SmartCarb For KTM 250 SX


Ready to Race? Get equipped!

This SC2 model SmartCarb replaces the stock Keihin PWK or Mikuni TMX in KTM 250 SX dirt bikes, offering superior 21st century carburetor performance, efficiency, and ease of use.

Choose the 36mm size if you spend more time at low revs riding trail, woods, singletrack, enduro, or tight/technical conditions where the bottom end or low speed is a priority. Choose the 38mm size if you spend most of your time in the upper throttle range, riding motocross, GNCC, supermoto, desert, or if you are snowbiking.

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.

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

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

SKU: SC2-KTM250SX Categories: ,


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