Yoshimura AT2 Race Stainless Full Exhaust System | Kawasaki Ninja 650 / Z650 2017-2026 | Closed-Course

The Yoshimura AT2 Race Stainless Full Exhaust System is a complete closed-course header-back exhaust for the 2017-2026 Kawasaki Ninja 650 and Z650, built from stainless steel in Yoshimura's exclusive Works Finish with a matte carbon fiber end cap and a model-specific carbon fiber heel guard, lifting peak horsepower 6.5% and peak torque 3.1% while cutting the exhaust to 9.1 pounds — less than half the weight of the stock system.

Halving the exhaust weight is the headline on the 650 twins. Kawasaki's stock system is a large catalyzed assembly hung low on a bike that is otherwise light and flickable, so removing that mass changes how the motorcycle turns as much as the power gain changes how it accelerates.

The AT2 canister is Yoshimura's current-generation Race Series profile, with the new faceted inner end cap assembly under a matte carbon outer cap. The Works Finish develops its colour through the system's first heat cycles on the bike, ending up close in appearance to the titanium works components on Yoshimura's factory race machines. Built in Chino, California.

• Complete header-back full exhaust system — replaces the entire stock exhaust
• Stainless steel header, muffler and tailpipe in exclusive Yoshimura Works Finish
• All-new faceted matte carbon fiber end cap assembly
• Custom matte carbon fiber heel guard specific to the Ninja 650 / Z650
• 6.5% increase in peak horsepower and 3.1% increase in peak torque
• 9.1 lb system weight — drops over half the weight of the stock exhaust
• Yoshimura part number 960-2551 (manufacturer part 14651AM521)
• Designed, developed and manufactured in Chino, California, USA
• Race Series — for closed-course competition only, not legal for street use on an emissions-controlled vehicle

Fits the 2017-2026 Kawasaki Ninja 650 and Z650 as a direct replacement for the complete stock exhaust, and is the standard full-system choice for 650 twin track bikes, twins-class club racing and closed-course builds.