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All Bikes/Compare/Ktm Sx 250 vs Yamaha Yz450f

Ktm Sx 250 vs Yamaha Yz450f

Side-by-side comparison for used motorcycle buyers

Ktm Sx 250 vs Yamaha Yz450f. Ktm Sx 250: Approx. 46–49 hp @ 9,000–10,000 rpm (note: estimate based on recent model years; KTM does not always publish official figures) hp, Approx. 102 kg (wet/curb weight — 2022–2024 models) weight, top speed Approx. 110–120 km/h (note: estimate; top speed is limited in motocross use and varies by gearing), Motoryk rating 8.5/10. 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.

Performance at a Glance

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

Ktm Sx 250 Yamaha Yz450f
Horsepower (hp)
hp
60 hp
Torque (Nm)
Nm
53 Nm
Top Speed (km/h)
km/h
145 km/h
Weight (kg) — lower is better
kg
110 kg
Type
Motocross
Motocross
Horsepower
Approx. 46–49 hp @ 9,000–10,000 rpm (note: estimate based on recent model years; KTM does not always publish official figures)
Approximately 60–63 hp @ 9,500 rpm (varies by model year; 2020+ models produce near the upper end)
Torque
Approx. 42–45 Nm @ 8,000–9,000 rpm (note: estimate; official figures not consistently published)
Approximately 53–55 Nm @ 8,000 rpm (estimate; Yamaha does not officially publish torque figures for this model)
Top Speed
Approx. 110–120 km/h (note: estimate; top speed is limited in motocross use and varies by gearing)
Approximately 145–155 km/h (estimate based on dyno and track testing; not an officially published figure)
Weight
Approx. 102 kg (wet/curb weight — 2022–2024 models)
110 kg (curb/wet weight, approximate for 2018–2023 models; earlier models slightly heavier)
Fuel
Estimated 6–9 L/100km depending on riding intensity (note: highly variable in off-road/motocross use)
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
No
No

Individual Reviews

Ktm Sx 250
Ktm Sx 250
8.5/10

"A brilliant, brutal machine that rewards preparation and punishes neglect."

Pros
+Explosive, addictive two-stroke power
+World-class WP suspension
+Lightweight and flickable chassis
Cons
Powervalve neglect is rampant
Unforgiving for inexperienced riders
Maintenance intervals demand strict discipline
Yamaha Yz450f
Yamaha Yz450f
8.5/10

"Brilliant but unforgiving — buy smart or get burned fast."

Pros
+Exceptional power-to-weight ratio
+Class-leading chassis balance
+Strong aftermarket parts availability
Cons
Maintenance intervals brutally short
Punishing for beginner riders
Suspension needs frequent rebuilding

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