Power gain
+19bhp
106bhp ZRX1100 → 125bhp Z900. Modern bike makes more power with 100cc less capacity. Going from air-cooled to liquid-cooled, carbs to fuel injection.
Engine architecture
Inline four throughout
Every bike on this page is an inline four. Kawasaki has stayed loyal to the four-cylinder layout for the Z naked range when others (Yamaha, Triumph) have gone to triples or twins. The Kawasaki Z is the last big middleweight inline-four naked at this price point.
Real cost change
−£3.8k
ZRX1100 was about £6,500 in 1997 (£13,000 today). The 2026 Z900 is £9,499 — about 29% cheaper in real terms. Kawasaki pricing the Z range to compete with the MT-09 and Street Triple.
Weight progression
Up then downkg
224kg dry ZRX → 202kg Z750 → 231kg Z800 → 212kg Z900. The Z800 was the heaviest bike in this lineage; the modern Z900 is back down to MT-09 territory.
Z styling DNA
Sharp angles since 2003
The Z naked lineage uses sharp, angular bodywork — the "Z" design language. Started with the original Z1000 in 2003 and the Z750 in 2004, refined since. The 2024 Z900 update kept the same visual language despite all-new electronics.
Rider aids count
0 → 8
1996: nothing. 2026: cornering ABS, traction control, ride modes, quickshifter, smartphone, hill control, IMU electronics, slide control. Catching up to its rivals.
Cheapest way in
£2.5k
A clean Z750 from 2007-2010. Liquid-cooled inline four, modern naked styling, indestructible. Underrated on the used market and arguably better value than a new MT-07.
