Kawasaki Z900 RS 2021 vs. Kawasaki Z650 2023

Kawasaki Z900 RS 2021

Kawasaki Z900 RS 2021

Kawasaki Z650 2023

Kawasaki Z650 2023

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Overview - Kawasaki Z900 RS 2021 vs Kawasaki Z650 2023

The Kawasaki Z900 RS 2021 and the Kawasaki Z650 2023 are both naked bikes from Kawasaki, but they have some key differences in terms of their technical specifications and strengths.

Starting with the Kawasaki Z900 RS 2021, it is equipped with a powerful in-line 4-cylinder engine that produces 111 HP and 98.6 Nm of torque. This engine is paired with a fuel injection system and has a displacement of 948cc. The bike features a steel tubular frame, providing stability and durability. It also comes with advanced rider assistance systems such as ABS and traction control. The suspension consists of an upside-down telescopic fork at the front and a swing arm with a monoshock at the rear, both of which can be adjusted for preload and rebound. The braking system includes double disk brakes with four pistons at the front. The Z900 RS has a wheelbase of 1470mm, a seat height of 835mm, and a kerb weight of 215kg. It has a fuel tank capacity of 17 liters.

Kawasaki Z900 RS 2021

Kawasaki Z900 RS 2021

The strengths of the Kawasaki Z900 RS 2021 include its authentic and beautiful retro look, which appeals to riders who appreciate classic designs. The bike also offers a very comfortable seating position, making long rides enjoyable. Additionally, it is easy and comfortable to ride, making it suitable for both experienced riders and those new to motorcycling.

On the other hand, the Kawasaki Z650 2023 is equipped with a 2-cylinder engine that produces 68 HP and 65.7 Nm of torque. Like the Z900 RS, it also features a fuel injection system and a liquid-cooled engine. The displacement of the Z650 is 649cc. The bike has a steel tubular frame and comes with ABS and traction control as advanced rider assistance systems. The suspension consists of a telescopic fork at the front and a swing arm with a monoshock at the rear, which can be adjusted for preload. The braking system includes double disk brakes with double pistons at the front. The Z650 has a wheelbase of 1410mm, a seat height of 790mm, and a kerb weight of 187.1kg. It has a fuel tank capacity of 15 liters.

The strengths of the Kawasaki Z650 2023 include its very accessible handling, making it easy to maneuver in various road conditions. The bike has a compact and lightweight appearance, giving riders a sense of confidence, especially for smaller riders. Additionally, the Z650 has adjustable levers, allowing riders to customize their riding experience.

Kawasaki Z650 2023

Kawasaki Z650 2023

However, the Kawasaki Z900 RS 2021 has some weaknesses. It lacks a quickshifter and driving modes, although it does have adjustable traction control. On the other hand, the Kawasaki Z650 2023 also has its weaknesses. It may not provide enough space for tall riders, and its overall appearance may make it look like a smaller bike than its 650cc engine suggests. The engine performance may also be perceived as tame, and the seating position is defensive. Additionally, some riders may find the handlebars too narrow and cranked too much for a naked bike.

In conclusion, the Kawasaki Z900 RS 2021 and the Kawasaki Z650 2023 have their own unique strengths and weaknesses. The Z900 RS offers a powerful engine and a comfortable riding experience with its retro design, while the Z650 provides accessible handling and a compact appearance. Ultimately, the choice between these two bikes will depend on the rider's preferences and priorities.

Technical Specifications Kawasaki Z900 RS 2021 compared to Kawasaki Z650 2023

Kawasaki Z900 RS 2021
Kawasaki Z650 2023

Engine and Drive Train

Engine typeEngine typeIn lineEngine typeIn line
BoreBore73.4 mmBore83 mm
StrokeStroke56 mmStroke60 mm
Engine powerEngine power111 HPEngine power68 HP
Rpm at Max. PowerRpm at Max. Power8,500 rpmRpm at Max. Power8,000 rpm
TorqueTorque98.6 NmTorque65.7 Nm
Rpm at TorqueRpm at Torque6,500 rpmRpm at Torque7,000 rpm
Compression RatioCompression Ratio10.8 Compression Ratio10.8
Fuel systemFuel systemInjectionFuel systemInjection
Throttle BoreThrottle Bore36 mmThrottle Bore36 mm
Clutch TypeClutch TypeMultiplate in oil-bathClutch TypeMultiplate in oil-bath
IgnitionIgnitionDigitalIgnitionDigital
TransmissionTransmissionChainTransmissionChain
Transmission TypeTransmission TypeGearshiftTransmission TypeGearshift
Number of gearsNumber of gears6Number of gears6
CylindersCylinders4Cylinders2
StrokesStrokes4-StrokeStrokes4-Stroke
Valves per cylinderValves per cylinder4Valves per cylinder4
ValvesValvesDOHCValvesDOHC
CoolingCoolingliquidCoolingliquid
DisplacementDisplacement948 ccmDisplacement649 ccm

Suspension Front

Front suspensionFront suspensionUpside-Down telescopic forkFront suspensionTelescopic fork
DiameterDiameter41 mmDiameter41 mm
TravelTravel120 mmTravel125 mm

Suspension Rear

SuspensionSuspensionSwing armSuspensionSwing arm
Shock absorberShock absorberMonoshockShock absorberMonoshock
TravelTravel140 mmTravel130 mm
AdjustmentAdjustmentPreload, ReboundAdjustmentPreload

Chassis

FrameFrameSteelFrameSteel
Frame typeFrame typeTubularFrame typeTubular
RakeRake65 degreeRake65.5 degree
TrailTrail98 mmTrail100 mm

Brakes Front

TypeTypeDouble diskTypeDouble disk
DiameterDiameter300 mmDiameter300 mm
PistonPistonFour pistonsPistonDouble piston
Shock mountShock mountFixed caliperShock mountSemi-Schwimmsattel

Brakes Rear

TypeTypeDiscTypeDisc
DiameterDiameter250 mmDiameter220 mm
PistonPistonSingle pistonPistonSingle piston

Assistance Systems

Advanced Rider Assistance SystemsAdvanced Rider Assistance SystemsABS, Traction controlAdvanced Rider Assistance SystemsABS, 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 width160 mm
Rear tyre heightRear tyre height55 %Rear tyre height60 %
Rear tyre diameterRear tyre diameter17 inchRear tyre diameter17 inch
LengthLength2,100 mmLength2,055 mm
WheelbaseWheelbase1,470 mmWheelbase1,410 mm
Seat HeightSeat Height835 mmSeat Height790 mm
Kerb Weight (with ABS)Kerb Weight (with ABS)215 kgKerb Weight (with ABS)187.1 kg
Fuel Tank CapacityFuel Tank Capacity17 lFuel Tank Capacity15 l
License compliancyLicense compliancyALicense compliancyA

Pros and Cons in comparison

Pros and Cons in comparison

Kawasaki Z900 RS 2021

Kawasaki Z900 RS 2021

A timelessly beautiful motorbike, the Z 900 RS. Its heart, the powerful and silky-smooth four-cylinder, ensures absolute riding pleasure. Even for longer rides, it offers plenty of comfort thanks to its pleasant seating position, well-padded saddle and high, wide handlebars. For those who like retro motorbikes but appreciate modern handling, the Z1 Homage is a very good choice.

authentic, beautiful retro look

very comfortable seating position

easy and comfortable to ride

no quickshifter and no driving modes (but TC adjustable)

Kawasaki Z650 2023

Kawasaki Z650 2023

The Kawasaki Z 650 is probably the most docile motorbike in the naked bike segment. And that is to be understood in an absolutely positive way - as long as you are not particularly tall and heavy. It is slim, light, agile and accessible. All the controls, but also the engine, do not overwhelm. If you are looking for spectacular performance, you should go for the Z 900, but if you are looking for a nimble and easy-to-ride motorbike, you will be satisfied.

Very accessible handling

Very compact and easy to manoeuvre

Motorcycle appears light and compact

Gives small riders a lot of confidence

Adjustable levers

Not enough space on the bike for tall riders

bike looks a class smaller than 650cc overall

engine looks a bit tame

very defensive seating position

handlebars too narrow and cranked too much for a naked bike.

Price Comparison Avarage Market Price Kawasaki Z900 RS vs Kawasaki Z650

There are a few key differences between a Kawasaki Z900 RS 2021 and a Kawasaki Z650 2023. In terms of price, the actual average price of a Kawasaki Z900 RS 2021 is about 55% higher. Compared to Kawasaki Z650 2023 there are less Kawasaki Z900 RS 2021 bikes available on the 1000PS.de Marketplace, specifically 14 compared to 243. It takes less time to sell a Kawasaki Z900 RS with 125 days compared to 146 days for a Kawasaki Z650. Since model year 2018 1000PS.de editors have written 26 reviews for the Kawasaki Z900 RS and 31 reviews for the Kawasaki Z650 since model year 2017. The first review for the Kawasaki Z900 RS was published on 06/09/2017 and now has more than 63,700 views. This compares to more than 25,000 views for the first review on Kawasaki Z650 published on 08/11/2016.

Price Kawasaki Z900 RS

Model year
Current average market prices

Price Kawasaki Z650

Model year
Current average market prices

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