Aprilia RS 660 Extrema 2025 vs. KTM 990 Duke 2025

Aprilia RS 660 Extrema 2025

Aprilia RS 660 Extrema 2025

KTM 990 Duke 2025

KTM 990 Duke 2025

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Technical Specifications Aprilia RS 660 Extrema 2025 compared to KTM 990 Duke 2025

Aprilia RS 660 Extrema 2025
KTM 990 Duke 2025
Aprilia RS 660 Extrema 2025
Aprilia RS 660 Extrema 2025
KTM 990 Duke 2025
KTM 990 Duke 2025

Engine and Drive Train

BoreBore81 mmBore92.5 mm
StrokeStroke63.93 mmStroke70.4 mm
Engine powerEngine power100 HPEngine power123 HP
Rpm at Max. PowerRpm at Max. Power10,500 rpmRpm at Max. Power9,500 rpm
TorqueTorque67 NmTorque103 Nm
Rpm at TorqueRpm at Torque8,500 rpmRpm at Torque6,750 rpm
Compression RatioCompression Ratio13.5 Compression Ratio13.5
StarterStarterElectricStarterElectric
Clutch TypeClutch TypeMultiplate in oil-bath, AntihoppingClutch TypeAntihopping
TransmissionTransmissionChainTransmissionChain
Transmission TypeTransmission TypeGearshiftTransmission TypeGearshift
Number of gearsNumber of gears6Number of gears6
CylindersCylinders2Cylinders2
StrokesStrokes4-StrokeStrokes4-Stroke
Valves per cylinderValves per cylinder4Valves per cylinder4
ValvesValvesDOHCValvesDOHC
CoolingCoolingliquidCoolingliquid
DisplacementDisplacement659 ccmDisplacement947 ccm

Suspension Front

BrandBrandKayabaBrandWP
TravelTravel120 mmTravel140 mm
AdjustmentAdjustmentCompression, Preload, ReboundAdjustmentCompression, Rebound

Suspension Rear

Shock absorberShock absorberMonoshockShock absorberMonoshock
TravelTravel130 mmTravel150 mm
AdjustmentAdjustmentPreload, ReboundAdjustmentPreload, Rebound

Chassis

FrameFrameAluminiumFrameChromium-molybdenum
RakeRake65.9 degreeRake65.8 degree
TrailTrail104.6 mmTrail100 mm

Brakes Front

TypeTypeDouble diskTypeDouble disk
DiameterDiameter320 mmDiameter300 mm
PistonPistonFour pistonsPistonFour pistons
TechnologyTechnologyradialTechnologyradial

Brakes Rear

TypeTypeDiscTypeDisc
DiameterDiameter220 mmDiameter240 mm
PistonPistonDouble pistonPistonDouble piston

Assistance Systems

Advanced Rider Assistance SystemsAdvanced Rider Assistance SystemsABS, Riding modes, Launch-Control, Ride by Wire, Quickshifter, Traction control, Anti-wheelieAdvanced Rider Assistance SystemsABS, Riding modes, Cornering ABS, Traction control

Dimensions and Weights

Front tyre widthFront tyre width120 mmFront tyre width120 mm
Front tyre heightFront tyre height70 %Front tyre height70 %
Front tyre diameterFront tyre diameter17 inchFront tyre diameter17 inch
Rear tyre widthRear tyre width180 mmRear tyre width180 mm
Rear tyre heightRear tyre height55 %Rear tyre height55 %
Rear tyre diameterRear tyre diameter17 inchRear tyre diameter17 inch
WheelbaseWheelbase1,370 mmWheelbase1,476 mm
Seat HeightSeat Height820 mmSeat Height825 mm
Dry Weight (with ABS)Dry Weight (with ABS)166 kgDry Weight (with ABS)179 kg
Fuel Tank CapacityFuel Tank Capacity15 lFuel Tank Capacity14.5 l

Equipment

EquipmentEquipmentLED-HeadlightsEquipmentLED-Headlights

Pros and Cons in comparison

Pros and Cons in comparison

Aprilia RS 660 Extrema 2025

Aprilia RS 660 Extrema 2025

Unfortunately, our editors did not test this model.

KTM 990 Duke 2025

KTM 990 Duke 2025

The KTM 990 Duke is a bike with rough edges - in the truest sense of the word. It is not the perfect all-rounder, not the most harmonious representative of its class, but it has something that many other bikes lack: real character. Anyone looking for a naked bike that challenges and encourages them, that arouses emotions and makes no compromises, will find a loyal companion in the Duke. It is the bike for individualists, for riders who are looking for something special and are prepared to compromise for it.

Very low weight of just 192 kg

Strong two-cylinder engine with plenty of acceleration

Extremely agile and playful handling

Disengageable ABS on the rear wheel for sporty riders

Surprisingly relaxed ergonomics even for taller riders

Height of entertainment value on winding roads

Engine needs at least 3000 rpm for smooth running

Surcharge-based pricing policy for the electronic driving aids somewhat annoying

Slight tendency towards nervousness - be careful at very high speeds with luggage

Price Comparison Avarage Market Price Aprilia RS 660 Extrema vs KTM 990 Duke

Price Aprilia RS 660 Extrema

Model year
Current average market prices

Price KTM 990 Duke

Model year
Current average market prices

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