The ST3 is an Italian sport touring motorcycle that was made by Ducati between 2004 and 2007.

The Ducati ST3 used the liquid cooled Desmotre (three valve desmodromic valve

Desmodromic valve

A desmodromic valve is a reciprocating engine valve that is positively closed by a cam and leverage system, rather than by a more conventional spring...

) engine. The design was aimed at meeting anti-pollution limits. It is a trellis framed sports tourer with a protective fairing, and colour matched pannier

Pannier

A pannier is a basket, bag, box, or similar container, carried in pairs either slung over the back of a beast of burden, or attached to the sides of a bicycle or motorcycle. The term derives from the Old French, from Classical Latin, word for bread basket....

s.

The Desmotre bottom end was derived from the 1000 DS Desmodue, with the water pump in the alternator cover.

Specifications

Engine

• Layout: Transverse, liquid-cooled 90° L-twin, chain-driven DOHC, desmodromic 3V, 992 cc.
• Bore x stroke: 94 millimetre
• Valves:
  • Intake: 34 mm, 2 per cylinder
  • Exhaust: 40 mm, 1 per cylinder
• Compression ratio: 11.3:1.
• Power:
  • 2004 only: 75 kW (102 PS) @ 8,750 rpm.
  • 2005-2007: 78.8 kW (107 PS) @ 8,750 rpm.
• Torque:
  • 2004 only: 93 N·m (9.5 kgf·m) @ 7,250 rpm.
  • 2005-2007: 98.1 N·m (10 kgf·m) @ 7,250 rpm.
• Induction: Marelli electronic fuel-injection with two 50 mm throttle bodies.
• Ignition: Electronic, two spark plugs per cylinder.
• Exhaust:
  • 2004-2005: 2 aluminum mufflers with catalytic converter.
  • 2006-2007: 2 aluminum mufflers with catalytic converter and lambda sensor.
• Emissions:
  • 2004-2005: Euro 2
  • 2006: Euro 3 (except North American version)
  • 2007: Euro 3 (except USA version)
• Starting: Electric with anti-theft immobilizer
  Immobiliser
  An immobiliser or immobilizer is an electronic device fitted to an automobile which prevents the engine from running unless the correct key is present...
  
   system using chip embedded in key.
• Instruments: Electronic instrument panel using CAN communication protocol with CPU: multifunctional digital display (including speedometer, clock, oil/water temperature, fuel gauge, instant/average consumption, consumed fuel), analog rev counter, self-adjusting illumination (depending on outdoor light).

Transmission

• Six-speed gearbox with chain final drive.
  • Gear ratios: 1st 37:15, 2nd 30:17, 3rd 27:20, 4th 24:22, 5th 23:24, 6th 24:28.
  • Primary drive ratio: 1.84:1.
  • Final drive ratio: front sprocket 15 T, rear sprocket 42 T.
• Clutch:
  • 2004 only: Dry multiplate with hydraulic control
  • 2005-2007: Hydraulically actuated wet multiplate clutch.

Chassis and suspension

• Frame: Tubular steel trellis
• Wheelbase: 1,430 mm (56.3 in)
• Seat height: 820 mm (32.3 in)
• Weight:
  • 2004: 214 kg (467 lb) including battery, lubricants and cooling liquid.
  • 2005-2006 non-ABS models: 203 kg (447 lb) excludes battery, lubricants and cooling liquid.
  • 2006-2007 ABS models: 204 kg (449 lb) excludes battery, lubricants and cooling liquid.
  • 2007 non-ABS model: 201 kg (443 lb) excludes battery, lubricants and cooling liquid.
• Rake: 24°
• Suspension:
  • Front:
    • 2004-2007 non-ABS models: 43 mm Showa
      Showa Corporation
      is a manufacturer of high-performance automotive, motorcycle and outboard suspension systems based in Gyoda, Saitama in Japan.Founded in October 1938 in Japan's drive to develop its military capability in preparation for World War II, Showa supplied aircraft suspension and landing systems to...
      
       inverted cartridge forks, adjustable for preload
    • 2006-2007 ABS models: 43 mm Showa
      Showa Corporation
      is a manufacturer of high-performance automotive, motorcycle and outboard suspension systems based in Gyoda, Saitama in Japan.Founded in October 1938 in Japan's drive to develop its military capability in preparation for World War II, Showa supplied aircraft suspension and landing systems to...
      
       inverted cartridge forks, TiN-coated
      Titanium nitride
      Titanium nitride is an extremely hard ceramic material, often used as a coating on titanium alloys, steel, carbide, and aluminium components to improve the substrate's surface properties....
      
      , adjustable for preload, compression and rebound damping.
  • Rear:
    • 2004-2007 non-ABS models: Sachs
      Sachs
      Sachs is a German surname meaning "man from Saxony" and may refer to:Real people*Albie Sachs , a South African Constitutional Court Justice*Andrew Sachs , a German-British actor*Bernard Sachs , an American neurologist...
      
       monoshock adjustable for preload, compression and rebound damping.
    • 2006-2007 ABS models: Öhlins
      Öhlins
      Öhlins or Öhlins Racing AB, is a manufacturer of high-performance suspension systems for automotive, motorcycle, snowmobile, and ATV use. It is based in Upplands Väsby just north of Stockholm, Sweden...
      
      monoshock adjustable for preload, compression and rebound damping.

Wheels, brakes and tires

• Wheels:
  • Front:
    • 2004-2007 non-ABS models: 3-spoke light alloy, 3.5 in x 17 in.
    • 2006-2007 ABS models: 5-spoke light alloy, 3.5 in x 17 in.
  • Rear:
    • 2004-2007 non-ABS models: 3-spoke light alloy, 5.5 in x 17 in
    • 2006-2007 ABS models: 5-spoke light alloy, 5.5 in x 17 in
• Tyres:
  • Front: 120/70 ZR17 tubeless
  • Rear: 180/55 ZR17 tubeless
• Brakes:
  • Front: 2 x 320 mm semi-floating discs, Brembo four-piston piston calipers. ABS controlled braking on 2006-2007 ABS models.
  • Rear: 1 x 245 mm disc, Brembo two-piston caliper. ABS controlled braking on 2006-2007 ABS models.