Yoshimura RS-12 Stainless Full Exhaust for Yamaha YZ450F 2023-2025

Yoshimura RS-12 Signature Series for the 2023 Yamaha YZ450F

The legendary Yamaha YZ450F is completely reimagined for 2023 — lighter, faster, and built to inspire the next generation of motocross champions.

Improving an already exceptional machine wasn’t easy, but that’s exactly what we set out to do. Through extensive testing and refinement, Yoshimura’s engineering team dialed in the perfect combination of tube diameter, length, and design to unlock the YZ450F’s full potential.

The result is the all-new RS-12 Signature Series — a system that boosts maximum horsepower by 8% and torque by an incredible 13% across the powerband. The enhanced low- to mid-range response provides a more connected, controllable feel without affecting the YZ’s precise handling. Every twist of the throttle now delivers smoother, stronger acceleration that riders can truly feel.

Key Features and Benefits – 2023 YZ450F RS-12

Optimized RS-12 Asymmetrical Design

• Aggressive, intelligently engineered shape maximizes muffler volume to manage sound, enhance power, and improve clearance for tire and brake caliper.

Performance-Focused Engineering

• Precision-machined joints provide a perfect 360° seal for superior fit, durability, and system longevity — the same technology trusted by Yoshimura Factory Racers.

Carbon Fiber End Cap

• Premium matte carbon finish with Yoshimura’s signature race-inspired design.

• Inner cap mounting increases strength and simplifies maintenance compared to traditional multi-layer systems.

Precision Taper Fit (PTF) Insert System

• Patent-pending design allows quick, tool-free installation and removal of sound inserts and spark arrestors.

Tapered Muffler Inlet

• Enables forward positioning for improved weight centralization without compromising power or handling balance.

Maintenance and Accessories

• Repack kits, optional inserts, and spark arrestors are available for all RS-12 models.

Proudly designed, developed, and manufactured in the USA — by Yoshimura R&D.

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