Ducati 860 Service Repair Manual

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🏷️ Basic Information Identification Make: Ducati Model: 860 GT / 860 GTS Generation Production Years: 1974-1977 Codes Engine Codes: Engine type 860 (Desmodromic L-Twin) 👋 Introduction Market Position Motorcycle Segment:...

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类型: Motorcycle

斯库: 603050

标签: 860 Ducati Motorcycle Motorcycles

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Description

🏷️ Basic Information

Identification

Make:

Ducati

Model:

860 GT / 860 GTS

Generation

Production Years:

1974-1977

Codes

Engine Codes:

Engine type 860 (Desmodromic L-Twin)

👋 Introduction

Market Position

Motorcycle Segment:

Large displacement V-twin sport/touring motorcycle.

Era Significance:

Represents a significant step in Ducati's evolution towards its iconic V-twin heritage, bridging the gap from earlier singles and twins.

Competitive Analysis

Key Competitors:

Moto Guzzi V7/V850, BMW R90/6, Honda CB750, Kawasaki Z1.

Key Features

Desmodromic Valve Actuation:

The signature Ducati Desmodromic system, offering precise valve control at high RPM.

Engine Configuration:

Air-cooled, 90-degree L-twin (or 80-degree depending on exact measurement) with bevel gear drive for camshafts.

Design Philosophy:

Styled by Giorgetto Giugiaro, known for its distinctive styling cues of the era.

📋 Manual Details

Coverage Areas

Systems Covered:

Engine, Transmission, Clutch, Electrical System, Fuel System, Ignition System, Braking System, Suspension, Chassis, Frame, Bodywork, Maintenance, Troubleshooting, Specifications

Page Count

Page Count:

Approximately 200-250 pages (typical for this era and complexity)

Manual Type

Manual Type:

Factory Service Manual / Workshop Manual

Language

Language:

English (Primary, may contain supplementary languages depending on source)

Format

Format:

Digital (PDF)

📖 Manual Coverage

Systems Covered

Engine Overhaul:

Complete disassembly, inspection, assembly, and tuning of the L-Twin Desmodromic engine.

Transmission And Clutch:

Gearbox overhaul, clutch service and replacement procedures.

Electrical System Diagnostics:

Wiring diagrams, component testing, troubleshooting ignition and charging systems.

Fuel And Ignition Tuning:

Carburetor adjustment (Dell'Orto PHF/PHM), ignition timing procedures.

Braking And Suspension Servicing:

Front fork (Marzocchi) and rear shock absorber maintenance, brake caliper and master cylinder service.

Procedures Included

Routine Maintenance:

Oil changes, filter replacement, chain adjustment, valve clearance checks (Desmodromic timing).

Troubleshooting Guides:

Step-by-step diagnostic procedures for common starting, running, and electrical issues.

Component Rebuilding:

Detailed instructions for rebuilding engine components, carburetors, and brake systems.

Wiring Diagram Interpretation:

Clear, annotated wiring schematics for electrical system diagnosis.

Technical Depth

Depth Level:

Comprehensive: Covers everything from basic scheduled maintenance to complete engine and chassis rebuilds.

Diagnostic Capabilities:

Advanced diagnostics, including electrical circuit tracing and component testing.

Assembly Precision:

Includes detailed torque specifications, clearances, and assembly sequences critical for Desmodromic engines.

📊 Manual Specifications

File Format

File Type:

Searchability:

Text-searchable for quick information retrieval.

Print Quality:

High-resolution scans suitable for printing individual pages or the entire manual.

Binding Type

Binding Type:

N/A (Digital Format)

Paper Type

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Air-cooled, 4-stroke, L-twin (90-degree cylinder angle)

Displacement:

864 cc

Bore X Stroke:

83 mm x 80 mm

Valve Train:

2 valves per cylinder, Desmodromic actuation

Compression Ratio:

9.3:1 (typical, may vary slightly)

Performance

Horsepower:

Approx. 60-65 hp @ 6500-7000 rpm

Torque:

Approx. 70 Nm (52 lb-ft) @ 5000 rpm

Fuel System

Carburetion:

2 x Dell'Orto PHF 32 (or PHM 32) carburetors

Fuel Type:

Unleaded gasoline (minimum 91 RON)

Lubrication

Oil Capacity:

Approx. 3.5 liters (3.7 US qt)

Oil Type Specification:

SAE 20W-50 API SG or equivalent (refer to manual for exact specification)

🔧 Transmission

Standard

Transmission Type:

5-speed manual gearbox

Final Drive:

Shaft drive

Features

Clutch Type:

Dry, multi-plate clutch

Clutch Operation:

Cable-actuated

📐 Dimensions

Exterior

Length:

Approx. 2130 mm (83.9 in)

Width:

Approx. 780 mm (30.7 in)

Height:

Approx. 1120 mm (44.1 in)

Wheelbase:

Approx. 1460 mm (57.5 in)

Weights

Dry Weight:

Approx. 207 kg (456 lbs)

Wet Weight:

Approx. 225 kg (496 lbs)

Fuel Capacity:

Approx. 18 liters (4.8 US gal)

🛡️ Safety Features

Ratings

Safety Standards Era:

Designed prior to extensive modern motorcycle safety regulations and testing.

Active Features

Braking System Front:

Dual 260 mm discs with hydraulic calipers (typically Grimeca or Brembo)

Braking System Rear:

240 mm disc with hydraulic caliper

Passive Features

Frame Construction:

Double cradle steel tube frame for rigidity.

Lighting:

Halogen headlight, taillight, turn signals as per regulatory standards of the time.

💡 Technology Features

Infotainment

Infotainment System:

N/A - Basic analog instrumentation: Speedometer, Tachometer, Ammeter, Oil Pressure Warning Light, Neutral Indicator.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000-5,000 km (1,800-3,000 miles) or annually.

Desmodromic Valve Check:

Every 6,000-10,000 km (3,700-6,200 miles) - critical for engine health.

Carburetor Sync And Cleaning:

As needed, typically every 10,000-15,000 km (6,200-9,300 miles).

Fluid Specifications

Engine Oil Type:

SAE 20W-50 API SG

Brake Fluid Type:

DOT 3 or DOT 4 (refer to manual for specific recommendation)

Gearbox Oil Type:

SAE 80W-90 API GL-4

Known Issues

Desmodromic Valve Adjustment Complexity:

Requires specialized knowledge and tools for proper adjustment. Incorrect adjustment can lead to poor performance or engine damage.

Electrical Gremlins:

Wiring insulation degradation and connector corrosion are common with age, requiring thorough inspection.

Carburetor Performance:

Dell'Orto carburetors can be finicky and require meticulous tuning and rebuilding for optimal performance.

Fuel Tank Corrosion:

Some older steel tanks may be susceptible to internal corrosion if left unused or improperly stored.

📚 Vehicle History

Brand Heritage

Ducati Legacy:

Ducati's long-standing reputation for performance motorcycles built around the V-twin engine configuration.

Model Evolution

Predecessors:

Evolved from earlier Ducati singles and the 750 series twins, laying groundwork for later 900 models.

Design Influence:

Styled by Giorgetto Giugiaro, influenced by automotive design trends of the mid-1970s.

Production

Manufacturing Origin:

Bologna, Italy

Production Figures:

Limited production numbers, making it a desirable collector's item.

🏆 Awards & Recognition

Recognitions

Automotive Design Awards:

While specific awards for the 860 are scarce, its designer Giorgetto Giugiaro is a recipient of numerous design accolades, and the 860's styling is often cited as a period classic.

Ratings

Performance Reviews:

Critically acclaimed for its performance and handling characteristics within its class, though often noted for its demanding maintenance requirements.

Certifications

Certification Standards:

Compliant with European and relevant market regulations for motorcycles of its production era.