Tune Your Chinese ATV Carb
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- Опубликовано: 28 авг 2024
- All of these things are slightly different.. Some have an adjustable air/fuel mixture, some do not.. Some have springs keeping tension externally on the idle screw, some don't... This video should get you in the ball park.
If you want to go the new carb route, I've been very happy with the couple PZ20 carbs I've purchased. You can grab one at this affiliate link and I may receive a small stipend from Amazon if you purchase from this link or simply go to Amazon and search PZ20. www.amazon.com...
Quick Carb Teardown:
ruclips.net/video/YpMmEUD84PY/видео.html
Good video. Here's some info to supplement. There are 2 jets in these, an idle jet and a main jet/needle jet. If your mixture screw does nothing, then your idle jet is plugged and it's running on the main jet. When this happens your idle speed screw will also be extremely sensitive.
If it idles fine and the mixture screw works, but if you go near full throttle it loses power or even dies, then your idle jet is working but your main jet is plugged.
Both issues require taking the carburetor off and cleaning it.
This is exactly what is happening to my kids 50cc quadebike. Could you possibly post a link for a video to do this as I'm completely new to this and don't have the first clue. Tanks in advance
I think I’ve got a spare carb laying around here somewhere, I’ll see if I can make a video.
@@BellyUpFishGarage hey you ever make that video lol. I just got a grom clone and I bought a nibbi for it. It Boggs if I give it to much throttle to fast but if I kinda east into it, it’s fine? Should I adjust the needle?
@@johnnyburgett7215 no video yet i guess
No, I’ll see if I can make one this week.
Nobody else on RUclips can explain how to tune a carb as well as you did. I'm glad I found your channel. I'm going to be a combustion engine wizard, now! LOL Thanks, man!
There is NOTHING to "tune" other than changing jets and turnning the air bleed 1.5 turns from lightly seated
Pretty sure we can file “turning the air bleed screw” under “tuning.” 😆
They certainly can. This wasnt a thorough explanation by any means.
I concur ❤
Sometimes the air/fuel screw comes with a little plug covering it. If you use an 1/8” drill bit and very carefully and slowly drill into the Center of this plug, it will eventually catch and pop it out revealing the adjustment screw 👍
Omg I think you just saved me from going out getting another carb, I got a new Chinese pit bike 125 and it didn't have no idle screw or air but there is these rubber stoppers hmm 🤔
Well i probly messed up idk if i drilled too far and i 100% used the wrong drill bit and think i destroyed the screw face
I actually am checking the jets on my new carb for this thanks for the tip
Sometimes you need to drill a hole and screw a sheet metal screw into it . Then grab the screw with some pliers and yank the plug out.
WOW. I have this same RTV and have been banging my head trying to get this thing running. Thank you so much for doing this. My daughter will be so happy I got this thing running again!!
Andrew Vela Glad you could get your kiddos ATV going!
@@BellyUpFishGarage p
This is the best damn carb tutorial I've seen yet.. i finally get it now
Dylan Diel Glad it helped!
Dude I ain't no lie,you made that so so simple explaining the idle and air fuel mixture,no rambunctious beating around the bush astronomic do it yourselfer video I ever seen,dude THANKS,straight PLAIN to the point no CHASER,just the task I needed to see,😊THANKS guy!!!!
Man, I'm glad you found it helpful!
Thanks a bunch, i had just cleaned a newly acquired to me 70cc orion. It worked fine until warm where it woulf stumble and stall, i remembered this video and now it appears to be running lovely and not stalling out
Thanks Mr. Fish 😁
I was going 1 1/2 turns.
They're definitely cheap but when running right they're fun and the kids love them.
THANK YOU, MY SON WILL BE SO HAPPY ! I've been tinkering with his machine for a day or so. This really helped !
my son called me a 'come bus onion' engine wizard, close enough I guess, thank you for such an easy to follow video and making me look cool in front of my son and his friends!
Me this weekend 😂
You’ve got this! 😆
Thanks to you I figured out my issue. The gas/air mixture set screw is snapped off. It came from the factory like this and I'm happy to have an answer. Thanks again.
Glad it was of some use.
So how did you get it adjusted
@@omexgazplayz6298 I just went and bought a new carburetor. They are less than 20 bucks on Amazon.
@@georgesmith6154 are the carbs interchangeable?
I just bought, apparently a predator 250cc, but vin number shows no such things, other then conquinghensim Corp. Lol
I cleaned the jets, replaced the fuel and replaced the relay fuse, it idles fine but when driving, misfires and backfires
Yeh, for the most part, many of these Chinese quads all use the same style/size carb.
OUT OF ALL OF THESE VIDEOS THIS ONE WAS THE ONE!! Thank you brotha. My 2020 125cc Coolster Dirtbike is able to idle now 💯
I’m glad it helped!
Another way I do it is raise the rear wheels off of the ground and full throttle at the same time adjust air fuel mixture screw. Found that to work for me.
Pop the chain off.
Very simple not 20min long video about nothing. Thanks homie
That little 'sense it' joke made you have another subscriber. Exactly my kind humor
Odi Well thank you. Maybe I’ll post something else you can find useful. ;)
Very well explained! Hands off, and yes, those chinese carbs are a bit slower in throttle response than a keihin or mikuni. but still they do the job. witch at the end of the day, brings you smyles :) :)
If you plan on improving existing exhaust, you may wanna get increase flow the way you like it , then this carb can do so much more!
Save someone sometime maybe a headache!👍❤
Thank you I saved two $200 That’s what the guy or mechanic try to charge me thank you so much bro
Antonio Hernandez That’s great! You’re welcome.
That's a scam mechanic damn
Thats a shitty ass mechaniv
The best video and the best explanation of how to tune a carb thank you for sharing it 🙏
Thanks man! Easy to understand and straight to the point, worked perfect!
I’m glad it helped.
Thanks for posting this the kick on my blaster broke and I had nothing to ride now I can use the china boat again
Thank you I have been having a rich problem and I'd dint know how to tune it but now I do thank you
I’m glad you found it useful.
Our Tao Tao 110cc LIVES!! We couldn't figure out why it had slowly degraded in performance.
We followed your video and not it flies again!
My 10 yr old Thanks you very much!
Stewart McGill Excellent! Glad it helped! Hope you had a great Father’s Day.
My man! Got rid of the sucking noise at low rpm. Purrs like a kitten and runs like a champ.
Thank you for this, you will sense it really made me chuckle !!!
Daughters just learning on their s so a bit of a bog and low idle are a problem for me. Your video is great and thanks for the help. Happy Father’s Day
Thanks for taking time to do this video. Had just what I was looking for.
Glad it helped!
These guys commenting are right. A fine tune with a fine explanation.
Thanks!
Glad it helps! RUclips has helped me so much, it’s nice to just be able to help others with what little I’ve got. ;)
Good video. Love the name and the "your kid will think you're a combustion engine wizard" to end it lol
me and my father bought a 200$ tao tao 125 and we got it running again.
ッJackie cool, is it still kicking?
@@deborahchesser7375 nope, eventually got so unrepairable just dumped it. we bought a bunch of new parts for it, to no avail. just bought a 1999 yamaha breeze 125 and its a beast.
Maybe that explains why you picked it up to 200, totally sucks
I've always brought them a quarter turn out after finding peak rpm. Richens it a bit for when you whomp on the throttle so she'll go. These seem picker than the big bikes I've worked on in the past though. I'd like to see what a stepped flywheel key would do for the ignition... give 'er a little advance for better throttle response. Not so much Mo Powa, but rideability.
MissingLink MTB They certainly seem more picky than bigger bikes.
I feel like if you raise the needle it may also help. I've just started playing with these chinese ATVs and the cheap carbs are pretty finicky I've found. I bought 2 new ones that run perfect and then bought a 200cc to play around with. It needs some work and somebody put a MOLKT carb on it. It's been a learning curve. At least they're cheap to beat around on.
Great video. I was able to get my sons quad, i purchased used, running in these few easy steps. Thanks a lot.
Excellent! Glad it helped!
Thank you! I now have wizard powers. Sincerely, thank you!
Great simple and helpful tutorial 👍
I'm glad you found it helpful!
I think I'm more impressed with your starter actually working lol
The starter is about the only thing I’ve haven’t replaced. 😆
Thanks so much! My little 90cc quad wasn't idling good so I tried this and it worked!
Happy to hear it was of some benefit for you! :)
Buddy you helped me fix my ATV buddy your awesome
Now I don't have to go to shop just for this problem... Thank you💪
Glad I could help!
Now people at the shop are wondering why business is so slow.
Thanks man finally got my bike to idle perfectly after this video
Best video I've seen so far Great job
Everytime I go to youtube something, my shit is always different 😂. I have only one adjustment screw on both my ATVs. 250 and 155z HO
I know the feeling. One of our 125’s was like that....
🙏🏼 awesome video. I can fix anything and build almost anything But tune a carb 😹 not me lol . This has been the most helpful video on these chines carbs and trust me a have watched way too many lol , you rock 😎👍🏻 . I’m building a drift trike out of a junk CATV . Finely got it running now I’m just cleaning up the wires .
Thorn Life Glad it helped!
Good rule of thumb, all the Chinese bikes are dangerously lean, richen it up immediately, do not even ride it before you fatten the carb up or you will burn exhaust valves and then the rest of the motor.
the full turns save a lot of time lol
Good one mate I will definitely try this I’ve got one that’s doing the exact thing
So, this video has been much more popular then I ever anticipated.
What other sorts of “Chinese ATV” stuff would you guys like to see?
All of it 😆 🤣, thanks for the video
I’ll see what I can do...
My daughters didn't come with a fuel shut off valve. I'm used to turning my off when it's not driven and I didn't think to check for that 😅. Does it even matter or should I just go ahead and install one myself?
I’d add one.
The purpose of a shutoff is in case of float/needle failure the engine doesn’t fill with fuel resulting in engine damage due to fuel dilution when it starts.
@@BellyUpFishGarage thanks man
You do good job!
Helped me a by a Million times.
Thank you for me I turned it tight and it worked
Great video. Which screw do I need adjust if the carb is acting like it has not enough fuel under load. New go kart but after a long run it'll give a hard time starting and die when pressing the gas pedal
Nice work mate great info.
Thank you man! You explained it perfect simple.
adjust your needle placement for a better throttle response...fyi
Adjust it to what clip position? Mine is in the middle...
@@JM-yx1lm adjust it lower on the needle. It will raise the needle in the main so it gets more fuel.
Where's the part where your spend a whole day just trying to get it to idle and then go to sleep pissed...
Fortunately, using this method, I’ve been able to avoid that part. ;)
Hahajaha you a fool homie
Great Video‼️ Combustion Engine Wizard... 😂😂😂
Thanks for the tutorial. In my case I cleaned the carb and started my machine. Idles super high with the choke open full. When I try to dial the choke down it dies.
Make sure your slide isnt installed 180 out. Ive worked on one where the slide was put in wrong, meaning it needed turned to where it would slide down all way in..
One more thing, make sure you dont have vacuum leak..
Any info on electric chokes...dont think mine works, but how do you know and if its un plugged will it be open or closed? Great vid by they way👍😉
these carbs must be pretty common on all chinese stuff i have a mini dirt bike im messing aorund wiht for my sisters friends hubby and the carb is pretty much teh same as this one
I think they’re extremely common.
you need a gold medal this is the best totorial ever sub and like
AndrisBoost If it helps 1 guy help his kid have a better day, that’s medal enough. ;)
Thanks for the video this might help my quad
Thank you , helps a lot
So you're telling me I'm a wizard
Welcome to the guild!
My question. If I were to turn the idle screw all the way in how many turns out before it's set to where it needs to be to where I can start adjusting it or tweaking it a little bit?
2 to 2.5ish.
Hey I know this is ak old video but when do you need to move to bigger jets? Because I’ve heard after you start to modify you’ll want a bigger carb and to try different jets. Couldn’t I just richen my stock carb out a little with the screw?
The Kodiak carb I ordered from Amazon did the same damn thing idles good but craps out when I give it gas unless it's on half choke and I see no other adjustment screws except the one with a spring on it. forgot what ya called that one
Now how do I do this when it won't run without being choked ? It's a brand new carb.
Are you sure it’s getting fuel? I’ve seen brand new carbs come clogged, depending on the make of the carb.
You're the man, thanks!
Is it normal that the idle screw that there’s a pic on the over side of it that sprays out fuel?
2005 wilderness Baja 250cc I have one it will idle but not rev I thought maybe the carb needed cleaned
I get a slight full throttle bog but it picks up a little bit if i play with the choke, any advice??. The video was very helpful thank youu🙏🙏
Sounds like it could be going lean. I'd try to tune it a little more.
You need too raise the needle jet one clip, the needle is lifting too early allowing too much fuel from the main jet too enter the engine too close to idle.
That's why it's bogging just off idle.
David Griggs how do you do that?
@@dirtballnvegas9311 I was referring the guy that made the video and his bikes bogging just off idle but i will explain it to you.
If you undo the throttle cable end and remove the slide and needle , on top of that will be either a threaded cap or a clip of sorts that keeps the needle in position .
Remove this retainer and the needle should be able to be separated from the side .
There will be a C clip on the needle with notches above and below the C clip that you use too adjust when fuel from the main jet enters the engine because this needle when in the rest position drops down onto the main jet blocking fuel from there until it's required.
The bike in the video had the clip position too low and was allowing fuel from the main jet too enter the engine because there was a gap between the needle and main jet which you don't want when the bike is basically still at idle .
By raising the clip position it allows the slide too open allowing more air in and for the idle jet to do it's job and the needle too open later removing that bogging that you can hear in the video.
Hope this explains it for you 👍
David Griggs thank you so much brother. Mine is having this problem. It’s brand new. I appreciate you.
@@dirtballnvegas9311 When you pull the needle and slide out before you go adjusting the clip height pull the bowl off the carby and remove the main jet check you don't have a obstruction in the needle entering end of that jet or on the main interior of the body down where the needle drops through.
If this is all clear then shift the clip height 1 position at a time until it clears up .
Hey just a recomondation maybe a speed mower build in the future
Like… quad + lawnmower = speed mower?
Which way is more air and which way is more fuel?
More fuel, and less air, is done by turning the screw "out". Less fuel, and more air, is done by turning it "in".
This is going to sound insane..... but that warning sticker on the right, if you watch yourself do the carb talk and removal, in my peripheral it looks like some Chinese Dictator lmaoo
“Supreme Leader is pleased”
My air flow screw is flat how do I adjust it
If it doesn't have a slot in it, it's not adjustable. So, you'll the only adjustments you can make will be idle screw.
Thank u sir awesome video much appreciated!!!
tdub2399 You’re welcome. Glad it helped.
Hello sir, I have a fine Chinese ATV likes yours. My ATV only starts with the chock up and when I give it gas it dies. It idles high, not sure what is wrong. Your help will be appreciated to get this Chinese ATV on the road with the kids
Could be a lot of things, but it’s usually just a dirty carb.
You could try cleaning the carb. For the price of a new carb, I’d be tempted to just throw a new carb on there.
My chinese scooter was running until i tried to get the idle sorted but i turned the fuel mixture screw and now i cant start it its a keeway pixel 50cc
I replaced the carburetor on my son’s Tao Tao 110 Boulder. Starts up better than it ever has and sounds great. When I put it into Drive it has almost no power and eventually dies out… someone help me!
Did you follow the directions in this video? I’d say your air fuel ratio is off, one way or the other.
@@BellyUpFishGarage I did and it’s working ! Running very well. Unfortunately it’s moving on its own in D or R even with zero throttle .. what’s up with that?
@canadiancraftbrewerytours Could be a couple things. I’d start by bringing the idle speed down some.
Could also check the throttle linkage.
@@BellyUpFishGarage perhaps when changing the carb I installed the throttle cable wrong ?
@@canadiancraftbrewerytours Check and make sure the throttle barrel is in the sleeve correctly.
Thanks very much 😊
What do i do if my atv has a metal plate covering where the air fuel adjustment screw is? I have the same atv as in the video btw. I can post a video showing it if needed.
Sounds like you might be referring to a Welch plug. If that’s the case, if you have an air compressor, drill the smallest hole you can into the center of the plug and then blow compressed air into the hole and the plug will come right out.
I can’t find the screw that adjust is it something covering it?
Unfortunately, some of these carbs don’t have the needles that can be adjusted.
You’ll want to grab a new carb on Amazon. Make sure you get one that is adjustable.
I have a question mines bogs a little and it backfires ass soon as you let go of accelerator
Turn this screw clockwise,
Mines won’t start and if it does it cuts right off. Any idea what the problem could be
If you bought and put a good carburetor on there the throttle respond would be a lot better.
No doubt, maybe I should look into one.
good video very helpful
Sir, have you ever wired remote start/stop using harness from Amazon for the 50cc quad? I cannot find the 6 and 2 pin plugs it is referring to.
Wish I could help, but I have not.
what does it mean when it initially bogs under throttle (like shown here)
Could be a couple things - too lean or rich would be where I’d start. I’d see if it’s too lean.
If it’s neither of these, it could be a number of clogged things like jet, or a fuel line, or air filter.
Did all that. Thanks. Mine bogs down when pressing the throttle all the way. Any advice?
Bryan Dobbs What color is your spark plug? You could have a vacuum leak.
Take a can of carb cleaner and spray it around the engine, while it’s idling. If the RPM’s increase, you’ve got a vacuum leak.
@@BellyUpFishGarageI spray car cleaner and it turns off
I have a sunl 110cc which is pretty much the same thing you have. My issue is it won't idle but it will only go if I keep giving it gas by pushing on a throttle. if I let off the gas it dies.
Do you know what could be the issue?
Sounds like a dirty carb. Your jets are probably just dirty. Try taking it off and cleaning it.
@@BellyUpFishGarage oh, I forgot to mention it is a new carburetor
@@jorgepizarro3327 Could still be just some junk it from the factory.
Have you tried resetting the needles and going with a fresh tune?
@@BellyUpFishGarage I'm going to look at it in the a.m. I'll let you know what's wrong if I can resolve it 😂
I have same issue any advice
My pitbike doesnt want to start without the choke but with the choke on it starts good anyone got good advice
Blocked pilot jet
@@joeltamai8758 but i cleaned it and still only want to run on choke
I have mounted a brand new carb(keihin pz20) Did everything accordingly but it doest'n start. Is the screw with spring idle or air jet?
Sometimes they will both have a spring.
@@BellyUpFishGarage Thanks. Its running smoothly. But there is no acceleration beyond 6000 rev, only the noise changes between 6000-9000
@@tychusenfieldlarsson206 If it's revving higher, but you're not seeing any increase in speed, you may have a slipping clutch.
I feel like this problem started after I gave it a wash?
Hey guy,Lewis again,I gotta Raytech 125cc atv,I noticed it doesnt have a air fuel mixture screw just a idle screw is it any way I can adjust my air fuel mixture? Or is it just time for another carb? 🤔
I'd probably just throw another carb on it. For $15, it's not worth trouble shooting too much.
Whats the jetting your using ? The link in your desciprtion come with stock jetting?
I’m running stock jetting.
Any thoughts on porting/polishing the intake runner? Or do you leave them stock?
Johnny Turbo I’ve never really thought about it on these. Might be worth a shot. If I did it, I probably wouldn’t go to a high polish like 2000 grit. I’d probably stop somewhere around 600...
@@BellyUpFishGarage 🤔 i may give it a try. Why not lol. I love tinkering, especially if there is performance to possibly gain. 😁👍
My issue is that whenever I start my 110cc atv, it’ll just go without giving it any gas and will stay at a steady 8-10 mph without giving it gas, it wasn’t doing this before I adjusted the air/fuel screw on the carb but when I loosen it, it backfires,
Have you done anything else to the carb other than adjust the air/fuel mixture?
@@BellyUpFishGarage nope
@@AidenZebra have you cleaned your carb?
@@BellyUpFishGarage yep
M6 (main jet) are too small for my pz22 carb, are there M7 main jets?
I have two screws on mine,one has a spring and one doesn’t not sure what is what and i’m trying to get this thing going for my kids? Any help please
If you have two needles, it should be setup just like the carb in this video.