The Best Carb Money Can Buy? | SmartCarb SC2
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- Äas pĆidĂĄn 2. 12. 2021
- The SmartCarb SC2 automatically compensates for altitude without changing jets, makes more power and uses less fuel in the process. But is it the best carburettor money can buy or better than a Lectron carb?
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For an extra 700 dollars you could have just. Bough a fuel injected bike and not have to fuss around with all that stuff so is it really worth it
And you should see if you can do a bike review on an onyx motorbike
But great video though
@@pascalkargut3237 name any fuel injected dirt bike that is only $700 more than any Yamaha YZ new or used. There are many bikes in the world that arenât fuel injected that have a lot of life left in them. This SmartCarb offers those riders fuel injection performance and consistency but with carburetor simplicity.
Can i have one? For free
Jokes but it is a nice carb bro thanks for sharing
In the pre-FI era, it was common to use a Gunson Colortune see-thru sparkplug to visualize the colour of the fuel burning. You then tweak the carb mixture screw and or needle to get a nice blue hue for near ideal mixture. Too yellow means too rich, too white means too lean.
First time I hear of that, definitely need to check that.
Exactly I had bungs on my 302 SBC where I could view each exhaust Port...too achieve blue flames.... indexing plugs and length of wire timing... recurve air gap Etc..... Remember the race car called Blue Flame... AIN'T IT JUST AIN'T IT đ lols
The ol color tune. I love when people in my motorcycle groups have problems with tuning and I mention the $35 color tune and they have no idea what I'm talking about
all that just for a computer to do all it way better
â@@ameunier41have one myself. Can recommend.
the catch? the price, obv. as for planet killing - enthusiast bikers, classic car drivers etc. are not the problem. we're a quite sustainable drop in the ocean compared to the real problems.
Yup, the government just loves to ruin any fun for anyone but doesn't touch the rich people who give them donations
VOLCANIC ACTIVITY.
Blowing up methane gas pipelines releasing 500,000 metric tons of greenhouse gas into the atmosphere equivalent to 30 years worth of pollution from every car and motorcycle ever made might also be an issue.
â@@jackandblaze5956look into ocean shipping. Each shipment wastes more gas than 100k cars will burn through in the entire lifecycle of the vehicle. Once you start doing numbers and adding them in different sectors you realize how wild it is that they want to tax us for driving cars "to save the planet". It's bullshit.
also a old car that gets 9mpg with 150k miles is alot better then a new car that gets 20mpg
Those big claims about fuel economy and power need to be tested, i'm extremely skeptic
We agree. Third party testing and verification of our claims is something we welcome. Dirt Bike Magazine, Cycle News, EnduroPro, and most recently MotoVerde in Spain have all done tests and published articles about their results. Pros like Cody Webb, Diogo Vieira, Pol Tarrés, and more have all attested to the gains in power and economy in competition and we've had a hand in setting a number of land speed records with 5 new Bonneville speed records just this last July.
Thank you for your interest, we hope you stay tuned.
I too find those hard to fathom, there are a number of reasons why 2 strokes are less fuel efficient, but the carburetor is not going to be the main one, if it's working correctly. Mikuni and Keihin have been making wonderful carburetors for many decades and while I'm not blinded to the idea that a different approach could have slight benefits, I do not believe that a properly tuned traditional carburetor is not going to produce almost the same results. Most 2 strokes come from the factory with a tune that is rich to keep engine internal temps down and provide longevity, stock carbs can be tuned accordingly for more power and reduced fuel consumption, but with risks to engine life.
@@SmartCarbFuelSystems this company is the goat
@@SmartCarbFuelSystems maybe something for Project Farm to try out
With only a low and high speed circuit, the mid range will be compromised. This is where fuel economy is usually the greatest due to engine design. The typical mikuni has three circuits in this size range so economy will typically be greater. Fuel injection atomizes fuel to a greater extent than a needle jet and is infinitely variable when has feedback loop.
I have a lot of vintage motocross bikes. I've tried the Lectron on two of them before I heard of SC. After I had one running real good with the Lectron I swapped to a SC to see the difference. The SC works better by far and the ease of tuning makes them a dream to jet. Because as we all know, old bikes were close at best with their jetting. The SC got even the most fineky of them running so much better then I even thought possible. I also have them on my modern off road bikes, Beta 300, YZ 250, Beta 200. I'm my book it is the best carb made, period. I hope this helps. It will be $ well spent.
Does this company make carbs for 4 stroke engine's?
@@dukecraig2402 there's no difference between a two stroke or a 4stroke bike carb only if you have efi a simple pwk carb will work on both engines. I don't now about SC but I think it will work .
@@user-uz5nv4hs8d
I see there's a 40mm, that's the right size for what I'd do with it.
I didn't know if there's something special about these that's for 2 strokes because of the electrical connector I see in one of the views.
I'm definitely going to investigate these and see if I can get one on a Sportster, I love tinkering.
I've heard lectron described as the "best drag carb"
Do these modern 2 strokes have some kind of electrics in their carbs?
I haven't been around 2 stroke bikes since "back in the day", here in the states they're virtually non existent anymore, last I heard there was only 1 or 2 models you could buy here and even then I haven't seen (or heard) a 2 stroke in years, all the dirt bikes I see guy's riding around here anymore are all 4 strokes.
Regarding those stripped screws on the Keihin, have you tried using a JIS screwdriver? Using a normal Phillips on JIS screws (like Japanese carbs) is a recipe for stripped screw-heads. They *look* the same but they aren't.
While I personally am aware of that.. *feature* , I don't feel like that's something we should have to deal with. A hex is a hex; if it fits, it fits. Philips/JIS screws suck.
I used to hate flatheads, but after hacksaw-converting hundreds of stripped fasteners into flatheads, I definitely prefer them, or hex cap.
@@Cheezeball99999 socket head torx are cool especially the ones made of stainless steel.... Expensive but for the one time user and doer not a great expense at all for a single purpose equaling very cost effective.... And by pushing a few buttons on your smartphone will open up the world wide Web where all can be found.... eBay and Amazon's good place to start.... And if you have to you can find where the original manufacturers are located to buy directly from them if necessary..... Just saying I know where you're coming from as I used to work at a vintage Harley-Davidson restoration shop.... Where the motorcycles were previously adjusted and maintained from what looked like hammer and chisel work... And your job was to bring it back to life with modern day technology and performance that can be done for many many cubic dollars versus pounds of fun
@@donniebaker5984 I use Stihl bolts and screws wherever I can since I'm a Stihl tech đ€Ł
So T27, T25, T20 for me.
Nothing wrong with Japanese fasteners if you use the correct tools; Japanese Industrial Standard (JIS) screwdrivers will remove those âPhilips headâ screws without damaging them. Use the wrong tool and you pay the price!
If you don't have a JIS screwdriver take a #2 phillips and sand the tip down until you get a perfect fit in the screws.
Good video. I've been running the SC2 on my Sherco for close to a year now. I ride big elevation changes, one ride may be at 2000' and the next at 9000' so not having to make any adjustments and the increased fuel economy is huge for me. It's all the advantages of FI without the added complexity and still retains the performance and feel of a carb.
I really like your channel and my SC2 ;P
What kind of increase in fuel economy did you see?m
Does this carb work on any bike? I have a 180cc Indian bike.
@@ollie6512 You'll get about 30% more out of a tank, my TE300 does about 110km to a tank now, was about 85 or so before. Seems like the gains are reduced if you're doing lots of hill climbs though, but I haven't been able to measure that in any scientific way.
There is no great carburetor feel. You are dreaming or have virtually zero knowledge of mechanical principles. Carbs provide no difference in "feel" except when the weather changes and the run worse. Fuel injection is "ALWAYS" superior to carburetion when tuned and is why manufacturers have virtually all went injected. You sound like all my fellow mechanics in the seventies when they said it was the end of the muscle car era. We currently have cars with more HP than was "ever" available in the 70s. Modern cars are more fuel efficient per HP, lighter, better handling, more dependable, quieter and more comfortable to drive. And not one of them has point style ignition, drum brakes and --- carburetors. 90% of guys could be handed two different bikes same size, everything but one has louder exhaust and you'd all say the loud one has more power. If you think carbs are better you also think that WWI, WWII, Spanish flue, the great stock market crash, the depression and polio are what made the good old days so good.
Have the SC2 on my 250 SX, thing was different right off the bat. Instead of being an uncontrolled powerhouse, my bike became gentle and easier to ride thus helping my lap times without losing any noticable power. Gas lasts me 1 week instead of 3 days. Def worth
250sx three wheeler?? Iâm interested if so
I have one on my KX500 and it was the best decision ever. Runs strong regardless of temp or altitude like they claim, starts easy, and always idles smooth and steady. Just up to you if you want to drop the $800. I'm glad I did.
A CO-meter is best way to find the right click position .. get or find one for most performance. Minimizing CO will tell you the right fuel/air mixture (taking your fuel into account) and its surprisingly sensitive.
That was a very well mdare video, mate!
I'm running the SC2 on my KTM 300 EXC 2017 for the last 2.5 years and that's the best thing I did for my bike (along with the suspension).
Just discovered this channel sitting in PTA...great channel and great carb...love that someone is improving the high maintenance design.
Installed my SmartCarb on my 2017 YZ250X a few weeks ago and it's a night & day difference from the stock carb. Incredible performance!
Great carbs, I imported one in 2014 & fitted it on my KX500, Corey from APT assisted me with the setup and it was quite straight forward. I did the quads4quads run from Carnival City down to Ballito without any issues related to the altitude changes. Itâs worth the money. Great episode man, I recognized Rhino Park straight away.đ€Ł
I had to double take when I saw the NP200, then noticed Rhino Park đ€Ł
Smart carb has the best customer service hands down. I reached out after buying one second hand. They helped me thru multiple detailed emails, to get it setup, knowing full on I bought the smartcarb used. Cleaned up the mid range huge on my YZ285 big bore.
I'm so glad my 150 came with this carb. It's so simple and the bike runs so clean.
Cool video! I'm currently rockin' a Sherco 300 FST trials and it would be so intersting to see how the SC2 would do at a Utah competition with lower revs, lower compression, and slower speeds.
The reason for this carb being "self adjusting" is the same thing that happens on a normal carb; the thinner air decreases the vacuum signal, less fuel comes from the float bowl, and the bike runs essentially normal. Often times, when you go UP in elevation, the only thing you need to do is increase idle speed a bit. I've gone from 1,800 feet to 8,000 feet on many different 2 strokes (with quad vent keihins and TPS's, I might add) and many different four strokes (CV style carbs found on LTZs, Predator 500's, FCR Carbs on 250/450f's, Mikuni VM's and TM's on my old school vintage bikes) and the only thing I've ever needed to adjust on the four strokes is the idle screw. The only carb's I've ever needed to change jets with to not foul plugs were 2-strokes with the Mikuni TMX 36's and 38's, which are notorious for being very finicky.
Maybe it's just me, but I don't understand how having only 1 main form of adjustment from idle to over-rev is an advantage. If you want the ease of adjustment, use a Dial-a-Jet on a normal carb, and save yourself enough money to do the next 3 or four top end jobs, lol.
The reason this carb compensates for changes in air density better than other carburetors is its use of a metering rod and integrated, internal float bowl venting. We've tested up to 22,000 feet on drone applications with very minimal variance in A/F ratios and we don't take into account the elevations that our customers ride at. No need for it. There's a difference between dialed fueling regardless of large changes in air density and getting by with good enough or not fouling plugs.
The advantages of single circuit fueling is that there are no overlaps or transitions between multiple circuits. It's one continuous curve. Of course that does require having the correct fuel curve or metering rod grind installed and positioned. We make it as easy as possible for our customers by selecting the metering rod they need based on information about their setup, mods, fuels, etc and by positioning it for them, erring slightly rich. Most customers lean the rod out a few clicks using the top clicker and tweak the idle RPMs to their liking using the set screw and that's it. No further adjustments required.
@@SmartCarbFuelSystems how do them go in dual carb bikes? I might be interested in this just for the fuel saving on my daily. Though getting my mikunis tuned more than just by ear might help too
I donât have a dirt bike, but on my street bikes, there is a lot needed to adjust a stock bike to altitude... Iâve brought many bikes from sea level to 5k feet and all of them run too rich. It requires minimal adjustment (either a needle or jet by one size or notch) it still needs it. Just my experience.
Save your money. These things are a waste of money.
@@GingerNingerGames you should never tune âby earâ. Always tune by what your spark plug is showing you. A carb with a metering rod like Lectrons are really night and day. When I built my drag banshee for 1/8th mile some years ago I switched to gas lectons, picked up a lot of ET. When I switched to methanol Lectrons, it was game over! Iâll never use anything but Lectron on any of my bikes
Just saw a video by fortnine explaining whether a carb is better or fuel injection. Would recommend.
Saw same video! It was good yes!
They do make a good argument, for both methods.
carb = more fat raw power down low from 1000k rpm up EFI= smooth economic power over 6-7k rpm up to red line. non is bbest or worst both are used for racing and dailies etc
Mostly fuel injection is more reliable than a carb and that's about it really
@@joshsevens9611 Remember that dirtbikes may be the exact example where the carb is more reliable.
Never had an issue with older keihin style carb, could drive it in the summer just fine and when the winter came with snow and negative Celsius temps, I just went with bit richer mainjet and adjusted idle.
A very informative and educational video dude, done in an easy to understand manner! Well done! đ»đ€đ
Iâve been running lectron on a 16 ktm300. It is amazing how awesome it works. I do like the easy adjustability the SC2 provides. Once $ does permit I will try one out. Thanks for the great video.
Appears to be a good solution for many who aren't into cleaning or tuning the average carb for their motorcycle. Thanks.
Yea, a dumb carb
Your videos are excellent. Very professional. Nice job !!
The PWK is a great carb, I have a worked KTM 380, I had to bore the carb out to 39.5mm from the stock 38mm so I could jet it. I like having 6 adjustment points with the PWK, it took some messing about, a number of different needle tapers etc but the bike is now crisp everywhere over the throttle range.
I thought the 380 had a 39mm
I thought the 380 had a 39mm
Brilliant! An innovation as simple as the carburetor itself! The moment I saw it I under stood it, the complexity lies in the profile of the metering rod, which disappears as well once the maths are worked out.
i bet you dont understand it at all ;)
Thank you for your video, I had never heard of this device before and found it very interesting (as a former motorcycle mechanic).
It's good to see that companies are investing in developments that benefit the rider, their motorcycle and are less polluting whilst giving greater fuel range and power.
Carful reading all these paid comments
@@laska907 The only 'paid' aspect in my post is that I paid attention whilst writing it!
Please post any actual evidence that you have to support your allegations.
Great Video,Content,and Detail.Had someone ask me about these and I hadn't researched it till now.Your YZ sounds alot more Midrange Torquey to me than Most, Carb? đđ
Kudos! really good info AND Great vido editing!
Thanks for taking us along on your journey. Good trouble shooting and wise to seek advice like you did. đȘđ
The British SU carburettor uses a metering needle that can be tuned by choosing a different taper or filing a flat on part of the needle. SU has a butterfly valve and constant velocity slide. David Vizard gas flowed the 1.25â to flow the same as 1.5â. There are some tips but it worked very well indeed.
Biggest issue for altitude is the relatively narrow range of mixture adjustment for any particular needle. Saying that you can use an old style choke control to raise and lower the main jet. Set it half way for low altitude, full high for high altitude or full low for cold start.
Most slide carbs can be adjusted by changing the needle. For example Dellorto list loads of different needles for their carbs. Pain and expensive to keep buying and swapping them - there are ~100 choices just for the K type needle and they are ~ÂŁ12 each.
@@katywalker8322 My life right now :p
Man, I do not even have bike, yet wached full movie and enjoyed as F..đ cool stuff this smart carb. And well made movie
I have same carb on my bike ride one time has lots more power then my mukuni had. Runs great at 3 to 5 clicks leaner. Still trying to get mine to idle as well. Revs great sounds great so smooth very good improvements over stock carbs đ
Nice! It's about time they've taken a step in a different direction besides the plain Jane same old carburetor and changed the internals more than just the shape of the damn slides! It's about time and long overdue especially for the same fact you bring in up in the video, "the whole ripping a carb apart to tune it" part! Nothing's more frustrating than losing your E clip for the needle in dirt or grass! Can't say how many times it's happened before, but more than I'd like to think about! That's absolutely awesome stuff! Dial tuning just like an adjustable jet use to be. I have a personal problem with fixed jet sizes and have always wondered why? Outside it makes them tamper proof I guess and once it's set up with the right size it's good. VERY very annoying Stuff when you made engine or altitude changes and need more or less fuel! Wow really outside of fuel injection BS, which is OK, you just do not make the same power nor have the same throttle response with FI as opposed to a carb, sorry I've had plenty of experience with both and hands down a carb on the same exact engine will produce a few more HP and the throttle response is instantaneous due to the fact a sensor needs to send a computer the input signals, thus calculate how it needs to be changed, then sent back to the injector and or butterfly valve if it's fly by wire, this all in reality takes nano second's I'm sure to all do? BUT it is a noticeable difference and the dynos don't lie either about fuel injection VS carbs the HP is always a little better on the carbed engine's no matter what it is, doesn't really make sense how a crude mixing valve is capable of creating more power over a computer controlled system??? BUT it's known fact in the engine world, but it's what you gain in ease or startup running and self adjustments, I guess you pay for in a few HP, which really isn't a bad swap....... Very cool Bro, thanks for making this video, never heard of these until now thanks to you, will definitely be checking into one now!
Thanks for sharing this. I didn't know that it existed. I like that it doesn't have needles, but I wouldn't consider adding it to my fuel injection street bike (if it was possible). I see it much more useful for your type of situation.
The Sonex aircraft I flew for 18 years had an aerocarb they sold that I installed and it worked the same as this carb. I loved it because I could adjust the mixture to go lean of peak at high altitude.
Yeah that's what I'm looking for I want to upgrade a simple updraft carburetor something better on a corvair conversion engine.
Very accurate vid! I had similar experience, right down to the procrastination.
Great upload as always! Repack your silencer, do a video on it while your at it. Mikuni/Keihin use JIS screws, much better than Phillips type.
And that is why those screws are stripped. Somebody used a Philips screwdriver on it.
Good video, there's more info in your video than on the Smart Carb's own channel.
Still waiting for a dyno run and some actual numbers from them after 18 months.
In Australia, the cost of the SC2 would buy engine upgrades and a tune.
Can't wait to go efi 2 stroke on my own bike đ
Good comment ! Buy a book tune your stock Carb Save Money !!!
@@marvinwaldo32
My Keihin runs really well was about $50 worth of jets.
That said, I don't ride variable altitudes or conditions much so I can leave my settings along mostly.
The SC2 is attractive for people who want to just leave it alone and ride, and also has the benifit of being able to to lie the bike down without draining fuel everywhere.
The Smart Carb is just too expensive in Australia to be an option.
Really just want an EFI Sherco đđ
It's funny you'd mention the lack of a dyno run on their website. They had a pissing match with Keith Peterson on a previous thread started by DoctorMotorcycle and asked him to post his dyno runs. Neither has put up anything but I'd think that after 11 months something would have been posted on SC's website. If they have already done it then I missed it. Until I see overwhelming proof of the SC's performance vs stock then I'll stick the the Keihin PWK on my '23 YZ125X and save my money for a JD jet kit, plugs, and enough fuel to learn how to properly jet the dang thing myself.
very cool vid, in my shifter kart road racing days, i did use the needle alot when tuning, i like this design
It's a detailed đ examination practically without any compromise. Well done for informative education.
Thanks for sharing (Also, there is a difference between Phillips and JIS screws. dot on the head means Japanese Industry Standard or something like it. Its a good upgrade to the workshop to get a set of JIS screwdrivers))
Nobody cares dude
@@ekimandersom4478 People that strip the screws on their carb care, "dude"
Having worked with carburetors for 40+ years, I found the SC2 concept to be very interesting. However the only feature that would be beneficial to myself would be the ability to easily adjust for altitude. On a single cylinder, single carb engine, the rest of the tuning is so easily done that it wouldn't be of any real benefit, regarding getting a base setting. When I'm working on a bank of 4 carburetors, then I'm always wondering why there isn't a simpler way as the carburetors have to be removed and replaced several times over as the various circuits are tuned, although that's only really a chore when you have a none standard set up in terms of the engine modifications and different carburetors, so you do not have a stock factory setting to work from. If you are racing then I guess the real crunch is whether the design really gives you all that extra power over a properly tuned stock carburetor, many 2 stokes are setup from the factory to run somewhat rich for engine longevity, rather than all out power and fuel efficiency.
So you just explained it yourself that, this product Is beneficial on 99% of the platforms its swapped into! Outside of whatever circles your forming, this is beneficial!
Who is out here fully constructing a motor from scratch, and does so without doing any prior research to atleast have a basis or point to start from? Come on man, quit bashing! Also, please explain wtf you said in your comment? (Pls don't take my cursing or short temperament as aggression or hate etc directed at you personally)
@@haydenroyer When I see some back to back dyno tests with a properly tuned stock carb, vs the SC2 I'll be happy to accept the results, but for now I find it really hard to believe the SC2 can provide drastically better results for anyone, beyond someone whose original carb is either having issues or was never tuned correctly, you can't change the laws of physics. Q: "Who is out here fully constructing a motor from scratch, and does so without doing any prior research to at least have a basis or point to start from?" A: Anyone who has a custom engine setup, my 78 Kawasaki has a big bore kit with high compression pistons and 28mm carbs instead of 26mm from a later model. I bought it that way, the previous owner never had it running correctly. It proved the most challenging set up to tune perfectly, I've worked with so far, as there was no stock starting point and the PO had got it jetted all over the place.
@@fiveowaf454 you're right - you can't change the laws of physics. It's the symphony of the spheres so to speak. But you can work with physics better and in a fuel system like this it comes down to fine control of both air and fuel metering, mixing that air and fuel as homogeneously as possible, all while atomizing that fuel to as fine a degree as possible (increasing surface area and therefore maximizing combustion efficiency) through the entire throttle range. The SmartCarb does just that with its metering rod handling fueling through the entire range without jets or power jets providing sub-optimal atomization.
The dyno charts are available on SmartCarb's social media channels and soon more of their website blog posts now that they've acquired an in-house dyno. Stay tuned.
@@fiveowaf454 I'm with you on this. I spent years working on modified motors and either swapping to larger carbs or learning how to modify stock carbs to perform 'properly' with modified engines. The 'Cafe Racer' fad of 10~12 years ago still gives me a bit of work as many people want to ditch stock air-box for 'the look' (although only one or two a year now instead of one or two a week)
Whatever, the 'advances' over a Lectron seems to be a low speed circuit which the Lectron always needed for anything other than drag strip use
@@nathandyess5310 I still can't help think that companies like Mikuni and Keihin have ample experience, resources and development time in their products, that they are not leaving loads of horsepower or efficiency on the table for someone else to suddenly find. As I've said I'll believe it when I see hard data that shows me the SC2 can outperform a properly set up "traditional" carburetor.
one of the great tuners descibed carburation as a controlled fuel leak
i have a delloto 40mm pumper on my racing norton with an adjustable main jet a needle moving in and out of an oversized main jet via a threaded drain nut with a gland rotated by an old rev counter cable alongside the tank
a long hill is needed turn the knob with wot till the motor comes on song then close the throttle a wee bit if the motor momertarily speeds up
its weak so another half turn or so and its bang on
then its needle /slde/pilot / cut away for the rest of the range
binks made some fantastic carbs
in the 20s notable the Rat trap
with d shaped port and long reed type throttle plate full bore or nothing
Excellent very informative vid, i had never heard of smartcarbs before now so thanks :-)
Holley came out with a carb for Harleys using this exact concept, flat sided needle and all. They called it QuikSilver. I have one on my shelf of shame along with a bunch of other carbs. In the beginning, after getting it tuned in, it seemed to be a very good carb. The main problem was that after a year or so of running it became almost impossible to keep running right due to internal wear in the carb body and slide, and in the needle bore. Replaced it with an S&S Super E and the bike has been running perfectly for over a decade. I don't think they lasted long on the market. Of course, this is a new manufacturer, and maybe they've overcome the wear issues.
Edelbrock, not Holley, QwikSilver, not QuikSilver, and by directive and inspiration of original metering rod carburetor concept inventor William Edmonston, the culmination of his efforts being the SmartCarb. Our SC2 models are all CNC billet aircraft aluminum construction with hard anodized billet throttle slides. Much more durable.
@@SmartCarbFuelSystems Ok, I stand corrected, I got the company and trademark name spelling wrong, so sue me, LOL. I was just trying to provide some background on the tech that is being touted here as somehow new. What exactly is different between your carb and Lectron or XTNG carbs? I'm relatively sure that all of Edmonston's patents have expired by now. Probably also those assigned to, I'm assuming, his son Micheal. OH, BTW, one of the other carbs on my shelf of shame is an original Edvac carb. Designed by Edmonston for aircraft use, with no float bowl. The fuel passage to the needle bore goes directly from the inlet to the bore, through a tapered needle valve controlled by a cable from the instrument panel. Supposedly the idea was to control mixture at various altitudes with the needle valve to maintain stoich by watching EGT readings. I tried to run it on a Bonneville race bike my manually adjusting based on AFR readings. Didn't work too well for me in the long run, but ran like heck right before I locked it up, LOL.
@@edbennett8257 no problem, we're happy to keep the story straight. Some of the tech in use with the SmartCarb was developed in prior metering rod carburetor iterations including the QwikSilver and the even earlier Lectron, and some of the tech in use is new and patented by us. The main differences between the SmartCarb and the Lectron and XTNG (Lectron clone) are the SmartCarb's internal, integrated float bowl venting feature (patented), the use of a single circuit (metering rod) to cover the entire throttle range with no power jet or other circuits required, the variable throttle rate venturi shape (the process by which that shape is defined being patented), full external adjustability without tools, and a TPS option. Both Lectron's new Billetron 38 and the 38mm XTNG are 4mm smaller than implied or advertised at 34mm whereas SmartCarbs are true to size if not slightly over. Check out the SmartCarb vs Lectron article on our website for more information.
Very curious about the Edvac. We're pulling together a collection of all earlier Edmonston designed/inspired carburetors starting with the Posa-Fuel and are willing to pay well for clean examples. Reach out if that may be of interest to you.
@@SmartCarbFuelSystems I'm in Kansas City. I could bring it to your Raytown location some day if you'd like to check it out. I also have an EI carb, another iteration of the same concept by Edmonston.
Yes , I recall that Harley Davidson did come out with a carb of this concept
3:27 fuel filter wrong orientation)))
4:03 - this right)))
I am going to ask them about 4-stroke applications. Great video!
Another good video!
What are the other applications I might use an SC2 on? I am thinking about 8 of them on top of a modified Chevrolet V-8 intake manifoldâŠlike the old school 8 Webber One barrels of legendđ€đșđžđłđđ€đ»! As well as vintage retro mod street bikesâŠ
This type of carb has been around since the early 70's (rod vs needle)
BUT they were VERY expensive and almost impossible to tune because a complete stripdown was needed to make any sort of adjustment.
I'm glad to see that someone has made it a lot more user friendly because the old type performed extremely well once you had gotten the setup dialed in but the difficulties simply made it a non-starter.
1967 actually with the Posa-Fuel. After that there was the Lake Injector, Lectron, Ei Blue Magnum, the QwikSilvers, and ultimately the SmartCarb which offers all of the performance benefits of metering rod fueling with super easy external adjustability.
@@SmartCarbFuelSystems think Ron Gardner of Gardner Carbs came out with it before 1967, i have a lot of his prototypes from the late 1950's sat around.
Dood. He did it.. he uploaded again.. he made me happiness. Still waiting on a bean related video but anything at all is great.
oh hell yeah...with the lectron you have to pull the metering rod out. use the special tool to spin it. then put it all back together and ride.. but with this one. you just reach down and twist that screw!! SWEET!
Great vid!
That's a crazy price tag to upgrade. I will say the technology is cool, and I'd run it. But not for that much, and they limited to two stroke bikes. They'd have a lot of opportunities to make money on 4 strokes, and ATVs if they got in to it I think. especially people with older warriors and stuff that they no longer produce oem parts for. The aftermarket just isn't as good.
i was thinking the same thing, id love to upgrade my 4 stroke, but not for $600
@@kidsalex13 there is other aftermarket smart carb options I have found. Pricey still.
This technology would be amazing for the adventure segment, going across a variety of altitudes without wanting to change carb jetting. I was on their website, just about to buy one, when I realized they only make them for motocross 2-strokes. What a bummer. It doesn't even make sense when motocross bikes won't even be used at high altitudes.
@@theyeetus1428 I do think there is some other companies that make them for different machines.
@@Theupstateidiots Do you recall the names of those companies?
I think you missed the biggest problem, they are expensive, would love to try one out since I ride summer as winter up in sweden and need to rejet my carb 2 times a year, but for me the sc2 cost twice the price of my bike ;)
it's easily the most important part of a motorcycle drivetrain
I had a yz 490 air cooled two stroke in the 90s it was an 84, and it was a monster.
Can it work with a multi-carb setup? If yes, how do you synch it/them?
I think this design could be adapted to an automotive application. If I was a designer, Iâd start with something like a 2 barrel or 4 barrel design usually seen in a classic American car, since theyâre so common.
They've done this for ages.
on a car you go EFI if you want power
I had a edelbrock carb that functioned the same. Metering rod and a red screw on top.
Yep, the Edelbrock QwikSilvers were predecessors to the SmartCarb and they saw the introduction of the clicker on top. Different function though in some key ways. SmartCarbs internally vent their float bowls and utilize a non-round, variable throttle rate venturi profile, among other differences. There's a long history behind the metering rod carburetor concept.
You should have mention the throttle body design, as the conventional flap/butterfly design doesn't provide a linear curve of intake air (air being swallowed by the engine), it is more like a quadratic one, which you remove almost the whole air restriction at less than 90 degrees opening. This new design provides an exact intake area (because it is like a slider gate), so at 100% opening throttle body, you'll have 100% of the area available to suck air. Not that i have one or even tested it, but just by how it looks, it seems to me that provides an exact AFR the whole time, after a proper calibration of course.
awesome unbiased review
Just as much tinkering as a normal carb đ€Łđ good to know tho, instead of just saying everything perfect on my bike and then telling everyone to buy one đđ cheers bro đłđżđłđżđłđż
Having dealt with lectron and smart carb in person I will say although when they work right they are great but when they donât work just right which is 3 times out of 5 they far underperform compared to say a stock kehin. If your looking for the best 2 stroke carb setup I highly suggest a stock kehin with a STIC metering block.
Yes STIC is what you need IF power you want . Best carb mod i have done ..
@@laspar3462 I have a yz125 with the stock mikuni tmx38, would it be worth the switch?
â@@aaroncrain2343 air striker, lectron or smart carb are going to be massive game changers. The air striker is a great carb when tuned even without STIC, but that's a very expensive addition to the $300 you'll throw at an air striker. People tend to leave out the fact the STIC is close to $400. So you're sitting at a very specific $700 system. I can assure you and 99% of the people who watch this video that you're not getting the most out of a STIC system. I have not gotten my hands on a smart carb, YET. But a lectron in my 1998 cr250 cleaned up the entire powerband and the fuel economy is PHENOMENAL. My lectron experience has been wonderful and my c250 is a full blown woods bike and I tuned it to have a flat power curve. So for around $350 you can have a great Air Striker with a jetting kit or for another $300-400 you can get a lectron or smart carb (or stic). If you're lucky you can even find lectrons (as long as they're compatible.) for a little under $400 used which is what I did. Took some time to tune, but got dialed in.
Kehin is really bad. If you don't believe me what did Harley Davidson choose for a carb. Mekuni smooth bores are everyones choice for street or racing.
@@genefoster8601 you must not ride dirt then cause every Mikuni Iâve had specifically the carb off my brothers 02 CR250R are way to picky I think just about every dirt rider will tell you the kehin is superior
Havenât tried it yet but it looks like a game changer gonna try it âđœthanks
Question 4U . Is this Carburettor 4 2 strokes only. Can it be mounted on a Motto Guzzi Monza V50 .
Thx 4 Sharing .
I think Normal carb is the best for me.. prices cheap,easy to tune..i've been using Keihin 30mm(Yamaha tzm 150 carb) on my Suzuki Txr150 for more than 1 year without changing the jets and no problem till nowđ
Malaysian? đ€Ł Just stfu and watch how this new tech working. Ok?
Normal carb wasn't best for me until I saw the price on this thing... yeah, normal carb is best for me. I'm good.
When they make advertisment look like a review đ Atleast smartcarb finally understod that they need to pay off a few youtubers to keep up with Lectron.
Great job on video đ
Looking at the spark plug will tell you if you have the proper mixture. This is very important on high performance 2 strokes because running to lean makes them blow up quickly.
I'm curious if this would work for 4 stroke engines as well, or is it possible to make a rack of them for an inline 4 bike. And what about boosted applications?
Yes, definitely possible! I just used one for the 2-stroke since thatâs the bike I have. Works with turbos too. Incredible carb!
Same question I have, I highly suggest to go to the SmartCarb website (link in description of of this video), leave your contact info (email), and they should email you back with details.
Hopefully if enough people inquire about it:
1. We'll find out that the SC2 can be rigged up to a 4-Stroke road going bike, OR
2. They'll see that there's a community out there wanting this for street motorcycles and make an SC3 or such.
@@MrCODEmaster00 we'll keep an eye out for your email inquiry and get back to you as soon as we can. Our focus has primarily been on the 2-stroke market as that is our riding passion, but we do recognize the needs elsewhere and are growing to serve them. We have equipped 4-stroke bikes with excellent results for years, provided they will fit with a single, top-pull throttle cable. And as for boosted applications, well, we did just play a part in securing 5 new Bonneville Speed Records in July on a turbocharged YZ125/144 in an R6 chassis.
Cheers!
@@SmartCarbFuelSystems Thank you for the response, may I ask for directions to see if/what SC2 carb will fit a stock-engine CMX250 (Honda Rebel 250cc, 2005 Year)?
Only thing I found was the tool to see what 2-Strokes it's compatible with, do you have a similar thing for 4-Strokes to find out what specific model/size of carb I'd need?
700+ dollars for one...it will cost about the price of a new engine...
And adjusting 4 carbs is just a pain...
i'm so sick of phillis screws, i'm sold.
I really like changing maps using my laptop/phone as I do for a few years now with our KTM's... Laptop for the original ECU's and WiGET app for the GET ECU's.
Excellents video!you owned an subscriberâ€
The smartcarb looks really nice and clean. Imagine having it in a CR 500 :D
I have a lectron on my cr500 and it is night and day from the original carb. There have been a few guys that have tried running the first smartcarb with no luck on the cr500s but haven't heard of anyone trying one of these yet.
@@davidwagner2280 oh interesting
You donât have to imagine it. Weâve equipped hundreds of them with the new SC2 model SmartCarb. We recommend the 38mm size. And like the YZ here a trim inside the airboot is required for proper function.
@@SmartCarbFuelSystems Nice :o
Im picturing it on my 85 ATC250R...hmmmm....
Edelbrock had these years ago called a quicksilver...kind of a pain..
Tons of different rods,and real time tuning was a nightmare.
Exact same setup
Nope, not the same. The missing link was internal, integrated float bowl venting, a patented feature of the SmartCarb. It communicates the same air density into the float bowl that the venturi sees (not external vent lines in front of the rear wheel) along with velocity of that airflow, proportionally, to drive fuel flow both ways. Progress. By the way the QwickSilvers were direct predecessors to the SmartCarb. Same inventor. Just needed time to learn and improve.
I have two Xr650râs both equipped with quick silvers. Once the right metering rod is installed the carbs have not been touched in 4 years. A brilliant carb with a simple design and a pumper to boot. Iâll keep what I have, thanks anyways.
@@chuckfry1227 happy riding!
Very concise overview. You're doing well to sell me a Smartcarb with no BS! Love the production value and editing on your videos.
Excellent video !
Canât recommend the SC2 enough , the best upgrade you can do for any bike without digging in to do port work . Makes my yz125x so much more reliable and user friendly, not having to mess with jets etc. Also, itâs very very hard to clog this bad boy if your bike sits.
So it's basically a SU carb for a motorbike
Thats not a bad thing, I did a draw though turbo setup with a SU carb and it worked brilliantly
Those style carbs are fantastic
Its NOT an SU carb, the slide on this carb is controlled by the rider, on an SU carb the slide is controlled by the vacuum created by the engine. Furthermore the needle in an SU carb is like the needle in most other carbs, it has a round cross section, the Smart carb's needle is not even called a needle as it is not round, hence the term metering rod.
Comparing to keihin fcr downforce which ones better? And what are size available , I've got yamaha 250cc does proper to intake mounting and through to the header hole of.
Ease of use vs cost is always a big thing especially if your not inclined to learn how to tune/fix your own bike/cars.
I have always wanted to try one but can't justify the cost at $1500nzd when i can barely feed myself, i will stick to changing jets and having a cry (although knowing how to read spark plugs and a lambda sensor are handy)
Thanks for upload :)
$1500 is a lot of coin. But you can always take it off once you sell the bike
But can it work on a old carb motorcycle with no electronics or anything smart like throttle position sensor
I sent a message to SmartCarb's contact email wondering the same thing, I have a 2005 Honda Rebel 250cc, and I'd *LOVE* to:
1. Replace a carb that I have no clue how to tune/repair if need be.
2. Get a better carb than what I have now.
3. Make it even more fuel-efficient just as a happy accident.
@@MrCODEmaster00 let us know
You can get the carb with or without a throttle position sensor.
So it was foreshadowing indeed
I want four for my Nissan truck now. Best yt video this year. Probably.
About 10 yeats ago, I bought a 2002 KTM 520 exc, from the original owner.
He was/is definately a tinkerer.
He was a Canadian guy, who had relocated to SoCal.
He was also, big into snowmobiles.
The 520 was pristine!
He had added a device, known as a dial-a-jet to it.
Apparently this is a common mod to snowmobiles.????
I had no prior knowledge of it.
He had it all set up, and gave me the manual for the dial-a-jet.
After reading, and understanding the unit, I just rode the bike and still do...a lot.
Even in very low temperatures, I never have to use the choke!
Even first thing in the morning!
I have ridden the bike at aea level, or below, and at 9000' elevation.
1 or 2 "clicks" on the dial-a-jet adjuster is all it takes.
Incredible!
Has anyone else had experience with these?
This sounded like a good idea untill I looked it up on the web. When a fuel injection kit for my engine costs almost $400 USD less, this makes no sense whatsoever. I just don't see an advantage here. And I do know about jetting, so.....
Is it only for dirtbikes?
Would be awesome on my aprilia rs 125 :D
I went to the SmartCarb website (link to it is in the description of this video) and left my contact info wondering the same thing but for a different bike.
I highly suggest to leave your contact info too so they can e-mail you as well, hopefully if they get enough people wanting it for 4-Strokes/Road-bikes they might make something if the SC2 can't.
your RS has fuel injection
@@2strokerides I've gotten the RS 125 2t now, i sold my 4 Strokeđ
@@MrCODEmaster00 alright, im gonna do the same thenđ
@@Subliminal3117 my bad than :)
Im retired bike mech and prefer carbs way above fuel injection . Simpler, cheaper , way easier to fix and more reliable and above all it gives you full performance. No need for mappings and that sort of crap. Once jetted and tuned correctly it remains tuned. Bottom line , I'll choose carbs 10 times out or 10.
How useful would this carb be for an old SandriGarden grass trimmer?
Can it fit on a 4 stroke street bike tho?
Same question I have, I highly suggest to go to the SmartCarb website (link in description of of this video), leave your contact info (email), and they should email you back with details.
Hopefully if enough people inquire about it:
1. We'll find out that the SC2 can be rigged up to a 4-Stroke road going bike, OR
2. They'll see that there's a community out there wanting this for street motorcycles and make an SC3 or such.
Imagine adding individual circuits so you can tune each one independently... "no jets" is just a word play. Jetting refers to fueling - and the other carbs using no jets also requiring fueling adjustments.
Imagine not having multiple circuits that need independently adjusted... or a carburetor that drives fuel flow proportional to air density from inside of the airbox instead of in front of the rear tire, one that also drives fuel flow proportional to that airflow's velocity right at the manifold. Those features preclude the need for multiple circuits and largely define what a SmartCarb is.
Every carb requires adjustments. There's too many variables affecting it from engine health changing over time, modifications, fuel selection, rider preference for different riding conditions, etc. The difference is that these carbs greatly mitigate the adjustment requirement for air density changes. A carb that's dialed is a carb performing at its best. Conventional carbs with jets, and we all know what we mean when we say "no jets," do not stay dialed for even moderate changes in air density, changes that take them out of optimum tune.
Furthermore, SmartCarb adjustments, if even required, are made externally, by hand, without tools, in seconds.
@@SmartCarbFuelSystems still wating on my 10-15 percent power and improved bsfc
đżđ
cool carb and video thanks for sharing subscribed
Hi I am just wondering do you think that the smartcarb SC2 can fit on a Honda XLR 250R special?
wow, you can buy a used bike for the price of that... I was thinking around $250 usd, but its in the $700+ range.... At $250 usd it would be reasonable.
I'm wondering if they do smart carbs for cruisers. I'm always looking for a way to get better gas mileage. An helping the environment even if just a little is a good thing in my book
Absolutely! Check out their website
I have seen comments like this a lot, please go to the SmartCarb website (top link in the video description) and scroll down, leave your email contact info and letting them know you're curious if the SC2 _could_ be fitted to a street motorcycle that's 4-Stroke and we'll either:
1. Find out if it's possible to rig it to a 4-Stroke road going motorcycle *OR*
2. Hopefully they'll make an "SC3" or such for this purpose.
@@ChaosCauses I love that you reply to comments, but I must ask. Where do you see it for street bikes? I go to their website, and click on "Shop", and only thing there is 2-Strokes.
If they do have them for 4-Stroke road-going motorcycles they have done an impressive job at making it hard to find.
Edit: thank you for any response you have to this.
Good video. Cool carb. My bike has 6, so I would love to have 6 of those bad boys. they look great.
Hhawu! Mfwethu. Ilana eMzansi?? Ur channel and presentation is so international...I thought ur like a Texan with his own track in the backyard, just speaking like a Dutch Austrian. Great bro, all the best
It's a lazy man's electron carburetor with all the fun taken out of it of manually adjusting that tapered needle one notch at a time and then when running out of notches you grab into your drawer of a thousand other needles of different tapers and start all over again but you guys have taken all the fun out of it I say by merely pushing a button what fun is that âïž it will only lead to more time on your hands to turn the throttle and wear out your engine completely wfo throwing roost at your buddies pissing them off to the point you will have no friends... As you will be riding while they are still at home changing Jets
Okay Okay I'm half way through the video and I already see the genius simplicity in this carburetor. I love it!!! *EDIT* alright I made it all the way through the video. Finally I find someone that see the low fuel consumption rate to be more environmentally friendly! Thank you!
Cool video very interesting carb, When are you going to do a ride in cape town or up mt kilimanjaro? Realy put it to the altitude temp test and make an epic video of it :)