Key performance
Technical specifications
Engine
- Displacement
- 821 cc
- Power
- 109.0 ch @ 9250 tr/min (79.6 kW)
- Torque
- 86.0 Nm @ 7750 tr/min
- Engine type
- V2, four-stroke
- Cooling
- Air
- Compression ratio
- 12.8:1
- Bore × stroke
- 88.0 x 67.5 mm (3.5 x 2.7 inches)
- Valves/cylinder
- 4
- Camshafts
- 2 ACT
- Fuel system
- Injection. 53mm throttle bodies with full Ride by Wire
- Valve timing
- Desmodromic valve control
- Starter
- Electric
Chassis
- Frame
- Tubular steel Trellis frame attached to the cylinders head
- Gearbox
- 6-speed
- Final drive
- Chain (final drive)
- Clutch
- APTC slipper and self-servo wet multiplate clutch with control cable
- Front suspension
- 43mm upside-down forks
- Rear suspension
- Progressive linkage with adjustable monoshock. Aluminium double-sided swingarm
- Front wheel travel
- 130 mm (5.1 inches)
- Rear wheel travel
- 140 mm (5.5 inches)
Brakes
- Front brakes
- Double disc. Semi-floating discs, radially mounted Monobloc Brembo M4-32 callipers, 4-pistons, axiial pump with ABS as standard
- Rear brakes
- Single disc. 2-piston floating calliper with ABS as standard equipment
- Front tyre
- 120/70-ZR17
- Front tyre pressure
- 2.30 bar
- Rear tyre
- 180/55-ZR17
- Rear tyre pressure
- 2.50 bar
Dimensions
- Seat height
- 785.00 mm
- Wheelbase
- 1480.00 mm
- Length
- 2170.00 mm
- Width
- 800.00 mm
- Height
- 1055.00 mm
- Fuel capacity
- 16.50 L
- Weight
- 205.00 kg
- Dry weight
- 180.50 kg
- New price
- 12 250 €
Overview
Ducati has always known how to sell dreams on credit. With the Monster 821 Stealth, the Bolognese brand takes an additional step in the art of making people desire what they don't necessarily need: a version with adjustable suspension of a naked bike that is already convincing. The result? A motorcycle that is less restrained and decidedly more tactical.

The 821 cc L-twin cylinder engine develops 109 horsepower at 9,250 rpm for a torque of 86 Nm available at 7,750 rpm. This engine cannot be summarized by its figures. It has a temperament: grumpy at low speeds, sharp at high speeds, it demands to be worked to deliver the best of itself. This is the charm of Ducati mechanics, and it is precisely what distinguishes the Stealth from a Yamaha MT-09 SP or a Kawasaki Z 900 RS, whose engines are more docile but less characterful. The Ducati Monster 821 Stealth technical specifications state 205 kg fully fueled, which places it in the middle of the segment, with a low seat at 785 mm that reassures riders of intermediate build.
What justifies the nickname "Stealth" is the technical equipment added compared to the standard version. The 43 mm fully adjustable inverted fork replaces the original fixed unit, and the rear monoshock also accepts adjustments. For those who pushed the Monster 821 to its limits and encountered the limits of a fixed suspension, this is a real answer. It is now possible to adapt the damping to your riding style rather than adapting your style to the motorcycle. The small windscreen, the bidirectional shifter, and the dark finish complete the picture of a motorcycle that takes itself seriously without becoming ostentatious.
Electronics are well present, with three riding modes, a three-level ABS, an eight-level traction control, and a color TFT screen. The front Brembo M4-32 radial four-piston calipers do the job with the precision expected from this house. On this point, neither the Suzuki GSX-S 750 nor the Z 900 offer such a level of braking from the factory. This is a solid argument, and it compensates for part of the bill.
Because the Ducati Monster 821 Stealth price, displayed at 12,250 euros, is the real subject of debate. The increase compared to the 821 standard approaches 7%, which places the Stealth in a tense price range, close to more powerful and more versatile motorcycles. The Ducati Monster 821 Stealth 2019 test reveals a consistent and well-built machine, tailored for a demanding rider who wants character without sacrificing the ability to adjust his motorcycle. This is not a beginner's machine; the engine's temperament and the chassis's liveliness assume a certain level of experience. It is a naked for those who have already tamed the category and now want to refine it. Those considering a used Ducati Monster 821 Stealth will likely find the right compromise between price and pleasure, especially if the desire to customize the Ducati Monster 821 Stealth with a Termignoni kit comes to be grafted onto the project. The sound changes everything, and the character of the V-twin is expressed even better freed from its homologation constraints.
Standard equipment
- Assistance au freinage : ABS de série
Practical info
- Véhicule accessible au permis A2 ou bridable à 47.5ch / 35 Kw
- La moto est accessible aux permis : A, A2
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