Segment:
Cruiser Motorcycle
Target Audience:
Harley Davidson FXB Shovelhead owners, mechanics, and restoration enthusiasts.
Competitors:
Other American V-twin motorcycles of the era (e.g., Indian, custom choppers).
Unique Selling Points:
Iconic Shovelhead engine, classic Harley-Davidson styling, a pivotal model in Harley's history.
Value Proposition:
Essential for maintaining, diagnosing, and repairing the 1980 Harley Davidson FXB Shovelhead, ensuring longevity and proper performance of this classic machine.
Engine:
Detailed overhaul, tuning, lubrication, cooling, ignition, fuel system (carburetor and fuel injection variants if applicable).
Transmission:
Service, repair, maintenance, fluid specifications, internal components.
Drivetrain:
Primary drive, final drive, clutch operation and service.
Chassis And Frame:
Frame inspection, steering head bearing service, suspension adjustment and repair (forks and rear shocks).
Braking System:
Front and rear brake caliper service, master cylinder overhaul, bleeding procedures, pad replacement.
Electrical System:
Wiring diagrams, battery maintenance, charging system (stator, regulator, rectifier), lighting, ignition switch, starter motor, accessories.
Fuel System:
Carburetor (e.g., Keihin, Mikuni) service, tuning, jetting. Fuel tank, fuel lines, fuel pump (if applicable).
Exhaust System:
Exhaust pipe and muffler maintenance, gasket replacement.
Bodywork And Trim:
Fender removal and installation, fuel tank mounting, seat service, handlebar assembly.
Maintenance:
Routine maintenance schedules, oil changes, filter replacements, lubrication points, tune-up procedures.
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting guides.
Repair:
Step-by-step instructions for component disassembly, reassembly, and replacement.
Diagnostics:
Electrical system diagnostics, engine performance testing, carburetor adjustment.
Overhaul:
Complete engine rebuild procedures, transmission rebuild.
Depth:
Comprehensive from basic rider maintenance to full engine and transmission rebuilds, including detailed technical specifications and torque values.
Format:
PDF (Portable Document Format)
Searchability:
Text-searchable for quick information retrieval.
Print Quality:
High-resolution scans suitable for printing individual pages or the entire manual.
Binding:
N/A (Digital PDF download)
Paper:
N/A (Digital PDF download)
Engine Type:
Air-cooled, 45-degree V-twin
Engine Displacement:
73.75 cubic inches (1200 cc)
Bore X Stroke:
3.4375 in x 4.00 in (87.3 mm x 101.6 mm)
Compression Ratio:
Approximately 8.0:1 (varies slightly by specific tuning)
Valve Train:
Overhead valves (OHV), pushrod actuated
Horsepower Approx:
60-65 HP (estimated, factory figures often not quoted)
Torque Approx:
70-75 ft-lbs (estimated)
Carburetor Type:
Typically a Keihin butterfly or CV carburetor (e.g., Keihin 36mm CV or 38mm butterfly).
Fuel Type:
Unleaded gasoline, minimum 87 octane recommended.
Ignition Type:
Contact breaker points ignition system (early models) or electronic ignition (later models/upgrades).
Safety Ratings:
N/A for motorcycles of this era; safety dependent on rider skill and adherence to safe riding practices.
Braking System:
Dual disc front brakes, single disc rear brake (common configuration for FXB).
Lighting:
Headlight, taillight, brake light, turn signals.
Frame Construction:
Steel tube frame for structural integrity.
Infotainment System:
N/A; designed before widespread motorcycle infotainment systems. Basic analog gauges (speedometer, tachometer, oil pressure, ammeter).
Engine Management System:
Mechanical carburetor and points ignition system (or early electronic ignition), requiring manual adjustment and tuning.
Oil Change Interval:
Typically every 2,000-3,000 miles or annually, whichever comes first, depending on operating conditions and Harley-Davidson's specific recommendations for the era.
Primary Chaincase Oil Change:
Recommended at similar intervals to engine oil changes, or as specified for chaincase integrity.
Transmission Fluid Change:
Refer to manual; often at longer intervals than engine oil, e.g., 5,000-10,000 miles.
Engine Oil Type:
Harley-Davidson recommends specific V-twin motorcycle oils, typically of SAE 20W50 or 10W40 viscosity, with API SG or higher rating.
Primary Chaincase Fluid:
Harley-Davidson Formula+ or equivalent primary lubricant.
Transmission Fluid:
Harley-Davidson Formula+ or equivalent heavy-duty gear oil (e.g., SAE 80W-90).
Brake Fluid:
DOT 4 or DOT 5 silicone fluid, depending on original specification and system compatibility (manual will clarify).
Shifter Lever Wear:
Wear in the shifter pawl or dog engagement can lead to popping out of gear.
Carburetor Leaks:
Aging seals and gaskets in Keihin or other carburetors can lead to fuel leaks.
Oil Leaks:
Common with older V-twins due to worn seals, gaskets, and crankcase breather systems. Regular inspection and gasket replacement are crucial.
Ignition System Reliability:
Older points ignition systems can be prone to misfires due to wear or improper adjustment. Electronic ignition conversions are common upgrades.
Pushrod Tube Seals:
Failure of pushrod tube seals can cause oil leaks into the cylinders or crankcase.
Heritage:
Harley-Davidson is a legendary American motorcycle manufacturer founded in 1903, renowned for its V-twin engines and cruiser motorcycles.
Shovelhead Era:
The Shovelhead engine was produced from 1966 to 1984, evolving through various displacements and configurations. The FXB model represents a specific frame and engine combination from the later Shovelhead period.
Fx Series:
The FX series denotes Harley-Davidson's use of the Shovelhead engine in a frame that often incorporated elements from both the FL (cruiser) and XL (sportster) lines, offering a distinct styling and handling profile.
Production Period:
The Shovelhead engine was in production from 1966 to 1984. The 1980 model year falls within this significant era.
Manufacturing Location:
Harley-Davidson motorcycles were primarily manufactured in the United States, typically York, Pennsylvania, and Milwaukee, Wisconsin.
Historical Significance:
The Shovelhead engine is an iconic piece of Harley-Davidson history, recognized for its distinctive sound and power delivery, and is highly sought after by collectors and enthusiasts.
Market Perception:
Highly regarded as a classic motorcycle, representing a peak era for American V-twin engineering and style.
Manual Quality Endorsement:
This workshop manual is an essential certification for proper maintenance and repair of this classic Harley-Davidson model.
