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

Ktm Sx 450 vs Suzuki Rm-z 450

Side-by-side comparison for used motorcycle buyers

Ktm Sx 450 vs Suzuki Rm-z 450. 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-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 450 Suzuki Rm-z 450
Horsepower (hp)
63 hp
56 hp
Torque (Nm)
54 Nm
51 Nm
Top Speed (km/h)
145 km/h
145 km/h
Weight (kg) — lower is better
106 kg
110 kg
Type
Motocross
Motocross
Horsepower
~63 hp @ 9,500 rpm (estimated for modern 2020+ generation)
~56 hp @ 9,500 rpm (estimated for modern 2018+ spec)
Torque
~54 Nm @ 7,000 rpm (estimated for modern 2020+ generation)
~51 Nm @ 7,500 rpm (estimated)
Top Speed
~145 km/h (estimated; note: motocross bikes are not optimized for top speed, this is an approximate real-world figure)
~145 km/h (estimated; dependent on gearing and terrain)
Weight
~106 kg (wet/curb weight, varies slightly by model year)
110 kg (wet/curb weight)
Fuel
~7–9 L/100km (estimated; highly variable depending on riding intensity — note: motocross bikes are not typically measured by fuel economy)
~5.5 L/100km (estimated; highly variable under race/off-road conditions)
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-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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Akrapovic Racing Line Full Exhaust KTM 450 SX-F
Akrapovič · Exhaust System
Akrapovic Racing Line Full Exhaust KTM 450 SX-F
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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
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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
View on Amazon →
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