Yamaha Yz 450 F vs Yamaha Yz250f — which has more power?

Yamaha Yz 450 F produces ~62 hp @ 9,500 rpm (note: figure based on modern 2020+ models; earlier models ranged 55-60 hp); Yamaha Yz250f produces ~40 hp @ 12,500 rpm (estimated for modern 2019+ models; earlier models slightly less). Yamaha Yz 450 F wins by 22 hp.

Yamaha Yz 450 F vs Yamaha Yz250f — which is faster?

Top speed: Yamaha Yz 450 F ~145 km/h (note: estimated under optimal conditions on a straight; varies by rider and terrain), Yamaha Yz250f ~145 km/h (estimated; not designed for top speed — purpose-built motocross racer).

Yamaha Yz 450 F vs Yamaha Yz250f — which is lighter?

Weight: Yamaha Yz 450 F 110 kg (wet/curb weight, based on 2020+ models), Yamaha Yz250f ~105 kg (wet/curb weight — 2020+ models; earlier models slightly heavier).

Yamaha Yz 450 F vs Yamaha Yz250f — which is more fuel-efficient?

Fuel use: Yamaha Yz 450 F Estimate: ~6-8 L/100km under typical motocross/off-road riding conditions (note: highly variable depending on riding intensity; not designed for road use), 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.

Yamaha Yz 450 F vs Yamaha Yz250f — which is more reliable?

Motoryk rates Yamaha Yz 450 F 8.5/10 and Yamaha Yz250f 8.5/10. Yamaha Yz 450 F caveat: You're new to high-displacement motocross bikes. Yamaha Yz250f caveat: You want a mystery-history bargain basement deal.

Yamaha Yz 450 F vs Yamaha Yz250f — which is better for beginners?

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

Yamaha Yz 450 F vs Yamaha Yz250f — which should I commute on daily?

Both can commute, but lighter weight and gentler power win in traffic. Yamaha Yz 450 F: 110 kg, 62 hp. Yamaha Yz250f: 105 kg, 40 hp.

Yamaha Yz 450 F vs Yamaha Yz250f

Side-by-side comparison for used motorcycle buyers

Yamaha Yz 450 F vs Yamaha Yz250f. Yamaha Yz 450 F: ~62 hp @ 9,500 rpm (note: figure based on modern 2020+ models; earlier models ranged 55-60 hp) hp, 110 kg (wet/curb weight, based on 2020+ models) weight, top speed ~145 km/h (note: estimated under optimal conditions on a straight; varies by rider and terrain), 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.

Yamaha Yz 450 F

Yamaha Yz250f

Performance at a Glance

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

Yamaha Yz 450 F Yamaha Yz250f

Horsepower (hp)

62 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

~62 hp @ 9,500 rpm (note: figure based on modern 2020+ models; earlier models ranged 55-60 hp)

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

Torque

~52 Nm @ 7,500 rpm (note: estimated based on published dyno data for recent models)

~26 Nm @ 10,000 rpm (estimated)

Top Speed

~145 km/h (note: estimated under optimal conditions on a straight; varies by rider and terrain)

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

Weight

110 kg (wet/curb weight, based on 2020+ models)

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

Fuel

Estimate: ~6-8 L/100km under typical motocross/off-road riding conditions (note: highly variable depending on riding intensity; not designed for road use)

~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