Segment:
Sport-Touring Motorcycle
Target Audience:
Riders seeking a blend of performance, comfort, and long-distance capability.
Key Competitors:
BMW R1150RT, Honda VFR800 Interceptor, Yamaha FJR1300, Kawasaki GTR1000.
Engine Architecture:
Ducati's signature Desmodromic L-Twin engine, known for its distinctive sound and performance characteristics.
Design Philosophy:
Combines Ducati's sporting heritage with practical touring features, including fairings and comfortable ergonomics.
Engine Components:
Cylinder heads, pistons, crankshaft, connecting rods, valves, timing system, lubrication system components, fuel injection components.
Transmission Components:
Gearbox internals, clutch assembly, primary drive components.
Chassis Components:
Frame sections, swingarm, rear shock absorber, linkage system, steering head components.
Suspension Components:
Front forks (internal components, seals, springs), rear suspension linkage and shock absorber parts.
Braking System Components:
Brake calipers, master cylinders, brake discs, brake lines, associated hardware.
Electrical System Components:
Wiring harnesses, connectors, ignition system parts, lighting components, starter motor, battery mounting hardware.
Fuel System Components:
Fuel tank, fuel pump, fuel injectors, fuel lines, regulators.
Exhaust System Components:
Exhaust headers, catalytic converter (if applicable), mufflers, mounting hardware.
Bodywork And Trim:
Fairings, seat, fuel tank cover, fenders, mirrors, windscreen, decals, fasteners.
Wheels And Tires:
Wheels, spokes, wheel bearings, tires (specifications only, not part numbers), valve stems.
Controls And Indicators:
Handlebars, levers, footpegs, control cables, instrument cluster components.
Assembly Diagrams:
Exploded views of all major assemblies with component part numbers.
Part Number Identification:
Unique Ducati part numbers for every listed component.
Fastener Identification:
Identification of specific bolts, nuts, washers, and other fasteners used in assembly.
Depth:
Detailed breakdown of individual components and their relationships within assemblies, crucial for accurate part sourcing and replacement.
Engine Type:
Four-stroke, L-twin cylinder, Desmodromic valve actuation, 2 valves per cylinder
Bore X Stroke:
94 mm x 68 mm
Compression Ratio:
11.3:1
Horsepower:
93 HP (70 kW) at 8750 rpm
Torque:
83 Nm (61 lb-ft) at 6750 rpm
Fuel Delivery:
Marelli electronic fuel injection
Fuel Type:
Unleaded gasoline, minimum 95 RON
Oil Type:
API SG/SH/SJ or higher, SAE 15W-50 or 20W-50 motorcycle specific oil
Oil Capacity:
3.4 Liters (3.6 US qt) with filter change
Safety Features Note:
Motorcycle safety is primarily determined by rider skill and adherence to safe riding practices. This manual does not cover safety ratings in the automotive sense.
Braking System:
Dual 320 mm discs with 4-piston calipers (front), Single 245 mm disc with 2-piston caliper (rear). ABS was not standard or widely available for this model year.
Lighting:
Halogen headlights, LED tail light.
Chassis Structure:
Trellis frame for rigidity and rider feedback.
Instrument Cluster:
Analog tachometer, digital speedometer, odometer, trip meters, coolant temperature gauge, clock, and warning lights.
ABS Availability:
ABS was not a standard feature on the 2005 ST3.
Connectivity Features:
No integrated smartphone connectivity or advanced electronic rider aids beyond basic engine management.
Oil Change Interval:
Every 7,500 miles (12,000 km) or 12 months.
Desmo Service Interval:
Every 7,500 miles (12,000 km) for valve clearance check/adjustment (critical for Desmodromic engines).
Belt Replacement Interval:
Every 15,000 miles (24,000 km) or 24 months (timing belts).
Coolant Type:
Ethylene glycol based antifreeze/coolant mixture, 50/50 ratio with de-mineralized water.
Brake Fluid:
DOT 4 or DOT 5.1 approved brake fluid.
Clutch Fluid:
DOT 4 or DOT 5.1 approved brake fluid (shared reservoir with brakes).
Desmo Valve Adjustment:
Regular and precise desmodromic valve clearance adjustments are critical for engine longevity and performance. Neglect can lead to severe engine damage.
Fuel Pump Reliability:
Some owners have reported occasional issues with the fuel pump unit over time, particularly with aged units.
Electrical Connections:
As with many motorcycles of this era, ensuring clean and tight electrical connections is important to prevent intermittent issues.
Regulator/Rectifier:
While less common than on some Japanese bikes, stator and regulator/rectifier issues can occur with age.
Heritage:
Ducati, an Italian manufacturer renowned for its performance motorcycles, particularly those with Desmodromic valve systems and trellis frames.
Lineage:
The ST3 replaced the ST2 and bridged the gap between the sportier 916/996 series and the more touring-oriented ST4/ST4S models, offering a balance of V-twin power and comfort.
Key Updates For 2005:
Refinements to fuel injection, potential minor chassis or suspension tweaks depending on regional specifications. The ST3 series was produced from 2004 to 2007.
Manufacturing Location:
Bologna, Italy
