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HOW TO TUNE YOUR CARB | Carburetor Tuning Tips And Tricks! | 2/4 STROKE TUNING
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- čas přidán 2. 11. 2017
- A handful of tips on how to tune your carburetor. What's the main jet, pilot jet, and needle jet doing? What about the powerjet? Is setting the correct float level necessary? Does it have to be cleaned first? Where do you start? Full throttle or idle?
Tune your car, motorcycle, lawnmower, rc model, chainsaw etc.
The tips in this video can be applied to most carburetor equipped vehicles and tools.
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Omg I'm so happy I found someone who got straight to business and didn't want to run an online community College learning video on literally everything I don't need to know about a carb lol
This guy is a straight legend!
This is by far the best and least complicated tutorial I've seen yet. I honestly have been so lost but after watching this all the videos ive seen now make sense. Thank you so much!
Thanks man!
Great video, I've watched plenty others that take 20+ minutes to go over what you banged out in about 3-1/2. One of my favorite channels, love it when you find someone with genuine knowledge AND the ability to teach.
I made the mistake of dropping the needle clip while on the trail. It took all my patience to find the clip.
Incredible that you found it!
you can get clips like that at ace for 20 cents lol
@@hakuryuumax7575 in the middle of a trail? Oh didnt know that
I lost it during my ride😂 then my bike starts to slow down🤣
@@33du27 Yea every trail has an Ace Hardware. Thank God...
CRE torch is handy to see right down the hole of passages to check for any cooties.
And cleaning the carb is a good time to figure out exactly how it each system works in it by tracing the path of all the passages in it. Noting where the air bleed and fuel passages go and maybe mix together in it before discharging in the bore which can make it easier tuning if you have a mental image of sorts of how its all operating inside..
+AuMechanic Good advice!
Thank you for the great tips! The sense of humor on the 'red bowl' and 'losing clip on the floor' are great as well! Great Video!
Thanks man!
Wish I had CZcams when I first started working on motorcycles as a kid we just had to figure shit out or ask grandpa or look in a book 😂
I always run my two strokes richer, carbon and fouled spark plugs are a lot less detrimental then a burnt or seized piston!
@@MidnightCoding Good luck racing against bikes that run lean
@@MidnightCoding and i could compensate it with 4ccs and running lean again
@@MidnightCoding i get what you mean but the bike is realible on factory jetting. Not rich or lean just perfect
Jesus H Christ Leaner= More power in a 2 stroke.
nice short and comprehensive video, no need to read through thousands of forums for me anymore👍 i once lost a needle clip on gravel ground in that case its faster to get yourself shiped a new one instead of searching for it hahah😂😂
+P33TMusic Thanks! Yeah, I didn't even bother trying to look for it...
2STROKE STUFFING excuse me I got a aftermarket exhaust for my quad and they recommend rejetting which will stop the backfiring issue and could you just adjust the air fuel mixture to act as rejetting or no
+Cooper grasseth reviews No, the af mix screw won't effect wide open throttle enough, youll need to switch out the main jet.
2STROKE STUFFING ok and I watched a vid on it and they said it also needed a bigger pilot jet
hahaha dam! lol
Lay the needle on a flat surface with the e-clip opening down then just push the needle down with your other hand holding the e-clip. Very simple and you won't risk bending the needle or losing the e-clip.
thanks
How can anybody dislike your advice. I am sure they have thier problems. And where is thier channel? I drive Volvos, those unlike are into a world of hurt! Love you my friend
Honestly I've watch this video atleast 4 times in the past few months. Great information.
A GOLDMINE OF QUALITY INFORMATION!
‘’truttl’’ i laughed so hard
He his finding difficult with English
What is there to Lough 😞
"Tingvoll" I laughed so hard
Hi Mr Stuffing , all these procedures were followed and apart from drilling out the needle hole in the plastic slider [ luckily i noticed the needle wouldn't pass through easily allowing shim s to function , AMAZING ] i have smooth strong power on tap. Can't thank you enough , cheers
Good tip on the pilot- hey man, so ive been working on bikes for 20 years, and still trying to find out how to achieve max power. Example - couple of years ago my best friend bought a little 90s fzr400, we test rode it and it was SMOKING fast. Pulled all carbs apart to put kits in and clean them - did some minor float height checks, new floats etc. When we got it back together it still ran very good but was lacking that "Awesome" power it had before.. Earlier example - my first adult bike was a 77 cb750- i ran out of gas once and a guy picked me up with the exact bike just dual cams, he almost rode me off the back, all stock - I couldnt believe the power!! Im still stumped! I have JUST used a GAUGE style bike carb sync tool for the first time (made my own manometer one before) and will know next week if this has been the issue all along! I would usually tune pilot jets for max vacuum - THEN make adjustments on idle vac, AND compare at part throttle and tune the carbs on the part throttle more than idle.. Hopefully this works well and is the correct approach.. Anyway thanks - great tips! (pun intended)..
Good day. Based on my experience, prior setting pilot and main jet and needle, we must set float level first. I waste a lot of times try to rejetting, and still can't figure out the perfect combination, because i neglect float level. Eventually i realized my float level is to lean, after set it right, i can gain fine power in low mid and end rpm. Saving your time by set it float level first, hope it helps.
I didn't listen carefully and made scrambled eggs out of my crab.
You, Sir, appear to be a Magician and Know your way around a Carb like Errol Flynn knew his way around the Ladies lol
I, on the other hand, am a magician and know my way around PC`S, If you lived around my neck of the woods, I would gladly trade you a PC custom build for a carb tune :(
I have a 1997 HONDA VTR 1000F FIRESTORM and it hesitates, pops farts and sometimes backfires and this is great for the audience but makes me a little nervous at times as you can understand from my point of view as a rider the bike doesn`t seem to be Happy or Smooth in its fueling, I feel a few hours in your hands my pride and joy would be MAGNIFICENT and would make us both smile.
PS this particular model is a 90DEG V TWIN with whopping 48mm Carbs and I know as you are reading this you have a BIG smile on your face:)
Thank you for your video sir but I am too afraid of making/upsetting my carbs as unlike you I am NO magician with these Fuel Atomizers:/
Your Reply/views on what to do to fix or indeed tune this Beast would, of course, be most appreciated.
God Bless you sir, and ride safe!
Tried running seafoam through it?
Having some trouble getting mine started. I'm back to watch this again for a refresher.
First I made sure the floor was spotless, then I started on the carburettor on the floor so I can find the clip if it runs away :-) Excellent video, sir :-)
Good plan. I'll be keeping that in mind in the future. I just lost my clip. These things are notorious for this, I guess..
I know my way around a carb but you my friend are on a level very few even know about! I wish you lived in the US!
If you not have compressor, you can blow it with tire pump. Close big cannels and connect pump into bottom drain. Air go every holes eventually. Maybe for iddle jet that is too harsh, because it can inclute some metallic filler? I got some clogging with them.
That carburator is actually looks like keihin product and the type is pwk 28 a famous carb and easy to tune in indonesia i use it on my 2 stroke yamaha
Fantastisk! Vil begynne med mopedtrimming nå, men er enormt usikker på forgasser tuning.. Så håper på flere videoer der du utdyper.. TUSEN TAKK
the rc fuel valve is a brilliant idea! i made myself a powervalve system using a pilot jet, but this method is neater though.
+Mohammad Farhan Sukarjo Thanks!
Sooo wait, I could just use a larger main jet and use this RC valve to adjust levels?
On my Honda CR80R?
@@2STROKESTUFFING .
Is that correct ?
I'm have an old Yamaha aerox 100cc with a 124cc bore kit on it and the standard carb is 19mm I did change the carb size to 25mm and jets to suit it following people on the forums and it idles and runs fine apart from full throttle and it starts bogging down but everything below full throttle feels good , any tips on what I'm missing out on because I can't figure it out 👍🏼
Wonderful, much-needed video! I've both a 19mm & 30mm Oko that I've been racking my brain over. Question: Where'd you get the transparent bowl?
+Purnell Espinosa Thanks! Got it at a Norwegian store, but you can get them from most online scooter shops.
Old timer taught me you can also set float height with the carb and bowl off with the fuel line attached and fuel on then bending the float lever until fuel stops flowing while holding the carb as level as possible. Kind of messy though lol
Do you have experience with the WALBRO 37c carb. It's widely used on Paramotors. Your level of expertise on tips to tune this carb. or mod the carb for better mid-range performance is greatly needed and would be appreciated by paramotor pilots.
Sorry, not too familiar with them. Better midrange, leaner slow jet maybe, or lower the diaphragm needle slightly.
Good ideas now im going 2do the same on
my CR's
@2:20
I'm sorry, but that was funny.
And thank you so much for this video. I can't get & install an air/fuel gauge right now. This is big help.
Thanks!
I like it. No bs and funny.
I need help... you can send the link to jet's adjustable tap?👍👍👍
Hey I subscribed over this one! Nice mod
I would go further when you say tune the idle jet first, the idle jet meters a minimum fuel flow, it still meters the same fuel you have set it to flow at idle when the bike is at any other throttle setting, at full throttle the idle jet is still flowing fuel, it is impossible to tune a bike from the main jet backwards as changes to the idle jet after you have found a main jet that works for you will alter mixture at throttle setting where the main jet comes into play.
very helpful vids. where do you buy your clear float bowls? Need for a KTM two stroke
Thanks! Bought locally, sorry
Takker for nyttig tips. Har seriøst høyt forbruk på min sykkel, uten at jeg føler jeg får noe særlig effekt igjen for det. Jeg har byttet "alt": ecu,reed, potte, sylinder, innsug, filter og frogasser + selvfølgelig drev, clutch og alt av vekter fjærer osv... Så jeg har vel egentlig innsett at jeg aldri kommer til å få dette til å virke optimalt, hadde trua på at bigger is better på alt.... viser seg at det ikke stemmer helt :( men morro de få turene jeg lufter den i året.
I’m going to get my snow blower out first thing tomorrow and see if I can get more throwing power 😂
There's no reason why the manufactures can't make all jetting adjustments, accessible on the outside of the carb. Dials, screws, ect...
@@lobmin True. It's also bad publicity when you go riding with people, and your motorcycle runs bad or not at all. It would have been cheaper than going to fuel injection, tho...
Liked and subbed. To the point and extremely helpful
Thanks!
after how many hours of running do you spot "slime" in months of not using your powertrains ? E5 is in a short time with a "crystaline rests" at some fittings/tank infill , if the injektion jet is clean i still do not know but i ask my maintenence garage/dealer
it was not sand particle out of the durch coast line !!! E5 is stupid after few miles for example ~600miles
and silicone plus nitro methan (RC car 1:10 mix) starts smelling and bleaching the flex pipes if i was not playing for a year
Excuse me I dont get what you say what need to happen(when its right or to rich/lean) after remove the mainjet and go full throttle to find the right needle/-jet
Nice video. I have a question. On my Zündapp 70cc I have mounted a 24mm Oko D-slide carburetor. I have read that many people are blocking the 'Powerjet' system of the carburetor because it affects the adjustment negative. How do you think about this? Because the powerjet gives more fuel on the full throathle to cool the engine?
How do ineed to tune my carb for wheelies
but you didn't mention anything about checking the spark plug
Thanks very helpful infomation !
Awesome tips thank you!
Would you recommend a well kept 1993 zephyr 1100 with 7000km today? Are they relaible and good for daily riding and some fast twisties?
My bike runs best with the idle screw in all the way .. what do I need to do
Great video brother 😎
Thanks dude really helpful tips
short and easy video to comprehend
Hey man, I’ve got a Chinese 50cc with a flat slide carburettor I don’t know how to tune it. I recently put Racing ignition and big bore 70cc cylinder and head. Both engine and big bore kit was brand new I feel like the engine doesn’t want to rev or start it’s pretty Smokey and after 10 minutes of running the plug was pretty wet
For to see fuel level, clear tube from drain to upwards show level.
So I'm having a problem:
Full throttle low rpm, goes ok until mid range, just before powerband about to hit. There it starts hesitating/delaying/bogging/you know what I mean? But it runs good with less throttle.
Honda CR80R -01.
Any thoughts?
Cheers!
Could be it's going rich at the spot where the pipe is "fighting" the scavenging. Tricky, smaller mainjet could help, but could make it too lean up top. A powerjet tuned right, in addition to a smaller main would probably be the best solution.
Great information, thank you!
Is this principal the same for 4-stroke engines ?
Although a 2 stroke and 4 cycle engine are different, is tuning the carb principles still the same? My 30mm flatslide on my built 301cc Predator is kicking my butt!
Great video
I have one too from a old boat motor 1950s made in Ohio USA. And the bottom part is glass.
Hei. På min CR500 er tomgangsjusteringen på choken. Vet du hvordan jeg justerer tomgangen med choken? Hvordan jeg skrur den helt tilbake, og hvor mange klikk ut den bør stå på for god tomgang og enkel start?
Your advice rock ! You rock ! Thanks !
Thanks!
Dude you rock! I purchased an old racing mod fl250 2 stroke engine with a mikuni carb. When I putt it around at 1/4 to 3/4 throttle then close the throttle it wants to run on almost like a stuck Throttle. It will run like that for 10 seconds or so then fall back down to idle. If I am pulling a load it won’t run on. only on flat smooth surfaces. I Cleaned the carburetor & it still does it. Any advice would be appreciated.
Hello, can you recommend what type of needle should I buy for my PWK carb. I saw that there are a bunch of like JJJ, JJH, JJE etc. Thank you!
Very helpful info. Thanks
Thanks!
I got a 125cc moto and i wanna put a 150cc carb on it. Will it give more power? Please reply 😇
How much does the slide cutaway affect ? Can it be used to compensate for poor needles ?
It can, at least below 1/2 throttle.
could you explain how to choose carb size for different setups? Im in the process of tuning yamaha neos with minarelli horizontal, just purchased airsal cast iron 70 and wondered how to choose carb size and type (pwk, phbg and so on) for it. loved your channel btw, you are very talented. did you have any professional training?
My beta 400 rr runs funny on low rpms. I guess I should clean my carburetor? Too bad I don't have any experience... And new carburetor is so expensive, 1000€ o.o
My engine sputters when cruising. It doesn't do it under throttle. It does do it idle but, not as bad. I just changed the fuel filter and, never did this before the filter change. Am I running too rich on fuel or, does the needle jet need to be adjusted? 2001 VT1100C Honda Shadow.
Shud i use a power jet on my dayli driven bike? And how big shud that be
VERY DETAIL
What if it doesn’t stall right away, but like after 1-2 seconds.
Low idle
Can someone please explain what power jet does exactly….it’s the only thing I don’t understand
My 100cc 2 strokeengine bucks and jumps at low throttle,what can i do to stop that
Hi im having a problem with my scooter honda dio 1, i can make it idle and run good but after half throttle it bogs. will try this hope i can get some advices how to make it run good. awesome tips for 2strokes🤘
S as me here did you ever figure out what it was
hello i'm kinda new into those things. i have a 300 2stroke which doesn t keep the idle if i don t use the throttle. when i bought it the mechanic told me that the needle (in your video) was supposed to go up before starting the bike and then go down once started. any tips?
For my set up it is recomended a 30mm PHBH with main jet 135-145, min jet 58-60, atomizer 266-268, pin X3 throtle valve 40
But if i use a PWK 30mm, what jets do you recomend ?
Thanks for any help
pls make a video about adjustable jets with the rc switch
Hey I have this broblem with my moped when I fully open throttle and accelerate to the top it starts bogging. Then if I reduce the throttle to 3/4 - 2/4 the top speed increases. Running too rich?
Sounds lean, try a larger mainjet.
I am currently getting my carb tuned. And this is exactly what mine is doing. Clearly .y mechanic is learning but he started from a larger jet and the bogging happening. He told me he is next going to move the ring again. I don't know, I want to tell him to go back to the larger jet and move the ring then. Cause if he seizes up my engine again, he is gonna buy yet another top end and I am sure he is not wanting to do that. Lol. Thanks.
I know this is old vid but i hope U read this question, what's velocity stack U R used?
Hi, please can you tell me what's the difference between a 2t and 4t carburetor?
Hey so at half throttle? It boggs till i open throttle to full then it adventually revs out blah blah blah bla blah braaaaaaapppp . So thats the needle with goes up n down when u give it gas i have it 2 nd to top. So i go up or down?
Awesome videos love it do u think if u mix rc fuel with 110 octane fuel and run it it in a drag banshee it will more power
+david voges Thanks! The RC fuel (methanol and nitromethane) will probably not mix very well with gasoline. You could try to add some acetone as a mixing agent and see how it behaves. Running it straight or diluted with methanol is probably better!
I have oko flatslider 28mm carb. I enlarged one small single hole route of slowspeed jet and comes inlet side.doing this my bike gets starting problem.can you please advise what can I do for this please. And need to enlarge Turing swrew too to slove this problem??
my bike wont start, if i get it to start it will idle smooth but has no power when on gas
Why don’t you have an air filter on that carb, I don’t know too much but I’m pretty sure there’s supposed to be a filter
Har et problem med min moped at den dør ut rett før full gass(ca. 80%-90%), også er den helt fin resten av registeret! Hva kan vere problemet? Forgasser: Dellorto PHBL 24
+Bjynn 0 Har du prøvd å løfte nåla i forgasseren ett hakk(flytte klipset ett hakk ned)?
Would a new carb be anything reason for it not starting?
Just had to sub to your channel, I so love 2 strokes and you are crazy smart. But now I'm trying to tune a 4 stroke.
It's a yamaha FZ in a legends race car. It idles okay mid range okay full throttle okay but it
does not like coming off throttle to idle, it dies especially when it's hot.
How about a 4 stroke stuffing channel? haha
Brotherman, your to smart for me and I have a 3 digit IQ, ok, more than 101 and less than 150 !
T4
I think your videos are so helpful to folks, could you help me please. I have a lambretta scooter 195cc it when I ride it it seems to stutter a lot at low revs but clears when I open throttle more, any ideas to make stop stuttering please?
I like that you use a ram jet engine to heat up your garage.
never loose your needle clip, once you lose it, you will be like chicken, looking for the clip on the floor. hahaha
Great vid...many turtle🐢
Tbh the stock 28mm carbs on 2006 and up aprilia rs125's just suck, i just need to buy a different one, preferably a 34mm one.
I have a 150cc 4 stroke bike.
18 years old actually.
I want to learn the basic carb tuning, My carb looks very simple than yours 😅.
Can you help me out maybe.
Im absolutly in love with my bike and people around here dont know shit about tuning.
It ll be really greatful of you.
thanks :)
well pretty much run rich in winter and lean in summer you can check if you are running lean/rich if you take of your spark plug and inspect it.. brown is perfect, white is too lean,black is too rich if you dont find the perfect mix then better run rich
Mario Raja Thanks alot man !
Best way to learn is just do it. Pay as much attention as you possibly can though. A simple little screw up on carb reassembly can cause a no start and you're left scratching your head. So take your time and any screws that have adjustments, write down how many turns it takes to seat it. I always run the scres IN until it bottoms out and count the number of turns, to the 1/4 or 1/8 turn at least. Then just run them all the way in on reassembly and back off how every much it was to start then make adjustments if necessary. Biggest thing it just takes time, and try to be patient. I've been playing with bike carbs since i was like 11, and it took me years to really get them. Of course that was a decade before google and youtube.lol I'd have given my left nut for the info you kids have now. I HAD to just learn on my own, or some from buddies.
It's a four stroke... It's not that hard
@@salvadordollyparton666 So I'm relatively new to bike maintenance procedures. Carbs continue to elude me but I'm determined to figure it out. I removed the carb from a Buddy 125 I just bought because while it would start when giving any gas would kill the engine. So, figured a good carb cleaning was in order. Plus the seller told me that it could probably use a good cleaning when I bought it. That being said I dismantled the entire thing, cleaned throughly, used fine wire to clear the tiny holes and everything. However, in my naivety I didn't pay attention to the original positions of the pilot or main jets. Now I have no idea where to even start. The bike won't start at all now. How do I set up or reassemble the carb so I can get it running again. I feel confident I can tune it up once I get it running but could call I have done something so wrong that I can't get it back to where I started? I mean at least now it's clean but I'm at a loss. Any help would be much appreciated!
When I remove the main jet fully. The bike doenst stall but it does stutter alot at wide open throttle. Will I need a thinner needle or not?
You'll be fine with a correctly sized jet I think, sounds like it's overly rich without it.
I have a question. What would be the problem with a 2 stroke motor revving max RPM's when you first start it up without even giving it gas? It will max RPM on start up for like a minute until it warms up and goes back down to idle. I've checked and I don't think the slide is sticking or maybe it is? Any ideas what might cause the motor to start off on max RPM's on initial startup?
Probably running lean when cold, is the choke working?
Probably a leak somewhere after the carb where it is sucking in air causing it to lean out en revv high. If things reach temperature the leakage might seals because some rubbers or other parts expand