25 years of Monster

The Monster 821 pays homage to the legacy of the Monster 900, which over 25 years ago revolutionised the motorcycle world, embodying the essence of true naked sport.
Simple and sporty, agile and powerful, the Monster 821 combines perfect performance and ease of riding.

The icon is renewed

The Monster 821 gets an update while remaining faithful to its 100% Monster personality, unique and unlike any other.
The lines are now slim, agile and sporty thanks to the completely redesigned tank and tail, the original silencer and the new headlight, both classic and contemporary at the same time.
Also debuting on the Monster 821 is the TFT colour instrument panel with gear and fuel indicator, while the Ducati Quick Shift is available as an accessory.


Iconic design

The design of the Monster 821 is 100% Monster. The volumes, silhouette, tank and headlight are true to the original lines of the bike born in 1993 but revisited with a modern flair. The iconic and unmistakable tank also comes with a fastening hook, just like the first Monster.

Compact and sporty

The Monster 821 was designed with the aim of creating a slim, simple and sporty motorcycle to highlight the original concept of "sport naked bike". Great attention was paid to the tank, still muscular but now lightweight and modern, and to the tail, compact and sharp in its lines, supported by a new steel trellis frame.

Modern and contemporary

The front headlight of the Monster 821, contemporary and technological, recalls the circular shape that has always characterised the design of each Monster.
The new shape of the silencer recalls the higher displacement Monster and makes the whole back end of the bike sporty and modern.

Ducati Yellow

The Monster 821 shines bright yellow once again, a colour that so many Monsteristas have fallen in love with in the past. The bike is also available in classic Ducati Red and matt black.


The power to excite

Let yourself be carried away by the new Monster 821. By the pure energy that you can feel with every acceleration. By the stability and reactivity that envelop you every time you bank and brake. Sportiness, advanced technology and comfort allow you to enjoy every moment of your ride.

Testastretta 11° engine

Thanks to high maximum power and torque values, fluid delivery and a full torque curve at all speeds, the Monster 821's Testastretta 11° engine can guarantee performance and agility to the rider.

Unmatched handling

The Monster 821's sleek chassis, along with refined ergonomics thanks to adjustable seat and separate rider and passenger footpegs, is the key to a superior level of handling that will thrill any rider, from the novice to the most experienced.

Truly sporty brakes and suspensions

The sporty soul of the Monster 821 is also evident in the powerful Brembo braking system, with two 320 mm discs on the front and M4-32 radial monobloc callipers, and refined suspensions with 43 mm front fork and adjustable shock absorber on the back end.


The pleasure of a safe ride

In perfect harmony with the road, the Monster 821 is capable of conveying pleasant riding sensations, supported by advanced technology and the specially designed ergonomics of this model.

TFT instrument panel

The Monster 821's colour TFT instrument panel guarantees maximum visibility in all conditions, allowing the rider to have all the information needed, including fuel level, current gear, selected Riding Mode, and the ABS and traction control levels.

Ducati Quick Shift (DQS) up/down

Ducati Quick Shift (DQS) from the Panigale is available as an accessory for the Monster 821, allowing for gear changes without the use of the clutch both during downshifting and upshifting. The DQS system ensures more fun in sport riding and offers valuable assistance in city traffic and on winding roads.

Safety in all conditions

The Monster 821 features the Ducati Safety Pack as standard including Bosch ABS and Ducati Traction Control, both adjustable on multiple levels depending on the road conditions and riding style. The Monster 821's advanced electronics also include Riding Modes and Power Modes, ensuring a high level of safety at all times and in all conditions.

Non-stop emotions

The advanced materials and technologies of the Ducati Testastretta 11° engine allow for particularly long maintenance intervals and reduced running costs, calling for an oil change every 15,000 Km (or 12 months) and valve clearance control (Desmo Service) every 30,000 km.

Monster 821

The Monster 821 is available in three huge colours: Ducati Yellow, with black frame and wheels, the classic Ducati Red, with red frame and black wheels and smart Dark Stealth with black frame and wheels.

Contact a dealer
Contact a dealer

Monster 821 technology

  • Engine
  • Chassis
  • Technological outfit
Technical sheet

Testastretta 11°

The Monster 821 is driven by the twin-cylinder Desmodromic Testastretta 11° with a displacement of 821 cm³, designed to be a structural element of the chassis.
The engine of the Monster 821 "breathes" through Ride-by-Wire commanded throttle bodies, is Euro 4 approved and ensures a maximum output of 109 hp (79 kW) with 9,250 rpm and a maximum torque of 8.8 kgm (86 Nm) at 7,750 rpm.
Developed to ensure a delivery of full and progressive torque at every speed, this engine guarantees fun and usability that are within reach of all.
Furthermore, long maintenance intervals calling for the control of valve clearance every 30,000 km make the Monster 821 a reliable and accessible bike.

Power and torque

With tailor-made and optimised exhaust and intake systems, the Testastretta 11° engine delivers a high power output of 109 hp (79 kW) without sacrificing an extremely favourable torque curve that any rider can appreciate.
the torque reaches 85% of its maximum value already at 5000 rpm.
the character of the testastretta 11° is exalted by the choice of the final ratio defined to develop the maximum acceleration and maximum engine response of each gear at every throttle opening.

Anti-hop clutch

The anti-hop wet clutch on the Monster 821 is cable-driven and requires little effort on the lever.
Thanks to a progressive control system, the spring load is automatically increased. The result is a much greater sensitivity of the lever, which guarantees excellent comfort even in the event of frequent gear changes, in city traffic or on long journeys.
When the torque on the wheel has an opposite effect, the same mechanism reduces the pressure on the clutch plates, allowing them to work in the anti-hop sport mode that counteracts the destabilisation of the rear end during aggressive downshifts while always ensuring safety and control.

Tank, seat and tail

Tank and tail have been completely redesigned and give the new Monster 821 a visually agile and slim look while retaining the muscular and aggressive shapes that are key elements of the Monster's DNA.
The 16.5 l tank is common to the Monster 1200 and guarantees a long ride.
The twin-seater tail with a removable passenger seat cover incorporates the number plate holder.
The ergonomics can be adjusted thanks to the seat that can be set to two different heights from the ground (785 mm - 810 mm) so that riders of different stature can always have a correct riding position.
The ergonomics also benefits from rider and passenger footpeg supports, which are separate.

Frame and subframe

The Monster 821 has a structure with a load-bearing engine and the main trellis frame attached to the twin-cylinder heads. The concept is derived from racing and was applied for the first time to a production bike with the Panigale project. This configuration allows for a very compact, lightweight frame, and, thanks to tubes with a large cross-section, also a high torsional rigidity, perfect for bringing out the dynamic qualities of the vehicle.
The double-sided swinging arm of the Monster 821 also guarantees a compact 1480 mm wheelbase.
The rear subframe seat support, also attached directly to the engine, has been redesigned, creating a compact structure intended to also support the new passenger footpeg brackets, separate from those of the rider, to provide greater freedom of movement during sport riding. The attachments for rider and passenger footpegs are made of cast aluminium and are fitted with aluminium footpegs. The rider footpegs are completed with an aluminium heel guard, underlining the sporty soul of the Monster 821.

Brembo braking system

The Monster 821 braking system guarantees high performance and maximum safety in all conditions.
On the front the Brembo radially-mounted, 4-piston, M4-32 monobloc brake callipers with axial master cylinder act on 2 semi-floating 320 mm discs, while the rear 2-piston Brembo calliper works on a 245 mm disc.
The system comes standard with adjustable ABS Bosch 9.1MP.


The Monster 821 is equipped with a 43 mm diameter front fork and a rear monoshock with spring preload adjustment and hydraulic brake extension that utilises progressive linkage by fastening directly to the vertical cylinder on one side and the die-cast aluminium double-sided swinging arm. Thanks to a sustained but comfortable calibration of the suspensions and agile chassis dimensions, the Monster 821 ensures great speed during direction changes and a riding pleasure within everyone's reach.

Tyres and rims

The Monster 821 is equipped with 10-spoke light alloy rims measuring 3.5" x 17" on the front and 5.5" x 17" at the rear, mounting a Pirelli Diablo Rosso™ III 120/70 tyre on the front and 180/55 on the rear.
The rear tyre is dual compound with high percentages of silica providing grip under all conditions, not only on dry surfaces but also on wet, and all of this results in truly sporty handling. The Pirelli Diablo Rosso™ III tyres ensure superior, consistent performance over time because their technical characteristics are long lasting and make them enjoyable and fully usable throughout their life.


The front headlight of the Monster 821 is modern and contemporary, while recalling the circular shapes that have always characterised the front end of the Monster of each generation.
It is also technologically advanced, using a halogen light source with "horseshoe" LED parking lights, a distinctive feature of all Ducati naked bikes.
The rear light is also a LED.

Colour TFT instrument panel

The Monster 821 instrument panel features a colour TFT display with an indicator of the current gear and fuel level.
The display, repositioned to ensure better daytime readability, provides a variety of viewing modes, each designed to show the information that is suited for different situations of use. All modes include the indicator with the current gear.
The Monster 821 instrument panel is also designed to display information from the Ducati Multimedia System (DMS), which allows you to connect a smartphone to the bike through the Bluetooth module available as an accessory and to manage some of its functions through buttons on the handlebars.
The Monster 821 also has a USB socket under the seat for charging devices like smartphones and so on.

Ducati Quick-shift up & down (DQS)

One of the accessories available for the Monster 821 is the Ducati Quick Shift up/down, an electronic system derived from racing that makes it possible to change gears without the use of the clutch and without closing the throttle when shifting up, and shifting down without using the clutch, but only with closed throttle.
The system consists of a bi-directional microswitch integrated into the gearchange lever linkage that, when used, sends a signal to the engine control unit. The system acts differently depending on the direction of the change, integrating advance ignition and injection during the upshift phase, and controlled throttle opening (automatic "blipping") when the gear pedal is pressed in downshift mode. The magnitude and duration of the solutions are implemented in such a way as to ensure maximum fluidity in various riding conditions. In acceleration, the DQS system saves fractions of a second that would otherwise be lost by closing the accelerator and acting on the clutch lever, and increases stability because the time in which there is no power output is reduced. When downshifting during braking, DQS allows the gears to be easily engaged without having to use the clutch, letting the rider concentrate exclusively on braking and cornering manoeuvres. This system not only makes sport riding more enjoyable, but also represents a valuable help in city traffic and winding roads that require frequent gear changes.

Ducati Safety Pack (DSP)

With the Monster 821, performance, riding pleasure and safety are uncompromising.
The Ducati Safety Pack, which guarantees a high level of safety for the rider and the passenger in all driving conditions, integrates ABS 9.1MP with 3 levels and Ducati Traction Control (DTC) with 8 different levels.

Multilevel ABS

To guarantee braking that is both robust and safe, the standard Monster 821 is equipped with ABS Bosch 9.1MP braking system with integrated pressure sensor, an integral part of the Ducati Safety Pack (DSP) that combines the most advanced safety with the best braking performance.
The system guarantees shorter stopping distances, better stability in any condition and can be adjusted to three different settings. Level 1 of the system adapts the ABS to sport performance and does not activate the rear anti-lifting mechanism, while level 2 offers the same configuration but with moderate anti-lifting action. Finally, level 3 corresponds to the maximum degree of activation, ensuring outstanding braking stability and maximum anti-lifting control of the rear end.

Multi-level Ducati Traction Control (DTC)

Ducati Traction Control is an intelligent system that acts as a "filter" between the right hand of the rider and the rear tyre.
Ducati DTC offers the option of choosing between eight profiles or "sensitivity levels", each of which is programmed with a different slip tolerance value, commensurate with progressive riding levels and ranked from one to eight.
When DTC is activated, the control unit analyses the data sent by the rear and front wheel speed sensors, detects the slip value and calculates the type of intervention needed. The intervention is performed with extreme fluidity by electronically inducing a slowdown in engine injection to reduce the torque until rear grip is fully restored.
The DTC can also be disabled by the rider.

Riding Mode

Ducati Riding Mode allows you to choose from three pre-set modes to optimise the vehicle's behaviour based on the rider and the environmental conditions: “Sport”, “Touring” and ”Urban”.
Each Riding Mode is programmed to instantly change the "character" of the engine (Power Mode) and the ABS and DTC intervention levels even while in movement.

Sport Riding Mode

Sport Riding Mode provides 107 hp of maximum power and a delivery with a direct response of the RbW to throttle opening, reduced intervention of the DTC system and level 1 ABS braking efficiency with no rear lift control.

Touring Riding Mode

Touring Riding Mode provides 107 hp of maximum power and a delivery with a progressive response of the RbW to throttle opening, greater intervention of the DTC system and level 2 ABS braking efficiency with moderate rear lift control.

Urban Riding Mode

Urban Riding Mode provides 75 hp of maximum power and a delivery with a progressive response of the RbW to throttle opening, an even greater intervention of the DTC system and level 3 ABS braking efficiency with maximum braking stability and rear lift control.

Custom Riding Mode

The Power Modes and ABS and DTC intervention levels can be set independently of each other to create custom riding modes.


The power/torque values indicated are measured using an engine dynamometer according to homologation regulation and they correspond to the homologated data, as quoted in the Bike Registration Document.
** Only for countries where Euro 4 standard applies.