Aprilia RS 660 Extrema 2024 vs. Kawasaki Z900 SE 2025

Aprilia RS 660 Extrema 2024

Aprilia RS 660 Extrema 2024

Kawasaki Z900 SE 2025

Kawasaki Z900 SE 2025

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Technical Specifications Aprilia RS 660 Extrema 2024 compared to Kawasaki Z900 SE 2025

Aprilia RS 660 Extrema 2024
Kawasaki Z900 SE 2025
Aprilia RS 660 Extrema 2024
Aprilia RS 660 Extrema 2024
Kawasaki Z900 SE 2025
Kawasaki Z900 SE 2025

Engine and Drive Train

Engine typeEngine typeIn line crankpin offsetEngine typeIn line
BoreBore81 mmBore73.4 mm
StrokeStroke63.93 mmStroke56 mm
Engine powerEngine power100 HPEngine power124 HP
Rpm at Max. PowerRpm at Max. Power10,500 rpmRpm at Max. Power9,500 rpm
TorqueTorque67 NmTorque97.4 Nm
Rpm at TorqueRpm at Torque8,500 rpmRpm at Torque7,700 rpm
Compression RatioCompression Ratio13.5 Compression Ratio11.8
Fuel systemFuel systemInjectionFuel systemInjection
Clutch TypeClutch TypeMultiplate in oil-bath, AntihoppingClutch TypeMultiplate in oil-bath
TransmissionTransmissionChainTransmissionChain
Transmission TypeTransmission TypeGearshiftTransmission TypeGearshift
Number of gearsNumber of gears6Number of gears6
CylindersCylinders2Cylinders4
StrokesStrokes4-StrokeStrokes4-Stroke
Valves per cylinderValves per cylinder4Valves per cylinder4
ValvesValvesDOHCValvesDOHC
CoolingCoolingliquidCoolingliquid
DisplacementDisplacement659 ccmDisplacement948 ccm

Suspension Front

Front suspensionFront suspensionUpside-Down telescopic forkFront suspensionUpside-Down telescopic fork
DiameterDiameter41 mmDiameter41 mm
TravelTravel120 mmTravel120 mm
AdjustmentAdjustmentCompression, Preload, ReboundAdjustmentPreload, Rebound

Suspension Rear

SuspensionSuspensionSwing armSuspensionSwing arm
Shock absorberShock absorberMonoshockShock absorberMonoshock
TravelTravel130 mmTravel140 mm
AdjustmentAdjustmentPreload, ReboundAdjustmentPreload, Rebound
MaterialMaterialAluminiumMaterialAluminium

Chassis

FrameFrameAluminiumFrameSteel
Frame typeFrame typeLoad-bearing engineFrame typeDouble cradle
TrailTrail104.6 mmTrail110 mm

Brakes Front

TypeTypeDouble diskTypeDouble disk
DiameterDiameter320 mmDiameter300 mm
PistonPistonFour pistonsPistonFour pistons
TechnologyTechnologyradialTechnologyPetal
BrandBrandBremboBrandBrembo

Brakes Rear

TypeTypeDiscTypeDisc
DiameterDiameter220 mmDiameter250 mm
PistonPistonDouble pistonPistonSingle 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, Ride by Wire, Shift assistant with blipper, Cruise control, 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
LengthLength1,995 mmLength2,065 mm
WidthWidth745 mmWidth830 mm
WheelbaseWheelbase1,370 mmWheelbase1,450 mm
Seat HeightSeat Height820 mmSeat Height830 mm
Fuel Tank CapacityFuel Tank Capacity15 lFuel Tank Capacity17 l
License compliancyLicense compliancyALicense compliancyA

Equipment

EquipmentEquipmentLED-HeadlightsEquipmentLED daytime running lights, LED-Headlights, TFT display, USB-C socket

Pros and Cons in comparison

Pros and Cons in comparison

Aprilia RS 660 Extrema 2024

Aprilia RS 660 Extrema 2024

Unfortunately, our editors did not test this model.

Kawasaki Z900 SE 2025

Kawasaki Z900 SE 2025

The Kawasaki Z900 SE is the naked bike for those who don't want to experiment. It is a fantastic package that you can buy without hesitation and be satisfied with. All in all, it delivers a total work of art that is almost disturbingly perfect in its balance. It does nothing wrong, but it doesn't do anything spectacularly well either. It is the naked bike that simply works - in every situation, for every type of rider, on every road. And perhaps that is exactly what the world needs in an age of over-enthusiastic supersports and electronically supercharged hypernakeds: a bike that simply rides. And it rides damn well.

Balanced overall package

Sensational quickshifter

Excellent ABS control

Very good engine modulation

Stable and neutral riding performance

Öhlins suspension with excellent comfort

Accessible handling for different rider types

Handlebars too narrow

lack of character due to sterile balance

sound could be more charismatic

Price Comparison Avarage Market Price Aprilia RS 660 Extrema vs Kawasaki Z900 SE

Price Aprilia RS 660 Extrema

Model year
Current average market prices

Price Kawasaki Z900 SE

Model year
Current average market prices

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