Kawasaki Zx-25r vs Kawasaki Ninja Zx-4r
Side-by-side comparison for used motorcycle buyers
Kawasaki Zx-25r vs Kawasaki Ninja Zx-4r. Kawasaki Zx-25r: 45 hp @ 15,500 rpm hp, 183 kg (wet/curb weight) weight, top speed ~185 km/h (estimated; some sources report up to 190 km/h), Motoryk rating 8.5/10. Kawasaki Ninja Zx-4r: 77 hp @ 14,500 rpm hp, 187 kg (wet/curb weight) weight, top speed 200 km/h (estimated; approximately 185-200 km/h real-world), Motoryk rating 8.5/10.
Performance at a Glance
Green = winner per metric · Bars are relative to the higher value
Kawasaki Zx-25r
Kawasaki Ninja Zx-4r
Horsepower (hp)
45 hp
77 hp
Torque (Nm)
21.7 Nm
37.2 Nm
Top Speed (km/h)
185 km/h
200 km/h
Weight (kg) — lower is better
183 kg
187 kg
Type
Supersport
Supersport
Horsepower
45 hp @ 15,500 rpm
77 hp @ 14,500 rpm
Torque
21.7 Nm @ 13,000 rpm
37.2 Nm @ 13,000 rpm
Top Speed
~185 km/h (estimated; some sources report up to 190 km/h)
200 km/h (estimated; approximately 185-200 km/h real-world)
Weight
183 kg (wet/curb weight)
187 kg (wet/curb weight)
Fuel
~5.5 L/100km (approximately 18 km/L, real-world estimate)
5.5 L/100km (approximately 18.2 km/L, typical real-world average)
Fairing
Yes
Yes
Individual Reviews
Kawasaki Zx-25r
8.5/10
"The most addictive 250 ever built, buy it without hesitation."
Pros
+Screaming inline-four exhaust note
+Razor-sharp chassis and handling
+Incredible mechanical novelty factor
Cons
−Expensive valve clearance checks
−Needs constant high revs
−Limited low-end torque
Kawasaki Ninja Zx-4r
8.5/10
"The best small-bore inline-four you can buy right now."
Pros
+Screaming high-rev character
+Flickable, communicative chassis
+Adjustable suspension standard
Cons
−Early throttle-by-wire glitches
−Tight, expensive service intervals
−Often previously abused hard
Top 10 Accessories
Picks that work on either bike.
