The Kawasaki Z250's top speed varies depending on the variant. The Z250 SL, with its 249cc single-cylinder engine, can reach around 130 km/h, while the Z250 ABS, equipped with a 248cc parallel-twin engine, can achieve speeds closer to 150 km/h. Additionally, the Z250 can easily cross the 150 km/h mark in its second gear due to its tall gear ratios and smooth gearbox.