How To Tell If Your Dirt Bike Is Running RICH Or LEAN
Рет қаралды 80,954
Күн бұрынLearn how to easily tune the air/fuel screw in just a few minutes:
2 stroke - motocrosshideout.com/carb/
4 stroke - motocrosshideout.com/fuel/
Is your dirt bike running rough but you can't tell whether it's running rich or lean? Jetting is important, and it can cause engine damage sooner if it's too far off.
This video will explain the difference between rich and lean, as well as how to tell how your dirt bike is running. This works for 2 stroke and 4 stroke bikes.
If your dirt bike is overheating because you are using the clutch a lot at low speeds then watch this video: • How To NOT Stall A Dir...
Here's the full article on my website about "How To Tell If Your Dirt Bike Is Running Rich Or Lean":
motocrosshideout.com/running-...
Motocross Hideout is my personal brand to help new riders learn to properly and safely ride a dirt bike so that you don't crash and miss out on life because of an injury. My Virtual Dirt Biker School is an online riding course/camp that teaches anyone new to dirt bikes the basic techniques to stay in control and become a better rider faster. I've taught many first time riders over the years, both guys and girls, young and old.
How to make dirt biking safer using basic techniques [Get my FREE guide today] - motocrosshideout.com/free-les...
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Disclaimer: Dirt biking can be dangerous if you don't respect the bike or terrain. This video shows you tips to help keep you safer as well as improve your riding technique and skill so that you stay in control while riding. I, Kelley Fager from Motocross Hideout, am not held responsible for a crash resulting in an injury from trying these techniques. Please use proper dirt bike riding gear to help prevent an injury.
@MotocrossHideout 4 ай бұрын
Which symptom is MOST noticeable on your dirt bike? Learn how to easily tune the air/fuel screw in just a few minutes: 2 stroke - motocrosshideout.com/carb/ 4 stroke - motocrosshideout.com/fuel/
@stevenkelley7774 4 ай бұрын
2024 YZ85 big wheel starts great hot or cold Right before power band full throttle it coughs bad 1 or 2 times every time hot or cold then goes. Yamaha usually sends them rich. I dropped the needle up to 4 notches and still coughs hasn't changed the cough. 3rd notch drop looked good on the plug medium brownish. They come with a 10 heat range plug I'm wondering if it's too cold having a hard time igniting fuel? Some times in Power band it crackles a little bit with some power loss. Tried air screw from 1/2 turn out to 2 turns still coughs before powerband. Yamaha says 30:1 I run closer to 25:1, older bikes used to run 20:1 Could it be just too cold of a plug having a hard time igniting the mix fuel?
@stevenkelley7774 4 ай бұрын
Also it has fouled 2 plugs in less than 3 hours of riding bike would still run but no power and just sputters and crackles new plug goes back to running descent. The plug check and watching the smoke it doesn't seem rich, it seems close. Could they be fouling from being to cold heat range plug #10 having a hard time burning then overwhelmed with fuel and fouls? After it coughs before power band it usually screams feels good most of the time.
@MotocrossHideout 4 ай бұрын
Changing the plug to a different heat range would just be a band aid fix. If it's not smooth when you hold it WOT, then I would go down one on the main and see what happens. Make sure you have a new spark plug and it's fully warmed up before testing.
@stevenkelley7774 4 ай бұрын
@MotocrossHideout ok my needle is all the way down, when I drop the main size I should put the needle all the way up bottom notch?
@MotocrossHideout 4 ай бұрын
If the needle hasn't made much or any difference, I would put it back in the stock position (middle) and then drop the main down a size or two and see what happens. Have you downloaded my free air screw tuning guide? (Link in description)
@flaminrc4303 11 күн бұрын
well sounds like my bike is too lean and too rich
@929ivaan 2 күн бұрын
😭😭😭
@jurresein2475 15 сағат бұрын
Exactly the Same
@austin41259 13 сағат бұрын
Same 😅
@jeffpaxton9172 4 ай бұрын
The sound effex was the best part of the video. 🙂
@MotocrossHideout 4 ай бұрын
Haha, thanks. I hope it wasn't the only good part 😅
@leesops710 3 ай бұрын
It was the effect but you was spot on. Thanks 4 the video very useful.
@jamesc.e.s.4551 11 күн бұрын
They actually were. I thought I was running rich, but because of his "ridiculous" sound effects, I now know I'm running lean. Sometimes acting ridiculous is the best approach.
@sambeenen1007 3 ай бұрын
No joke the sound effects helped ❤️
@c4r5on88 3 ай бұрын
Speaking a language only motorcycle owners know and it makes sense
@moboost-nm6ss Ай бұрын
Don't ride motocross, but I was seeking information for a motorcycle. Subscribed just for the sound effects because it actually helped a lot 🤣
@MotocrossHideout Ай бұрын
Ha, thanks for watching! If you know anyong getting into dirt biking/trail riding, please share!
@Poksutin 2 күн бұрын
so well explained and the sound effects really helps :)
@stlskybob 4 ай бұрын
Thanks for the great video, spot on sound effects!
@MotocrossHideout 4 ай бұрын
Haha, I try! 😂 You're welcome, and thanks for watching, Bob!
@stevodruhy4884 3 ай бұрын
This video helped me sooo so much thank you. Sound effects really helped 😄
@MotocrossHideout 3 ай бұрын
Glad it helped - thanks for watching, Ivan!
@jamesc.e.s.4551 11 күн бұрын
Lol, dude, the sound effects were both r*tarded and completely spot-on. Thanks, I now know I'm running lean, and not rich.
@tacomafan7488 9 күн бұрын
Great video! Sounds effect very helpful!
@highontowers 3 күн бұрын
awesome vid. Very instructibe.
@notyours417 2 ай бұрын
This definitely helped me today. Glad you made the sounds and played short clips of the engine sounds. I got the moto fixed and now we all go BRRAAAPPP!
@MotocrossHideout 2 ай бұрын
Great to hear - thanks for watching!
@notyours417 2 ай бұрын
I am tuning a 1984 Honda ascot vt500ft. The video was easy to understand. Thanks for keeping it simple.
@jeffvndeperre1262 Ай бұрын
carburators are still a learning experience for me and this video helped me allot !
@MotocrossHideout Ай бұрын
Glad it helped - thanks for watching!
@recklessfreedom Ай бұрын
Great video!!
@embemor5872 10 күн бұрын
Great video. Thanks.
@dalehess6265 4 ай бұрын
Thanks for the awesome information.
@MotocrossHideout 4 ай бұрын
You're welcome, thanks for watching, Dale!
@mikedahoe2251 22 күн бұрын
Needed this, thanx dude!
@MotocrossHideout 20 күн бұрын
Happy to help!
@tehvaris132 3 күн бұрын
the audio sounds were perfect explanation
@pramodverma9700 3 ай бұрын
Excillent explanation
@MotocrossHideout 3 ай бұрын
Glad you think so!
@scott1brayden2 27 күн бұрын
I've followed your guide, and much appreciated, it's quite addictive aiming for the sweet spot and have helped 2 friends get their pilot set up and running better. For my own bike I have the carb dialled in as good as I can, mainly on feel, taking the bike out for a good run. But I've gone up on main jet and it pulls so much better mid but now it seems not to rev out as much at top. Maybe over thinking this, but can running too rich improve mid range at expense of top end, evrything I'm.rrading is saying rich improves top end.
@MotocrossHideout 26 күн бұрын
Thanks for sharing Scott - I'm glad you found my guide helpful! That's a good question. From my experience, you shouldn't have to sacrifice top-end for midrange torque based on jetting. I like to lean out the main jet for top-end/peak HP until it starts losing power or bogs and then go back up (richer) 1 or 2 sizes.
@bobkelly2447 Ай бұрын
I'm impressed ! I watched your video more or less just to see what you get WRONG.... but you didn't and for a young guy to have that good of an understanding of the internal combustion machines is amazing ! I've used those aforementioned symptoms to trouble shoot carb issues for over 5 decades .... what will throw you for a loop is having a faulty ignition system that looks like a carb issue ! and that happens all the time. especially with older bikes ! ......so if you've been through the carb several times but the bike is struggling to get power at top end.... suspect that the ignition system is faulty in one way or another. older points systems had the condensers go out all the time but still run...just not run great! newer electronic ignition systems are virtually bullet proof, but they do fail occasionally usually they just stop sparking the plug completely.... but not always and they can be a real Bitch to figure out ! ....you explained hainging idle very well but can be just an idle that is high that takes a while to come down.... My 250 Ninja suffers from this as we speak.... just haven't got around to tweaking the air screws .... I also bought a thumb screw for the air mixture screw for the XR650L that I take to high altitudes every once in a while.... because when set to 4k ASL at 8K ASL it will not re start.... twist the air screw about 1/4 turn and it fires right up ! LOL
@MotocrossHideout Ай бұрын
Ha, I appreciate your encouragement, Bob. Thanks for watching and sharing!
@toddj.8245 3 ай бұрын
Loving the sound effects ur spot on !!!!!!!!
@MotocrossHideout 3 ай бұрын
lol, thanks!
@basimfara 10 күн бұрын
I like your examples 😂. If you have a video for selecting main & slow jets to solve rich or leen I would watch. Thanks for sharing
@MotocrossHideout 6 күн бұрын
Thanks! Here's a video on knowing if your pilot jet is rich or lean: kzfaq.info/get/bejne/muB2rbp6v9nZdJs.html
@MartyGramRC Ай бұрын
Phenomenal - thank you
@MotocrossHideout Ай бұрын
You're welcome, thanks for watching, Marty!
@lmc7233 2 ай бұрын
think i have watched this video at least 20 times already so helpful! wish i could remember half of it 🤦♂ Can we get a 2smoke special after the trail vids
@MotocrossHideout 2 ай бұрын
Ha, thanks for watching! What would you like to see about 2 strokes?
@lmc7233 2 ай бұрын
@@MotocrossHideout Just how to tune one, as there a bit different than the 4t
@gabagool2064 Ай бұрын
This video was great but I’m still conflicted because my dirt bike has signs of both lean and rich symptoms. 😂
@MotocrossHideout Ай бұрын
Ha, well start with the fuel/air screw and do one thing at a time! Let us know how it goes :)
@betillgettop3tv352 21 күн бұрын
What’s your recommendation when you have symptoms for both rich and lean? My bike is getting super hot in a very short amount of time (before actually riding). It starts really easy when cold with or without choke and revs really high until bike warms up and then the revs die down and even out. I’ve just rebuilt the top end after the motor got that hot the piston seized the inside of the barrel. After about 10 minutes of riding.
@HalDanakaAlex 13 күн бұрын
Thanks, it seems like my bike is too rich in mid range and ok on near cut off
@ultronpym1008 3 ай бұрын
I have a klx140 with bore up kit 66mm, cam lift, exhaust. it runs great at 3/4 to full throttle but in technical slow section specially rocky section its like its coughing/sputtering i'm using 28mm carb with 38/120 jet 1st clip on neddle. is the pilot jet too rich? it gets worsen if I pull the choke from 0-1/4 throttle.,by the way usually running at 200-800 ft.
@MotocrossHideout 3 ай бұрын
That sounds rich to me. Not sure which 28mm carb you're using, but have you tried leaning out the air/fuel screw? Grab my free guide to learn how to do it in just a few minutes to know if your pilot jet is too big.
@quantumtechcrypto7080 Ай бұрын
There is a map that shows the overlap of different systems in the carb. Find that and specifically dial in the area that’s affected. I found out when you understand the concept of the systems they each have to work well for that smooth linear operation ir you get what you have. Sounds rich too. Could be needle size and placement as well as air fuel. Is screw before body of carb is adjusts fuel is after main body (float bowl) and it’s closer to cylinder head it adjusts air. Look for that breaks it all down. I think it the RD jet kids or??
@Wesley.. Ай бұрын
Great vidoe man but i still can't figure out whats wrong with mine. I have a Crf250X, it starts like it should. When i give it some throttle the rpm stays high and wont settle to normal. When i pull the choke out and back in it goes down to normal. But again when i throttle it stays high. When im in gear i can let the rmp go down by pulling up with only the clutch. If the bike stalls of I want to start it when it's warm, it won't start and eventually drags the battery empty. I played with the air mixture screw and stationary idle screw but I can't figure it out 😬Maybe I did something wrong. Could there also be something wrong with the throttle body you think, like scratches or false air?
@MotocrossHideout 28 күн бұрын
That sounds like a hanging idle, which is a lean condition, usually caused by the fuel screw/pilot jet being too lean or an air leak. Make sure the carb clamps are tight, there's no cracks in the intake/air boot, and that the fuel screw has the proper o-ring/washer on it so no air is leaking by. If it's always done this, then I'm guessing you just need to richen it up. If it's a new problem, the pilot jet might be dirty and need to be cleaned or replaced - assuming there are no air leaks. Let us know what you find, Wesley!
@user-oh6nj7ec8l Ай бұрын
My yz85 fouls plugs every ride I have an fmf shorty on it with I think rich jetting from the guy I got it from and I ordered stock and a size down for each Jett. Does that seem reasonable?
@MotocrossHideout Ай бұрын
Yeah, stock is a good starting point, but they often tune the race bikes a little on the rich side from the factory. Start with the air screw - grab my Free guide if you haven't already;)
@aspect6693 8 күн бұрын
I have a 2 stroke 73cc aluminium kit. and its smoking a lot on wot, but I cant understand why because it's lean. the spark is brown but more on the lean side. I was running 122 main jet, after that, I installed 115 and it was SUPER LEAN and it still made a cloud of blue smoke. Now I'm running a 118 main and its still smoking. I have tried everything, like taking of power jet, different oil, other gasoline, different air temperatures, spark plugs, different oil mixtures, changing needles, needle clips, different carb positions and a lot more.
@MotocrossHideout 20 сағат бұрын
Is it liquid or air-cooled? How is the throttle response and power when you hold it wide open? Does it rev out smoothly and clean with a 122 main?
@mysticalmisfit33 14 күн бұрын
1990 dr250s, won’t kickstart, will bumpstart. Idle hangs high, then rolls down, with a backfire out the carb, an occasional clicking noise at low rpm. It’s jumpy at low rpm’s. Little boggy. So I think it’s too lean. ? Just cleaned the carb, maybe need to adjust the float for the fuel mix and adjust the motor valves for compression?
@MotocrossHideout 14 күн бұрын
Definitely sounds lean. Have you tried adjusting the fuel screw yet? If jetting changes don't affect, then I would do a compression test and/or check the valve clearances.
@johnmathewson985 Ай бұрын
1980 PE 175 2 stroke. When starting it takes 6 -8 kicks with choke on. When it starts it will rev high for many seconds. It is like my kicks are filling up the the engine with fuel then it starts. When I stop the bike I will turn off the gas and run the fuel bowl empty. I am familiar with jetting and the float level has been set. Any thoughts?
@MotocrossHideout Ай бұрын
Revving high right away is typically a lean symptom. Either not enough fuel or there's an air leak around the carb/intake. Check for loose clamps or cracked manifold, then move to jetting. Let us know what you find.
@jamalmitchell6223 15 күн бұрын
I think my 08 crf150r is running to lean it keeps overheating what should i live in Cincinnati Ohio if that helps thanks
@MotocrossHideout 14 күн бұрын
kzfaq.info/get/bejne/ipOCYMeSyNKsaH0.html
@justinlloyd9342 4 ай бұрын
I’ve got a 4 stroke that I would say is running a little rich. But my biggest issue is flame outs or stalls. I’ve only ever rode 2 strokes and I’m wondering how to fix it
@justinlloyd9342 4 ай бұрын
Bike is a ssr300 the stock carb was junk so I put a lectron on it and it improved it 100% but I still have the flame outs thanks for the help
@MotocrossHideout 4 ай бұрын
Hey Justin, flame outs are often caused by lean pilot circuit jetting or a light flywheel weight. Can't remember if the lectron has a fuel screw, but I would richen that and see if it helps (always test when the engine is fully warmed up).
@justinlloyd9342 4 ай бұрын
@@MotocrossHideout I would adjust it but it has some of the signs of running rich like fuel smoke while idling and giving it gas but I’ll do some adjusting on it and see what happens thanks for the help
@kurtfredericks.sinlao8589 2 ай бұрын
Mine is bogging while sudden accelerating like you have said. But when i check the sparkplug the of it is black. Hope this will have answer. Thank you
@MotocrossHideout 2 ай бұрын
Yeah, that's why spark plug reading isn't always accurate. Does it bog when you turn the throttle wide open? That could be lean on the main jet, while the black plug is caused by rich on the pilot jet.
@kurtfredericks.sinlao8589 2 ай бұрын
@@MotocrossHideout it is bogging when i turn the at full throttle. The bike is not moving the engine is like its going turn off. But when i am on drive. Just like your example on number 6(bog while accelerating)
@MotocrossHideout 2 ай бұрын
Yeah that sounds to me like a lean main jet (too small). I'd go one or two sizes bigger and see what it does. Not sure what bike it is, but some bikes also don't respond as well when you "whack" the throttle open, especially if it has an older carb without an accelerator pump.
@kurtfredericks.sinlao8589 2 ай бұрын
@@MotocrossHideout ok i try changing my jets into bigger one. I am currently using 125cc motorcycle with a 28mm carb jettings are 100 and 38.thank you
@GregDavidson-si8kt Ай бұрын
What grade of gas should be run through a crf150rb? Is it ok to run premium gas through it? That's all I put in my lawn equipment and vehicles.
@MotocrossHideout Ай бұрын
Yes, if your 150R is stock, 91-93 premium is fine to use.
@danielluhan8794 Ай бұрын
use non erhanol if available😊
@MotocrossHideout Ай бұрын
Yep, ethanol is not good in any machine (especially a carburetor) if you want it to last more than a few weeks.
@GregDavidson-si8kt Ай бұрын
@MotocrossHideout gotcha! Thank you for all that you do! I have so much more confidence and a much better rider in just a week's time by watching and paying attention to all your lessons and advice. I don't want to find myself overly confident and always maintain a respect for the machine. I am so in love with my bike! I'm going to always be good to her, and she'll always be good to me.
@xxs1lentk1ller30 15 күн бұрын
Hey, i have a little problem with my 6mth bike, starts hard on choke and dies when warm dies when rapid gas, lowered gas amount still same problem
@MotocrossHideout 14 күн бұрын
Not sure what bike that is but have you tried adjusting the air/fuel screw or the idle screw?
@shaybelfield1006 2 ай бұрын
I have a yz 85 bored to 105cc used the same jets and was fine,then I installed vforce4 reeds and rebuilt the carb with the same size jets but new ones, now the bike doesn’t want to start from cold with or without the choke without giving some throttle, even when engine is warm it won’t start without throttle and when I give it some revs and let off,the engine wants to cut out, also turning the idle screw doesn’t seem to change the revs, and has a minor bog from 0-1/4 throttle but once hitting the bands it runs fine, any idea what this could be?
@MotocrossHideout 2 ай бұрын
Sounds like it might be rich on the pilot jet circuit. Have you tried leaning out the air screw? I recommend grabbing my free tuning guide :)
@shaybelfield1006 2 ай бұрын
@@MotocrossHideoutyes the air screw didn’t seem to make a difference so I’m going to try a smaller pilot jet and see if it’s better or worse thank you, I wasn’t sure if it’s too lean or rich
@shaybelfield1006 2 ай бұрын
@@MotocrossHideoutI’m using 45 pilot and 138 currently which are stock with yz 85
@ndyales2226 4 күн бұрын
hey guys, i need help, i was riding completely fine and when i stopped it stalled. I kickstarted it and it was stalling when i didnt put a lil bit of throttle. So i quickly went home and when i was dricing home i figured out that my gas is bad. When I held the throttle for a while and then let it go, it held on for a while. When I just moved the throttle, the throttle stayed for another 0.3 seconds, which didn't happen before.
@joeuno4399 4 ай бұрын
Hey mate any idea why my 250exc 2008 has no top end power tops out about 85kph and its running 50mm of oil to 1 litre of fuel cheers
@MotocrossHideout 3 ай бұрын
What does it sound like doing that? Have you tried to change anything yet?
@joeuno4399 3 ай бұрын
@@MotocrossHideout just the plug was crusty as thinking if just going back to oem jetting and mixture see what happens
@joeuno4399 3 ай бұрын
@@MotocrossHideout runs sweet through all the gears good intill 5th then it's bogs like crazy stock sprockets to
@MotocrossHideout 3 ай бұрын
Crusty as in the spark plug is black? I would try going down on the main jet and see what happens. Don't change the oil mixture - just do one thing at a time so that you know what made the difference.
@joeuno4399 3 ай бұрын
@@MotocrossHideout yeah just going to take it to the local mechanic get him to have a look at it got no time
@lucaz-if2hq 29 күн бұрын
my 4 stroke especially in first gear likes to jump like cut in n out when i get on the gas and when i hold it like half throttle it just sounds horrible
@MotocrossHideout 28 күн бұрын
Sounds like it needs some tuning - what have you tried so far?
@gumbilitous2804 Ай бұрын
My quad (250 4 stroke) struggles at low rpm and high load, and it really picks up power above like 4k rpm
@MotocrossHideout Ай бұрын
Does it sound/feel lean or rich based on this video?
@philhitch1924 Ай бұрын
If it's a 4stroke and blows white smoke it's a problem with oil in the combustion . Not good. Engine worn out. Brown or black smoke is unburned fuel. A mixture problem .
@KokohG4UL Ай бұрын
Mate I need some help, my bike starts just fine with one kick in lower elevation, but in higher elevation it can't do that anymore, It's hard to start, when I check the plugs, the color of it is grayish (I checked it in lower elevation), what seems to be the problem here mate? It seems that the RPM runs too low in higher elevation that's why It doesn't start easily, but if I bring it up, the idle in lower elevation would be too high
@MotocrossHideout Ай бұрын
Good question - that's a very common problem with carbureted bikes when changing elevation. When you go higher, the air is less dense and it will make your bike run richer, so you'll need to lean the jetting out at a higher elevation, and then richen it back at lower elevation. Start with the air/fuel screw. Does that make sense?
@justspooky6184 Ай бұрын
Hey my bike backfires and shoots a flame about every 7 seconds when i accelerate, its fine and feels good untill about 60% throttle then it starts to happen. It also bogs at super low rpm if i just rip the throttle. Any tips/ideas ?
@MotocrossHideout Ай бұрын
What have you tried so far? I recommend grabbing my free fuel screw tuning guide and starting there if you haven't yet ;)
@lmc7233 3 ай бұрын
Hey, got a strange problem i can tune the jets up or down even to where its perfect and the plugs golden, yet when going over 80ks so 4th gear and up it will cut out after a few seconds of throttle its a old bike ts250 but any help would be appreciated, thanks!
@MotocrossHideout 3 ай бұрын
Does that bike have a tachometer to see the RPM? Are you hitting redline? If not, it might be running too rich on the main jet.
@lmc7233 3 ай бұрын
@@MotocrossHideout Thanks mate and no tacho on mine atm but its probably rich yet when i downsize the main it cuts outs as well, but i know its not redlining cause it used to work fine, so a bit stumped
@MotocrossHideout 3 ай бұрын
Other things can also make it run rich, such as a dirty air filter/rag in airbox, or a worn engine.
@lmc7233 3 ай бұрын
@@MotocrossHideoutYeah even changed the filter, might just be on her way out then
@lmc7233 3 ай бұрын
Thanks for the help but much appreciated! @@MotocrossHideout
@huntnfishin2074 3 ай бұрын
What’s a symptom of 250f feeling slow in top gear? Was riding with my buddy who has a 450 and felt like I was topping out at like 50mph. Possibly the sprockets? It is a used bike. Seems to have plenty of power was just suprised thought the top speed would be more
@huntnfishin2074 3 ай бұрын
It has a power commander. After watching more of your video that is a better explanation it seems like it also gets rev limiter fast! In 5th gear
@MotocrossHideout 3 ай бұрын
What bike? What gearing/sprockets does it have?
@huntnfishin2074 3 ай бұрын
@@MotocrossHideout I’ll have to count the teeth, some are broken off need new ones. It’s an rmz250
@MotocrossHideout 3 ай бұрын
@huntnfishin2074 teeth broken?? Get new sprockets and a chain and then see what happens.
@rdowg 4 күн бұрын
Quick question: So if my bike needs the idle adjustment screwed in ALL the way, that means the carbs need adjustment?
@MotocrossHideout 3 күн бұрын
That's definitely one symptom. That usually means it's running rich, which could just be the jetting, but it could be a very dirty air filter or perhaps a worn out engine that's running low on compression.
@rdowg 3 күн бұрын
@@MotocrossHideout would it feeling like it's "chugging" on idle in 1st gear tie in with it being "too rich"? Im praying it's not a worn engine, I made sure the carb and air filtration system was perfect before I put the carb back in. It's a 96' vulcan750, and I got it with the carb detatched because my dude rebuilt it but couldnt figure out how to put it back in
@MotocrossHideout 3 күн бұрын
@@rdowg It's hard to know for sure without seeing/hearing it. To me, "chugging" would be riding at too low of an RPM and the engine is about to stall.
@rdowg 3 күн бұрын
@@MotocrossHideout Crap, oh well 🤷♂️ Now that I think of it, I should probably re-tune that carb before I start asking about idle on 1st feeling like it's got too low rpm Thanks for the replies!
@gagelemoine118 2 ай бұрын
my bike is muttering when i get in 5th and run it wide open what do i do to fix it?
@MotocrossHideout 2 ай бұрын
Hey Gage, what exactly do you mean "muttering". What does it sound/feel like?
@mysticalmisfit33 14 күн бұрын
I signed up trying to get the tuning tips and didn’t receive it. Got an email about trail riding.
@MotocrossHideout 14 күн бұрын
You should have received it within a few minutes of signing up. Check your spam folder in case it went there. If it's not there, just reply to one of my emails and I'll personally send you the guide. -Kelley
@Kpostma100 27 күн бұрын
My 4 stroke 250cc quad does frive alright has alot of power but when decelerating i hear alot of pops from the exhaust,i thought that might be becouse of a to rich mixture but i have no problems or signs whatsoever
@MotocrossHideout 27 күн бұрын
A little bit of popping/crackling is fine, but excessive/loud popping generally means the fuel screw/pilot jet is too lean.
@steveabner 21 күн бұрын
I have a DR350SE with a tm33 pumper carb. At idle, it has a bog when quickly snapping the throttle, and I can't figure it out. I've tried changing jets and would always end up too rich, and I've checked the pumper needle multiple times.I even went as far as installing a wideband O2 sensor in the exhaust. The tm33 pumper carbs don't have adjustments on the pumper, it's just a rod. The bike runs great other than that, I've been trail riding with it for a year. If anyone has any ideas, I'd be willing to try them. 😊
@MotocrossHideout 20 күн бұрын
What throttle position when you quickly open it? If it's wide open, then I would try adjusting the main jet size to see if it helps.
@steveabner 11 күн бұрын
@@MotocrossHideout It's when the throttle is closed and I quickly open to wide open it will bog. Which is lean, I think. I've gone up a main jet and it spits and sputters at 3/4 - full throttle and the wideband gauge is pegged in the 10s full rich. So I changed it back. I've heard it's hard to dial these pumper carbs in on a dr350.
@johnwojcik977 23 күн бұрын
On a 2 stroke rich will be torquey and splooge out of the tail pipe, lean it'll run like a scalded dog right up until it melts.
@TheWhole36 2 ай бұрын
My bike won’t start with the choke on but will start fine without can you help
@TheWhole36 2 ай бұрын
What jet do I need to change and would I have to go up or down
@MotocrossHideout 2 ай бұрын
When the engine is cold (air temp)? Sounds like it's runing rich. Have you tried adjusting the air/fuel screw?
@bofflombard8755 Ай бұрын
Can some one please help me if i gou past 3/4 of throttle my bike starts surging the whole time it is a 4stroke carberator engine what can be the problem
@MotocrossHideout Ай бұрын
Sounds like it's too lean on the main jet (not getting enough fuel), or possibly a weak fuel pump if it has one.
@bofflombard8755 Ай бұрын
@@MotocrossHideoutcan a incorrect float level also cause the engine to surge
@MotocrossHideout Ай бұрын
@@bofflombard8755 Yep, float level will affect all jetting, thanks for sharing, Boff.
@bofflombard8755 Ай бұрын
@@MotocrossHideout I found the problem I lost spark on the coil and spark plug wire and I adjusted the float level it is now revving out after I bought new parts
@MotocrossHideout Ай бұрын
@@bofflombard8755 Glad you got it figured out - thanks for letting us know!
@michaelmwangi7477 5 күн бұрын
my bike goes brrrrrrrrrrrngg brrrrrrrrrrrrng
@hooligan6855 6 күн бұрын
It's crazy how I'm having rich and lean issues lol
@Robochris 2 ай бұрын
So I kind of have symptoms of both. Easy start. Bogs and dies with throttle. Hanging idle. Poor throttle response. What should I be looking at next? It’s a 90cc 2 stroke atv. Kids were riding fine one day and just started acting up, hasn’t been the same since. Carb rebuilt, new jets and all. Also has new oil pump.
@MotocrossHideout 2 ай бұрын
Sounds like it might be lean. Have you tried adjusting the air screw? Also, make sure the carb clamps are on and tight so there's no air leaks.
@Robochris 2 ай бұрын
@@MotocrossHideout so far I haven’t found any air leaks. Seems to idle best with air screw around 1 turn out but still bogs out with throttle. Any idea what could cause it mid-ride?
@MotocrossHideout 2 ай бұрын
What throttle position is it at when it bogs? 1/8, 1/4, 1/2, or full?
@Robochris 2 ай бұрын
@@MotocrossHideout so, its mostly 0-1/4, almost immediately. when I can get it to rev, I can tell its cant go full throttle. top end rebuild kits are fairly inexpensive on these, could that solve it?
@MotocrossHideout 2 ай бұрын
Okay, I'd try going one size larger on the pilot jet and then re-adjust the air screw for best throttle response and see what happens.
@lucasgutierrezm3998 3 ай бұрын
Mine shuts down when I’m Not on the throtle :/ sometimes stays on but does if it’s hot specially after riding it s little
@MotocrossHideout 3 ай бұрын
Hey Lucas, sounds like it's running too rich or possibly the idle is set too low. Have you tried adjusting the air/fuel screw?
@lucasgutierrezm3998 3 ай бұрын
@@MotocrossHideout i haven’t but i will def look into that! Thank you so much for your answer
@paulofaria976 Ай бұрын
My Ktm 300 exc starts on the first try every time but runs like ass, why?
@MotocrossHideout Ай бұрын
What does it do when riding?
@bikingwithjack4276 18 күн бұрын
I have every single symptom 😂
@Postalguy1 19 күн бұрын
My bike seems to go… then I slam on the deck of the moped … then it seems to go properly…. What would this be 😅
@BigEpinstriping 19 күн бұрын
Just a shot in the dark here, but your float/float needle may be messed up or sticking, this is why when you stomp on the floorboard it works normally, the sudden jolt un-sticks the float needle. If it's sticking, fuel won't flow into the float bowl. you can also tap on the side of the float bowl with a screwdriver to un-stick it., If the float has a leak, it fills with fuel and doesn't float, you can flood the bowl, and fuel will pour out the carb overflow tube. Clean the needle and seat, or get a new float needle if it's sticking, replace the float if it has a leak and the float istelf gets fuel inside.
@vincentdyas4063 3 ай бұрын
What if it’s doing both
@MotocrossHideout 3 ай бұрын
Hey Vincent, could you explain to us exactly what you're hearing/feeling and what you're doing on the bike when it happens?
@donnieji4825 Ай бұрын
What happens when i cant stop make these sounds with my mouth when I'm not on my bike?
@MotocrossHideout Ай бұрын
Is that a problem? ;)
@marcusthomas2690 3 ай бұрын
Our racing mini 2 strokes get awful mpgs no matter what 😂😂
@MotocrossHideout 3 ай бұрын
Ha, yeah I guess if you're holdin' em wide open all the time!
@krkk9418 3 ай бұрын
My Bike ran completely fine before now it has signs of running rich
@MotocrossHideout 3 ай бұрын
Has anything been done to or changed on the bike since it ran fine?
@krkk9418 3 ай бұрын
@@MotocrossHideout only a throttle cable change but it ran fine since then but today i wanted to go for a ride and it went really slowly sounded like it hit the rev limiter super early even tho the Bike doesn't have a rev limiter
@MotocrossHideout 3 ай бұрын
Sounds like the choke is stuck "on".
@user-dv8yn6hu8q 3 ай бұрын
Nothing is as good a sing as you first think😂 I've come to understand carbs enough the past 6 month he should have done in with another video he has up here on the right😂 ko everything is the same symptoms at time
@MotocrossHideout 3 ай бұрын
Huh?
@user-dv8yn6hu8q 3 ай бұрын
@@MotocrossHideout just laughing at the amount of times you say something firstly by saying this is a good sign! So start think cool then it's this is a good sing your running lean!🫣 just thinking not that good after all damn a thought a was in the good sign group lol😂
@mikesanders902 3 ай бұрын
Rum, rum, rum, rum
@6Twisted 20 күн бұрын
Rich engines run cooler because producing carbon monoxide produces significantly less heat than carbon dioxide.
@jamesoso259 3 ай бұрын
For 2 strokes this was just a terrible video
@MotocrossHideout 3 ай бұрын
Why do you say that, James? Are you having problems with your YZ250?
@jamesoso259 3 ай бұрын
@@MotocrossHideout not at all my bike runs amazing
@tomfisher47 2 ай бұрын
My yz 250 runs amazing, too
@connorwilson8078 29 күн бұрын
Don’t agree with choke part a well tuned bike does not need choke , this is a massive misconception
@MotocrossHideout 28 күн бұрын
Engines don't efficiently burn the air/fuel ratio when cold, thus requiring more fuel/less air to start and run easily. So if you don't need to use the choke with a cold engine, wouldn't that mean it will be too rich once it fully warms up, Connor?
@dwightregner778 22 күн бұрын
I never have to use my choke unless my reeds are starting to go bad
@connorwilson8078 22 күн бұрын
@@MotocrossHideout plug tells me it’s running good, so defo can’t be that, my 250 runs a little rich but
@nfol6420 21 күн бұрын
If it's 20,,°C en I don't need choke it's not to Rich for me , certainly not air cooled
@nfol6420 21 күн бұрын
On my ratiometer it's 12,3 sow still good
@justinevera9094 13 күн бұрын
This guy is the best! 🫶
@petergehle4222 3 ай бұрын
14.7 is good for cruise and idle but 12.7 to 13 under power. Choke doesn't add fuel it restricts the air. Otherwise good
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