Kawasaki Kx 450 vs Yamaha Yz250f — which has more power?

Kawasaki Kx 450 produces ~55 hp @ 9,000 rpm (estimated; Kawasaki does not officially publish power figures — note: dyno results typically range 53–58 hp); Yamaha Yz250f produces ~40 hp @ 12,500 rpm (estimated for modern 2019+ models; earlier models slightly less). Kawasaki Kx 450 wins by 15 hp.

Kawasaki Kx 450 vs Yamaha Yz250f — which is faster?

Top speed: Kawasaki Kx 450 ~145 km/h (estimated; gearing and terrain dependent — note: best estimate, not manufacturer-specified), Yamaha Yz250f ~145 km/h (estimated; not designed for top speed — purpose-built motocross racer).

Kawasaki Kx 450 vs Yamaha Yz250f — which is lighter?

Weight: Kawasaki Kx 450 110 kg (curb weight, 2023 model), Yamaha Yz250f ~105 kg (wet/curb weight — 2020+ models; earlier models slightly heavier).

Kawasaki Kx 450 vs Yamaha Yz250f — which is more reliable?

Motoryk rates Kawasaki Kx 450 8.5/10 and Yamaha Yz250f 8.5/10. Kawasaki Kx 450 caveat: Intermediate riders still building fundamental skills. Yamaha Yz250f caveat: You want a mystery-history bargain basement deal.

Kawasaki Kx 450 vs Yamaha Yz250f — which is better for beginners?

Yamaha Yz250f is the friendlier choice for a first bike — 40 hp is manageable. The Kawasaki Kx 450 is better held for a second bike.

Kawasaki Kx 450 vs Yamaha Yz250f — which should I commute on daily?

Both can commute, but lighter weight and gentler power win in traffic. Kawasaki Kx 450: 110 kg, 55 hp. Yamaha Yz250f: 105 kg, 40 hp.

Kawasaki Kx 450 vs Yamaha Yz250f

Q: Kawasaki Kx 450 vs Yamaha Yz250f — which is more fuel-efficient?

Fuel use: Kawasaki Kx 450 Estimated 6–9 L/100km (note: highly variable depending on riding intensity; off-road/motocross use is not standardized for fuel economy testing), Yamaha Yz250f ~5.5 L/100km / ~18 km/L (estimated; varies significantly with riding intensity — note: off-road/motocross use makes precise figures difficult to pin down). Real-world economy varies by rider weight, traffic, and how hard the throttle gets twisted.

Side-by-side comparison for used motorcycle buyers

Kawasaki Kx 450 vs Yamaha Yz250f. Kawasaki Kx 450: ~55 hp @ 9,000 rpm (estimated; Kawasaki does not officially publish power figures — note: dyno results typically range 53–58 hp) hp, 110 kg (curb weight, 2023 model) weight, top speed ~145 km/h (estimated; gearing and terrain dependent — note: best estimate, not manufacturer-specified), Motoryk rating 8.5/10. Yamaha Yz250f: ~40 hp @ 12,500 rpm (estimated for modern 2019+ models; earlier models slightly less) hp, ~105 kg (wet/curb weight — 2020+ models; earlier models slightly heavier) weight, top speed ~145 km/h (estimated; not designed for top speed — purpose-built motocross racer), Motoryk rating 8.5/10.

Kawasaki Kx 450

Yamaha Yz250f

Performance at a Glance

Green = winner per metric · Bars are relative to the higher value

Kawasaki Kx 450 Yamaha Yz250f

Horsepower (hp)

55 hp

40 hp

Torque (Nm)

52 Nm

26 Nm

Top Speed (km/h)

145 km/h

Weight (kg) — lower is better

110 kg

105 kg

Type

Motocross

Horsepower

~55 hp @ 9,000 rpm (estimated; Kawasaki does not officially publish power figures — note: dyno results typically range 53–58 hp)

~40 hp @ 12,500 rpm (estimated for modern 2019+ models; earlier models slightly less)

Torque

~52 Nm @ 7,500 rpm (estimated; official figures not published — note: best estimate based on dyno data)

~26 Nm @ 10,000 rpm (estimated)

Top Speed

~145 km/h (estimated; gearing and terrain dependent — note: best estimate, not manufacturer-specified)

~145 km/h (estimated; not designed for top speed — purpose-built motocross racer)

Weight

110 kg (curb weight, 2023 model)

~105 kg (wet/curb weight — 2020+ models; earlier models slightly heavier)

Fuel

Estimated 6–9 L/100km (note: highly variable depending on riding intensity; off-road/motocross use is not standardized for fuel economy testing)

~5.5 L/100km / ~18 km/L (estimated; varies significantly with riding intensity — note: off-road/motocross use makes precise figures difficult to pin down)

Fairing