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IDLE MIXTURE THUMBSCREW FOR KEIHIN CV CARBURETOR Fits Big Twin 1990/1999

Bitter End - Old School Choppers, Inc. - One Stop Shopping for Hardcore Choppin'

  • Allows for quick idle mixture adjustment with no tools
  • Precise adjustment reduces emissions and helps to reduce off idle spit
  • Knurled edge for easy grip
  • Precision tip shape for maximum efficiency
  • Requires removal of the factory installed welsh plug for installation
Yost Performance
Fits Big Twin 1990/1999, Twin Cam 1999/2006 & Sportster 1988/2006
 











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