28mm SC1 SmartCarb


Out of stock

(3 customer reviews)

Currently Out of Stock

28mm SmartCarbs are designed to replace conventional spigot mount top-pull carburetors in 2-stroke applications and will fit most intake manifolds and conventional air boxes that use Keihin PWK 28mm or Mikuni VM 24mm and 26mm carburetors.

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

Every SmartCarb is pre-configured with baseline settings specific to the application for which it is ordered.

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: The 50.8mm (2 Inch) Big Bell option (dimension D) must be selected for proper fitment on the following applications:

  • Mini Motocross Bikes (Note: applications that came with the Mikuni VM24 or VM26 stock do not need the Big Bell option)
  • KTM Freerides
  • Trials Bikes
  • Generally any application using a 25 or 28mm PWK carburetor stock
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SKU: 28BAC Category:


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

3 reviews for 28mm SC1 SmartCarb

  1. max.aigner

    I got this SmartCarb to replace the stock Keihin on my KTM Freeride 250R. I ordered it over the phone and it was good to hear that TEC know my bike and what metering rod to use, to get the adapter ring and to cut a little plastic piece that’s not needed anymore.
    Shipping was quick and installation was straightforward. The carb is nicely machined and feels like quality. TEC had already set the metering rod and idle for my application and it was spot on so the bike fired right up. For tuning, make sure to follow the procedure in the manual (play with clicks first and adjust idle last). I played with it for a while but eventually ended up with the same settings the carb came with.
    Fueling is spot on throughout the throttle range and very reliable. I ride from sea level to 7500ft and hot to freezing, damp to dry and so far haven’t had to make any carb adjustments. I think I gained a bit more power and better mileage but that’s hard to tell for sure — it definitely didn’t get worse. I noticed that “luggability” got even better and power delivery feels smoother.
    With the Keihin I frequently had the engine cut out on me during steep hill climbs (worst possible moment) even after adjusting the float height. Problem is gone with the SmartCarb.
    Other things I appreciate: The carb is not spilling fuel when the bike is laid over and there’s no overflow/vent hoses that could get clogged or pinched or suck in water which was an ongoing issue with the stock carb. Also, the choke is on the left side of the carb and much easier to reach ūüôā

  2. myersbldrs (verified owner)

    If you own a KTM Freeride 250 you need the SmartCarb. – No more annoying low speed stutter, instant starting, more bottom end grunt and smooth top end. Better fuel economy is also an added bonus. Fitting couldn’t be easier as it is a direct replacement to the standard carb. The team at Technology Elevated are extremely helpful and if you have any questions you can contact them by phone, or email and they are quick to respond.
    Well worth the money!

    Dave Myers
    Sheffield, England

  3. Dale Malasek

    For the last several years I have worked closely with the developer of the SmartCarb, Corey Dyess, to bring SmartCarb technology to GasGas Trials Bikes and I can now say that we have nailed it! I have the first production 28mm Billet SmartCarb on my 300cc Factory Replica TXT Pro and it performs absolutely perfect. I’ve ridden from 980 ft (here in Kansas City) up to elevations as high as 11,600 ft in Colorado with no adjustments necessary other than an idle screw tweak here and there to my liking. What a relief to never have to change jetting anymore for the altitude you’re riding at! The carb is very easy to set and can be adjusted without any tools or hassle by using the mixture clicker adjuster on top of the carb and once it’s dialed in, you forget it. The SmartCarb adds noticeable power from idle all the way up to the rev limit of the engine while giving very fine throttle control. You will experience a smooth and controllable power increase throughout the RPM range and I’ve seen my fuel economy increase too, which is also a big bonus! The SmartCarb improves every operational aspect of my bike and at this point, I’d be hard pressed to ride without it.

    – Dale Malasek, Trials Importer
    GAS GAS USA, Inc. & Mecatecno

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