Yoshimura RS-4 Signature Series SilencerYAMAHA 250 YZ 250 F - 2024 - 2026Ref : YO00016A / 1125472

YOSHIMURA RS-4 Signature Series — Manufacturer's ref: 231032D320

Designed for racing and motocross training, the Yoshimura RS-4 Signature silencer offers a refined finish and controlled sound without sacrificing compliance. For the 2024 YZ250F, Yoshimura reports a measured gain of +1% in maximum power and +1.2% in maximum torque: figures confirmed on the dyno that translate into a slight increase in punch at throttle opening and better mid-range performance.

Manufactured in Chino (California), this model combines high-quality materials and craftsmanship: carbon cover, stainless steel body, and a two-stage baffle to control acoustic pressure. FIM homologation for regulated competition use. Option to integrate a spark arrestor for off-road outings.

• Pentagonal sleeve for a racing aesthetic and optimized flow
• Carbon fibre cap acting as a poly-resonant chamber to reduce noise
• Two-stage deflector (baffle) for controlled response
• Stainless steel exhaust pipe, durable finish
• FIM approved; compatible with spark arrestor (off-road option)

Ideal for YZ250F riders seeking a performance-oriented, robust, and racing-styled component, the RS-4 Signature combines a refined finish with performance-focused adjustments for the track.