HOW TO TUNE YOUR CARB | Carburetor Tuning Tips And Tricks! | 2/4 STROKE TUNING

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.
Support me on Patreon!
/ 2strokestuffing
Donate to 2STROKE STUFFING
www.paypal.com/cgi-bin/webscr...
Instagram
/ 2strokestuffing
twitter
/ 2stuffing
facebook
/ 2strokestuffing

[@kennyshaut9106]

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!

[@2STROKESTUFFING]

Thanks man!

[@DanBrianGerona]

I made the mistake of dropping the needle clip while on the trail. It took all my patience to find the clip.

[@2STROKESTUFFING]

Incredible that you found it!

[@hakuryuumax7575]

you can get clips like that at ace for 20 cents lol

[@33du27]

@@hakuryuumax7575 in the middle of a trail? Oh didnt know that

[@muhsinchepee326]

I lost it during my ride😂 then my bike starts to slow down🤣

[@Micscience]

@@33du27 Yea every trail has an Ace Hardware. Thank God...

[@impactproformance]

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!

[@Ratkill]

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.

[@AuMechanic]

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..

[@2STROKESTUFFING]

+AuMechanic Good advice!

[@P33TMusic]

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😂😂

[@2STROKESTUFFING]

+P33TMusic Thanks! Yeah, I didn't even bother trying to look for it...

[@SuzukiLTZ-]

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

[@2STROKESTUFFING]

+Cooper grasseth reviews No, the af mix screw won't effect wide open throttle enough, youll need to switch out the main jet.

[@SuzukiLTZ-]

2STROKE STUFFING ok and I watched a vid on it and they said it also needed a bigger pilot jet

[@edgewatersbestguitarist1524]

hahaha dam! lol

[@mathiasrasmussen2182]

Fantastisk! Vil begynne med mopedtrimming nå, men er enormt usikker på forgasser tuning.. Så håper på flere videoer der du utdyper.. TUSEN TAKK

[@johncoscia5258]

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

[@Jl4zio]

I always run my two strokes richer, carbon and fouled spark plugs are a lot less detrimental then a burnt or seized piston!

[@33du27]

@@MidnightCoding Good luck racing against bikes that run lean

[@33du27]

@@MidnightCoding and i could compensate it with 4ccs and running lean again

[@33du27]

@@MidnightCoding i get what you mean but the bike is realible on factory jetting. Not rich or lean just perfect

[@verttisyrjala2897]

Jesus H Christ Leaner= More power in a 2 stroke.

[@avalanche15301]

Honestly I've watch this video atleast 4 times in the past few months. Great information.

[@ericklewis5207]

Good ideas now im going 2do the same on my CR's

[@tjo4087]

Great information, thank you!

[@ARayMaddy]

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!

[@2STROKESTUFFING]

Thanks man!

[@mattprice37664]

A GOLDMINE OF QUALITY INFORMATION!

[@mybackhurts7020]

Wish I had KZbin 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 😂

[@Indeewoods]

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.

[@georgecroney6168]

thanks

[@ChuckHaney]

Having some trouble getting mine started. I'm back to watch this again for a refresher.

[@mattprice37664]

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!

[@Rensssie]

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?

[@nathansurname5275]

Liked and subbed. To the point and extremely helpful

[@2STROKESTUFFING]

Thanks!

[@daVidFonda]

Your advice rock ! You rock ! Thanks !

[@2STROKESTUFFING]

Thanks!

[@dakidp97]

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?

[@2STROKESTUFFING]

+Purnell Espinosa Thanks! Got it at a Norwegian store, but you can get them from most online scooter shops.

[@scalecraft4663]

Very helpful info. Thanks

[@2STROKESTUFFING]

Thanks!

[@bradsucks9872]

Thanks dude really helpful tips

[@fstarockaburns425]

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)..

[@rico.2463]

Hello! Awesome video!! With tons of info ;) this helps a lot!!! Question: I have the Keihin PWKS 38 ( GasGas EC300) but i can´t find a chart (temperature/altitude) like the ones of the Keihin PWKS 36 (easy to find on ktm or husqvarna website for example). Can we use the jetting of the 36 for the 38?! And then do some tweaks on airscrew or needle maybe?

[@TheForcedinductn]

Good tips!

[@2STROKESTUFFING]

+FORCED-INDUCTN Thanks!

[@bellamyc7895]

specially the one about losing the needle clip....very key to success lol

[@streetemark]

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 :-)

[@seriousskateboarding9938]

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..

[@cope7835]

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

[@frankg3278]

Hi. Your videos are brilliant! Do you know if a 4 stroke carb with work on a 2 stroke engine? I currently have a pumper carb but as I've now positioned the fuel tank above the engine, I want to use a float bowl carb...

[@jerryx2000]

Would you recommend a well kept 1993 zephyr 1100 with 7000km today? Are they relaible and good for daily riding and some fast twisties?

[@paansukarjo90]

the rc fuel valve is a brilliant idea! i made myself a powervalve system using a pilot jet, but this method is neater though.

[@2STROKESTUFFING]

+Mohammad Farhan Sukarjo Thanks!

[@rocknrye9273]

Sooo wait, I could just use a larger main jet and use this RC valve to adjust levels?

[@rocknrye9273]

On my Honda CR80R?

[@olekristianolsen1287]

@@2STROKESTUFFING . Is that correct ?

[@anchestor8694]

Thank You.

[@eddiesheeran5791]

Awesome tips thank you!

[@warrenfloyd1484]

Great video brother 😎

[@chavezhurtado6483]

I’ve rejected my carb about 4 times now, just adjusting the screws. Quarter minute into riding and the pilot screw from the first carb keeps coming out and bogging the engine. Any way to keep it tight and have it adjusted?

[@bassjumpblues3631]

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

[@mosgieman]

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?

[@franciscoxicoo4049]

I need help... you can send the link to jet's adjustable tap?👍👍👍

[@scandinavrider]

‘’truttl’’ i laughed so hard

[@lucifersgaming6011]

He his finding difficult with English What is there to Lough 😞

[@wifie9321]

"Tingvoll" I laughed so hard

[@theadventuresofshellyandfr5618]

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.

[@josephpinheiro9667]

Thanks very helpful infomation !

[@bigdevil1310]

How should i tune a 16mm kehin clone carb ive never had one its for my motorized bike and it come with a gt80 reedvalve how do i tune both

[@Rn0x813]

How do ineed to tune my carb for wheelies

[@MyBullhauler]

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

[@2STROKESTUFFING]

+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!

[@snowrideryz5832]

very helpful vids. where do you buy your clear float bowls? Need for a KTM two stroke

[@2STROKESTUFFING]

Thanks! Bought locally, sorry

[@apostoliskourakis9697]

Can i make it more sound louder from batterflyes ?? i have Honda CB400 Caffe Racer 1999

[@uibsen]

Is this principal the same for 4-stroke engines ?

[@strangerthings6824]

dude... you are so funny. great videos

[@jarikinnunen1718]

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.

[@tyflyer007]

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

[@markwhite8582]

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

[@WreckedRevival]

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

[@darylbabz5451]

What's the brand of your velocity cup?

[@Ronhickmott]

hi , i'm curious how the rc valve is set up, i'm guessing it works similar to the lectron power adjuster, it adjusts your fueling at high revs?

[@2STROKESTUFFING]

+Ron Hickmott Yep, adds adjustability to the powerjet circuit.

[@zacka8042]

sir can i ask something? what u call the gold one in your carburetor? i mean the gold im badly looking for that

[@lp-pf5el]

Where did you get that clear red float bowl? I likes that

[@vwfanatix]

Hi, please can you tell me what's the difference between a 2t and 4t carburetor?

[@shahafmizrahi2040]

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?

[@GhostRider_5903]

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.

[@hopelessdriver2584]

What is that gold thing on carb?? And what it is for?

[@2STROKESTUFFING]

+hopeless driver It's a velocity stack, but this one isn't very good. It was a gift and I think it looks cool.

[@happyraccoon4791]

I heard that two strokes build up hp when leaned out. When it pops on the top end go one main jet fatter. I also heard that two strokes run hotter when over jetted whereas four strokes run cooler. Any truth to these stories?

[@kilash17]

Great vid...many turtle🐢

[@observingrogue7652]

@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.

[@2STROKESTUFFING]

Thanks!

[@RalphLans]

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🤘

[@drewraymond1429]

S as me here did you ever figure out what it was

[@jamesa6272]

I like it. No bs and funny.

[@manoprathibha2058]

Sir , i need a help to tune my Dellorto PHBL24 carburetor tuning (two strock.-italy carb) Honda Mtx 125HRC(Engin similar to Honda NS125). Idle condition mixer rich. And runing fast. But seems to unburned petrol particles out from Exhaust. When it is tune to some level difficult to climbing mountains. Throttle needle in lowest possition(3)

[@universityrepairFL]

Hey I subscribed over this one! Nice mod

[@derknobit2616]

Wow really needed this video thank you Have the same carb on order from China. Are you still interested in doing a motorized bicycle

[@2STROKESTUFFING]

+derk nobit Great! Yep, I am!

[@derknobit2616]

Messed up may PayPal transfer will be Nov 7 for sure

[@2STROKESTUFFING]

+derk nobit ☺️

[@familymom07770]

I need one where do I buy

[@sheldon403]

I know this is old vid but i hope U read this question, what's velocity stack U R used?

[@jeremyrock9305]

Great video

[@jassson5769]

my moped takes 85 main jet,should i add 95 or 100?

[@diegogonzalez2288]

Would a new carb be anything reason for it not starting?

[@karlwalker1771]

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!

[@liveandletlive2894]

Tried running seafoam through it?

[@my1nzfe]

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.

[@royalauto6969]

Hellos plz video crankshaft jig tools

[@jaja990]

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.

[@kallekk01]

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?

[@2STROKESTUFFING]

Sounds lean, try a larger mainjet.

[@joegriggsjr.6511]

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.

[@andy11894]

where can i get a clear bowl for a pz26 :/ i cant seam to find 1 atm

[@user-ky3bk3yz3k]

hey man thanks for your videos !! i need your advice, what is the best size of main jet for dellorto sha 14 12 , 50 cc engine without flap valve and without resonator exhaust (sorry for bad English XD )

[@2STROKESTUFFING]

Thanks! That's a tough one, depends on alot of factors... Something in the 50-80 range probably.

[@user-ky3bk3yz3k]

Thanks for answer 😃😃😃

[@charlesbyromhammiii2594]

Are their different jet sizes for the power jet?

[@hks6546]

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?

[@2STROKESTUFFING]

You'll be fine with a correctly sized jet I think, sounds like it's overly rich without it.

[@trisrush9155]

Nice!

[@2STROKESTUFFING]

+Tris Rush Thanks!

[@dineshsudhakarrao7363]

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??

[@Postalguy1]

My bike runs best with the idle screw in all the way .. what do I need to do

[@plasmaglowmusic1655]

I didn't listen carefully and made scrambled eggs out of my crab.

[@Thelastoldstock]

Awesome video thanks . I have a question I have an Asun quad (chinese) 50cc . The person I bought it from said it needed a new carb . I tried t Starting it with the old carb in It with a can of quick start . It started and died almost immediately. I bought a brand new carb , installed it and the exact same thing keeps happening . Do you think you might know what I need to do?

[@maxrokatanski2466]

Look that your carb geting fuel.

[@motorific8275]

Hi sir can i ask? I just installed a 28mm pitsbike carb and when i idle my bike it dies can you help me? Btw im a new subscriber ☺️👌

[@cutty02]

but you didn't mention anything about checking the spark plug

[@shaunhuckabee5904]

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!

[@omkarshinde9939]

You're a genius.

[@2STROKESTUFFING]

Thanks...

[@vishnusree341]

Vm 26 or 24 which is performance?

[@alimsuzuki8125]

VERY DETAIL

[@bccapone837]

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 👍🏼

[@josephwilliams6050]

My 100cc 2 strokeengine bucks and jumps at low throttle,what can i do to stop that

[@emanueleditommaso9117]

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?

[@JS-yb1qd]

pls make a video about adjustable jets with the rc switch

[@pepelazy3249]

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!

[@g.bergervoet4505]

Your knowledge is limitless. Do you maybe know a place to get clear float bowls for mikuni vm-type carbs? Can't find them anywhere lol. Greetz.

[@2STROKESTUFFING]

+Von Bergerfurth Thanks, not close to limitless tho... Hmm, not sure about that one. Tried ebay?

[@Sketch1994]

I don't think you will find exactly what you need. You can though place a clear tube on the overflow, clamp it somewhere so it's vertical and open the float drain screw. The fuel level will be visible in the clear tube and it will be very precise (assuming you have proper venting).

[@g.bergervoet4505]

Sketch1994 there is no float drain screw in a mikuni vm20. I'm just interested in it for cosmetic purposes anyway.