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Mikuni TMX 38 mm Flat Valve Carburetor

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TM Series Carburetors provide significant performance improvements over older design round slide carburetors. Air flows faster and smoother through the TM Series venturi due to the flat slide configuration and the jet blocks which help create a smoothbore effect. The high velocity of the air flow means a stronger vacuum at the needle jet, providing more precise metering and better throttle response

  • Significant performance improvements over older round slide carbs
  • Flat slide design helps create a smooth bore effect, increasing airflow
  • Great throttle response because of more precise fuel metering
  • All are center-pull style throttle unless noted by footnote
  • Jetting may need to be changed per application; see chart for included jetting
  • Uses geniune Mikuni jets and parts for best results
  • Faster and smoother air flow at the venturi results in better atomization and increased throttle response
  • Power-Jet kit may be used
  • All TMX type carbs use most VM components
  • Sold each
  • Made in Japan


  • Spigot OD: 44mm
  • Main Jet: 340
  • Pilot Jet: 25
  • Inlet Valve: 1.5
  • Needle Jet: 389 Q-0
  • Jet Needle: 6FJ40
  • Throttle Slide: 4.0
  • Choke Type: Cable
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