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All Bikes/Compare/Ktm Sx 450 vs Suzuki Rm-z250

Ktm Sx 450 vs Suzuki Rm-z250

Side-by-side comparison for used motorcycle buyers

Ktm Sx 450 vs Suzuki Rm-z250. Ktm Sx 450: ~63 hp @ 9,500 rpm (estimated for modern 2020+ generation) hp, ~106 kg (wet/curb weight, varies slightly by model year) weight, top speed ~145 km/h (estimated; note: motocross bikes are not optimized for top speed, this is an approximate real-world figure), Motoryk rating 8.5/10. Suzuki Rm-z250: ~40 hp @ 13,000 rpm (Note: estimated; Suzuki does not officially publish power figures) hp, 104 kg (wet/curb weight, based on 2019-2023 models) weight, top speed ~120 km/h (Note: estimated real-world; not designed for top speed but for off-road performance), Motoryk rating 7.5/10.

Performance at a Glance

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

Ktm Sx 450 Suzuki Rm-z250
Horsepower (hp)
63 hp
40 hp
Torque (Nm)
54 Nm
26 Nm
Top Speed (km/h)
145 km/h
120 km/h
Weight (kg) — lower is better
106 kg
104 kg
Type
Motocross
Motocross
Horsepower
~63 hp @ 9,500 rpm (estimated for modern 2020+ generation)
~40 hp @ 13,000 rpm (Note: estimated; Suzuki does not officially publish power figures)
Torque
~54 Nm @ 7,000 rpm (estimated for modern 2020+ generation)
~26 Nm @ 11,500 rpm (Note: estimated; official figures not published by Suzuki)
Top Speed
~145 km/h (estimated; note: motocross bikes are not optimized for top speed, this is an approximate real-world figure)
~120 km/h (Note: estimated real-world; not designed for top speed but for off-road performance)
Weight
~106 kg (wet/curb weight, varies slightly by model year)
104 kg (wet/curb weight, based on 2019-2023 models)
Fuel
~7–9 L/100km (estimated; highly variable depending on riding intensity — note: motocross bikes are not typically measured by fuel economy)
~6.5 L/100km (Note: estimated; motocross bikes vary greatly by riding intensity)
Fairing
No
No

Individual Reviews

Ktm Sx 450
Ktm Sx 450
8.5/10

"Extraordinary machine that ruthlessly punishes neglectful owners and rewards disciplined ones."

Pros
+Best-in-class power delivery
+Exceptional factory-grade suspension
+Lightweight chromoly frame
Cons
Brutal mandatory maintenance schedule
Unforgiving for intermediate riders
Expensive genuine KTM parts
Suzuki Rm-z250
Suzuki Rm-z250
7.5/10

"A rewarding machine — if you buy one that's been loved."

Pros
+Best-in-class chassis handling
+Strong, usable mid-range power
+Premium Showa suspension components
Cons
Frequently neglected by owners
Expensive to maintain properly
Tight valve adjustment intervals

Top 10 Accessories

Picks that work on either bike.

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Akrapovic Racing Line Full Exhaust KTM 450 SX-F
Akrapovič · Exhaust System
Akrapovic Racing Line Full Exhaust KTM 450 SX-F
View on Amazon →
Twin Air Foam Air Filter KTM 450 SX-F
Twin Air · Air Filter
Twin Air Foam Air Filter KTM 450 SX-F
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Acerbis X-Ultimate Handguards KTM Orange
Acerbis · Hand Guards
Acerbis X-Ultimate Handguards KTM Orange
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Renthal Ultralight Sprocket & Chain Kit KTM 450 SX
Renthal · Chain & Sprocket
Renthal Ultralight Sprocket & Chain Kit KTM 450 SX
View on Amazon →
Renthal Dual Compound Waffle Grips Motocross
Renthal · Grips
Renthal Dual Compound Waffle Grips Motocross
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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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Mesh Riding Jacket
Jacket
Mesh Riding Jacket
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Riding Boots
Boots
Riding Boots
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Chain Lube & Cleaner Kit
Chain Lube
Chain Lube & Cleaner Kit
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