Compared with the outgoing Kawasaki Z1000, the new Kawasaki Z1100 represents a clear shift in philosophy rather than a simple power upgrade. While the old 1043cc Z1000 chased headline figures with 140bhp, Kawasaki has taken a different route this time, increasing capacity to 1099cc via a 3mm longer stroke—the same basic update already seen on the latest Versys 1100 and Ninja 1100SX.
On paper, the numbers suggest a step backwards. Peak power drops to 134bhp, leaving the Z1100 down on output compared with both its predecessor and several rivals. In practice, however, that figure tells only a small part of the story.
Engine Character: Built for the Road
Kawasaki has reworked the inline four extensively, fitting a heavier flywheel, milder cam profiles, revised pistons and valve springs, and a new exhaust system. The goal is obvious: stronger midrange and smoother delivery rather than chasing top-end fireworks.
The result is an engine that feels immediately more usable. Power is always on tap without needing to hunt through the gearbox, whether you’re rolling on in a high gear for an easy overtake or working the slick, light-shifting six-speed box to keep the revs spinning. At road speeds, you’d never guess the Z1100 is down on peak horsepower.
When pushed harder, the character changes subtly. The airbox develops a purposeful growl, the up/down quickshifter snaps through ratios with a satisfying crackle, and the anti-wheelie system earns its keep in the first three gears. It’s fast, but more importantly, it’s accessible.
Electronics and Refinement
The move to ride-by-wire brings with it a full suite of modern electronics, including lean-sensitive traction control, ABS, anti-wheelie, and the standard-fit quickshifter. What stands out is how seamlessly these systems operate. Nothing feels intrusive; instead, they smooth the rough edges and make the bike feel unintimidating for its performance level.
Despite the Z1100’s strong acceleration, the combination of flawless fuelling and well-judged rider aids means it’s no harder to manage than many nakeds with significantly less power. That approachability is one of the bike’s biggest strengths.
Gearing and Real-World Comfort
Longer overall gearing further reinforces the Z1100’s real-world focus. At motorway speeds, the engine is noticeably more relaxed, spinning at around 4,500rpm at 70mph, eliminating the slightly frantic feel of the old Z1000. Cruising is calmer and quieter, and you no longer find yourself subconsciously searching for a nonexistent seventh gear.
Fuel economy also benefits from this refinement. During testing, average consumption sat at 44mpg, with a best figure of 51mpg and a worst of 36mpg under harder riding—respectable numbers for a large-capacity naked with this level of performance.
Assessment
The Kawasaki Z1100 doesn’t try to win spec-sheet battles, and that’s precisely the point. By sacrificing a little peak power, Kawasaki has delivered a more rounded, more enjoyable road bike. The extra midrange grunt, smoother delivery, and improved gearing make it feel quicker and more satisfying in everyday riding than the numbers suggest.
For riders who value real-world performance, refinement, and usability over headline horsepower, the Z1100 is a thoughtful evolution of the Z formula—and arguably a better motorcycle for it.
