CRF250L / Rally Yoshimura RS-4 Slip-On Muffler
CRF250L / Rally Yoshimura RS-4 Slip-On Muffler

SRMOTO PARTNER PRODUCT - Where To Buy:
We no longer carry this product, but you can order it and other exhaust systems from one of our trusted partners/affiliates. If you make a purchase from them, we do receive a small portion of the sale, at no extra cost to you.

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  • Home > Dual Sport > Honda CRF250L Parts
    Home > Dual Sport > Honda CRF250L Rally Parts > Yoshimura RS-4 Slip-On Muffler

    Everything you need to unleash the full potential of your Honda CRF250L or CRF250L Rally! Our Yoshimura RS-4 Performance Slip-On Package starts out with Yoshimura's RS-4 Slip-On Muffler, featuring a turn-out end-cap, mid-pipe, and low-volume insert. This system re-uses your stock header pipe which connects to the Yoshi mid pipe. You can optionally add an EFI (electronic fuel injection) Controller, which is a plug-n-play device that will help take advantage of your new performance exhaust system and also make your bike run properly. Finally, you can also optionally add a heat shield for the muffler and also a 13 Tooth Front Sprocket and/or a Yoshimura Spark Arrestor Kit.

    The Yoshimura RS-4 Muffler is a unique design with predicated power and a quiet earthy exhaust note that speaks volumes for performance. This RS-4 features all the benefits of Yoshi's original RS-4 muffler, but with a unique turned-out end-cap, designed to direct exhaust heat and gases away from the bike's components. To top-it-off, they embossed the Yoshimura "347" logo in the carbon for a clean look. A heat-shield was also added to the poly-resonant chamber to keep rider and passenger legs from exhaust heat. With all its benefits in mind, the RS-4 was an obvious choice for the CRF250L.

    Fitment: 2017+ Honda CRF250L and Rally

    Weight Savings:
    CRF250L Stock Muffler w/ Heat Shield: 13.50 lbs
    CRF250L Yoshimura RS-4 Muffler w/ Heat Shield: 7.80 lbs
    TOTAL WEIGHT SAVINGS: 5.7 lbs


    PACKAGE INCLUDES THE FOLLOWING...
  • Yoshimura RS-4 Muffler with turned-out end cap
  • Yoshimura Stainless Steel Mid-Pipe
  • Yoshimura RS-4 Low volume insert
  • All installation hardware
  • Step-by-step instructions
  • Yoshimura Part #123402D520 (2017+ CRF250L / Rally)



  • CRF250L / Rally Yoshimura RS-4 Slip-On Muffler
    YOSH-123402D520
    Bike Model Year: 
    EFI Controller: 
    Heat Shield: 
    13T Front Sprocket: 





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