38mm Cast SmartCarb


In stock

(3 customer reviews)

SmartCarb model 38CAC is designed to replace conventional carburetors in 2-stroke applications from 125cc up to 500cc or more. It is a direct fit in applications originally equipped with Keihin PE, PJ, PWK and Mikuni VM and TM series carburetors of similar sizes.

Questions about sizing, fitment, or compatibility? Contact Us!

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: This product fits the new 2017/2018/2019 KTM and Husqvarna bikes with $25 factory modification add-on. Shorter OEM Intake Flange required for 2017/2018 SX, XC, TX, and TC model 250 and 300cc bikes. Available here.

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SKU: 38CAC Category:


NEW for 2019:

  • 2017/2018/2019 KTM/Husqvarna compatible. Accepts the stock throttle cable. OEM 2017/2018 KTM/Husqvarna 250/300 XC-W/EXC/TE Intake Flange & Gasket required for proper 38mm Cast SmartCarb fitment in all 2017 and 2018 SX, XC, TX, and TC model 250 and 300cc bikes
  • Fully machined billet aluminum slides and forks for more precise tolerances, consistency, and performance
  • Improved float geometry for more positive and responsive float level management
  • High-flow, Viton needle & seat and check valve inserts now standard on all units

The SmartCarb embodies numerous TEC-perfected design features that provide extremely fine fuel atomization, precise air/fuel mixture control and ambient air density compensation. All of these innovative features are delivered in a single-circuit, flat-slide, variable venturi, jet-less carburetor.

Cast in high grade aluminum, our 38mm Cast SmartCarbs are crafted to the same specifications as their Billet counterparts to delivery the same excellent performance gains that our customers have come to expect from SmartCarb technology.  SmartCarbs require no jetting and mixture and idle adjustments can be made simply and easily via the external Idle Set Screw on the side and the mixture Clicker on top.

3 reviews for 38mm Cast SmartCarb

  1. wfopete

    Personally I believe a lot of riders do not know what a properly jetted bike runs like and surely don’t want to spend hours “getting to that point.” Nor can they identify a jetting problem from an ignition, fuel, PV or some other problem with the bike. I would put up with jetting that is a little off rather than “constantly fussing with it.” Yes, I change it seasonally but after that I just put up with it and ride. I bought a SmartCarb because I wanted good jetting and consistency. With the SC I can set it, forget it, and just ride; it doesn’t matter if it’s 40 degrees or 85 degrees out or if I’m at sea level or 8000′. Here’s another plus of these SmartCarbs, they are useful as a diagnostic tool, so if your bike isn’t running correctly you can pretty much eliminate “jetting” as the culprit.

    Pete Petrick

    SmartCarb Fan

  2. RBMyers (verified owner)

    I wanted to take a minute and tell how happy I am with my purchase!

    I have a 1982 Husqvarna 430 that has been awesome to stare at but a nightmare to start. It usually takes me 20-25 kicks to get it going. Due to some surgery I had to have, my bike has been sitting for about 6 months. I just installed my Smart Carb following the instructions that you sent and the bike started on the 4th kick! It’s rare these days for a product to perform as advertised but you guys NAILED IT! I haven’t even had to make an adjustment!

    Thanks for saving me from selling my bike!
    – Rob

  3. Geoffrey B

    I reached out to Corey and Nathan after discovering their technology on a forum for the 17-18 KTM Mikuni Carb issues. Being a competitor, I could no longer afford to question how the bike was going to respond to a new venue, higher or lower elevations, or changes in ambient temperature.

    I was able to fit the 38mm Cast SmartCarb directly to the bike with only minimal modification which they supplied and it was pretty well tuned right out of the box, only a few small tweaks to idle and the metering rod before we were off to the races. The bike was a totally different animal!

    Technology Elevated’s SmartCarb blew me away at how well it performed. No more guess work, no more hesitation, no more second guessing how the bike will respond to the inputs I provide.

    Thank you Corey, Nathan, and team for designing such a high quality product that is leagues above the rest. I cannot say enough good things about the design and am excited to continue racing with the product!

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