Yoshimura · RS-12 · Slip-On
The Yoshimura RS-12 Enduro Series Exhaust System is a slip-on aluminum muffler built to bring a stronger, more responsive feel to the bike while keeping the setup straightforward. Designed for enduro and off-road use, this RS-12 Slip-On targets riders looking for a noticeable boost in acceleration and overall engine performance.
It fits Husqvarna FE350S 2024, Husqvarna FE501S 2024, 2026, KTM 350EXC-F 2024, and KTM 500EXC-F 2024–2026 (see the fitment table below). Note: factory turn signals must be relocated, as the muffler outlet is inline of the factory turn signal location.
Performance
Engineered for dramatic improvements in acceleration and overall engine performance. The manufacturer states this setup delivered Max Horsepower Increase: + 20% and Max Torque Increase: + 8.2%, highlighting how responsive these models can be to the RS-12 Enduro Series slip-on design.
Sound
Yoshimura’s Precision Taper Fit (PTF) insert system is designed to make swapping the sound insert or spark arrestor straightforward. That quick-change approach supports rapid adjustments on the go, making it well suited to trail and off-road riding where conditions and preferences can change.
Installation
The RS-12 design is optimized to provide ample clearance for the brake caliper, helping avoid interference with braking components. This packaging detail supports confident installation and helps keep key chassis and brake areas clear for proper function.
Performance
Built as part of Yoshimura’s Enduro Series Exhaust System lineup, this RS-12 is a slip-on solution that focuses on performance-focused design without requiring a full system change. The muffler is aluminum, and the overall concept targets off-road and trail riders who want a more aggressive, performance-driven setup while maintaining a practical approach to installation and service.
Installation
This RS-12 slip-on is described as delivering major power gains even with the pre-installed spark arrestor. For riders who want performance while retaining the spark arrestor in place, the RS-12 is positioned as a strong option, combining the benefits of a performance muffler with the convenience of staying configured for spark arrestor use.
Fitment
This Yoshimura slip-on is specified for Husqvarna FE350S 2024, Husqvarna FE501S 2024, 2026, KTM 350EXC-F 2024, and KTM 500EXC-F 2024–2026. Before installation, confirm the application in the fitment table below. Installation includes an important note: factory turn signals must be relocated because the muffler outlet is inline of the factory turn signal location. An installation PDF is provided on the page for reference.
| Part Number | 265022S320 |
|---|---|
| Brand | Yoshimura |
| Product Line | Enduro Series Exhaust System |
| Series | RS-12 |
| System Type | Slip-On |
| Material | Aluminum |
| Shipping Weight | 12 lb |
| Barcode | 00840025915800 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART" |
| Make | Model | Model Years |
|---|---|---|
| Husqvarna | FE350S | 2024 |
| Husqvarna | FE501S | 2024, 2026 |
| KTM | 350EXC-F | 2024 |
| KTM | 500EXC-F | 2024–2026 |
Fitment as listed by Yoshimura for part number 265022S320.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
