38mm SC2 SmartCarb


(2 customer reviews)

36, 38, and 40mm SC2 SmartCarbs are designed to replace conventional carburetors in 2-stroke applications from 125cc up to 500cc or more. They are a direct fit in applications originally equipped with Keihin PE, PJ, PWK and Mikuni VM and TM series carburetors of similar sizes.

Every SmartCarb is pre-configured with baseline settings specific to the application for which it is ordered. Questions about sizing, fitment, or compatibility? Contact Us!

New orders ship within 7-9 business days. International orders may be subject to shipping delays related to Covid19. Please contact us for expedited shipping quotations through alternative carriers. Any applicable import duties/taxes are the purchaser’s responsibility.

Performance Guarantees

  • Ride Faster (+10% Horsepower)
  • Ride Farther (+30% Fuel Economy)
  • Enjoy crisp, clean, linear throttle response bottom to top!

Tuning/Ease of Use

  • Easy External Adjustability (no tools required)
  • Ambient Air Density Compensation (no tuning required for elevation, temperature, or humidity)
  • Accepts all modern stock throttle cables
  • Single Circuit Design (no jets, no accelerator pump, no power-jet)
  • Set it and forget it!

Other Features

  • No fuel spillage (internally vented, sealed system)
  • Reduced emissions output (30-50% reduction)
  • TPS plug-and-play (optional add-on or as a kit)
  • Premium, durable construction
  • Designed and manufactured in the USA

NOTE: Throttle Position Sensor (TPS) recommended for:

  • Applications using 3D ignition systems requiring TPS input
  • Applications using TPS input for oil injection (Betas) or for servo controlled power valves
  • Applications using aftermarket ECUs with advanced mapping features requiring TPS input (PowerCDI)
Product total
Options total
Grand total
SKU: 38BAK Category:


New Generation

We’ve spent years refining every facet and feature of the SC2, making it the biggest leap forward for our flagship model since 2012. This new generation fuel system provides the same unmatched performance gains enjoyed by thousands of enthusiasts in over 80 countries worldwide, only now in the most accessible, plug-and-play format we’ve ever made.

  • Substantially shorter end-to-end (direct fit for all modern 2-stroke dirt bikes)
  • Revised throttle cable retention (works with stock throttle cables)
  • Internal vent passages (clean, slim form-factor)
  • TPS plug-and-play (optional)

SmartCarbs are designed and manufactured in the USA to provide extremely fine fuel atomization, precise air/fuel mixture control, and ambient air density compensation. These innovative features are delivered in a single-circuit, flat slide, variable venturi, mechanical fuel system.

Hewn from beautiful billet aluminum, the SC2 has been crafted to the tightest tolerances in order to deliver the excellent performance gains that our customers have come to expect from SmartCarb technology.

2 reviews for 38mm SC2 SmartCarb

  1. Matthew McGovern

    I read every forum online before purchasing a 38mm smartcarb for a 86 trx250r. The bike has 68mm piston, full air box, full fmf pipe. I live in New England and struggled with jetting on an original Keihein carb that was completely rebuilt. Between elevation changes where I ride spanning from 42′ above sea level to other riding areas 2000′ above sea level, the bike always ran like garbage. Humidity and temp changes are drastic here from one day to the next and the bike was becoming a hassle. I bought my smartcarb used, as I did not want to pay full price on something that I have never tried. After putting the carb on my bike, with no tuning once so ever (came off of a trx250r with full pipe and stock motor), the bike literally started first kick. I no longer had my low end bog. I had crisp throttle at all rpm when you whacked it. After several rides at 42′ on up to 2000′ on 90 degree days and 65 degree days, (and little tuning help from this company) the bike is snappy and crisp. I maybe spent 30 minutes setting carb to my liking then did plug chops. I would recommend this carb to anybody with a 2-stroke. Best part is, I contacted this company and spoke with Nathan who is a customer service rep. Even knowing I bought the carb second hand, he went out of his way to give me technical support for carb settings for my bike given my region and modifications. He did not care that I did not buy new, basically said he valued me as a customer of their product regardless of how I purchased ūüôā Customer service is absolutely awesome. The carb auto tunes itself for elevation and temp changes unlike the Lectron. The dial clicker is simple to use and you really do not have to mess with it at all once set for you bike. No more gas leaking out vent hoses either. Super impressed with this carb and the people that work here. They hundred percent stand behind their product. For people online that were not impressed on some of the forums, I feel they did not take the time to set it up properly for their application or did not contact these guys for support. Hell, I even sent my plug chops to them to read and they helped with that. I cannot say enough. Always been a 2-stroke guy as far as sleds and bikes go and did not think I would ever go to this style of carb, but after purchasing and seeing how this almost made my 2 smoker into a “fuel injected” bike, I will never go back to an ordinary carb. Very good product. Thank you again to Nathan for all the help setting mine up! Greatly appreciated the time and effort especially when I purchased second hand! How many other companies would have done that???? Not many!


  2. Justin A Sadeghian

    Could not be more pleased with the purchase. Have about 60 hours including an off road racing series and multiple track days.
    Have a YZ250 but have a 325 kit with a rekluse clutch so was concerned about how the carb would perform. The combo was phenomenal and is testament to how flexible the carb is. Pulls hard off the bottom and is linear all the way through the RPM range

    Install was very straightforward, flipped up the rear subframe and had no issues. Would recommend using your phone (or other camera to make sure the there is no obstruction from the air boot, I had to trim mine slightly. Bike literally started in 5 kicks with a new top end. My 2015 YZ250 has no clearance issues with the rear shock either, it initially makes the air box touch until you sit on the bike.

    Initial tuning was pretty close from Technology Elevated. I really appreciate the fact they listen to each customers specific application and send a tuned carb for your platform with baseline settings written on the manual. I’ve heard complaints about the carb not being capable of change but I’ve had mine from sea level to 5K (MSL) in varying temperature and humidity conditions and I cannot tell the difference between my friends FI bikes and the SmartCarb. Another thing I like compared to FI is you have the capability to adjust to your liking, if the bike is to rich or lean it’s literally a 5 second process to get where you want to be. Additionally I’ve had friends with electronic FI issues, which I never have to worry about.

    The off road races started from “dead engine” condition so I’m familiar with starting quickly and the bike fires first kick every time if I do my job. In 60 hours of riding I’ve never had a starting issue.

    Fuel economy is dramatically better. Have not done a mileage test but for reference I could run a 2 hour off road race on the stock YZ250 MX tank, which is incredible and couldn’t get anywhere close to that before.

    Bottom line, I won’t have a bike with a conventional carb from here on out, really pleased with the product.


Add a review

Your email address will not be published. Required fields are marked *

Go to Top