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

The adjustments to our specs proved what the 2024 YZ was telling our team was right. Our revised RS-12 Signature Series full system added 2.5% max HP and 2.8% max torque over stock. This is why we develop and test all of our products!

Our RS-12 mufflers have loads of features, including our PTF insert system that makes changing inserts a breeze and an optimized muffler shape with added volume and brake calliper clearance.

Yoshimura's RS-12 system is proudly designed, developed, and manufactured in Chino, California.

NEW YZ250F RS-12 Features and benefits

• Aggressive, intelligently designed, asymmetrically shaped RS-12 profile allows maximized muffler volume that helps manage sound, add power, and provide more clearance for tyres and brake callipers.
• Improved performance gains
• Just like the work systems our Factory Racers use, RS-12 systems utilize precision machined joints. Machined joints provide a superior and exacting fit for joints by better securing the seal between two surfaces with a perfect 360-degree contact surface, which translates into improved system life, fit and performance.
• Works-look matte carbon fibre end cap with industry-leading design, innovation and detailing as expected from Yoshimura.
• Carbon end cap covering an inner cap mounted design improves durability and ease of servicing as compared to other sandwich mounting designs most commonly found in the industry.
• The new patent-pending Precision Taper Fit (PTF) insert ring makes it easy to install and remove sound inserts and spark arresters.
• The tapered muffler body inlet design of RS-12 enables the system to be pushed forward, thus helping with weight centralization without sacrificing performance