Motorcycle Segment:
Sport-touring / GT Motorcycle
Target Demographic:
Riders seeking a comfortable yet sporty Italian motorcycle for touring and everyday use.
Key Competitors Era:
BMW R80/100GS, Moto Guzzi V50/V65, Honda CBX750F, Kawasaki GPZ600R (segment overlap).
Engine Configuration:
Iconic Ducati desmodromic L-twin (90-degree V-twin) engine, air-cooled.
Desmodromic System:
The defining feature of Ducati engines, ensuring precise valve control without valve float.
Suspension Setup:
Often featured advanced suspension components for its era, contributing to handling.
Styling:
Distinctive Italian styling, characteristic of Ducati's design language.
Manual Type:
Factory Service Repair Manual
Language:
English (typical for factory manuals, may include other languages)
Format:
Digital (PDF, often searchable and printable)
Intended Audience:
Professional Mechanics and DIY Enthusiasts
Engine:
Complete disassembly, assembly, inspection, and repair of the 650cc V-twin engine.
Transmission:
Gearbox removal, inspection, repair, and adjustment procedures for the 5-speed transmission.
Fuel System:
Carburetor service (Dell'Orto PHB 30), fuel tank maintenance, fuel pump operation.
Ignition System:
Ignition timing, spark plug specifications, coil testing, CDI unit troubleshooting.
Electrical System:
Wiring diagrams, lighting system, starter motor, alternator, battery maintenance, fuse identification.
Brakes:
Front and rear brake caliper service, master cylinder overhaul, brake line replacement, fluid bleeding.
Suspension:
Front fork (Marzocchi or Fournales) disassembly, seal replacement, damping adjustment; rear shock absorber inspection and adjustment.
Chassis And Frame:
Frame inspection, steering head bearing service, swingarm maintenance.
Bodywork And Trim:
Fairing removal and installation, seat maintenance, fuel tank removal.
Maintenance:
Regular service tasks, oil changes, filter replacements, chain adjustment, lubrication points.
Troubleshooting:
Diagnostic flowcharts and symptom-based troubleshooting for common issues.
Repair:
Step-by-step instructions for component disassembly, repair, and reassembly.
Installation:
Procedures for installing new or replacement parts and accessories.
Adjustments:
Carburetor synchronization, valve clearance adjustment, clutch and brake lever adjustment.
Diagnostic Capabilities:
Detailed diagnostic procedures for electrical and mechanical systems.
Rebuild Instructions:
Comprehensive instructions for complete engine and transmission rebuilds.
Torque Specifications:
All critical fasteners, including engine, chassis, and suspension components.
Clearances And Tolerances:
Precise measurements for valve clearances, bearing play, and component fitment.
Searchability:
Searchable text content for quick information retrieval.
Printability:
Printable pages for workshop use.
Illustrations:
High-quality diagrams, exploded views, and photographs.
Image Resolution:
High-resolution images suitable for clear visual reference.
Binding Type:
N/A (Digital Format)
Paper Type:
N/A (Digital Format)
Engine Type:
Four-stroke, air-cooled, 90-degree V-twin (L-twin), Desmodromic valve actuation.
Displacement:
648 cc (approximate)
Bore X Stroke:
74 mm x 75 mm (typical for this engine family)
Compression Ratio:
9.0:1 (typical)
Horsepower:
Approximately 50-55 hp @ 7,500 rpm (estimated, varies by year/spec)
Torque:
Approximately 50-55 Nm (estimated, varies by year/spec)
Carburetor Type:
Twin Dell'Orto PHB 30 A or equivalent
Fuel Delivery:
Mechanical fuel pump
Fuel Type:
Unleaded gasoline (RON 95 or higher recommended)
Oil System:
Wet sump lubrication
Oil Capacity:
Approx. 2.5 - 3.0 liters (with filter change)
Cooling Method:
Air-cooled
Transmission Type:
5-speed sequential manual transmission
Clutch Type:
Wet, multi-plate, hydraulically actuated
Gear Ratios:
Specific ratios would be detailed in the manual, typically optimized for touring and mid-range torque.
Length:
Refer to specific model year specifications, generally around 2150-2200 mm.
Width:
Refer to specific model year specifications, generally around 750-800 mm.
Height:
Refer to specific model year specifications, generally around 1200-1250 mm.
Dry Weight:
Approx. 190-200 kg (varies by specification)
Wet Weight:
Approx. 210-220 kg (with fluids)
Fuel Tank Capacity:
Approx. 19-20 Liters
Crash Test Results:
N/A (Motorcycles are not subjected to standardized car crash tests)
Braking System:
Dual front disc brakes, single rear disc brake (typical configuration).
Brake Component Manufacturer:
Brembo or equivalent (common for Ducati).
Lighting:
Halogen headlamp, LED or incandescent tail/brake lights.
Oil Change Interval:
Every 5,000 km or 12 months, whichever comes first.
Valve Clearance Check:
Every 10,000 km or 24 months.
Desmo Service:
Major desmodromic valve service recommended every 20,000 km.
Chain Lubrication Adjustment:
Every 1,000 km and after washing or rain riding.
Engine Oil Type:
API SG or higher, SAE 20W-50 or SAE 15W-50 motorcycle specific oil.
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Clutch Fluid Type:
DOT 4 hydraulic clutch fluid (if hydraulic actuation).
Gearbox Oil Type:
API GL-5, SAE 80W/90 hypoid gear oil.
Electrical Connections:
Corrosion or loosening of electrical connectors can cause intermittent issues.
Carburetor Tuning:
Dell'Orto carburetors can be sensitive to tuning and require regular synchronization.
Desmo Seals:
Wear on desmodromic valve seals can affect valve timing and performance.
Fuel Line Degradation:
Older fuel lines can become brittle and leak.
Brand Origin:
Italy, founded in 1926.
Reputation:
Renowned for performance, racing heritage, distinctive L-twin engines, and desmodromic valve technology.
Alazzurra Context:
The Alazzurra was part of Ducati's lineup in the 1980s, bridging the gap between their sportier models and touring capabilities.
Gt Variant:
The 'GT' designation typically indicates a Grand Tourer variant, implying a focus on comfort and long-distance riding.
Production Years:
Circa 1987-1991 (specific model years may vary slightly).
Manufacturing Location:
Bologna, Italy
Industry Awards:
Specific industry awards for the Alazzurra GT 650 are not widely documented. Ducati models of this era were often praised for their performance and handling in specialist motorcycle publications.
Expert Reviews:
Contemporary reviews highlighted its comfortable riding position, usable powerband, and characteristic Ducati sound and feel.
Certification Standards:
Compliant with relevant European emissions and safety standards of its production era.