Yoshimura YOSHIMURA RS-12 Signature Series Complete LineKAWASAKI 450 KX 450 - 2024 - 2026Ref : YO00076A / 1126506

YOSHIMURA RS-12 Signature Series — Full System (Manufacturer Part No. 244730S320)

Designed for the Kawasaki KX450 (2024–2026 models), the RS-12 Signature Series full system delivers a racing finish tailored for off-road and motocross riding. Developed in collaboration with Steward Baylor and manufactured in Chino, California, this system combines hydroformed tubing with an oval outlet and asymmetrical silencer to optimize engine performance and trail handling.

• Materials: stainless steel tubing and body for durability, matte carbon fiber end cap and cover for a lightweight and resilient look.
• Performance: power and torque gains reported by Yoshimura (notable improvement in peak power and maximum torque), with a smoother power delivery thanks to the oval collector.
• Comfort and Installation: rubber-mounted silencer to reduce subframe vibrations; machined gaskets for precise fit and increased longevity.
• Maintenance & Options: PTF (Precision Taper Fit) system facilitates the changing of sound inserts and spark arrestor (SA-21-K sold separately).
• Homologation: FIM approved, designed for motocross competition use.

For demanding riders, the RS-12 offers a balance of performance, controlled sound, and optimized clearance for tires and calipers — a true race piece to prepare the KX450.