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All Bikes/Compare/Ktm Sx-f 450 vs Suzuki Rmz450

Ktm Sx-f 450 vs Suzuki Rmz450

Side-by-side comparison for used motorcycle buyers

Ktm Sx-f 450 vs Suzuki Rmz450. Ktm Sx-f 450: ~63 hp @ 9,000 rpm (estimated for recent 2022-2024 models; KTM does not officially publish dyno figures) hp, 101 kg (wet/curb weight — 2023 model) weight, top speed ~175 km/h (estimated; note: varies with gearing and terrain), Motoryk rating 8.5/10. Suzuki Rmz450: ~56 hp @ 9,000 rpm (estimate based on dyno testing of modern RM-Z450) hp, 111 kg (curb/wet weight — 2023 model) weight, top speed ~145 km/h (estimate; top speed is not a primary design focus for motocross bikes), Motoryk rating 7.5/10.

Performance at a Glance

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

Ktm Sx-f 450 Suzuki Rmz450
Horsepower (hp)
63 hp
56 hp
Torque (Nm)
54 Nm
52 Nm
Top Speed (km/h)
175 km/h
145 km/h
Weight (kg) — lower is better
101 kg
111 kg
Type
Motocross
Motocross
Horsepower
~63 hp @ 9,000 rpm (estimated for recent 2022-2024 models; KTM does not officially publish dyno figures)
~56 hp @ 9,000 rpm (estimate based on dyno testing of modern RM-Z450)
Torque
~54 Nm @ 7,000 rpm (estimated for recent models; note: official figures not published by KTM)
~52 Nm @ 7,500 rpm (estimate)
Top Speed
~175 km/h (estimated; note: varies with gearing and terrain)
~145 km/h (estimate; top speed is not a primary design focus for motocross bikes)
Weight
101 kg (wet/curb weight — 2023 model)
111 kg (curb/wet weight — 2023 model)
Fuel
~6-9 L/100km (estimated real-world; varies heavily with riding intensity — note: no official figure provided by KTM for off-road race use)
~6.5 L/100km (estimate; varies greatly with riding intensity — motocross use is highly variable)
Fairing
No
No

Individual Reviews

Ktm Sx-f 450
Ktm Sx-f 450
8.5/10

"A brilliant machine that demands respect, research, and deep pockets."

Pros
+Best-in-class power delivery
+WP suspension genuinely race-spec
+Excellent parts availability
Cons
Maintenance intervals brutally short
Expensive rebuild costs
Unforgiving for beginners
Suzuki Rmz450
Suzuki Rmz450
7.5/10

"Buy right and maintain it — ignore either and suffer."

Pros
+Sharp, confidence-inspiring handling
+Controllable power delivery
+Excellent suspension components
Cons
Brutal to neglected engines
Expensive valve maintenance intervals
Hard seat stock

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