Motorcycle Segment:
Sport Touring
Key Competitors Era:
Honda VFR750F/VFR800F, Yamaha TDM850/900, Kawasaki GTR1000, BMW R1100RS
Sport Touring Blend:
Combines Ducati's performance heritage with a more comfortable, longer-distance riding capability.
Engine Heritage:
Utilizes the desmodromic valve actuation system characteristic of Ducati V-twin engines.
Diy Support:
Enables DIY enthusiasts and mechanics to perform a wide range of maintenance and repairs, reducing reliance on specialized workshops.
Manual Scope:
Comprehensive repair and adjustment procedures
Page Count Estimate:
N/A (typical for digital/factory documentation, often hundreds of pages)
Manual Type:
Factory Service Repair Manual
Language:
English (typically, based on common Ducati documentation)
Format:
Digital (likely PDF or similar, inferred from 'easy to read reference book' and common industry practice for factory manuals)
Engine Systems:
Engine disassembly, assembly, inspection, tuning, cooling system, lubrication system, fuel injection, ignition system
Drivetrain Systems:
Clutch, gearbox, final drive (chain/sprockets), shift mechanism
Chassis Systems:
Frame, front suspension (forks), rear suspension (shock absorber, linkage), steering, wheels, tires
Braking Systems:
Front and rear brake calipers, master cylinders, brake lines, bleeding procedures, pad replacement
Electrical Systems:
Wiring diagrams, battery, charging system (alternator, regulator/rectifier), starting system, lighting, instruments, ECU, sensors
Bodywork And Trim:
Fairings, seat, fuel tank, fasteners, aesthetic components
Maintenance Procedures:
Oil changes, filter replacements, chain adjustment, spark plug replacement, air filter cleaning/replacement, valve clearance checks/adjustments
Repair Procedures:
Engine rebuild, transmission overhaul, suspension component replacement, brake system repair, electrical component troubleshooting and replacement
Troubleshooting Guides:
Diagnostic procedures for common faults and performance issues
Installation Removal:
Detailed instructions for removing and reinstalling all major components and sub-assemblies
Depth Of Coverage:
Comprehensive: Covers from basic maintenance to complete engine and gearbox rebuilds, including detailed torque specifications and clearances.
Digital File Type:
Likely PDF (Searchable text, layered diagrams are common in factory manuals)
Print Quality Expectation:
High (Factory manuals typically feature clear diagrams, schematics, and high-resolution images)
Binding Type:
N/A (If digital, not applicable; if printed, typically professional saddle-stitch or perfect bound)
Paper Type Expectation:
Durable, matte finish paper (If printed, designed for workshop use)
Engine Type:
Liquid-cooled, 90-degree L-twin (Desmodromic 4-valve per cylinder)
Displacement:
916 cc (exact displacement for the ST4 variant derived from the 916)
Bore X Stroke:
94 mm x 66 mm (typical for this engine family)
Compression Ratio:
10.0:1 (typical)
Horsepower:
Approx. 105-110 HP @ 8500 RPM (estimated for the ST4 variant)
Torque:
Approx. 9.5 - 9.8 kgm (83-86 Nm) @ 6500 RPM (estimated)
Fuel Delivery:
Fuel Injection (Weber Marelli electronic fuel injection is common)
Ignition:
Electronic Ignition, Dual Spark Plugs per Cylinder
Oil Type:
SAE 10W-40 (or equivalent JASO MA certified motorcycle oil) - Manual will specify exact grades and brands.
Oil Capacity:
Approx. 3.5 - 4.0 Liters (with filter change) - Manual will confirm exact capacity.
Instrumentation:
Analog tachometer and speedometer, LCD display for odometer, trip meter, coolant temperature.
Traction Control:
N/A (Traction control was not a feature on this model year).
Connectivity Features:
N/A (No integrated Bluetooth or smart device connectivity).
Oil Change Interval:
Every 6,000 km (3,700 miles) or 12 months, whichever comes first.
Major Service Interval:
12,000 km (7,500 miles) for valve clearance checks and timing belt replacement.
Coolant Type:
Ethylene glycol based antifreeze mixture (e.g., Shellcool RTU or equivalent).
Brake Fluid Type:
DOT 4 (or DOT 5.1 for improved performance/temperature resistance, manual confirmation required).
Timing Belt Wear:
Regular replacement of timing belts is critical to prevent catastrophic engine damage. Intervals are usually 12,000 km or 2 years.
Electrical Connections:
Corrosion or looseness in electrical connectors, particularly the main harness and grounds, can lead to intermittent issues.
Regulator Rectifier:
Early Ducati models could be susceptible to regulator/rectifier failure, impacting charging system performance.
Desmo Valve Adjustment:
Requires specialized tools and knowledge for correct adjustment due to the desmodromic system's unique operating principle.
Ducati Legacy:
Ducati's renowned history in motorcycle racing and the creation of iconic V-twin sportbikes.
St Series Origin:
The ST series was Ducati's foray into the sport-touring market, adapting their successful sports bike platforms for greater comfort and practicality.
St4 Positioning:
The ST4 was an evolution of earlier ST models, utilizing the more potent 916 engine, offering a significant performance upgrade.
Production Era:
The 916 ST4 was produced in the late 1990s and early 2000s.
