The Inline-Four That Isn't Supposed to Work Here

Middleweight nakeds are parallel-twin country. MT-07, CB750 Hornet, GSX-8TT, Trident 800. All twins or triples. Kawasaki's Z900 kicked down the door with a 948cc inline-four and dared the class to respond. Most manufacturers aren't going to, because an inline-four in this segment makes almost no business sense: more expensive to build, more complex to maintain, usually lives higher in the rev range than casual riders want to go.

Except Kawasaki's four doesn't live up there. Chase's genuine surprise, 60 seconds into the first ride: "I'm 3,000 RPM in third and the bike is throwing me back. That's awesome. Newer-age inline fours are so good." The Z900 is inline-four character with parallel-twin accessibility, and at $9,799 it's the cheapest way to get that combination.

Performance highlights

948cc inline-four, 123 horsepower, 73 lb-ft of torque, 468 lb wet, 4.5-gallon tank. Throttle response scores a 6 because the only real knock is how the power arrives. Not that it does. From zero-throttle to first crack of the grip, there's an abrupt jump that makes fine inputs hard. "I can't give it power 0 to 10%. It just goes from 0 to 10." Once you're past that initial lurch, the delivery smooths out and the engine does the rest.

Acceleration earns 8 and was the standout surprise. The 40–80 roll-on in first gear made Chase overshoot 80 significantly. "That felt quick. That's going to be high up on the list." The missing piece is a quickshifter. Chase's direct line: "I need a quickshifter so bad, dude. I could have made it better than that." If Kawasaki offers an OEM quickshifter for this bike, he called it a "mandatory mod."

Agility is 8. 468 lb reads heavy on paper; in motion the Z900 flicks like a bike 50 lb lighter. The low-ish seat height helps. The soft suspension tune hurts it slightly. Chase would dial in firmer damping if he owned it, because the engine's punch deserves a chassis that holds its line.

Brakes rate 7. Stopping power is genuinely strong. The rear ABS is the drag. It intervenes too early under firm trailing-rear braking, which reduces confidence on technical roads. "I was not even coming to a hard stop. I put a little bit of rear brake on and I could just feel that ABS ticking away."

Suspension is 7. Fully adjustable front (preload / rebound) and rear. Stock settings are soft-leaning, tuned for comfort. If you ride aggressively, plan a Saturday morning dialing it in.

Rider experience & tech

Comfort is 7. Body position is Kawasaki-classic: you sit in the bike rather than on it, seat is low-ish, handlebars feel a little high as a result. Upright with a slight forward lean. The seat is firm. Not a long-distance champion, but fine for commutes and canyon days. Wind hits you right in the upper abs on the highway; a small windscreen would transform highway comfort.

Tech is the 6 and it's Chase's biggest pile of complaints. Mode change requires holding the up-arrow for 45 seconds. He literally had his editor time it on camera. "Kawasaki, we really need to update that. There needs to be a mode button somewhere and I go boop-boop-boop." No quickshifter. No cruise control. The TFT screen itself looks fine; the interface driving it doesn't.

Ease of use gets 8 because the physical bike is approachable. Low seat height, balanced at standstill, simple rider triangle. A new rider can hop on this without intimidation. It's the menu system that frustrates, not the motorcycle.

Versatility is 7. City: excellent. Canyon: excellent (with suspension tuning). Highway: survivable without cruise. Track day: Chase press-launched the SE version on a track and called it "an absolute weapon." Touring: no without mods.

Fun-for-the-money is 7. Solid value for sub-$10k with genuine inline-four character. But the feature-list gaps (no QS, no cruise, dated UX) keep it out of the 9+ range the CB750 Hornet earned at a lower price.

The Chase Score & final thoughts

With a Chase Score of 71/100, Good Tier, the Z900 is the bike for riders who specifically want inline-four character in a middleweight naked and are willing to forgive a few missing conveniences. 36 ride points + 35 usability points.

Buy it if you're coming off a super-sport and want that four-cylinder thrum without clip-ons destroying your back, OR if you specifically want something different in a class dominated by twins and triples. Skip it if you need cruise control / a quickshifter out of the box. The CB750 Hornet has both at a lower price. Chase's target rider: "a rider currently on an inline-four super-sport who finds themselves really enjoying the thrilling riding experience but is getting older, tired of the back pain. You get all the thrilling experience, except you're not leaned the hell over."