Current model SmartCarbs are designed to replace Keihin PE, PJ, PWK and Mikuni VM and TM series carburetors of similar sizes. Applications for which we have confirmed fitment and baseline settings for are selectable in the Get Equipped tool on the Shop page. If you don’t see your application in the Get Equipped tool and have questions about fitment, installation, or compatibility, please contact us.

SmartCarbs are currently offered with single cable, top-pull throttling in 26, 28, 36, 38, and 40mm sizes. More sizes will become available over time.

We are still in development of dual cable, side-pull throttled SmartCarbs for direct fitment into modern 4-stroke applications. The top-pull throttled SmartCarbs currently available may be used in 4-stroke applications, however we ask that you contact us for more specific information and help regarding potential fitment issues.

Looking to equip your scooter, junior dragster, shifter kart, paramotor, snowmobile, or something else? We are happy to work out the details with you. Please contact us directly so that we can advise you on SmartCarb sizing, installation, and tuning for your unique application.

Yes, throttle position sensing or TPS is an available add-on to any 36, 38, and 40mm size SC2 model SmartCarb. TPS is recommended for applications using 3D ignition mapping, Beta 2-stroke motorcycles with oil injection, and applications using aftermarket ECUs with advanced mapping features.

That depends on a few factors. Many owners choose to take their SmartCarbs from one application to another over time or when upgrading. Please contact us for assistance with compatibility, fitment, and tuning baselines for any application to which you wish to move your SmartCarb.

Both the SmartCarb and the Lectron share the same flat slide, metering rod carburetor concept and both were designed and inspired by the same inventor. The SmartCarb comprises a decades newer design that improves upon the shortfalls and limitations of earlier designs, including the Lectron. For more information on their shared history and how they compare, check out our SmartCarb vs Lectron article.

 

 

We recommend replacing size for size in most cases, though there are some notable exceptions. Some applications can work with multiple sizes depending on your performance goals. We are available to answer any sizing related questions you may have, please contact us with questions.

Our six (6) month warranty against manufacturing and workmanship defects applies to all SmartCarbs and kit components purchased new. For more information about our warranty policies and satisfaction guarantee, see the Orders & Returns page.

Yes, twice. It will set you up for success! View them online here.

SmartCarb installation is easy, however an airboot modification may be required for some applications. See our Installation Checklist for more information.

In most applications the SmartCarb is very easy to install and fine tune. Some applications present fitment considerations, however we notify you and walk you through anything that is required before or at the time of purchase. Contact us with questions about your particular application.

SmartCarbs are externally adjustable hand. No tools are required and adjustments take seconds.

Please contact us directly if you think you need a different metering rod. We are able to advise you on selection and baseline settings.

Yes, you can, however, there are a few things to consider. Contact us for more information.

We have no hard recommendations on oil selection or ratio to mix at, however, we may make suggestions. Using a high quality synthetic oil at a reasonable ratio for the given application is advised.

Depending on the nature of the modification we may suggest alternative settings or changing the metering rod in certain cases. Contact us for more advice specific to your needs.

SmartCarbs are built to last, however basic maintenance is required to keep them performing optimally. We recommend a thorough cleaning annually and the replacement of service parts as needed every few years. Cleaning instructions and more detailed maintenance requirements are available in your user manual (link to Tech Support page displaying user manuals) and rebuild kits containing all service parts are available.

While all SmartCarbs ship with float bowl drains for easy draining and float level troubleshooting, we recommend leaving fuel in the SmartCarb when stored away. Please use a fuel stabilizer when doing so and drain the carb and tank and replace with fresh fuel when running the engine again. Leaving the SmartCarb to fully dry out over a long period of time can cause premature wear (shrinking or hardening) of the o-rings and gasket components.

You may order online, over the phone, or we can send you a PayPal invoice via email.

We will need some information about your application so that we can properly pre-calibrate your SmartCarb to meet your needs. We need to know:

• Year/make/model of your application.
• Notable engine/exhaust modifications.
• How you ride or your riding style.
• What fuel type you are using and what oil and ratio you are mixing (if applicable).

A technician may reach out to you for more information if required (unique or highly modified applications).

For information about SmartCarb dealers near you please visit our Dealers page.

We use the best available priority mailing carrier. Contact us for more specific information.

Shipping rates vary by location and product type/quantity. Contact us for more specific information including expedited shipping options.

Yes.

In most cases no, SmartCarbs are designed to be a direct fit and accept stock throttle cables for applications already using Keihin PE, PJ, PWK and Mikuni VM and TM series carburetors of similar sizes. We will advise you regarding SmartCarb compatible components for unique applications if necessary.

As an American manufacturer, we are proud to offer US military service members and veterans a 10% discount with free shipping. Please contact us directly to provide proof of service when ordering.

Yes, for SmartCarb orders of 2-4 units we offer a 5% discount and for orders of 5-9 units we offer a 10% discount. To receive the discount and for SmartCarb orders of 10 or more units, please contact us directly.

The SmartCarb is a high performance fuel system that will increase horsepower and torque throughout the entire throttle range. You can expect more power delivered more linearly due to the SmartCarb’s single circuit fueling and variable venturi throttle rate. Properly tuned, the bottom end throttling is best described as being crisp, clean, and responsive with a smooth, linear transition through the mid into a forceful top end, extending the power-band a further 500-600 useable RPMs. We guarantee 10% more peak power compared to the stock fuel system.

On average SmartCarb users should expect a 30% increase in fuel economy compared to the stock fuel system in the same conditions (riding style, speed, terrain, elevation, etc). Oil injected Beta customers can expect a 40% increase in fuel economy.

Making adjustments to your SmartCarb is very easy and takes just seconds. All adjustments are made by hand and without tools. Tune while the engine and pipe stay hot!

No adjustments are required for air density factors. Should you change fuel composition while traveling to varying elevations then yes a small clicker adjustment may be warranted. Additionally you will learn that the power delivery characteristics can be modified by adjusting the clicker for optimal power delivery in varying terrain (slick, dry, rocky, etc).

The SmartCarb is extremely durable. The body components are CNC machined out of high grade aluminum and the throttle slide is hard coated with a Teflon anodize to resist wear. Consistent cleaning and replacement of service parts will keep your SmartCarb performing excellently for years.

Yes, after-sale support is one of our biggest values. We pride ourselves in our timely, personalized customer support both before and after sale. As enthusiasts who share the same passion for motorsport performance as our customers, we guide and educate anyone interested in what our technology has to offer. We are redefining what a carburetor can do and recognize that education is key to ensuring that every SmartCarb we sell meets its full potential and its owners expectations.