Smartcarb SC2 vs stock Keihin on YZ250 - review

[@brysonthrom2388]

With the smart carb that is the cleanest sounding two stoke I have ever herd

[@dirtniron]

glad you like it!

[@scottmoore5719]

Agreed!!

[@TheKitchenTechnician]

The Keihin sounds more like it has an on and off switch. Unlike the SC2 that just sounds smoother. Better atomization by the SC2 in my opinion. It’s definitely on my list of must haves for my 2023 Beta 300RR.

[@MichaelSchwab-nk4rm]

This and way better fuel economy

[@RonWatson-b6u]

When I ordered mine, I gave them the changes I had already made to the bike (285cc big bore, etc). They sent it with the proper metering rod and it has run perfectly right from the start. The Keihen JD jetting needs a #8 slide to really run it's best. I went with the SC2 to avoid having to rejet for the big bore. They nailed it!

[@SmartCarbFuelSystems]

Glad to hear it!

[@tomnekuda3818]

Very clean carburetion.......that really helps with the control of the bike, no matter what the speed.

[@dirtniron]

thanks Tom, it does work really good!

[@singletrackmarc819]

@@dirtniron red or blue jd needle

[@dirtniron]

@@singletrackmarc819 red

[@Junior-fd8ux]

I like the honest review. Think i have to stick to a well jetted Keihin for the price point for now. Looking forward to getting my JD letting kit

[@dirtniron]

thanks man, JD will make you happy!

[@kubasaki1978]

I had a lightly modified (cleaned up porting, pipe, V-Force, 10oz flywheel, FMF pipe/s-a) '98 YZ250 and once I installed my JD kit, it was almost like I couldn't stall that thing no matter how low I ran it....It pulled crisp and clean from about 10 RPM all the way to redline....I was amazed..I'm curious as to the fuel range difference, actually measured, between the JD carb and this SC2 carb. I know my '98 was a bit thirsty.

[@douglasbyers174]

V

[@darnold7977]

Have a 2017 TX300. Installed a 36 SC2 on it and what a difference. Best money I have spent on any bike. I don't understand why new bikes still come with such an old design for carbs. I understand the Japanese bikes still having old stuff on them but KTM and the other good Euro bikes that are carbureted should provide newer tech carbs on them. Keeps the simplicity of a carb but runs like an injected bike.

[@robh3267]

It all comes down to money as that would add another $1000-$1500 to the cost of a new bike which already demands an exceptionally high price.

[@dirtniron]

yea, I dont think they can get smartcarb for the price they are getting their carbs now..

[@darnold7977]

@@dirtniron Very true. Maybe with volume and time they would be able to get cost down considerably. It's still crazy to me that the technology is out there and we are still fooling around with jetting.

[@davidramsay1055]

I have a good buddy who has a 02 ktm 380 EXC we built with a smart carb balanced crank boyesen power reeds fmf shorty and stock pipe with a new vertex piston an it will pull with 500s all day with better gas mileage less vibration an almost rides like a 250! These carbs are a massive upgrade to any bike!

[@dirtniron]

thanks for sharing David! that 380 sounds like a great bike, would love to check it out! local in California by any chance? ;)

[@davidramsay1055]

@@dirtniron I'll run it past him! We are looking for a good road trip Utah to California would be awesome 😎

[@robh3267]

If your someone who rides in different places all the time with drastic elevation changes the SC2 is probably your best choice but most people ride in areas with similar elevation conditions so it seems hard to justify the very high cost of the SC2 a well jetted Keihin performs about as good except for the gas mileage buy the time you factor in shipping and sales tax almost $800 for a dirt bike carb is hard to swallow a lot of the builders on you tube using these carbs are not paying for them so it's hard to get an unbiased assessment of weather the cost justifies the gains if cost is not an issue then the SC2 is an excellent choice.

[@dirtniron]

yes I agree, that was my conclusion at the end of the video as well.

[@2006BansheeRider]

Yes but unless you ride only when it's 80 degrees out then the temperature effects the mix ratio as well. The smart carb also adjusts for temperature not just elevation

[@SuperSensei420]

Awesome review. I love your videos, man. I've been looking for a replacement for my ancient mikuni on my husky 125, and a couple of months ago i stumbled upon smartcarb. I've been saving for a fuel injected husky, but now I'm thinking i save myself $9300 and get a smartcarb 😂

[@andreasjonsson8075]

Bartos this show of yours needs to come on national tv! It's as good as wheeler dealers.

[@dirtniron]

haha, thanks Andreas that would be interesting :) I like how you called me, Bartos - kids in the school used to call me that long time ago

[@andreasjonsson8075]

@@dirtniron It's not Bartos??

[@dirtniron]

Bartovic 😉

[@DdDten]

Great video! I’d be curious to see how the lectron carb compares to smart carb. For awhile that’s all I was hearing and seeing was the lectron.

[@marcust9918]

I’ve heard lectrons main benefit is people that go up in elevation a lot. And also you have to disconnect the throttle position sensor so it decreases bottom end bc the bike doesn’t advance timing like it should, but I don’t have any experience with it

[@DdDten]

Interesting I’ll have to look into it more. I heard Cody Webb does a video where he test both and stock. I think on his gas gas or beta whatever he is on now. I’ve been meaning to look it up.

[@dirtniron]

smartcarb has the same benefits, it will adjust to elevation and weather conditions, plus it has very easy external adjustments.. both carbs work on similar technology

[@cadencramer2747]

I went with the Lectron on my YZ250X because it was a bit over $200 cheaper. All you do is pull the slide out and turn the metering rod in or out to richen or lean the mixture and tune the low end, and there is an external screw for the power jet (top end only, like a main jet in a standard carb). It takes me less than 3 minutes to make an adjustment. It's so snappy, and in first gear if I'm just idling around and pin the throttle, I literally can not keep the front wheel down unless my chest is almost touching the handle bars. It will accidentally do little power wheelies in 2nd and 3rd if I'm on pavement. I've also never fouled a spark plug with the Lectron in over 15 hours of low rpm trail riding. If I had to say anything bad about it, it would be that it's a bit of a tight fit compared to the stock carb. It seems to compensate for the altitude and weather conditions well and fuel economy, power, and ease of use are all improved.

[@mixalis6168]

Friend has used both, and prefers the SC2

[@JayJay-mt2fc]

If you ride alot, then in the end the SC2 is gonna pay for itself just in fuel ecenomy. Fuel is very expensive where I live and my CR250 is very thirsty with my keihin, I might consider getting the SC2 in the future.

[@dirtniron]

makes sense, thanks for sharing

[@boburwell9921]

Got one on the way for my service cr500. Soo pumped

[@OldDirtGuy]

I'm glad you got it to work. I have issue however with JD Jetting. People buy it because their bike is delivered with the wrong throttle slide. One of my current YZs likes and 8 slide and the other likes a 9. None of the seven YZs I've had liked the 7 that comes on the bike. So they buy JD, who does a pretty impressive job of masking the problem. But masking a problem is not eliminating it. That said, if you can get the Smart to work, then it should work over a wider range of temperatures and altitudes.

[@dirtniron]

thanks for sharing

[@vince5946]

great video Rado, honest review. Do you feel that one of the carbs performs better than the other in the slow technical terrain? I'm wanting more low end grunt and smooth linear pull

[@dirtniron]

yes I think smartcarb did better in slow technical riding, had little more grunt from the bottom. you can hear it on that slow loose rocks uphill in the video. I was pleased with it

[@NirHason]

I have the SC2 36mm on my KTM EXC 300 2017 and the low-end grunt is way better than stock and also compared to TPI bikes. I'm in love with this carb, focusing more on riding rather than jetting, which is always good and if I do want to make micro-adjustments, I just use the clickers and you can feel an immediate change!

[@SourceADV]

+1 on the smart carb for technical riding. SC2 + GYTR flywheel weight makes the yz250X a tractor when needed.

[@jetdr]

I ran a Keihin for 8 years, worked great except it wouldn't lug and if you changed altitude or were in a high humidity environment (East Coast) you had problems. I put a Lectron and I do not miss the old Carb. I can Lug, I never foul any Plugs and I don't have to play with mix ratio when I am down South riding.

[@bryangolmitz4964]

great review. what gearing are you running on the yz250?

[@HXCENDURO]

I love my SC2!

[@dirtniron]

thanks for sharing!

[@davidwatson8315]

I know you have used Lectron carbs too and I was looking to get an SC2 but I can get a Lectron for cheaper. Do you feel the smart carb is worth the money over the Lectron? Thanks

[@danielarney9729]

Flywheel weight? Spark arrester/ silencer? All weather and elevation with one rod? Fuel? What about electronic connections and effect of not hooking up, how does it handle out of normal position riding vertical, horizontal, upside down, rythem section bowl turbulence etc ? Might pay for itself in race fuel savings

[@dirtniron]

No FWW, Turbinecore 2 with spark arrester

[@danielarney9729]

@@dirtniron that spark arrestor gets snotty on everything I've read. Going to put one on so neighbors don't bitch.

[@lichi0728]

Seems to me that with the SC2 the power delivery is more manageable ( 2 stroke power wise)

[@ridgeridermoto]

My stock YZ250X was a hard hitter for sure... I did the powervalve governor mod and gnarly pipe which helped smooth out the hit, and it's got good torque at low RPMs. But I'm curious how the SC2 would improve bottom end smoothness and torque vs something like an Apex head. The benefit of the fuel economy and self metering are a pretty big upgrade on their own. Did the SC2 improve the bottom end?

[@dirtniron]

It was very crisp on the bottom, comparable to well jetted Keihin maybe slightly better

[@zardportugal]

Great honest review! Cheers.

[@dirtniron]

thanks brother!

[@steve2239]

Smartcarb has two versions. My cast one was under $400. I think it’s better than Lectron which has a plastic float bowl and choke on the pipe side. Dumb! Also no jetting ever ! Works great on trails and tracks. You can adjust the metering rod with a rich / lean knob on top of the carb anywhere. My YZ285 has no spooge ! Runs great from idle to top end. It’s suppose to get better gas mileage too. Awesome carb right Rado ? 👍

[@JohnStill]

I have a Lectron in the box. Was supposed to be custom made for my bike. Im running a ‘05 yz250 with Eric Gorr 295 kit ported for broad power. I ordered a summer and winter metering rod. Bike detonated with both rods. Put it back in the box. Slapped the stock carb back on regret the $500 i spent.

[@dirtniron]

thanks for sharing Steve, Yes I think it is a good carb, I was happy I did not have to sacrifice the power and it still runs the same at different elevation and temperatures. Keihin with JD was pretty close in the power, but needs more tweaking when the conditions are changing.. it all depends where you ride and what you need from your carb.

[@steve2239]

Rado, never have to adjust my Smartcarb. Was sick of messing with jetting. We ride in the desert outside of Bend Oregon at 6,000 feet of elevation and she rips ! It’s like fuel injection for a 2 stroke. The best I can do until I win a new KTM on Dirt Bike Channel 😏

[@theexisting1514]

Do you feel like the power delivery is a little more smoother with a SC2?

[@dirtniron]

yes, but not too smooth

[@boburwell9921]

What ratio are you mixing? For your type of riding should be 40 or 50 to 1

[@Original_Major]

I want to see a smart carb on a dyno, I can't find a video anywhere that someone has done it?

[@PP-wz7mp]

Because SC2 has no more power than stock carb...

[@mxnoob729]

What about dyno them? That would be much better comparison 😇

[@dormantmenace]

No. Not on a 2 stroke. Big difference between useable power. And total power. It's useless if it cant be put down in a manageable manner. When and how you need it. Two strokes tend to unload all there hp an torque at the same time, especially in a motocross porting . And cc per cc. Pound for pound they make more of both than a 4 stroke. The 4 stroke Just provides linear power wich equals useable power wich equals traction. What really wins races. So there isn't much real world application for if it increases dyno number marginally

[@mxnoob729]

@@dormantmenace im not into the power increase on the dyno... more if there are any hard numbers to see if there are any improvements at the bottom/mid mainly... you dont ride on the peak all the time. Dyno is not about feelings

[@dirtniron]

I have some data from independent source, the Smartcarb was pulling 3-4hp more compared to stock carb

[@kenwoodall837]

I need to ride in Southern California. I'm tired of the rain in the Pacific northwest. Great build on your YZ. Will you be keeping it?

[@rztrzt]

You'll get tired of the heat & dust...

[@dirtniron]

thanks Ken! man, we can use some rain here ;)

[@clinteasterly1334]

I'll trade living spaces. Oregon wa and Canada looks like sloppy gnarly gun to me

[@SomeInfoSecDude]

I've googled for prices, SC2 is 2-3 times as expensive?

[@dirtniron]

around $700..

[@singletrackmarc819]

Try 10 times the price of jd kit

[@richdouche8253]

The factory carb is jetted to work "ok" everywhere within reason, but rarely ideal for an individual's particular elevation and climate. JD kits and recommended settings are tailored to an individual's area, so the factory carbs will work like they're supposed to and provide good power and response. The only advantage I see with the Lectron and SC2, is when you have wide swings in temp and humidity, and wide swings in elevation.... If you're never going to experience these broad changes, then I see no reason to spend $500-700 dollars on a carb.... unless you ride so much the increased fuel economy is worth it.

[@PP-wz7mp]

@@richdouche8253 Exactly!!!

[@phillipallred]

The price for these is wild ($900 for the one i wanted). Guess ill keep re-jetting, lol Their patent expires soon, tho. Hopefully we see more companies make this type of carb post-2030!

[@SmartCarbFuelSystems]

Why wait! Get the real-deal now Phil. Besides, we're always innovating. By 2030 we'll have even better offerings than today.

[@panic-revv85]

Stock carb has way more over rev. Ive bought 2 used yz250s with lectron carbs and immediately got rid of them. The PWK36 and 38 are king for the yz.

[@SmartCarbFuelSystems]

Don't confuse the SmartCarb with the Lectron. They are not at all the same thing. For one, Lectron's "38mm" carburetors from the 38 HV to the 38 H-Series to the new 38 Billetron and Billetron Pro all measure 34mm at their narrowest cross section. SmartCarbs on the other hand are true to size. You buy a 38mm, you get a 38mm, along with more top end overrev than the Keihin size for size, guaranteed.

[@itsumoto87]

I love Sc2

[@nicholasmorris617]

Be good to compare the smart carb and a PWK with the STIC

[@dirtniron]

yes, I will do it one day for sure

[@mc9304]

What size spring do you run? I’ve got a 6.2kg/mm and am worried about the air boot rubbing

[@jeffgoetz7919]

did it take you a while to get the smartcarb dialed? did you have to change metering rods at all? i'm having issues getting mine to work well. i'm also riding a yz250. thanks!

[@jeffgoetz7919]

my apologies, i see in your video that you did change to metering rod. would you happen to remember which one you switched to? thanks so much. great channel by the way. subscribed!

[@dirtniron]

thanks Jeff, I dont remember but you can reach out the guys from Smart Carb, they will help you out for sure.

[@BudadudTV77]

Hallo I from Indonesia, I like smartcarb2

[@iwanttobetankman4260]

I want to try to put this carb on a car engine and see how it works. I'm going to need to hook the vacuum advance up somewhere else and mess with some other vacuum lines, but it should be possible. Getting the proper amount of fuel is would be a challenge too. An old gm inline 6 would work great I could easily cut up an intake manifold and weld a new piece on to fit the carb.

[@dirtniron]

interesting, let me know how it runs

[@nicklathrop5191]

In DreamWorld you could put one per cylinder an really let er' eat!

[@zackiaryruddick701]

I have a yz250 2023 and there is two cables on my bike that connects to the stock carb , when you order a smart carb it only gives you the option of one cable , dose anyone know why that is? Do you not use the other cable anymore???

[@SmartCarbFuelSystems]

Hi Zack, we assume you're talking about the electronic connectors on your stock carburetor, correct? If so one if the TPS (3-pin) and one is for the electronic power jet (2-pin). The 2-pin connector is left disconnected when using the SmartCarb as it does not have power jets or any jets at all. The 3-pin connector is what we offer with our MagVolt TPS option which allows you to keep Yamaha's 3D ignition mapping feature. Reach out to SmartCarb direct with any questions anytime.

[@reecehignett95]

Init the smart carb was miles different and sounded way better then the other one!!

[@dirtniron]

thanks for the feedback, it runs really good with smartcarb

[@panic-revv85]

The yz tps controls the power jet which is on a silonoid.

[@SmartCarbFuelSystems]

That's true! It's also used by the ECU for 3D ignition timing or dynamic map switching based on throttle position. SmartCarbs for YZ125s and YZ250s include options for TPS to retain the stock 3D mapping and unlike the Keihin with TPS, ours use linear magnetic sensors. Zero additional moving parts. The sensor reads the position of a magnet in the throttle slide through the wall of the carburetor.

[@txwicked1804]

How does the SC2 compare to the lectron carb? I’m tired of having to perfect my jetting with the stock yz carb ? I just want to get on and Rip not have to worry about all the other stuff

[@dirtniron]

I did not compare them back to back.. SC2 did not have a power loss..

[@TheNic899]

Hey! You said you replaced Metering Rods. Was it sent to you, was it included or how did you replace it?

[@dirtniron]

it was sent to me afterwards, supper simple to replace. Its similar to a needle replacement on Keihin or Mikuni carbs..

[@G58]

Do you know anyone who’s fitted a SmartCarb to a four stroke? Thank you for sharing your experiences with both solutions. Ride safe

[@dirtniron]

its mainly for 2 strokes

[@G58]

@@dirtniron Thank you. I’m aware of that, but when I contacted the manufacturers they said they work on four strokes too. I’m just trying to find anyone who’s fitted one to a four stroke engine.

[@lonnierichardson7581]

How did the spooge look with the smart carb?

[@dirtniron]

good, I showed the pic in the video

[@danieleferrario1168]

How many kilometers did you do on a full tank with stock carb and how many with smartcarb?

[@dirtniron]

I did not measure it, sorry.. but smartcarb is better on fuel

[@PP-wz7mp]

@@dirtniron bullshit

[@mmholling87]

Smart Carb vs Lectron?

[@dirtniron]

they work on the same principle, smartcarb has external adjustment and choke on the correct side.. I did not compare them back to back on this bike, so its hard to compare the power..

[@pablomay28]

Where are those trails? Im in Socal and the cops closed off a popular spot in Hemet

[@dirtniron]

around Hemet :)

[@jamiewhite38]

I’m currently building a 01 yz250 super moto with a lectron carb. Has anyone here super moto’d a 2-stroke? I have a lot of questions or just live and learn lol

[@metacuore]

why nobody tries the 40mm carb on the yz 250? i don’t get it, maybe it runs faster and better

[@metacuore]

i mean i saw a video of a 125 yz with a 41mm, it ran so frk good, higher rpm and nice and rich crisp feeling you know

[@SmartCarbFuelSystems]

We've had people do it, especially in some 300cc top end kitted bikes/snowbikes. The main thing is signal at the metering rod. Too much carb and that signal gets too weak for proper fuel pick-up and atomization. Reach out to us direct with questions about sizing for your particular YZ250.

[@TubolMotoadventures]

How much clicks leaner did u go from factory based setting?

[@dirtniron]

I dont remember exactly, play with it one click at the time and see how it feels

[@grahambartsch3195]

I've been telling myself that the stock Mikuni with JD kit in my 17 KTM 250XC is "pretty dang good" but it just doesn't sound as crisp as this bike, with either the SC or the Keihin. Glad the kids are already through university, otherwise I'd be spending their tuition. Instead, I'll be spending their inheritance! haha. Wondering if the PWK and Stic are as good as the SC? Price is about the same...

[@dirtniron]

haha, thats funny! either of those two options would run well, depends what you need.. I think smartcarb would have better fuel economy and power is fun as well, STIC runs great too

[@moneymaker099]

I don’t know nothing about dirt bikes but my uncle gave me his old 2006 dirt bike and its a racing one i want to ride it but I don’t know how and its too powerful for me that I don’t know how to ride is there a way to make the bike less powerful?

[@dirtniron]

you can play with gearing and dont twist the throttle too hard :) take it easy

[@luisquinta3137]

I, can you tell me what rod you use on smartcarb?

[@SmartCarbFuelSystems]

A-Q07 for stock YZ250s in most cases, A-Q05 for those that are ridden more aggressively, are running high compression, or are running California pump fuel, and A-Q03 for very hot setups (very high compression and/or snowbiking, supermoto, desert racing, etc).

[@6.7Rollin]

you can get the same from a Kien, its just tuning. For dirtbike companies to sell them they put the carb in a safe zone

[@SmartCarbFuelSystems]

No, even a best-jetted Keihin size-for-size will not give the same performance and efficiency as a dialed SmartCarb. The difference is greater fuel atomization and greater resulting combustion efficiency.

[@6.7Rollin]

@@SmartCarbFuelSystems you can dial in a carb to be just a good as the smart carb.

[@SmartCarbFuelSystems]

@@6.7Rollin we've had factory mechanics try, and fail.

[@6.7Rollin]

@@SmartCarbFuelSystems 50/50 percent of guys now are ditching the efi for regular carb conversions. im sorry, i still stand as a properly jetted carb will run best

[@SmartCarbFuelSystems]

@@6.7Rollin ditching EFI for carburetion is our MO and we welcome it either way. Please stay tuned with our efforts. We may yet convince you

[@maxrpm2215]

Try stock carburetor and offset over bore with JD jetting.

[@dirtniron]

i am not familiar with the setup, can you explain

[@maxrpm2215]

@@dirtniron Sure, there's info on the web about it. I have an 06 KX250 2stroke the carby bore is stock at 38mm. Ive bored it to 39.2mm and offset it 1.2mm so the bottom where the slide closes is the same. What you get is very little change if any at the bottom end power but from 1/8 throttle it becomes a different engine. More power cross the rest of the power curve. You will need to rejet bigger main 1 - 2 sizes larger straight way, it will run lean. More air/fuel = power. A good 2stroke engine tuner will know. Try this link for diagram and better understanding. thunderproducts.com/carburetor-boring-for-optimum-performance/

[@andreasjonsson8075]

Super video 👍

[@dirtniron]

thanks Andreas, glad you like it!

[@Stone881]

I would like to see a test of the SmartCarb for MX

[@SmartCarbFuelSystems]

Dirt Bike Mag is currently reviewing a 38mm SC2 on a 2021 YZ250, article dropping February, and we're planning some collaboration with MXA in 2021 also so stay tuned!

[@maximusmurua4437]

Where are you riding, San Diego?

[@dirtniron]

kinda.. San Bernardino forest

[@ironmonk962]

I love your channel man just love the way you make content I've a suggestion plz visit Nepal 😞 all dirt bike are Chinese and not good I want see you riding your bike in my county

[@dirtniron]

thanks brother! Maybe one day!

[@harm97]

Sounds better with keihin

[@atienzayoj8413]

i love two stroke,specialy dirt bike,

[@muiemunteanumuiebratuleanu3692]

do u have FFW on that yz ?

[@dirtniron]

no I dont, just custom porting for more bottom

[@mbalunovic]

JD jetting is a popular choise but not best at all, a properly jetted bike is much batter than a JD jetted one... the JD will fit few bikes, but is sold for all bikes (same needles)... that is a joke. There is no such thing as ideal needle...

[@MCervi42]

Eeh yh, but 800$ for carb, just doesn’t worth it. I mean it’s cool m but why not to swap it with injector? Cheaper and will give much more.

[@alfredvonseherr4337]

🙂👍🏍

[@GeneMcEntire]

Tried one of those on my '18 TX300 and was very dissapointed.. Got it installed fairly easily but did have to modify the airbox a little, no biggy. Had the bike running great at 60* and 4800' elevation. First ride out I went from 6000 - 9000 and it was just a joke IMO, changing elevation and airtemps is supposed to be automatically adjusted by the carb but sadly it didn't do it at all. I must have adjusted the rod 10x on that ride and it would run great for a little while but would be crap again after a few hundred feet of elevation change. My stock Mikuni with all the Jarvis mods is a substantially better setup and doesn't rape you for $700.......

[@SmartCarbFuelSystems]

Hi Gene, it sounds like your SmartCarb was not working properly for one reason or another. The boot trim is required for proper air density compensation and once made the SmartCarb will compensate for any elevation/temperature you take it to provided nothing else is going on with it. We see that you communicated with us by email in July regarding the trim but there was no further communication from you regarding any trouble. Furthermore it appears that you purchased the carb used, or at least not from us direct. We are happy to assist any SmartCarb user first or second-hand. If you're having trouble we can't help you if you don't reach out. If you still have the carb we would be happy to assist you to see the results that Rado and our other customers are seeing.

[@flingndirt_UT]

@@SmartCarbFuelSystems Wow, nice catch :) I did in fact reach out to you regarding it and was able to get the boot trimed properly. Fortunately I was able to borrow that carb from a freind who bought it new and was having similar issues with it so he gave up and bought a Lectron which also has it's own wierd issues which I experienced with mine. Honestly if these things worked as claimed I'd be all over buying one but from my experience they simply just don't work as claimed and $700 is a lot for a carb that is a downgrade from the stock carb. If you want to prove me wrong and are willing to send me one I'd be happy give it another try and then if you can make it work better than my Mikuni I'll send you the $$ for it...

[@SmartCarbFuelSystems]

@@flingndirt_UT Yes you did reach out regarding the trim, but you didn’t communicate to us that you were having running difficulties. Not sure if your friend contacted us either before giving up. That both of you had issues suggests that something was amiss with the carb. We would have been happy to assist either of you in getting the problem sorted. The video we’re commenting on clearly explains that the SmartCarb isn’t a downgrade from stock. They work as claimed for the vast majority of our customers all over the world, Rado included. We regret your experience but we’re well past the point of sending out units to prove that they work. If your friend still has his, have him reach out to us.

[@GeneMcEntire]

@@SmartCarbFuelSystems No worries from me, I'm happy enough with the killer performance I'm getting with my MIK right now, spending $700 just makes no sense after what I experienced. Also, I know my buddy had worked with you guys several times before jumping ship to the Lectron. I was really hoping it was the silver bullet you declare in your advertisments, had it been you would have for sure got $$$ from me but as it stands I am not impressed enough to give $5 let alone $700. I'm glad it's working for others or at least they have convinced themselves it's working and not just a sugar pill......

[@TranThanh-yr7pn]

Sc2 mua về Việt Nam chắc hơi mệt

[@BERZERKERSV4]

$700 for slightly better than a $80 jet kit and pit bragging rights?...pass

[@dirtniron]

plus you dont need to jet it, or touch it once you have it dialed in, elevation on weather changes are not affecting the performance, - thats a big thing for plenty of guys

[@coloradodirtbike5930]

@@dirtniron that was the main reason I purchased one. Messing with jets all the time, changing out needles in winter versus summer, and crappy fuel breather tubes looking messy, sucks. Self adjusting and internally vented smart carb is the only way to go. Smart carb is pretty on point too, you tell them your engine mods, and fuel octane (with gravity rating) and they have a pretty good starting point to go by.

[@skylerhealyvlogs9642]

@@dirtniron not to mention on top of everything you said, it definitely has a good effective on gas mileage as well. I have a lectron on my 2005 yz 125 and the fuel economy is much better. It helps especially when I am running race fuel which is expensive for the track. Lol but race gas is the best stuff for your motor to run on.

[@danieleferrario1168]

@@skylerhealyvlogs9642 with 8 liters how much miles did you do with stock carburator and now how much with the lectron?

[@skylerhealyvlogs9642]

@@danieleferrario1168 I couldn't tell you exactly how much miles I gain. I don't ride enduro or trails. I ride on the dirt track, but I noticed that I'm not burning through gas quicker and the lectron doesn't shoot out alot of gas into carb like the regular oem carbs do.

[@jimwil6972]

Another good video. Trump👍👍

[@dirtniron]

thanks man

[@brianheim8439]

Why not just learn how to properly jet for rider preferences/altitude and you'll save 600.00!!

[@nathandyess5310]

This carb offers more benefits over a properly jetted conventional carb besides just performance gains.

[@dirtniron]

you can do that, but this one gets you better millage and it will adjust to elevation and weather changes.. so no more jetting adjustments. It is not for everybody but for many guys its a huge plus.

[@atienzayoj8413]

isit posible,can i have one those bike,250 ktm two stroke,,,i whis some one can donate me one those

[@brianmartin414]

A waste of money. A lectron knock off that weighs a ton.. no way to tune the individual circuits. Made using mikuni parts from the 1970's. Too rich one area and too lean in another. Go ahead and buy different needles( or whatever) and waste more money trying to get it dialed in. In the end you will go back to the keihin anyway. It feels more linear because it only has one circuit. No power jet like a lectron carb. Its longer than the keihin too so your boot is cramped. Overpriced crap that only makes your wallet lighter. Buy it and your friends will be impressed with your stupidity. You have been warned.

[@SmartCarbFuelSystems]

You're incorrect on nearly every point there Brian. SmartCarbs are not Lectron knock-offs and they don't use parts from the 70s. The only similarity is that they both use a metering rod. SmartCarbs have numerous patented features that set it apart including internal float bowl venting, variable throttle rate venturi profile, external adjustability, and TPS option. There's no need for multiple circuits in a carb like this. The metering rod grind profile and the internal venting handle the fueling better than multiple circuits do and they do it with much finer atomization resulting in more complete combustion (more power) using less fuel. Speaking of the rod, you just set the bottom end using the external clicker adjuster (takes 10 seconds to do) and go. If you need more or less fuel mid to top you swap the rod (takes 10 minutes to do). We refund any rod returned to us 100% per our exchange program. People don't sit on rods they don't need. We aren't in business to sell rods like other companies sell jets. The new SC2 model SmartCarb is shorter end-to-end and doesn't distort the airboot. We encourage you to actually try the new SC2 and see for yourself.

[@brianmartin414]

@@SmartCarbFuelSystems i have tried you first gen "smart carb" and wasn't impressed. The floats , arm and float valve are all mikuni parts...am I wrong? All the technical mumbo jumbo doesn't justify the cost or fitment issues or the excessive weight. If I can't find parts for it in stock at local shops , its not a carb I want on my race bike. this is more for people who like to stand around talking about how much money they spent on a conversation piece.

[@SmartCarbFuelSystems]

@@brianmartin414 that's fair. But we've come a long ways since the first generation. The SC2 is the 5th generation billet model. Today we use the Keihin's latest POM style one piece float paired with Mikunis latest TMX 3.8mm viton tip needle & seat. We even upgrade the o-ring on the seat to a more durable viton material. Again the fitment issues are no more. The SC2 was made significantly shorter to be a direct fit. Parts including rebuild kits are readily available from us for any SmartCarb model ever sold, including the first gen models. SmartCarbs are seeing more and more pros adopting them for competition. They're not just conversation pieces. Cody Webb competed all year using one and Louise Forsely won the AMA Extreme Championship with it too. Nick Fahringer became the first American to win any class at Romaniacs (he took Silver), SmartCarb equipped. They are proving out their performance apart from racing too. Just last July we helped take 5 new Bonneville speeds records on a turbocharged YZ125 in an R6 chassis. Same carb and metering rod in it that we set the dirt bike guys up with. We can't change your prior experience, but do consider taking another look. There's a reason we call this new one the SC2.

[@thulsa5218]

Anyone that thinks a smart carb or lectron is a better carb than a Keihin has no idea how to tune a carb and has no business near bikes. Keihin is superior in every way

[@dirtniron]

yes, Keihin is great carb. however it needs jetting adjustment with elevation and weather changes - thats the major advantage of these aftermarket carbs.. some guys dont want to keep playing with the jets..

[@thulsa5218]

@@dirtniron they dont need that many adjustments. People act like they are going to mount Rushmore and back to sea level which is hardly the case. The truth is the more adjustments your carb has the better your bike will run if a skilled tuner is doing the work. The Keihin has far more tuning circuits than the lectron so it will ALWAYS have the potential to run better. You will NEVER see a lectron or smartcarb on any factory team bike for the simple fact that they cannot run as good as Keihin or Mikuni.

[@nathandyess5310]

@@thulsa5218 you seem somewhat misinformed. Have you had any personal experience with a SmartCarb? The truth is that a perfectly tuned Keihin doesn't stay perfect and you don't have to go to Rushmore to experience jetting drift. A few hundred feet of elevation will change jetting, a few degrees temp change will do the same, hell even a cloud going by will have affect. Sure, less discerning riders won't notice or care but for those that want perfection in their fuel metering, the SmartCarb does that and it does it every day, elevation, temp, they even compensate for turbo boost... More jets doesn't equate to better performance or even tunability; what does is fine fuel atomization precisely metered and mixed proportional to the atmosphere, both its density and velocity, falling into the engine. In that regard the SmartCarb is unmatched and you'd do well to keep an eye on those factory teams you say will never use a technology like this because they're starting to.

[@thulsa5218]

@@nathandyess5310 no need for me to write a saga about carbs. I've heard the whole "superior atomization" from hear today gone tomorrow carburetor makers for 40 years!! When it comes to carburetors the more tuning circuits you have the more precise you can make you bike run PERIOD! Lectron and smartcarb are a joke compared to Mikuni and Keihin in that respect. And listing to people talk about jetting on the internet is "pie in sky" because what is considered runs good for someone can be considered soggy ass for another. 95% people online have no flipping clue about tuning a carb properly and what is considered precise tuning. These are the type of people that think lectron and smartcarb are the best things since sliced bread because they are for kids.

[@nathandyess5310]

@@thulsa5218 nah let's hear it. Thing is, this technology isn't "here today gone tomorrow." Lectron came out in '74, just a bit more than "40 years" ago... Keihin and Mikuni's choke designs were borrowed from the original Lectron among other features. These aren't new concepts. The 40+ year more developed single circuit SmartCarb does it right though with internal venting, variable throttle rate venturi profile, plus external adjustability. Believe it or not there are people, racers, teams, companies out there that know how to tune a Keihin or Mikuni that are finding the SmartCarb to be the superior performing carb. I'd tell you again to stay tuned for high level adoption, Rado here among them, but you seem to prefer jetting instead.

[@danielevaldemarin3276]

which metering rod did they reccommend to you?