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New Desmo450

Desmo450 engine, the first Desmo in motocross.

A 449.6 cc four-stroke single-cylinder with desmodromic system, chain-driven four-valve DOHC, and magnesium alternator, head and clutch covers.

The Desmo advantage: higher rpm, higher acceleration

The Desmo450 MX engine is a 449.6 cc four-stroke single-cylinder with desmodromic system, chain-driven four-valve DOHC, and magnesium alternator, head and clutch covers. Thanks to desmodromic timing, the Desmo450 engine can achieve 11,900 rpm, ensuring greater acceleration and more efficient drive out of the gate. Without the spring of traditional timing systems, the desmodromic system allows for greater control and reduces friction loss, maximizing race performance. More revs, more power, and more chance to grab the holeshot. In fact, the Desmo450 MX snatched two out of two holeshots on its debut in the MXGP championship.

A wide torque curve to be exploited at all engine speeds

The Desmo450 offers a wide, well-distributed torque curve to ensure drive is always available, even at low rpm. This means greater traction out of the turns and less fatigue for the rider. Desmodromic timing reduces mechanical losses and allows for more extreme cam profiles, to optimize combustion. The desmodromic system also affords the management of greater valve acceleration, allowing for higher engine speeds than traditional systems and thus allowing for the definition of more extreme cam profiles with the same valve diameter, for a torque curve that is wider and more sustained.

The power of the Desmo450 single-cylinder

The Desmo450 engine delivers maximum power of 63.5 hp at 9400 rpm and maximum torque of 53.5 Nm at 7,500 rpm. The limiter is set at 11,900 rpm, setting a new reference for the category. To ensure consistent performance even in the most extreme conditions, the engine is equipped with rhomboid radiators with a 6.5% larger surface with respect to conventional designs. This ensures more efficient cooling, improving performance reliability and consistency without compromising the rider’s freedom of movement.

Desmodromic timing: efficiency and reliability

The bore and stroke measurements are, respectively, 96 x 62.1 mm, selected to achieve the ideal valve diameter. The intake valves are in titanium and have a diameter of 40 mm, while the 33 mm exhaust valves are in hollow-stemmed steel and filled with sodium to improve heat exchange. The chain tensioner is hydraulic, to offer more precise and consistent action over time with respect to a conventional mechanical system. 

Four-valve DOHC

The Desmo450 uses a DOHC (Dual Overhead Camshaft) configuration with four valves for optimum air flow and combustion management. This guarantees an immediate throttle response and more efficient combustion, improving power delivery at all engine speeds. Power is managed by a Mikuni 44 mm throttle body, designed for a precise, direct response, while the steel and aluminium exhaust system with resonator guarantees maximum performance, while conforming with 2025 FIM/FMI international racing regulations (109dB + tolerance of 2 dB).

Service intervals

The reliability tests have the official Ducati riders as a reference and all the service intervals are based on their usage, to guarantee maximum reliability for both amateurs and professional riders. Despite this, the service intervals set a benchmark for the category. Piston replacement and the valve clearance check are set at 45 hours, while a full engine service is to be carried out at 90 hours.

To make maintenance operations quicker and easier, the covers (alternator, clutch, head) do not use tricomponent putty as a seal but rather a gasket, in metal for the head and in rubber for the alternator and clutch.

Noise emissions

Complete with resonator and made from a blend of steel and aluminium, the exhaust respects the 2025 FIM/FMI regulation dictating that exhaust noise cannot exceed 109 dB with a tolerance of 2 dB.

Desmo450 MX
Displacement
449.6 cc
Power
63.5 hp (46.7 kW) @ 9,400 rpm
Torque
39.5 lb-ft (53.5 Nm ) @ 7,500 rpm
Wet weight no fuel
231 lb (104.8 kg)
Seat Height
38.2 in (970 mm)
Maintenance service intervals
Oil and oil filter service 15 hours
Piston replacement 45 hours
Valve clearance check 45 hours
Main engine service 90 hours
tech spec

Desmo450 MX
Engine
Type Desmo450, single cylinder, Desmodromic timing system 4 valves DOHC, hydraulic tensioner, semi dry sump, liquid cooled
Displacement 449.6 cc
Bore x Stroke 96 mm x 62.1 mm
Compression Ratio 13,5:1
Power 63.5 hp (46.7 kW) @ 9,400 rpm
Torque 39.5 lb-ft (53.5 Nm ) @ 7,500 rpm
Fuel Injection Keihin injector, Mikuni throttle body Ø 44 mm
Exhaust Steel muffler with aluminum outer sleeve. Steel header with resonator
Transmission
Gearbox 5 gears with Quick Shift only up
Primary drive Straight cut gears; Ratio 2.45:1
Ratio 1=31/15, 2=30/18, 3=28/20, 4=26/22, 5=24/24
Final drive Chain DID DMS 520 , Front sprocket Z13, Rear sprocket Z49
Clutch Multiplate clutch with hydraulic control
Chassis
Frame Aluminum welded, with cast, forged and extruded parts.
Front suspension Showa upside down front fork Ø 49 mm fully adjustable. Outer tube with Kashima coating
Front Wheel Central spoked wheel, Takasago Excel rim 1.6'' x 21''
Front Tire Pirelli Scorpion MX32 Mid-Soft 80/100 R21''
Rear suspension Showa mono shock, fully adjustable
Rear Wheel Central spoked wheel, Takasago Excel rim 2.15'' x 19''
Rear Tire Pirelli Scorpion MX32 Mid-Soft 110/90 R19
Wheel Travel (Front/Rear) 12.2 in / 11.6 in (310 mm / 301 mm)
Front Brake Galfer Ø 10.2" single disc, Brembo 2 piston floating caliper
Rear Brake Galfer Ø 9.44"
Instrumentation Hourmeter
Dimensions and Weights
Wet weight no fuel 231 lb (104.8 kg)
Seat Height 38.2 in (970 mm)
Wheelbase 58.8 in (1,494 mm)
Rake 27.3 °
Trail 4.65 in (118.4 mm)
Fuel Tank Capacity 1.9 US gal (7.2 l)
Number of Seats 1
Equipment
Safety Equipment Riding Modes, Ducati Traction Control (DTC), Engine Brake Control (EBC), Hourmeter, Ducati Fall Detection
Standard Equipment Lithium-ion battery, Quick adjustment buttons, Quick shift up, Power launch
Ready for Wi-Fi module and X-Link App
Warranty
Warranty Ducati Conventional Warranty: 3 months or 20 hours of use
Maintenance service intervals Oil and oil filter service 15 hours
Piston replacement 45 hours
Valve clearance check 45 hours
Main engine service 90 hours
Emissions and Consumption
Notes Bike specifications and equipment may vary from market to market. Please refer to your local dealer for further information

Desmo450 MX

Desmo 450 MX

Born to compete, developed on the racetrack. The Desmo450 MX is the first Ducati motocross bike, designed to bring Borgo Panigale racing DNA to the dirt. Are you ready for it?

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