Qj Motor Sf450r vs Kawasaki Ninja Zx-4r
Side-by-side comparison for used motorcycle buyers
Qj Motor Sf450r vs Kawasaki Ninja Zx-4r. Qj Motor Sf450r: 47 hp @ 9,500 rpm — estimated hp, 195 kg (wet/curb weight) — estimated weight, top speed 175 km/h — estimated, Motoryk rating 7.0/10. 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
Qj Motor Sf450r
Kawasaki Ninja Zx-4r
Horsepower (hp)
47 hp
77 hp
Torque (Nm)
43 Nm
37.2 Nm
Top Speed (km/h)
175 km/h
200 km/h
Weight (kg) — lower is better
195 kg
187 kg
Type
Supersport
Supersport
Horsepower
47 hp @ 9,500 rpm — estimated
77 hp @ 14,500 rpm
Torque
43 Nm @ 7,500 rpm — estimated
37.2 Nm @ 13,000 rpm
Top Speed
175 km/h — estimated
200 km/h (estimated; approximately 185-200 km/h real-world)
Weight
195 kg (wet/curb weight) — estimated
187 kg (wet/curb weight)
Fuel
4.5 L/100km (approx. 22 km/L) — estimated
5.5 L/100km (approximately 18.2 km/L, typical real-world average)
Fairing
Yes
Yes
Individual Reviews
Qj Motor Sf450r
7.0/10
"Solid budget sportbike if you accept the reliability uncertainty."
Pros
+Punchy parallel-twin delivery
+Solid chassis and suspension
+Aggressive looks, reasonable ergonomics
Cons
−Limited long-term reliability data
−Parts sourcing can be slow
−Resale value unproven
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.
