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All Bikes/Compare/Ktm Sx 250 vs Suzuki Rm-z 450

Ktm Sx 250 vs Suzuki Rm-z 450

Side-by-side comparison for used motorcycle buyers

Ktm Sx 250 vs Suzuki Rm-z 450. 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. Suzuki Rm-z 450: ~56 hp @ 9,500 rpm (estimated for modern 2018+ spec) hp, 110 kg (wet/curb weight) weight, top speed ~145 km/h (estimated; dependent on gearing and terrain), Motoryk rating 7.8/10.

Performance at a Glance

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

Ktm Sx 250 Suzuki Rm-z 450
Horsepower (hp)
hp
56 hp
Torque (Nm)
Nm
51 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)
~56 hp @ 9,500 rpm (estimated for modern 2018+ spec)
Torque
Approx. 42–45 Nm @ 8,000–9,000 rpm (note: estimate; official figures not consistently published)
~51 Nm @ 7,500 rpm (estimated)
Top Speed
Approx. 110–120 km/h (note: estimate; top speed is limited in motocross use and varies by gearing)
~145 km/h (estimated; dependent on gearing and terrain)
Weight
Approx. 102 kg (wet/curb weight — 2022–2024 models)
110 kg (wet/curb weight)
Fuel
Estimated 6–9 L/100km depending on riding intensity (note: highly variable in off-road/motocross use)
~5.5 L/100km (estimated; highly variable under race/off-road conditions)
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
Suzuki Rm-z 450
Suzuki Rm-z 450
7.8/10

"Fast, rewarding, but only buy one with full service history."

Pros
+Explosive, confidence-inspiring power
+Excellent factory suspension platform
+Strong parts availability
Cons
Valve maintenance costs add up
Unforgiving for beginners
Thirsty on fuel

Top 10 Accessories

Picks that work on either bike.

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🛢️
Engine Oil
10W-40 Semi-Synthetic Motorcycle Oil JASO MA
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🛢️
Motul · Engine Oil
Motul 7100 10W-40 Synthetic 1L (needs ~1.1L)
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⚙️
Oil Filter
Oil Filter for KTM SX 250
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⚙️
HifloFiltro · Oil Filter
HifloFiltro HF139
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Twin Air Air Filter for KTM SX 250
Twin Air · Air Filter
Twin Air Air Filter for KTM SX 250
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🌬️
Air Filter
Foam air filter for Suzuki RM-Z450
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Spark Plugs
Spark Plug for KTM SX 250
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Spark Plugs
Spark plug for Suzuki RM-Z450
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Full-Face Motorcycle Helmet
Helmet
Full-Face Motorcycle Helmet
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Riding Gloves
Gloves
Riding Gloves
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