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  • Brand:CRF's Only
  • Model:CO250L17RS4PP

Price : $956.84 $909.00

Available Options:
Optional Sprocket:
EFI Tuner Option:

CRF250L Rally\'17-20 - CRF\'s Only Yosh RS-4 Performance Package

CRF's Only CRF250L Rally RS-4 Performance Package

*** Use waiver required to ship to California addresses ***

Includes the following tested components for bolt-on performance:

  • Yoshimura RS-4 Full System
  • EJK Electronic Fuel Control Module


  • Power Surge 6X EFI Tuner - Think of it as a EJK on steroids! 
  • 13T Front Sprocket
The Yoshimura RS-4 is a functional work of art increasing exhaust flow and engine performance.  Full System includes an RS-4 muffler with turn-out end-cap, stainless steel header and tail-pipe, low-volume insert, all installation hardware, and step-by-step instructions.
NOTE:  The heat shield shown on the muffler is optional.