40mm SC2 SmartCarb


Build Your Own SmartCarb

This 40mm SC2 model SmartCarb is designed to replace conventional, spigot mounted carburetors in ~500cc 2-stroke applications, offering unbeatable performance and incredible ease of use. It is a direct fit in applications originally equipped with Keihin PE, PJ, PWK and Mikuni VM and TM series carburetors of similar size.

Choose this product only if you cannot find your application in the Selector Tool drop-downs on the Shop page but are confident in your ability and understanding to adapt it to your particular application or if directed to by a SmartCarb Fuel Systems technician or representative. Please review the fitment requirements detailed in the Fitment Information tab below.

The +2 Metering Rods option is recommended for unique applications and adds a one step richer metering rod and a one step leaner metering rod to your order relative to the metering rod selected and installed by the technician prior to shipping based on the application information provided. A technician may reach out for further information prior to shipping.

Every SmartCarb ships pre-adjusted specifically for the bike for which it is ordered. Please provide information in the forms below about any engine/exhaust modifications, how you ride (riding style), and what fuel selection and oil premix ratio you use. Specify which side you prefer the fuel fitting to be (standard, default location shown).

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

Products shipping internationally may be subject to import duties/taxes.

SKU: SC2-40 Category:


The SC2 SmartCarb is a precision metering instrument that provides extremely fine fuel atomization, precise mixture control, and air density compensation in a single circuit, jet-less fuel system.

  • CNC billet aluminum construction
  • Patented single fuel circuit design
  • Extremely fine fuel atomization
  • Optimal air/fuel ratio control
  • Designed & manufactured in the USA