Ktm Sx 450 vs Suzuki Rmz450
Side-by-side comparison for used motorcycle buyers
Performance at a Glance
Green = winner per metric · Bars are relative to the higher value
Ktm Sx 450
Suzuki Rmz450
Horsepower (hp)
63 hp
56 hp
Torque (Nm)
54 Nm
52 Nm
Top Speed (km/h)
145 km/h
145 km/h
Weight (kg) — lower is better
106 kg
111 kg
Type
Motocross
Motocross
Horsepower
~63 hp @ 9,500 rpm (estimated for modern 2020+ generation)
~56 hp @ 9,000 rpm (estimate based on dyno testing of modern RM-Z450)
Torque
~54 Nm @ 7,000 rpm (estimated for modern 2020+ generation)
~52 Nm @ 7,500 rpm (estimate)
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 (estimate; top speed is not a primary design focus for motocross bikes)
Weight
~106 kg (wet/curb weight, varies slightly by model year)
111 kg (curb/wet weight — 2023 model)
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 (estimate; varies greatly with riding intensity — motocross use is highly variable)
Fairing
No
No
Individual Reviews
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 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