While other exhaust brands just carried over their Yamaha YZ250F offerings to include 2024 model, on the dyno and track, the new YZ told Yoshimura there was more on the table. So their R&D team went to work to optimise the new Yamaha.

Revised for the 2024 is Yoshimura's RS-4 slip-on for the new YZ250F. Adding 1% max HP and 1.2% max torque, the RS-4 slip on is a great option for adding some power. RS-4 also has the ability to add a spark arrestor for off-road adventures.

Yoshimura's RS-4 system is proudly designed, developed and manufactured in Chino, California.

RS-4 Features and benefits:

• Pentagonal-shaped sleeve
• Front muffler cap functions as a poly-resonant chamber which helps reduce noise
• Two-stage stepped baffle
• Carbon fibre end-cap
• Stainless steel tail-pipe
• Repack Kits, optional Inserts and Spark Arresters are available for all models
• Proudly made in the USA!

ADDITIONAL INFORMATION

VIEW INSTALLATION INSTRUCTIONS

BIKE FITMENT

YAMAHA

• WR250F 2025-2026
• YZ250F 2024-2026
  
• YZ250FX 2025-2026