Ninja/Z 650 Race AT2 Full Exhaust Installation Guide
By Yoshimura R&D of America, Inc. | Published: 2026-10-25
Category: How-to Guides
Step-by-step guide to installing the Yoshimura Race AT2 full exhaust on a Ninja/Z 650, including tools, torque specs, and common mistakes to avoid.
Quick Answer
Install the Yoshimura Race AT2 full exhaust on your Ninja/Z 650 by following a systematic process: gather tools, remove the stock system, fit the new pipes, and torque everything to spec. Expect about 2–3 hours for a first-time install.
Why Choose the Race AT2 Full System
The Yoshimura Race AT2 full exhaust is designed for the current-generation Ninja/Z 650, offering a matte finish carbon fiber sleeve option that stands out visually. It's a full system, meaning it replaces the header pipes and muffler, which can provide weight savings and a more aggressive sound compared to a slip-on.
Because it's a race-oriented system, it may not include a catalytic converter or meet all street-legal noise regulations in your area. Check local laws before installing if you plan to ride on public roads.
Tools and Preparation
You'll need basic hand tools: socket set with extensions, Allen keys, torque wrench, penetrating oil, and possibly a hacksaw or exhaust cutter if the stock system is rusted or stuck. Have a clean workspace and a way to support the bike securely, like a rear stand or center stand.
Before starting, let the bike cool completely to avoid burns and to make removal easier. Spray penetrating oil on all exhaust mounting bolts and let it sit for 10–15 minutes.
Installation Steps
- Remove the stock exhaust: Disconnect the O2 sensor and unbolt the exhaust from the cylinder head and the rear mount. Slide the stock system out carefully. If bolts are seized, use penetrating oil and let it soak. Check that the O2 sensor wiring is free before pulling the pipe to avoid tearing it.
- Prepare the new system: Lay out the Yoshimura AT2 components and verify you have all parts. Apply a thin layer of anti-seize to the header studs and the mid-pipe joint to ease future removal. Dry-fit the system loosely before tightening anything to ensure proper alignment.
- Mount the headers and mid-pipe: Slide the header pipes onto the studs, then attach the mid-pipe. Use new gaskets if supplied. Tighten the header nuts gradually in a crisscross pattern. Do not fully tighten the header nuts until the muffler is mounted to avoid binding.
- Install the muffler and secure the system: Attach the muffler to the mid-pipe and the rear hanger. Tighten all clamps and hanger bolts to the specified torque. Reconnect the O2 sensor. Ensure the O2 sensor is routed away from moving parts and heat sources.
- Check for leaks and test ride: Start the engine and listen for exhaust leaks at the joints. Rev gently to check for rattles. After a short ride, re-tighten the header nuts and clamps once everything has heat-cycled. Recheck all fasteners after the first ride—heat can loosen them.
Product Facts
- NINJA/Z 650 17-26 Race AT2 Stainless Full Exhaust, w/ Stainless Muffler: This full system is designed for the 2017–2026 Ninja/Z 650 and is the first matte finish carbon fiber sleeve option from Yoshimura R&D. The matte carbon fiber sleeve not only looks distinctive but also helps reduce weight compared to a standard stainless muffler, improving handling and aesthetics.
NINJA/Z 650 17-26 Race AT2 Stainless Full Exhaust, w/ Stainless Muffler
