Ducati ST3

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2006 Ducati ST3
Manufacturer	Ducati
Parent Company	Ducati Motor Holdings, SpA
Predecessor	Ducati ST4
Successor	current
Class	Sports tourer
Engine	L-twin, Double Spark, 3 valves per cylinder, Desmodromic, liquid cooled
Transmission	6-speed
Wheelbase	1430 mm
Seat Height	820 mm
Fuel Capacity	21 L

The Ducati ST3 uses the liquid cooled Desmotre (Three valve desmo) engine which develops 102 hp (76 kW) at 8,750 rpm and 9.5 kgf·m (93 N·m) of torque at 7,250. The design is aimed at meeting anti-pollution limits to be introduced. Otherwise it is a competent trellis framed sports tourer with a protective fairing, and if you wish, colour matched luggage.

The Desmotre bottom end is derived from the 1000 DS Desmodue, with the water pump in the alternator cover. The ST3 engine has two 34 mm intake valves and one 40 mm exhaust valve and an included valve angle of 40°.

[edit] Specifications

• Bore x stroke: 94 x 71.5.
• Compression ratio: 11.3:1.
• Power: 75 kW at 8750 rpm.
• Torque: 93 N·m at 7250 rpm.
• Induction: Marelli electronic fuel-injection with two 50 mm throttle bodies.
• Ignition: Electronic, two spark plugs per cylinder.
• Starting: Electric.
• Clutch: Hydraulically actuated dry multiplate clutch.
• Transmission: Six-speed gearbox with chain final drive.
• Suspension: 43 mm Showa inverted cartridge forks at front, adjustable for preload, Sachs monoshock adjustable for preload, compression and rebound damping at rear.
• Brakes: Twin 320 mm discs with Brembo four-pot opposed piston callipers at front, 245 mm disc with Brembo twin-pot opposed piston calliper at rear.
• Tyres:
  • Front: 120/70 ZR17 tubeless.
  • Rear: 180/55 ZR17 tubeless.