knows what they are talking about and not just guessing or parroting someone else's infomation.

  • @TornadoCAN99
    @TornadoCAN99 7 หลายเดือนก่อน +14

    Good info here. I have been using a ColorTune see-through spark plug from Gunson to set the idle mixture....by watching the color of fuel burning in the cylinder. Yellow glow is too rich, white is too lean, good deep blue is the ideal mixture.

  • @snow8581
    @snow8581 6 หลายเดือนก่อน +58

    As a retired mechanic (who still rides) I think this is an excellent video. I have worked on everything from motorcycles (mostly kawis) to automotive to heavy truck /heavy equipment and that was a great description on carb operation and idle tuning. Happy to subscribe to your channel and look forward to viewing other carb vids. Congrats.

    • @TheMotorcycleMD
      @TheMotorcycleMD  6 หลายเดือนก่อน +6

      Thanks for the encouragement man! Happy to have you with the channel

    • @cheedam8738
      @cheedam8738 6 หลายเดือนก่อน +2

      Hey man I have a question, does the idle screw also affect low rpm power or do I still need to change the pilot jet? Thanks 👍

    • @sonnydozier2323
      @sonnydozier2323 หลายเดือนก่อน

      I need a mechanic

  • @nbrettoner
    @nbrettoner 7 หลายเดือนก่อน

    Really good much-needed tutorial video. Thanks Cody.
    🤠Greets from Australia (200,000 miles circa 1962 - 1976, then 2-3 yrs about 16 years later on)

  • @bm4138
    @bm4138 5 หลายเดือนก่อน

    Thank you. This really helped a lot. I work on a lot of small cheap carburetors that don't necessarily do what you think they would. With this information it made it a lot easier to figure out what was happening since most come without any idea of what they are and if air or fuel screw. Again thank you for making it a little easier.

  • @quadtraxxx
    @quadtraxxx 6 หลายเดือนก่อน +4

    Perfect! 👌 Very well said, very clear and with practical example, brilliant.

  • @maxbertrand1313
    @maxbertrand1313 7 หลายเดือนก่อน +1

    This is the best carb tuning video i have been able to find. Great explanation and real-time example

  • @Bob489
    @Bob489 7 หลายเดือนก่อน +2

    First time I ever understood how to actually do this. I also love the fact that you don't care what type or brand of motorcycle the viewer is riding and instead make everyone feel welcome.
    You have my sub to the channel, now I'm off to find a video of your on how to clean a carb properly, as that's where I'm currently at with my 1988 Yamaha YZ125. Thank you! :)

    • @TheMotorcycleMD
      @TheMotorcycleMD  7 หลายเดือนก่อน

      Thanks for hanging around Robert!

    • @iancameron198
      @iancameron198 6 หลายเดือนก่อน

      ​@@TheMotorcycleMDI have a 1974 ST90 Honda and need a recon head and jug can you help me locate these parts .thanks

  • @StandonBiznessofficial
    @StandonBiznessofficial 4 หลายเดือนก่อน

    Bro Thank you this video is one of the only videos that actually gives detailed info on how to tune your carb and what to look for the correct way right on Brother! Blessings🥂💫

  • @justindtackett
    @justindtackett 17 วันที่ผ่านมา

    Love your attitude and willingness to help us out with taking care of our motorcycles.

  • @jeffspooner7637
    @jeffspooner7637 2 หลายเดือนก่อน +18

    As a retired industrial engineer and maintenance manager I have worked with hundreds of people over my 45 year career. The key to teaching someone ANYTHING related to mechanics or industrial automation or most any other field, is to not only teach them what to do and how to do it, the most important thing to teach them is the WHY you do it! Teaching them the theory of how anything is supposed to work helps them to understand the WHY! Without the theory behind what they are doing they are just memorizing a few basic steps ie when I see this I do that. You sir are very good at teaching the theory of operation along with the what and the how. Keep it up!!

    • @TheMotorcycleMD
      @TheMotorcycleMD  2 หลายเดือนก่อน +2

      I appreciate this post. Many people bag on my lengthy rants. I get it, sometimes I repeat myself in three different ways lol .
      What everyone needs to remember is that I am a technician at heart. For me to fix something I have to know how it works. Just like you said. So my videos organically come from that angle. The why to me, is more valuable. I assume everyone thinks like that. But in actuality I’ve learned that it is what some people care less about on TH-cam.

    • @GBCobber
      @GBCobber 27 วันที่ผ่านมา

      Yes, great point. I wasted years trying to teach people the first thing without explaining why they need to know it.
      Guess I thought it should be obvious that if you dont know the first thing, you don't sufficiently know anything.
      And No, this is not a disguised insult. I'm serious. The first thing is potential. The only property of the first, fundamental, and only necessarily eternal principle and absolutely unbrekable Law: Allowance. The idea Yes is fundamental to anything and everything. Only telling you because as an enginner, you may be able to appriciate the lonly real Law.

  • @proamericanstoptyranny1260
    @proamericanstoptyranny1260 6 หลายเดือนก่อน +16

    ppl really complain about u talking to much. these are how to vids, i hate how to vids where u don't get enough information. ppl just like to complain

  • @jeremyfasulo2974
    @jeremyfasulo2974 6 วันที่ผ่านมา

    You sir are brilliant. I actually understand the process now to DIAL IT IN!!! Thank you very much.

  • @pkuudsk9927
    @pkuudsk9927 5 วันที่ผ่านมา +1

    The biggest mistake I see, on older bike epically, is when people don't check the intake manifolds and chase their tail trying to tune carbs. Alway spray water at the intake rubbers before you touch any screws air leaks will cause high Idle, as you spray water the idle will drop.
    Excellent video you made son. This works on every carburetor ever made on any motor. You want the highest idle with the lowest slide setting you can get with that back to idle quick. It's a lot of trial and error. No 2 carbs act the same so the book is just a rough starting point. If you live on a mountain or by the sea everything changes.

    • @TheMotorcycleMD
      @TheMotorcycleMD  5 วันที่ผ่านมา

      Bingo! Thanks for the feedback. I’m hoping this one helps a lot of people.

  • @DennisH22A
    @DennisH22A 7 หลายเดือนก่อน +8

    I always did the highest rpm at idle and it has usually worked for me. Warm it up, then set a reasonable rpm for idle then fiddle slightly with the needle until you get the highest rpm possible.

    • @karlkemble2273
      @karlkemble2273 หลายเดือนก่อน +1

      Or highest manifold vacuum

  • @Mannhael
    @Mannhael 6 หลายเดือนก่อน +7

    Your explanation of the lean and rich conditions of the how the engine operates was fantastic. Never had it explained that way to me and then backing it up with actual examples just really solidified it for me. Thank you so much!

  • @richardjaworski5339
    @richardjaworski5339 13 วันที่ผ่านมา

    Thank very much, you are the first who spoke logic into this situation. No you not talk to much, you explain things.
    Thank you very much.

  • @formegolf
    @formegolf 6 หลายเดือนก่อน +1

    Hey, great videos, I just wanted to tell you that this technique has helped me with my project and now I will be using this method for all my build. Thank you so much for making this video and sharing your knowledge. Have a great day! Mark

  • @heathcarr1105
    @heathcarr1105 6 หลายเดือนก่อน +7

    All of your info is accurate, if i ever had to go past 2.5 turns out on the fuel screw though id always go to a larger pilot then start over to prevent the chance of the screw vibrating out over time. I personally dont feel like its got enough spring tension to hold the fuel screw in long term past 2.5 turns out.

  • @DrJekyll-qz7xh
    @DrJekyll-qz7xh 7 หลายเดือนก่อน +10

    First off, i love the fact you “talk to much” i have learnt more from you, than for ANYONE on youtube (proud to call myself an MD member)
    This vid explained so so so much!! Keep them coming 😊 they are AWESOME!

    • @TheMotorcycleMD
      @TheMotorcycleMD  5 หลายเดือนก่อน +2

      Super encouraging to hear this man thank you

  • @clarkfamilyvideo207
    @clarkfamilyvideo207 6 หลายเดือนก่อน

    I’ve truly enjoyed and appreciate your videos. Thank you for all your help working on my carbs. I’m not sure who or why someone says you talk too much. Details are needed when explaining how to instructions.

  • @richwiebe8084
    @richwiebe8084 7 หลายเดือนก่อน +1

    Your carb tuning tips are priceless! Thanks! Now if I can just remember all of them. A Mikuni HSR specific tutorial with explanation of all of the circuits would be awesome, too.

  • @CycleGeezer-cq9lm
    @CycleGeezer-cq9lm 6 หลายเดือนก่อน +3

    Very well explained procedure, then emphasized with a well presented actual example of the procedure. I'll have to begin watching more of your videos. Very impressed! I am getting ready to begin some restorations on several bikes I've collected thru the years. This type of information will probably be really useful. Thanks so much for presenting your videos!

  • @chetweedsly6879
    @chetweedsly6879 3 หลายเดือนก่อน +6

    You definitely do not talk too much, I would literally pay for this information I mean you explain it so well, better than most people. Thanks a lot brother!

  • @spartan5921
    @spartan5921 7 หลายเดือนก่อน +7

    Keep on talking, that's the best way we can learn anything. Great timing, I am just doing a single cylinder carb clean on my bike and this was the second video of yours I have got notice on. I'll be researching your videos to check what you have there...Thanks from an older biker who forgets too much. All the best from Australia.

  • @markhoward3755
    @markhoward3755 7 หลายเดือนก่อน +7

    Your video could not have come at a better time. Tuning my rebuilt carb on my CM400E today. Thank you so much!!

    • @irocss85
      @irocss85 7 หลายเดือนก่อน

      I got a cm400t and I'm about to do the same. You mean carbS right? Lol.

  • @tayloroneill2332
    @tayloroneill2332 2 หลายเดือนก่อน

    Thanks i put new exhaust on and had lean issues good to see someone explain attention to detail well explained

  • @user-22-
    @user-22- 5 วันที่ผ่านมา

    Wow, this really helped me understand how to dial it all in.. finally! Well done!

  • @George-ie1si
    @George-ie1si 7 หลายเดือนก่อน +12

    Hi Cody
    Greetings from NZ, I have slowly learned how to rebuild and sync my carburetors but haven't yet mastered the fuel mixture adjustments. Thank you for sharing your knowledge with me, I appreciate what you do.

  • @georgesteffens7489
    @georgesteffens7489 7 หลายเดือนก่อน +10

    I’ve watched your other videos that include mixture adjustments, glad to see you bring it back to light. In the past I never knew how it was supposed to be done. Thank you for sharing!

  • @jj.cv3103
    @jj.cv3103 3 หลายเดือนก่อน

    All I can say is thank you. Been searching for a good video like this for my kart build. Real life saver ❤

  • @droidster888
    @droidster888 7 หลายเดือนก่อน +2

    Great explanation! Pretty much how I do my Amal’s on my 76 Bonneville. I’m gonna double check them again listening closer to how they come back to idle, thanks man!

  • @claytonbenes7774
    @claytonbenes7774 6 หลายเดือนก่อน +4

    You are looking for the highest idle with the mixture screw, which allows the slide to be adjusted to the most closed position which will reduce run on etc. The highest idle is the most efficient air fuel mix poss, hence why it idles the highest with the correct mix. If the screw ends up in to far or out to far to gain that highest idle then it is a guide to know which way to change the pilot jet to suit.

  • @stevestowell-virtue3781
    @stevestowell-virtue3781 7 หลายเดือนก่อน +3

    I've been working on carbonated engines (controlled fuel leak) for 60 years. I was predicting every move you made. Great video.

    • @littlereptilian7580
      @littlereptilian7580 7 หลายเดือนก่อน +2

      Like a soda carbonated

    • @stevestowell-virtue3781
      @stevestowell-virtue3781 7 หลายเดือนก่อน

      @@littlereptilian7580 gotta love spell checker! It makes sure the words are spelled eight, even as it changes the word to something completely nonsensical!

  • @simonplant3411
    @simonplant3411 11 วันที่ผ่านมา

    Thanks for this video.
    I've struggled for years to do this. After your video, I finally understand it.

  • @FrankiesWorld
    @FrankiesWorld 5 หลายเดือนก่อน +2

    Wow, I have learned a lot from this video. Doing a carb cleaning right now and wanted to make adjustments to the air/fuel mixture screw and now I know what to hear for. Thank you!

  • @jonnoMoto
    @jonnoMoto 6 หลายเดือนก่อน +4

    I just set the idle speed screw a bit fast, keep adjusting the idle mixture until the engine is at its fastest then richen the idle mixture by 1/4 turn and readjust the idle speed back to normal.
    However, on my 2stroke bike, I set it lean and leave it there. Not bothered by a hanging idle and it prevents the engine being fluffy from oiling up a bit when running slowly in woods.

  • @salvatoregiovanni8967
    @salvatoregiovanni8967 7 หลายเดือนก่อน +30

    Would be interesting (for those of us who like to nerd out) for you to take a wideband o2 sensor and see where the mixture sweet spot ends up being on a gauge after you tune by ear as shown here. I’m guessing this method would produce mixtures around 12.5-13.0:1 air fuel ratio for pump gas.

    • @1crazypj
      @1crazypj 6 หลายเดือนก่อน +3

      For maximum performance, 13:1 is common on street engines.
      It may get richer a when accelerating as rpm is still building.

    • @1crazypj
      @1crazypj 6 หลายเดือนก่อน +2

      @@greatestevar Depends if your air or water cooled and if your using an over rich mixture to compensate for bad combustion chamber design (extra fuel to prevent knock)

  • @keithgreene2007
    @keithgreene2007 10 วันที่ผ่านมา

    Thanks for this video. I was trying to tune a new scooter carburetor and had it ever so close but not exactly set right. Your advise on listening for the difference finally allowed me to get this carburetor spot on. Thanks!

  • @miguelpagansr6128
    @miguelpagansr6128 7 หลายเดือนก่อน +2

    I’ve been working old bikes for decades and just when I thought I’ve seen everything I guess I haven’t, thanks for the amazing information on this. The main thing I’ve learned about carbs is that to listen to your bike it’s what I tell all my friends. Believe me when you listen to her, it pays off in the end.

  • @tudorXcorbul
    @tudorXcorbul 7 หลายเดือนก่อน +10

    Nice video and good explanations.
    Although as a generale rule you can tell what you are adjusting (air/fuel) depending on the position of the screw, there are exceptions. For example my Honda 50cc Joker which has an air adjusting screw but positioned on the 'fuel' side of the carburetor.
    What is worth mentioning is that a 100% way to determine what kind of adjusment you have is the type of screw tip you have. If you have a conic shaped end of the screw it is an air adjustment screw. If it ends with a very thin needle shape then it is fuel that your are adjusting.

  • @Axelfoley009
    @Axelfoley009 7 หลายเดือนก่อน +5

    Hey Cody, thanks for your video and tips. Though you picked an easy one by working on a bike that only has one carburator. This technique is pretty hard to apply when working on a 4 or 6 cylinders engine. After years of trying this I finally came to the conclusion that the only (easy) way to fine tune the idle mixture screws is to use a colortune where you can see the color of the mixture when exploding in the cylinder.

    • @anonimous2451
      @anonimous2451 7 หลายเดือนก่อน

      Totally concur. Using a simple single carb while making it easy to see, hear and understand, simply does not apply well to multi carb setups. Whether that is 3,4 or 6 carbs.

    • @grebermuncie3904
      @grebermuncie3904 7 หลายเดือนก่อน

      Yep. Adjusting multi cylinder pilot (fuel) screws all at once and then judging results by how engine returns to idle is wrong. Carbs must be synced first and then each one adjusted one at a time while correcting carb sync and idle speed as you go along. Honda's method is called an "idle drop" using an accurate tach to determine proper adjustment but having a good ear is very helpful. Ex Honda Ser. mgr. @@anonimous2451

    • @jeffreystroman2811
      @jeffreystroman2811 7 หลายเดือนก่อน +3

      What is a "color tune" a movable O2 sensor or are you just referring to the plug porcelain tone after a short run with new plugs, or something else?

    • @anonimous2451
      @anonimous2451 7 หลายเดือนก่อน

      @@jeffreystroman2811 It's a Tool. Google it. u will see

  • @robertedge6902
    @robertedge6902 14 ชั่วโมงที่ผ่านมา

    Thanks for this lesson. Just put a new carb on my bike. This will help me get it perfect.

  • @joeespo3599
    @joeespo3599 6 หลายเดือนก่อน

    I use this method all the time back in the day when I started on motor with a carburetor works very well by listening at feeling the Motors 45 years easy

  • @sky-im6zg
    @sky-im6zg 7 หลายเดือนก่อน +3

    Hi love your channel, have you ever tried welding wideband bungs and testing carbs AFR? I have AEM x sensor and two welded bungs to tune the carbs in all RPMS and i have found that my old Suzuki is way more sensitive for lean mix than rich. When you are leaner than 13 idle drops clearly, above 13,5 it start to pop. Between 13 and 12.5 rpms rise but not by much and to hear a significant drop in rpms you have to flood it bellow 11.

    • @ihateemael
      @ihateemael 7 หลายเดือนก่อน +4

      you've got it man. You need something to accurately measure the mixture. Back in the 70's we had CO meters which measured carbon monoxide % , most manufacturers published the designed %.
      If you check out old dyno vids you'll see thermocouples in each header to measure gas temp. Then came 3 then 4 gas infrared exhaust analysers (CO, hydrocarbons, O2, CO2).
      Now most seem to rely on only O2. It seems to get good results. cheers.

  • @ericmartin6657
    @ericmartin6657 7 หลายเดือนก่อน +3

    The audio was fine

  • @jessegalea5524
    @jessegalea5524 6 หลายเดือนก่อน +1

    mate you are the carby master you have enlighted me about the air mixtures and how to spot them just blip the throttle and listen best advice cheers

  • @joeguadian8674
    @joeguadian8674 2 หลายเดือนก่อน +1

    Wow am 62 years old and I did my carburetor on my ATC three wheeler thanks I followed your video how to clean and how to adjust it and I did it yes 👍 thank you so much 👍👍👍

  • @thomasblais7751
    @thomasblais7751 6 หลายเดือนก่อน +522

    Hi I'm a barber and I can tell you brush your beard too much! Leave it alone only brush it with boar brush after shower! Friendly tip😁

    • @richardturner4950
      @richardturner4950 6 หลายเดือนก่อน

      My God! Just shut up and get on with it!!

    • @Dangerously_Satisfying
      @Dangerously_Satisfying 5 หลายเดือนก่อน +131

      Just a man helping out another man 🫶🏽 haha

    • @TheMotorcycleMD
      @TheMotorcycleMD  5 หลายเดือนก่อน +292

      Honestly, I appreciate this tip lol

    • @monasetser8830
      @monasetser8830 5 หลายเดือนก่อน +8

      😅

    • @shanepereraedu
      @shanepereraedu 5 หลายเดือนก่อน

      @@ttvgifted3171it worked. He noticed 😁

  • @levibarnard1546
    @levibarnard1546 หลายเดือนก่อน +1

    i love how u explain correctly….people should listen well

  • @carreteras101
    @carreteras101 14 วันที่ผ่านมา

    thanks for the excellent video. showing us the lean and rich conditions help.

  • @johnboudreau6810
    @johnboudreau6810 7 หลายเดือนก่อน

    This is a great video !! I am going to send this to a friend who is rebuilding a carb on a 1965 Honda 300 Dream .

  • @susancarstens2431
    @susancarstens2431 3 หลายเดือนก่อน

    okay I just had a little 22 scooter and I have watched so many videos I changed out my carburetor went with a bigger car never done any of this before in my life and I just watched TH-cam figured out how to do it but I watched so many videos and none of them exactly tell you how to do the the air fuel mixture your video I followed exactly and it's cranked up every time it idles perfect and it runs great thank you so much for your videos that you do.

  • @elkabong8460
    @elkabong8460 3 หลายเดือนก่อน

    Talk all you want.
    I appreciate your sharing. It works for me.

  • @bjrn-oskarrnning2740
    @bjrn-oskarrnning2740 4 วันที่ผ่านมา

    Hey, man, thanks! I just bought a project ATV and have been working on it for a couple of weekends. This was a great guide and the demonstrations really helped me know what to look for!

  • @stomp1Krr
    @stomp1Krr 4 หลายเดือนก่อน +1

    So good - thanks Cody! Just re-set the mixture of the Dellortos on my '75 Moto Guzzi. They were very lean as I had set them prior (per "conventional wisdom"), and I had all the symptoms you described. Now it warms quicker, idles lower, drops from a blip faster, and no flubby delivery from 2K to 4K rpm. Easy and fast to do too. Awesome!

  • @baron1c
    @baron1c 17 วันที่ผ่านมา +1

    Oh my goodness. Thank you. I have been have an issue with my 79 kz750 twin. Turns out I have the air mixture screw. Cant wait to get this dialed in!

  • @PedroNZ1965
    @PedroNZ1965 5 หลายเดือนก่อน

    Thanks for taking the time to do this video. It's awesome.

  • @Ifitallfails
    @Ifitallfails 2 หลายเดือนก่อน +1

    Bro you've just helped me with my new bike and the new carburetor I put on it. I had absolutely no knowledge of how to tune it and your videos saved me. THANK YOU I am so happy to hear my first bike run like a champ and I'm learning so much about bikes I'm glad I bought this cheap beginner bike to learn with.

  • @saulopena9840
    @saulopena9840 4 หลายเดือนก่อน +1

    Good stuff bro I bet you're a kick ass mechanic. This was very helpful. I just installed a card on my bike and have to initially said the carb. There are not a lot of professionals like yourself making videos, most are by average dudes so it's refreshing to have a professional giving advice. Keep up the good work and once again thank you.

  • @ckratzet5286
    @ckratzet5286 6 หลายเดือนก่อน

    Best explanation I heard ever!
    Clearly know wtf you are doing.
    cliff

  • @jeromewilliams2678
    @jeromewilliams2678 6 หลายเดือนก่อน

    Bro i change six plugs in 2 months and watch sooo many carb videos and your vid helped me mine is an fuel screw thow.....thanks👍🇯🇲

  • @drewnicest4319
    @drewnicest4319 6 หลายเดือนก่อน +1

    I used to use a color tuner worked awesome for sensitive carbs, especially multiple carb setups

  • @soulriderman
    @soulriderman 3 หลายเดือนก่อน

    Great info. I have my Armstrong MT500 to set up tomorrow. It's taking a while to settle back to tick-over, so now I know it's lean. I know what I'm doing now. Thank you.

  • @Killerfrogs909
    @Killerfrogs909 22 วันที่ผ่านมา

    best info ive gotten off youtube bro. thanks for taking the time to teach us how to try yo listen to the idle and the air flow off it. ive had this problem for weeks till today, now it runs like a champ! lets get it! time to goo smash on a lil colemen mimn bike with a few upgrades but besides that best info i could ask for! thanks cody

  • @zacharyalexander2814
    @zacharyalexander2814 2 หลายเดือนก่อน

    You might have just saved me from losing my bike man. I was about to give up on it fr. I haven't tried these screws but I'm just as new to riding as I am to carbs. I'm learning, though and you've taught me a lot in just this video alone and given me some hope.

  • @michaelanderson3771
    @michaelanderson3771 7 หลายเดือนก่อน +2

    As usual Cody - ypur Video are super helpful and make is so much easier to understand the dark art of carbies.
    Sharing your chanel with all my mates and others in my local Facebook groups. Keep up the great work and I am sure you will hit 100 K on no time.

  • @cody2493
    @cody2493 7 หลายเดือนก่อน +1

    You dont talk too much. Your speech is always on topic, and to the point. Id rather have someone "talk too much" but explain it clearly, than someone "talk a little bit first" about crap that has nothing to do with the topic.

  • @jamiehamblin7204
    @jamiehamblin7204 21 วันที่ผ่านมา

    Thank you, your a really good teacher ! I just got a 1982 kawasaki 440 and I love it !

  • @stefaandeconinck1531
    @stefaandeconinck1531 6 หลายเดือนก่อน

    Thank you so mutch. I’m 50y/o and I have a CJ 750 boxer engine. I gonna try this for sure.

  • @Straightbangin1979
    @Straightbangin1979 6 หลายเดือนก่อน +2

    Thank you so much for the video. I'm a woman who works on her own motorcycle and I'm never awesome at tuning the carb so this helped a lot. I just put a whole new exhaust system on so I need my I might have to alter some things with the carb

  • @yvanpadukov-willmann6962
    @yvanpadukov-willmann6962 18 ชั่วโมงที่ผ่านมา

    Thank you for this great knowledge! I’ve got a dual carb which I was terrified to mess around with but your videos give me confidence to work on my bike!

  • @donaivanbacorro3916
    @donaivanbacorro3916 5 หลายเดือนก่อน +1

    Really helpful. I really dont have any idea how my uncle fine tunes my motorcycles. Now i know what i am looking for. ❤

  • @henrysmith8012
    @henrysmith8012 6 หลายเดือนก่อน +1

    Been doing this my whole life. Very good explanation.

  • @eugenegriess1896
    @eugenegriess1896 5 หลายเดือนก่อน +2

    Dude screw those guys who say that you talk too much. The more you explain it the better my understanding of it. A big thank you for helping people who don;t know how to get a carb set up and tuned correctly. There are always going to be that faction of people who feed off of negativity and haven;t leqarned the biggest lesson in life. Just ignor them. They are not worth listening to.

  • @stillfast1
    @stillfast1 หลายเดือนก่อน +2

    I have struggled with this aspect of carb tuning for a long time. No one has ever explained the theory as you did. Simple steps to remember, hanging idle and drop being lean and the drop below idle too rich. Awesome, beautiful explanation very nicely done. My 95 Ducati SS and 74 Honda 360 are very happy. Thanks sir.

  • @gilbertoalvarez29
    @gilbertoalvarez29 27 วันที่ผ่านมา

    Best carburetor video so far 🎉

  • @geoffhurley8103
    @geoffhurley8103 6 หลายเดือนก่อน

    This was great! I've been working on bikes for decades and didn't know this. Thanks!!

  • @champ18d
    @champ18d หลายเดือนก่อน

    Great video I was able to get my daughters quad carb running perfect.

  • @boblowrey8266
    @boblowrey8266 19 วันที่ผ่านมา

    HEY CODY THANKS FOR THE GREAT VIDEO! YOUR TECHNIQUES ARE BRILLIANT MAN!

  • @joelong832
    @joelong832 6 หลายเดือนก่อน

    Thank you for the information. It got me thinking of what i need to do on my 150cc trike. I appreciate the help

  • @ericbatty4441
    @ericbatty4441 5 หลายเดือนก่อน +2

    excelent tip, my dad taught me this as a 15 year old, great video