Aprilia RX 125 2025 vs. KTM 390 Duke 2025

Technical Specifications Aprilia RX 125 2025 compared to KTM 390 Duke 2025

Aprilia RX 125 2025

KTM 390 Duke 2025

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Differences

Aprilia RX 125 2025

KTM 390 Duke 2025

Engine and Drive Train

Bore	Bore	58 mm	Bore	89 mm
Stroke	Stroke	47 mm	Stroke	64 mm
Engine power	Engine power	15 HP	Engine power	45 HP
Rpm at Max. Power	Rpm at Max. Power	10,000 rpm	Rpm at Max. Power	8,500 rpm
Torque	Torque	11.2 Nm	Torque	39 Nm
Rpm at Torque	Rpm at Torque	8,000 rpm	Rpm at Torque	7,000 rpm
Fuel system	Fuel system	Injection	Fuel system	Injection
Starter	Starter	Electric	Starter	Electric
Clutch Type	Clutch Type	Multiplate in oil-bath	Clutch Type	Multiplate in oil-bath
Transmission	Transmission	Chain	Transmission	Chain
Transmission Type	Transmission Type	Gearshift	Transmission Type	Gearshift
Number of gears	Number of gears	6	Number of gears	6
Cylinders	Cylinders	1	Cylinders	1
Strokes	Strokes	4-Stroke	Strokes	4-Stroke
Cooling	Cooling	liquid	Cooling	liquid
Displacement	Displacement	124.2 ccm	Displacement	399 ccm

Suspension Front

Front suspension	Front suspension	Upside-Down telescopic fork	Front suspension	Upside-Down telescopic fork
Diameter	Diameter	41 mm	Diameter	43 mm
Travel	Travel	240 mm	Travel	150 mm

Suspension Rear

Suspension	Suspension	Swing arm	Suspension	Swing arm
Shock absorber	Shock absorber	Monoshock	Shock absorber	Monoshock
Travel	Travel	210 mm	Travel	150 mm

Brakes Front

Type	Type	Single disk	Type	Single disk
Diameter	Diameter	260 mm	Diameter	320 mm
Piston	Piston	Double piston	Piston	Four pistons
Shock mount	Shock mount	Floating caliper	Shock mount	Floating caliper
Technology	Technology	Wave	Technology	radial

Brakes Rear

Type	Type	Disc	Type	Disc
Diameter	Diameter	220 mm	Diameter	240 mm
Piston	Piston	Single piston	Piston	Double piston
Shock mount	Shock mount	Floating caliper	Shock mount	Floating caliper

Assistance Systems

Advanced Rider Assistance Systems	Advanced Rider Assistance Systems	ABS	Advanced Rider Assistance Systems	ABS, Riding modes, Traction control

Dimensions and Weights

Front tyre width	Front tyre width	90 mm	Front tyre width	110 mm
Front tyre height	Front tyre height	90 %	Front tyre height	70 %
Front tyre diameter	Front tyre diameter	21 inch	Front tyre diameter	17 inch
Rear tyre width	Rear tyre width	120 mm	Rear tyre width	150 mm
Rear tyre height	Rear tyre height	80 %	Rear tyre height	60 %
Rear tyre diameter	Rear tyre diameter	18 inch	Rear tyre diameter	17 inch
Wheelbase	Wheelbase	1,430 mm	Wheelbase	1,357 mm
Seat Height	Seat Height	905 mm	Seat Height	800 mm
Kerb Weight (with ABS)	Kerb Weight (with ABS)	134 kg	Kerb Weight (with ABS)	165 kg
License compliancy	License compliancy	A1	License compliancy	A2