How to tune a carburetor / Carb | Whats inside.
Vložit
- čas přidán 29. 07. 2021
- How to tune a carburetor / Carb | Whats inside.
This is for the people that are mechanically friendly that know what a carburetor is, and understand how to take it apart. But just don't know how to tune, This is what each component is and how to tune the Carb. No extra stuff just Information!
If you are not familiar with a carburetor please watch this first.
• Cleaning a scooter car...
Get PJ1 Carb clean spray here:
scooterswapshop.com/products/...
Get the HELIX jet cleaning tool here:
scooterswapshop.com/products/...
Get the video likes up, and Subscribe we will do more frequent giveaways!
WE HAVE A APP!!! Get notifications about specific items and more!
IOS:
apps.apple.com/us/app/scooter...
google play:
play.google.com/store/apps/de...
Support your USA shops!
HTTPS://WWW.SCOOTERSWAPSHOP.COM
HTTPS://WWW.SCOOTERPARTSHOP.COM
For all marketing, advertising, collaborations, or sponsorship info.
Email Patrick: Pat@scooterswapshop.com
Send Mail/ promo items to:
Scooterswapshop
ATTN: Mail time Patrick
5807 Se Johnson Creek Blvd.
Portland OR, 97206
#Tuning #Howtotuneacarb #carburetor
PLEASE LIKE SHARE AND SUBSCRIBE! Make sure to click notifications to keep up to date on the latest and greatest happenings. ALL parts come from our shop in Portland, Oregon!
Thank you for your support!
HTTPS://WWW.SCOOTERSWAPSHOP.COM
HTTPS://WWW.SCOOTERPARTSHOP.COM - Auta a dopravní prostředky
This is a great start for beginners. I'd like to add a few things that DO MATTER! 1.) Air temperature change makes a huge difference it runs great in cold air and crappy when it's hot this is why! Cold air is denser and uses a richer mix. If you ride more in the hotter weather then you should lean out the air/fuel mix. REMEMBER
Doesnt leaning out the mixture raises the temps in a hotter wather? Pre bugs are usually aircooled
Yea I had my Clone tuned for the summer and pull it out this winter and it ran perfectly
Bro hot air means adding more fuel for it to burn right cold air is opposite
You can fit more cold air into a space than hot air, so pack a shit ton of cold air heat it in the cylinder and let that shit expand@@Mon3y_Counter.
Thanks for posting this. On my first two-stroke scooter tune, I’ve seen them to be true. In warmer weather, a 125 or 130 is working compared to a 135 or 140 in colder weather.
INSANELY USEFUL, exactly the video i needed - not so in depth to feel lost but provides all the information needed to understand adjustment without needing to understand the full mechanics of the system
Thank you for this really helped me out a lot with tuning my motorized scooter, just upgraded the carburetor on it and had issues with it bogging up hills or stalling on open throttle. Got it running okay now still needs more tuning.
By far the best explanation on how to tune a carb! Thank you!
Thank you for your insight. I have taken on the task of pulling the carbs off my Kawasaki Vulcan 750. Took them apart cleaned them and now putting them back together with all new o-rings, cleaned all the jets not replacing any off them. Changed one float valve on the rear carb but left the front alone. Will deffinetly be using your knowledge given to adjust them when I get them back on the bike.
Thank you.
All the questions I had about tuning my 24mm carb on my built bugeye, this video answered. Thanks!
These guys are awesome. I've purchased multiple items from them and they were easy to get on the phone and were able to answer my questions quickly and accurately. They have my business!
Thanks sir!
Yeah, they’re the place I’ll buy my gear from. They just know why they’re talking about, especially what works with what. Soo important.
Thank you 💓😊 for your vlog tutorial about the carbs it's something you give me a wonderful knowledge of what to do to adjust the carburetor thank you love your vlog.
Great video, and thanks for the amazing spark-plug lean/rich examples!!!
Super well done, great explanation, like reading carbs for dummies, and thats what I need!
Glad it was helpful!
Keep up the good work very detailed and explanatory been doing it for quite a few years so I totally agree with you everything you said Steve from Annapolis Maryland
You a Legend bro! Really Appreciate you. Been struggling with old low mileage Yamaha BWS 100 4Y that had sat in a garage for 12+ years. This IT guy figured it out after your cleaning video then this one. 👋😊
Very thorough video - thanks
Glad you enjoyed it!
Good informative video with excellent detail.
Greatly explained
Thank you. Explained perfectly.
Thanks for being appreciative!
Well explained seen another guy once take tape and Mark each position on the throttle so he could tell where the problem was when rideing down the road
nice
Very Good video- thanks
Great info's. Thankyou
Glad it was helpful!
Thank for well explaination 😉
May the peace, blessings, and mercy of God be upon you. I am Yasser. Thanks. For this simplified presentation. And the obvious. For this operation. I benefited a lot from the when explanation I have problem with LT 80 idle
Thanks for simplifying
THANK YOU.
nice.... thanks man
Brilliant info thanks, my bike is running good and idling fine all the way up to full throttle and then bond down but I've tried all sorts , just wondering if it's something simple that I'm missing
I’ll be watching this video about 10 times while learning to tune carbs
Does this apply to a 2 carburetor set up as well? I have a "84" Honda Shadow vt700c
The orange piece on the center of the carbrator, does it go feet down or feet up?
Will the air/fuel mixture screw also do 1 or the other depend on location.
As I have a vm22 and one video says that it’s an air adjuster screw even tho it’s located on the engine side of the carb?
good info.
couldn't get the Vento to run properly last night.
one more shot today and if I'm unsuccessful I won't be buying it.
nice
@@Scooterswapshop got it running. neighbor had backed the idle and air screws out too much.
now if I can just not get robbed coming home in the evening. at least it wasn't at gunpoint like the scooter robbery on Monday night. two in five days a block apart. I gotta move as soon as I can afford it especially as I deliver food.
the only other problem is the turn signals and horn not working.
the headlight low/high switch works and I know the flashers are good when I arm the alarm.
I guess I'll keep it. 2004 sitting since new I just rolled over 10 miles. R4 Triton 2 stroke 50cc.
I have a question, what about the Hond Navi carb, I see they reference to the screw as an A/F screw would the same apply that it is only a fuel adjustment screw since it is on the engine side? thank you.
So if I’m running a carb with the mixture screw on the airside and get 3 1/2 screws out from bottom, I need to go up a jet?
I've got a 150cc Chinese Tao Scooter and the exhaust and mufflerus missing. It runs and idles fine on its own, but it does backfire occasionally, and on top of that you can see flames coming out from where the exhaust connects to the engine (or whatever it connects to). Would adjusting the carb somehow fix the flames coming out of it? I haven't messed with it because I don't want to screw anything up while it's still actually running and not be able to undo it
Thanks
if there is a spring around the screw, it is the air jet.
I wish you would have went over how to fine tune the air screw. Thats the part that gets me. Something like turn throttle screw so idle is low, start with airscrew 1-1 1/2 turns out then turn 1/4 at a time; flick throttle to settle idle and do so until the rpms change, you do that on both sides (rich & lean) of the air screw until the engine rolls with out a stumbling. Is that for just dirt bikes?
Thank you for taking the time to make the video excellent information very informative. My favorite part is how you included the air screw most videos focus on the fuel screw.
There’s more to come :)
@@Scooterswapshop awesome! 💯
Thanks:-)
i want to ask is all carburetor 100cc work in any bike and i mean for example suzkui and yamaha
I have a problem with my aerox 2012. I have a Stage 6 replica exhause and i just bought a 17,5mm carburetor. I tried changing the main jets from 82-93 but it is really slow when accelerating. When it is cold it runs better then when it it hot.
I also don’t understand the purpose of the jets and screws. Does the main jet work when you are at max speed or when you pull the throttle max from a still start?
Great video! Question when your bike only runs with the choke on what jet needs to be attended? I have a 1979 Kawasaki kz 650. Thanks
First takes some starter fluid and lightly spray it around all the carb boots near the engine and carb (not the air filter). If it raises in throttle with choke off you got a leaky boot or cracked area on the housing. If no reaction then remember the choke cuts off air so it’s saying your idle circuit is too rich (go down a size in your idle jet). Then use the idle mixture screw and pay attention to this guy on which side of the carb your idle mixture screw is. Notice he says react with jets if it’s more than 3.5 turns out to stay running (with choke off of course
So I was stalling and bogging down on a high flow air filter at 35-40 mph , I put the stock back on and it only happened once but the high flow it felt more responsive on the low end but would shit out on higher speed. Would that be a air fuel mixture screw
145 main in a 32mm PWK
26hp on an 86cc AM6 stroker
👍
Programmable ignition helps the low end because not having a exhaust valve makes you want to keep things above 9k.
Peak it around 13.5k
Can I leave the air settings and just down jet it bc the jet is dif too big
Hello, i just bought myself gpx gentleman 200 and it has a weird carb, it looks like some of triumphs but its not and I'm trying to set it up because right now i have a problematic idle(runs but uneven).
the thing is- the carb has only 2 screws to regulate and also it has a diaphragm, first screw is on cord pulley which opens and closes throttle and the second screw is under engine side of carb, is it afr screw or not?
Where do the hoses go ? Where does the fuel line get connected ?
Wait, if the needle clip is at the very top or very bottom position I should get the next size needle depending on what I need? What if the needle clip is at the top position but the bike is running perfect? Do I need to change the needle?
Now I know My bike is lean after straight piping it😈😈 Thanks Sir
i have a Kymco Granding 250cc scooter.. it was not running since July or August last year due to the carburator overflowing issue.... the around last month i start to service the carb and it start back up.. and yesterday and today i start to run it on the road but when i go around uphill or try to give a full throttle the engine sounf like it about to stall or dosen't have enough gas running true the crab. what could be the issue?
These temp are really high except for idle
My athena sporting a/c run around 80 105celcius and temps goes down a bit when i go wide open for short period
I wonder do your bike really do these temps when cruising and wot? Im a bit loss atm cause i leaned my carb out a bit to get higher temps without any luck loosing more performance than gaining heat
So at 3:25 where you mentioned the air fuel screw being on the engine side or the filter side. Do the same concepts apply if you run premix
all the same premix or not
Hey I have a 2011 eton Beamer lll with a manual choke when I open throttle fully I bogs down and cuts off but if I move my clutch to about the half way I can get it to run but I have just open throttle partially half and do it slow not fast and far speed I can get is almost 20mph tops?
TY for your videos,,,,So tell me if this is correct when it comes to tuning a gy6 carb, turn the mixture screw until you are at highest idle, THEN adjust the throttle screw. When the mixture screw is turned in all the way in it should kill the engine, if it does not then you need a smaller pilot jet. Likewise, if you turn the mixture screw all the way out and you cant get highest idle the you need bigger pilot jet
just watch the video again Patrick explains the steps to take we are going to have one more hands on soon
Great video! You helped me out. I have one question; on my 28 pwk polini with 172cc cilinder and open air filter, my air screw is closed because otherwise it stutters when i want to start rolling with a little bit of throttle. With the screw closed it still stotters but not so bad as it used to. Should I open de screw and change the slow jet or should i leave it closed and go from there? Regards from Holland!
I would change the jetting re watch that part in the video
@@Scooterswapshop thanks. I watched it again but im still wondering if i should re-open the air screw or not because it is getring a lot af air from the open filter
Piaggio engine? Have the same setup on my Gilera Runner swapper Zoomer.
What it means when your power bomb pipe is cherry red when the atv is just sitting there in neutral for awhile?
I have bt80 I Road it over 800 miles and now I can ride it a bout a mile or less it fills like it's vapor lock when I give it gas it's like I'm not getting gas I use my bike to work it under 4 miles need advice
kawasaki vulcan 750 keihin cv 32, if engine chokes betwen(mixture is to rich) 4000-7000 rpm should i replace main jet ? needle doesn't have regulation. In service manual piot screw should be1/3.4 from bottom to start regulate. engine turns to turnover if pilot jet is about a 1 turn from bottom. Engine have backfire often.
I just picked up a keeway hurricane now I wanna go fast
Every time I come to a stop it dies I started back up and it idles fine. Run the great at top end but when I come to a stop it dies. Any ideas
This might be a dumb question but don't you risk blowing out your engine if you leave the throttle at max?
I might be talking out of my ass but on engines with carburetors there isn't a rev limiter since the carb itself is supposed to limit the revs. However, if your carb isn't tuned, the engine could spin faster than what it can support... and then bad things happens
Am I completely off, or does this make sort of sense?
My motorbike suzuki 110 SD 2004 butterfly carb ....please help me the setting
Do u need to ride the bike? For the full throttle test. or can you do it with the bike on a stand & wheels in the air.
You have to ride it
There is this liquid level tool, 4 levels.
Instead of using on 4 stroke 4 cylinders, use on 2 stroke single cylinder, OHP, OHC, SOHC not-DOHC.
The idea is - 4x feed to 4x exhaust through single cylinder with 2 valves, one for intake and one for exhaust. Number 1,2,4 sequence, starting from 2 to 3 to 4, to build levels-graph for 1. The psychology is to treat each line as rotating fluid, 1,2 3, 4 rotates to 2,3, then 1 and return-cycle to 4. Starting with lines, tune them assemble as 1 line amd 1 exhaust to test.
The serious hobbyists will have to guide and write and share with the other hobbyists. Not all will understand. 4 lines 4 levels. Minus one on max, volume flow in-total. Float ball in plus 2 cylinder 2x2=4, cube 1 is stupid-volume, 2 to 4 to 1 is cube-volume 4.
I disagree with GCE-O-levels. Special treatment for electrical DC flow, too. I refuse to admit my results.
If you got a 4 stroke scooter and you wrap the throttle quick and it cuts out is that to rich or lean been banging my head on this
Got the same thing have you found the problem I'm thinking it my be the needle wants letting up.
@@jeffmee763the clip was on #4 on the needle I move it down to #3 didn't get a chance to try it yet got late but seems ok didn't want to make too much noise my exhaust is little loud
My top end is good full throttle just weird when going from a dead stop my air screw is half turn out on the cp 21mm an if I bring the air screw out more then it gets worse
watch the video again and adjust accordingly also remember cvt tuning
Fo sho it’s just bogs on the low end from a dead stop the rest is good
Hi. I have a 50cc scooter and the only way i can get it to run good is with the air/mixture screw removed from the carb. Any suggestions please.
Plugged pilot jet. Clean entire carb.
I have a 28mm sunworld 45 pilot and 125 main and the idle screw does nothing. I can bottom it out or completely remove it and the rpms don't change. It moves the D slide up and down too it's really weird it's on a 90cc minarelli Drr.
if it moves the slide that's your idle adjustment that basically moves the d slide if its doing nothing then you need to make sure your cable isn't too tight and maybe clean your carb
I'm having problems with it staying running on idle but will go 55mph at 6k
How do we check temps and where? top of the cly head, middle of the jug?
At the spark plug base
Hi, i know this is a two year old video, but im desperate and need help. I have a gilera runner sp 2003, it has an orginal stator and ngk iridium spark plug, i’ve tried everything with the carb but at high rpm the bike sputters, like someone is pressing the killswitch, if i let off a little bit it goes away…. I need help
It has a stage 6 mkii racing 70cc
Stage 6hpc crank
21mm dellorto
Stage 6 intake
Stage6 mkii r1400 exshaust
So ive got a qeustion..... opposite the pilot screw ive got a outlet..... once i open my feul line the fuel just pours out from there what may the problem be? Its a honda 125cc
Lol it's a fuel bowl drain it's nice for draining bad gas entirely out of the system... or changing floats
Okay, I'm a little confused. If I am about half a turn left going in on air screw, what do I need to do with my pilot?
Hi I can’t really answer that as I don’t know the issue what your trying to accomplish etc.
Hi, i just want to ask u, is polini pwk carb really made in italy?cause the casting is not as good as keihin japan. Its like made from taiwan or else.
The cp is made in Italy the pwk is Taiwan. But the pwk polini is better than any other pwk ive ran other than keihin. Keihin is best polini is right after it.
@@Scooterswapshop finally i buy the polini 30. But i think i need to adjust the float first. The float is too high, its not center to the body line
Hi, i have a weird rasping sound coming from variator, i think. Whenever i take off/the clutch grabs the sound starts(i have pretty stiff clutch springs on) and you can hear it all the time after the take-off but its loudest when the scooter takes off. Do you guys have any idea where is the noise coming because it has been doing that for over a month or so and its pretty annoying. Its a yamaha bws/zuma with a 70cc athena racing kit, 21pwk, stage6 variator and polini 3g clutch with stage6 wingbell clutchbell and aerox transmission.
sounds like something is wrong
check your boss pin is not burnt/binding/grinding or worn down on inside of variator, I had a similar issue
@@kainatticus What is a boss pin? My main language isnt english so.
@@Scooterswapshop I also found out that my clutch is not symmetrical so it kind of wiggles there is it okay?
@@radi4610 It's the thick metal cylinder on the crankshaft that the variator spins on.
What are water cooled good temps.
4t>? or 2t?
@@Scooterswapshop 2 stroke
@@Scooterswapshop? 2 stroke
My bike only runs with the throttle pulled. It won't idle by itself no matter how much I adjust the idle screw. I cleaned the whole carb also. Im lost,, please help.. Any ideas?
Also this carb is new to my bike.
You might have an airleak so its impossible to get ur bike tuned right then
sounds like a air leak Pressure test it we have a pressure test kit on the website
Cool. Ill look for leaks . Thanks guys! Much appreciated.
Screw you’re idle up an make you’re air screw rich the try lean
Need that sparkplug pic
Serach for spark plug chart or screen shot the video
What causes too much fuel consumption in bike canberator
Improper tuning
No one on CZcams show a step by step for connecting hoses.
There’s no way to do that as just about every bike will be different
Is that an aftermarket car that people would have to buy bet a lot of people just have the car radio that comes with the bike maybe do a video with a stock Yamaha And Honda carburetor so us regular people know what you’re talking about
Yeah I don’t understand is not my carb sorry
OK I can take my bike temperature where do I put the thermometer to take the temperature
carbs are all the same in the aspect of how to jet we have SEVERAL videos on carbs I suggest going to the play lists not sure what a bout a car radio your asking
REMEMBER THIS!!
It's ALWAYS safer to run just a little bit rich than too lean! Too lean (white spark plug) increases the heat and cause engine damage
Also 93 octane fuel might be too much! It burns slower than lower octane fuel. Higher compression = higher octane fuel.
I run a 66/80cc stage 4 race, 89 octane and proper jetted nt carb 44t and hit 46mph down hill and 35mph flat road
Don't tweek the carb adjustment before you are done with break-in and cut back the oil mix I use 8oz oil for first 2 gallons (break in) 5oz per gallon after the break in.
Can we just have the basic tuning wow that’s really confusing too much info but good video
Watch our videos we likely have 20 of them on tuning there’s no way to make one video on it as it would be two hours long
Tried everything 3 times. Adjustments, test. Replacing this and that. Even replacing parts twice. Took it to repair shop. Broke my heart. And no luck. 150cc vitacci spark scooter, GY6 MOTOR. The SCOOTER still bogs out when I give it gas. It start it idles. Throttle gently start to Rev very little then bogs out. I'm doing something wrong and I don't know what. I'm out of test to do or run. If I have to pay you tou answer. Please, please give .me a phone number. I hate texting. If I'm aloud or have to. I can text or tell you every test I ran 3 times. HELP ME PLEASE.
Carburators are tough set the floats change the main jet Bog is lean. Check other videos I hate carburator and electrical.
Damn. Come. Clean. Bro My girlfriend. says. that I’m listening to jack black!!! Let’s see more than the hands!!lol
Ps. I love ur movies _jb!
The chart made no sense and had no context
It made sense for everyone else…and the chart is made by mikuni, a massive carb manufacturer..
Still has no context or explanation. Saying exact science and most basic way qualify nothing. There are a lot more than 4 components to a carb. Maybe you should start with where the items you are talking about come from.
I rewatched this and the chart makes no mention of pilot jet, and stand by my my statements.
Samodel is waaay better than this channel.
WHO IS SAMODEL? There's 100s of millions of channels better than our channel, we dont do this to be the best, we do this to help people. Obviously not you because you know whos better than others. But thanks for the support with the comment and the view. See you back soon! did you at least subscribe?
@@Scooterswapshop check samodel out. Makes yasuni pipes from scrap. True moped mechanic
Nobody cares
Then why did you click the video..pretty sad you have nothing better to do with your time
I care, passionately
I actually have a few questions/ requests.
A needle video would be great, I've been playing around with the subject in my head, but I'm probably wrong as usual :). Would be cool if you'd make one some day.
. And is putting a lambda on a scooter overkill. Or a super great idea 💡. Regarding tuning.?
My pit bike has good power on take off an top end but has bad throttle response what good be the problem any help will be great and I did take out the baffle but it was doing the same thing bad throttle response ?
No way to know as I don’t really know anything about the bike. Likely it’s not jetted right
🤔 no talk about slide cutouts and emulsion tubes??
Understood this is just a simple explanation but high level tuning goes a long way. I've seen too many self "tuned" carbs that were far from being optimum. Usually too rich or lean because the owner couldn't find a sweet spot.
Hey man, why don't you play that theme song (I guess) for another 2 or 3 mins cause a min and a half just weren't enough. Yeah I was really gettin into that s**t man. Forgot why I was here it was so good man, sheeeit