Yoshimura · AT2 · Full System
The Yoshimura AT2 Race Series Exhaust System is a full system with a carbon muffler built for the Kawasaki Ninja-650 2017–2026 and Kawasaki Z650 2017–2026 (see fitment table below). Developed as part of Yoshimura’s AT2 series, it pairs an aggressive silhouette with the signature AT2 sound note while focusing on clean integration and refined overall finish.
This configuration uses a stainless steel header and tailpipe and includes the INS-20-K sound insert. Designed with improved production tolerances, the AT2 is engineered for maximum flow, improved ground clearance, and straightforward serviceability for riders who want a purposeful, race-inspired exhaust setup.
This AT2 full system uses a carbon muffler paired with a stainless steel header and tailpipe. The result is a Race Series layout that’s designed to balance durability with a premium look, while delivering the aggressive AT2 profile Yoshimura is known for.
Yoshimura’s AT2 facet-formed tip gives the system a standout visual identity. The sharp, modern shaping is a signature element of the AT2 series, tying the muffler’s appearance directly to the system’s race-focused character.
Built around improved production tolerances, the AT2 is intended to deliver consistent fit and finish. Yoshimura also emphasizes optimized flow, improved ground clearance, and a design focused on durability and ease of service for long-term ownership.
Engineering
The AT2 Race Series full system reflects Yoshimura’s blend of hands-on experience and modern digital design. Yoshimura describes the AT2’s styling, fit, and finish as the result of investments in technology and improved production tolerances, aiming for a precise, well-integrated installation on the Ninja-650 and Z650 platform. The system is made with Yoshimura’s exclusive Works Finish, reinforcing the premium, performance-driven presentation of the AT2 design.
Sound
This system includes the INS-20-K sound insert, and the sound levels are referenced using J2825 standards with the INS-20-K low volume sound insert. Additional insert options are shown on the page in the sound insert table. For riders comparing configurations, the page also provides stock and AT2 sound readings and other supporting media, including a dyno chart and product video, to help visualize the system and its character.
Fitment
Fitment is specified for Kawasaki Ninja-650 2017–2026 and Kawasaki Z650 2017–2026. For a smoother install experience, the product page includes an installation PDF alongside detailed photos and video coverage, making it easier to review mounting layout and system routing before work begins. Always confirm the exact model and year in the fitment table below to ensure proper application.
| Part Number | 14651AM221 |
|---|---|
| Brand | Yoshimura |
| Product Line | Race Series Exhaust System |
| Series | AT2 |
| System Type | Full System |
| Material | Carbon |
| Sound Insert (Included) | INS-20-K |
| Shipping Weight | 16 lb |
| Barcode | 00840025915596 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "MODIFIED PART" |
| Make | Model | Model Years |
|---|---|---|
| Kawasaki | Ninja-650 | 2017–2026 |
| Kawasaki | Z650 | 2017–2026 |
Fitment as listed by Yoshimura for part number 14651AM221.
| Part Number | Type | Included With This System |
|---|---|---|
| INS-20-K | Sound Insert | Yes |
| INS-35-K | Sound Insert | No |
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
