Aprilia RS 660 2025 vs. QJ Motor SRK 921 RR 2026

Aprilia RS 660 2025

Aprilia RS 660 2025

QJ Motor SRK 921 RR 2026

QJ Motor SRK 921 RR 2026

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Technical Specifications Aprilia RS 660 2025 compared to QJ Motor SRK 921 RR 2026

Aprilia RS 660 2025
QJ Motor SRK 921 RR 2026

Engine and Drive Train

Engine typeEngine typeIn line crankpin offsetEngine typeIn line
Engine powerEngine power105 HPEngine power129.2 HP
Rpm at Max. PowerRpm at Max. Power10,500 rpmRpm at Max. Power10,000 rpm
TorqueTorque67 NmTorque93 Nm
Rpm at TorqueRpm at Torque8,500 rpmRpm at Torque8,000 rpm
Compression RatioCompression Ratio13.5 Compression Ratio13
Fuel systemFuel systemInjectionFuel systemInjection
StarterStarterElectricStarterElectric
TransmissionTransmissionChainTransmissionChain
Transmission TypeTransmission TypeGearshiftTransmission TypeGearshift
Number of gearsNumber of gears6Number of gears6
CylindersCylinders2Cylinders4
StrokesStrokes4-StrokeStrokes4-Stroke
Valves per cylinderValves per cylinder4Valves per cylinder4
CoolingCoolingliquidCoolingliquid
DisplacementDisplacement659 ccmDisplacement921 ccm

Suspension Front

Front suspensionFront suspensionUpside-Down telescopic forkFront suspensionUpside-Down telescopic fork
DiameterDiameter41 mmDiameter58 mm

Suspension Rear

SuspensionSuspensionSwing armSuspensionSingle swing arm
Shock absorberShock absorberMonoshockShock absorberMonoshock

Chassis

FrameFrameAluminiumFrameSteel
Frame typeFrame typeLoad-bearing engineFrame typeTubular
RakeRake65.9 degreeRake24 degree
TrailTrail104.6 mmTrail95 mm

Brakes Front

TypeTypeDouble diskTypeDouble disk
DiameterDiameter320 mmDiameter320 mm
PistonPistonFour pistonsPistonFour pistons
BrandBrandBremboBrandBrembo

Brakes Rear

TypeTypeDiscTypeDisc
DiameterDiameter220 mmDiameter260 mm
PistonPistonDouble pistonPistonSingle piston
BrandBrandBremboBrandBrembo

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, Steering damper, Modern electronics

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 width190 mm
Rear tyre heightRear tyre height55 %Rear tyre height50 %
Rear tyre diameterRear tyre diameter17 inchRear tyre diameter17 inch
LengthLength1,995 mmLength2,085 mm
WidthWidth745 mmWidth790 mm
HeightHeight1,150 mmHeight1,130 mm
WheelbaseWheelbase1,370 mmWheelbase1,425 mm
Seat HeightSeat Height820 mmSeat Height835 mm
Kerb Weight (with ABS)Kerb Weight (with ABS)183 kgKerb Weight (with ABS)215 kg
Fuel Tank CapacityFuel Tank Capacity15 lFuel Tank Capacity16 l

Equipment

EquipmentEquipmentLED-HeadlightsEquipmentBluetooth, Connectivity, LED-Headlights, TFT display, USB socket, Integrated navigation system, Modern electronics, Charging & power, Connectivity, Lighting

Pros and Cons in comparison

Pros and Cons in comparison

Aprilia RS 660 2025

Aprilia RS 660 2025

Unfortunately, our editors did not test this model.

QJ Motor SRK 921 RR 2026

QJ Motor SRK 921 RR 2026

All in all, the QJ Motor SRK 921 RR is a serious alternative in the mid-range supersport segment. It combines sophisticated hardware with a stable chassis design and a linear, powerful engine on a par with the competition. Minor weaknesses such as constant ride judder or the somewhat impractical operating logic for the riding modes only slightly spoil the picture, especially as QJ is known as a manufacturer for making improvements quickly. Anyone looking for a bike with substance, confidence and an emotional sound will find a coherent overall package that is much closer to the established top dogs than you would expect.

great sound

single swing arm and MV Agusta technology and looks at a bargain price

high-quality components

good electronics tuning

good features

impeccable workmanship

not a lightweight at 230.5 kilograms

slight constant jolting

somewhat impractical menu navigation

Price Comparison Avarage Market Price Aprilia RS 660 vs QJ Motor SRK 921 RR

Price Aprilia RS 660

Model year
Current average market prices

Price QJ Motor SRK 921 RR

Model year
Current average market prices

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