Segment:
High-performance Italian motorcycle, classic sportbike
Target Enthusiast:
Motorcycle collectors, vintage Ducati enthusiasts, riders seeking classic performance and style.
Competitors Era:
BMW R90S, Moto Guzzi V7 Sport, Triumph Bonneville T140, Honda CB750 Four (though different character).
Desmodromic Valve Actuation:
Unique Ducati feature ensuring precise valve control at high RPMs, requiring specialized adjustment procedures.
Styling:
Iconic Italian sportbike design, often featuring clip-on handlebars, a fuel tank suitable for aggressive riding, and a sculpted seat.
Engine Character:
Torquey V-twin providing strong mid-range power, characteristic Ducati sound.
Engine Systems:
Engine disassembly, assembly, inspection, tuning, valve adjustment (Desmodromic), cylinder heads, pistons, crankshaft, camshafts, lubrication system, cooling system (air-cooled aspects).
Fuel System:
Carburetor identification, adjustment, and overhaul (likely Dell'Orto or similar), fuel lines, fuel pump (if applicable).
Ignition System:
Ignition timing, points, condenser, spark plugs, coils, CDI unit (if applicable).
Transmission System:
Gearbox disassembly, assembly, inspection, clutch operation and service, gear selection mechanisms, transmission fluid specifications.
Chassis And Suspension:
Frame inspection and repair, front fork (Marzocchi, Paioli, or similar) overhaul, rear shock absorber service and adjustment, swingarm, bearings.
Braking System:
Brake caliper service, master cylinder overhaul, brake fluid specifications, brake line inspection, disc brake maintenance.
Electrical System:
Wiring diagrams, lighting system, battery, charging system (alternator/stator, regulator/rectifier), starter motor, switches, instrument panel.
Bodywork And Trim:
Fairing removal and installation, seat, fuel tank, fenders, levers, cables.
Maintenance Procedures:
Routine servicing, oil changes, filter replacements, chain adjustment, spark plug replacement, brake adjustments, lubrication points.
Repair Procedures:
Engine rebuilds, transmission overhauls, carburetor tuning, electrical system diagnostics and repair, suspension component replacement, brake system servicing.
Troubleshooting:
Diagnostic flowcharts, common problem identification and solutions for engine, electrical, and mechanical issues.
Disassembly And Assembly:
Step-by-step instructions for dismantling and reassembling all major components and systems.
Check And Adjustment:
Procedures for checking clearances, tensions, pressures, and making precise adjustments.
Depth:
Comprehensive, covering basic maintenance to full engine and transmission rebuilds. Includes detailed specifications and diagnostic information.
File Type:
Digital (likely PDF), potentially printable
Searchability:
Likely text-searchable if digital PDF
Image Quality:
Expected to be clear line drawings and diagrams, with some photographic examples possible depending on original manual.
Print Type:
Likely original factory print or high-quality reproduction
Binding:
If printed, likely saddle-stitched or perfect bound
Paper Quality:
Typically on durable paper stock to withstand workshop use
Engine Code:
Likely variations of the 906M or similar series for the 860cc engine.
Bore X Stroke Mm:
Approx. 88mm x 72mm (typical for this displacement V-twin)
Compression Ratio:
Typically around 9.0:1 to 9.5:1
Valve Train:
Desmodromic, 2 valves per cylinder, pushrod actuated (OHC)
Horsepower Hp:
Around 65-70 HP (factory estimate, actual may vary)
Torque Lb-Ft:
Around 50-55 lb-ft (factory estimate, actual may vary)
Carburetors:
Dual Dell'Orto PHM 40 or similar
Fuel Type:
Unleaded gasoline (likely 95 RON or higher)
Fuel Delivery:
Gravity feed from tank via fuel lines
Oil Capacity Liters:
Approx. 2.5 - 3.0 Liters (check manual for exact)
Oil Type:
Motorcycle specific multi-grade oil, e.g., SAE 20W-50 or 10W-40 (API SG or higher, verify manual)
Crash Test Ratings:
N/A (Motorcycle, not tested by standard automotive bodies)
Braking System:
Dual front disc brakes, single rear disc brake (specific caliper and disc sizes vary by sub-model and year).
Suspension:
Telescopic front forks, twin rear shock absorbers providing damping and ride height adjustment.
Lighting:
Headlight, taillight, brake light, turn signals (depending on market regulations).
Oil Change Interval Km:
Approximately every 3,000-5,000 km or annually (verify manual).
Desmo Valve Adjustment Interval Km:
Every 6,000-10,000 km (critical procedure, requires specialized tools and knowledge).
Carburetor Sync Interval Km:
As needed, typically every 5,000-10,000 km for optimal performance.
Chain Lubrication And Adjustment:
Every 500-1,000 km or after riding in wet conditions.
Brake Fluid Type:
DOT 4 or DOT 5.1 (verify manual, ensure compatibility with seals).
Fork Oil Type:
Motorcycle fork oil, viscosity typically SAE 10W or 15W (verify manual for specific type and level).
Desmo Valve Adjustment Complexity:
Requires precise adjustment of both opening and closing rockers, critical for engine health and performance.
Electrical Gremlins:
Aging wiring harnesses and connections can lead to intermittent faults.
Carburetor Tuning:
Sensitive to ambient conditions, requires diligent tuning for smooth operation.
Oil Leaks:
Common on older bikes, particularly around engine case seals and rocker covers if not properly maintained.
Brand Origin:
Italy, founded in 1926 by Antonio Ducati.
Sporting Success:
Renowned for its racing heritage, particularly in MotoGP and World Superbike.
Predecessors:
Ducati 750 GT, 750 Sport, 860 GT.
Successors:
Ducati Pantah, 750 F1 series, and later the Monster and Superbike ranges.
Production Years:
The Darmah series, including the 900SD, was produced from approximately 1977 to 1981.
Manufacturing Location:
Bologna, Italy
