Unleash Championship-Winning Performance with the Yoshimura RS-12 for the Honda CRF250/450

When it comes to dominating the motocross scene, the Lawrence brothers have proven that the right equipment makes all the difference. Their Honda CRF450s are powered by the Yoshimura RS-12 exhaust system—a game-changer developed in collaboration with Honda Japan, HRC Honda, and MXGP World Champion Tim Gajser. Designed to push the limits of performance, the RS-12 transforms your ride into a finely tuned competition machine.

Cutting-Edge Design & Unmatched Performance

The Yoshimura RS-12 isn’t just another exhaust—it’s the result of over a year of rigorous development and real-world testing. Engineered with precision, this system offers a host of advanced features designed to elevate your ride:

• Asymmetrical Shaped Muffler – Maximizes capacity while reducing noise and boosting usable power. 
• Resonance Chamber Technology – Delivers a smoother power curve with increased performance. 
• Hydroformed Oval Manifold – Precision-crafted for optimal durability and flow.
• Machined Joints – Ensures a superior 360-degree fit for longevity and peak performance.
• Matte Carbon Fiber End Cap – Factory-inspired with an innovative inner cap for easy maintenance. 
• Precision Taper Fit (PTF) Insert Ring – Makes installation and removal of spark arresters and sound inserts effortless. 
• Tapered Muffler Body – Centralizes weight for improved handling without compromising power.

Why Upgrade to the Yoshimura RS-12?

✅ More Power, Less Weight – Experience noticeable gains in horsepower and torque with a lighter overall system.

✅ Factory-Level Durability – Designed to withstand the demands of elite racing and extreme riding conditions.

✅ Easy Maintenance & Upgrades – Compatible with repack kits, sound inserts, and spark arresters (sold separately) for versatile tuning options.

✅ Proudly Designed & Manufactured in the USA – Built with premium craftsmanship to deliver top-tier performance.

Frequently Asked Questions (FAQ)

Q: Will the Yoshimura RS-12 Slip-On fit my 2021-2024 Honda CRF450R/RX? A: Yes! The RS-12 is precisely engineered to fit the 2021-2024 Honda CRF450R and CRF450RX models seamlessly, ensuring optimal performance and easy installation.

Q: Does the RS-12 system come with a spark arrestor? A: No, the RS-12 does not include a spark arrestor by default, but optional spark arrestors are available for purchase to ensure off-road compliance.

Q: What performance improvements can I expect with the RS-12 Slip-On? A: Riders report a 5% increase in max horsepower and a 6.5% boost in max torque, leading to better throttle response, smoother power delivery, and reduced rider fatigue.

Elevate Your Ride Today

If you’re serious about performance, the Yoshimura RS-12 is the upgrade your Honda CRF450 needs. Trusted by champions and engineered for excellence, this exhaust system is built to help you ride faster, harder, and with greater confidence.

Upgrade your Honda CRF450 today with the Yoshimura RS-12 and experience the difference of race-proven performance!