2025 Kawasaki Ninja 1100SX Officially Announced

Hot on the heels of announcing the Versys 1100, Kawasaki has officially confirmed a new Ninja 1100SX for 2025. The Ninja receives similar updates to what was announced for the Versys 1100 (which has now also been confirmed for the U.S. market). The best news, though, is despite the larger engine, the Ninja 1100SX’s U.S. pricing will remain at the same $13,699 as the 1000SX model. Kawasaki also confirmed an SE version with upgraded Öhlins suspension and Brembo brakes for $15,399.

Kawasaki increased the stroke by 3 mm to 59.0 mm while keeping the bore at 77.0 mm, resulting in the displacement increasing to 1,099cc from 1,043cc. The engine also receives new 38 mm throttle bodies and a revised intake port, with Kawasaki claiming improved low and mid-range performance. Kawasaki also added a new flywheel to accommodate the new displacement and improve rideability through the low and mid range. To reduce vibrations and improve comfort, Kawasaki also added a secondary balancer.

The intake port is now narrower for increased flow velocity while the camshaft profiles produce less valve lift than the previous design. The result is improved fuel economy and, again, performance in the low-to-mid-range.

Torque peaks at a claimed 83.2 lb-ft. at 7,600 rpm, up from the 81.9 lb-ft. at 8,000 rpm claimed by the 1000SX. Kawasaki hasn’t released horsepower figures, but as we previously reported, the Ninja 1100SX has been homologated in Switzerland at 134 hp at 9,000 rpm. That would put it down on power from the 1000SX, which claims 140 hp at 10,000 rpm, but again, Kawasaki has made it clear the emphasis is on improvements at lower engine speeds.

The gearbox was also updated with longer fifth and sixth gears compared to the previous model. Kawasaki claims the longer fifth gear improves power feel while the longer top gear allows the Ninja 1100SX to cruise at highway speeds at a more comfortable engine speed. The primary reduction is also longer while the final gearing is shorter, with a net result of longer overall gearing. The bidirectional quickshifter was also updated, now functional at 1,500 rpm compared to 2,500 rpm for the previous quickshifter.

For the standard Ninja 1100SX, the chassis is identical to the 1000SX, except for a larger 260mm rear brake disc (previously 250mm). The suspension consists of a 41mm inverted cartridge front fork and horizontal back-link rear shock, both with full adjustability.

The SE model gets more substantial changes, with new Brembo M4.32 front brake calipers along with a new master cylinder and front brake rotors. The SE also comes equipped with an Öhlins S46 rear shock with a remote preload adjuster.

The electronics package is unchanged, with three ride modes and IMU-backed cornering traction control and ABS, and electronic cruise control. A full color 4.3-inch TFT display helps manage the electronics as well as smartphone connectivity via Kawasaki’s Rideology app.

The 2025 Kawasaki Ninja 1100SX will be offered in a Metallic Carbon Gray/Metallic Diablo Black color scheme while the Ninja 1100SX SE comes in Emerald Blazed Green/Metallic Diablo Black. Both models will arrive in U.S. dealerships in Winter 2025.