Kawasaki Kx125 vs Yamaha Yz450f — which has more power?

Kawasaki Kx125 produces ~38 hp @ 11,500 rpm (2003–2005 final spec); Yamaha Yz450f produces Approximately 60–63 hp @ 9,500 rpm (varies by model year; 2020+ models produce near the upper end). Yamaha Yz450f wins by 22 hp.

Kawasaki Kx125 vs Yamaha Yz450f — which is faster?

Top speed: Kawasaki Kx125 ~110 km/h (estimate — highly dependent on gearing and conditions), Yamaha Yz450f Approximately 145–155 km/h (estimate based on dyno and track testing; not an officially published figure). Yamaha Yz450f is the faster of the two.

Kawasaki Kx125 vs Yamaha Yz450f — which is more reliable?

Motoryk rates Kawasaki Kx125 8.0/10 and Yamaha Yz450f 8.5/10. Yamaha Yz450f scores higher on the overall verdict. Kawasaki Kx125 caveat: Beginners or anyone fearing two-stroke maintenance. Yamaha Yz450f caveat: Beginners or riders skipping routine maintenance schedules.

Kawasaki Kx125 vs Yamaha Yz450f — which is better for beginners?

Kawasaki Kx125 is the friendlier choice for a first bike — 38 hp is manageable. The Yamaha Yz450f is better held for a second bike.

Kawasaki Kx125 vs Yamaha Yz450f — which should I commute on daily?

Both can commute, but lighter weight and gentler power win in traffic. Kawasaki Kx125: 88 kg, 38 hp. Yamaha Yz450f: 110 kg, 60 hp.

Kawasaki Kx125 vs Yamaha Yz450f

Q: Kawasaki Kx125 vs Yamaha Yz450f — which is lighter?

Weight: Kawasaki Kx125 ~88 kg (wet/curb weight, 2005 model), Yamaha Yz450f 110 kg (curb/wet weight, approximate for 2018–2023 models; earlier models slightly heavier). Kawasaki Kx125 is lighter by 22 kg.

Q: Kawasaki Kx125 vs Yamaha Yz450f — which is more fuel-efficient?

Fuel use: Kawasaki Kx125 ~4.0 L/100km or ~25 km/L (estimate — varies significantly with riding intensity; motocross use is higher consumption), Yamaha Yz450f Estimated 6–8 L/100km under typical motocross/off-road use (note: highly variable depending on riding intensity; no official road consumption figure exists for this competition-focused bike). Real-world economy varies by rider weight, traffic, and how hard the throttle gets twisted.

Side-by-side comparison for used motorcycle buyers

Kawasaki Kx125 vs Yamaha Yz450f. Kawasaki Kx125: ~38 hp @ 11,500 rpm (2003–2005 final spec) hp, ~88 kg (wet/curb weight, 2005 model) weight, top speed ~110 km/h (estimate — highly dependent on gearing and conditions), Motoryk rating 8.0/10. Yamaha Yz450f: Approximately 60–63 hp @ 9,500 rpm (varies by model year; 2020+ models produce near the upper end) hp, 110 kg (curb/wet weight, approximate for 2018–2023 models; earlier models slightly heavier) weight, top speed Approximately 145–155 km/h (estimate based on dyno and track testing; not an officially published figure), Motoryk rating 8.5/10.

Kawasaki Kx125

Yamaha Yz450f

Performance at a Glance

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

Kawasaki Kx125 Yamaha Yz450f

Horsepower (hp)

38 hp

60 hp

Torque (Nm)

29 Nm

53 Nm

Top Speed (km/h)

110 km/h

145 km/h

Weight (kg) — lower is better

88 kg

110 kg

Type

Motocross

Horsepower

~38 hp @ 11,500 rpm (2003–2005 final spec)

Approximately 60–63 hp @ 9,500 rpm (varies by model year; 2020+ models produce near the upper end)

Torque

~29 Nm @ 10,500 rpm (estimate for late-model spec)

Approximately 53–55 Nm @ 8,000 rpm (estimate; Yamaha does not officially publish torque figures for this model)

Top Speed

~110 km/h (estimate — highly dependent on gearing and conditions)

Approximately 145–155 km/h (estimate based on dyno and track testing; not an officially published figure)

Weight

~88 kg (wet/curb weight, 2005 model)

110 kg (curb/wet weight, approximate for 2018–2023 models; earlier models slightly heavier)

Fuel

~4.0 L/100km or ~25 km/L (estimate — varies significantly with riding intensity; motocross use is higher consumption)

Estimated 6–8 L/100km under typical motocross/off-road use (note: highly variable depending on riding intensity; no official road consumption figure exists for this competition-focused bike)

Fairing