Positioning:
Essential resource for owners and technicians maintaining and repairing the iconic Harley-Davidson FL 1340cc (Shovelhead) of 1980, targeting enthusiasts and professional mechanics.
Competitors:
While third-party manuals exist, factory service manuals like this one offer the most authoritative and detailed information directly from the manufacturer.
Features:
Comprehensive procedural explanations, detailed diagrams, troubleshooting guides, and factory specifications.
Coverage:
Comprehensive repair and adjustment procedures for Harley-Davidson FL 1340cc models.
Page Count:
Not Specified (Typical for this era's manuals, expect 300-600+ pages for comprehensive coverage)
Type:
Service Manual / Repair Manual
Purpose:
Designed for both professional mechanics and DIY enthusiasts, enabling self-sufficiency in motorcycle repair and maintenance.
Format:
Physical Print (Likely, as described for mechanics and DIY)
Engine:
Disassembly, assembly, repair, inspection, and tuning of the 1340cc Shovelhead engine.
Fuel System:
Carburetor (likely Keihin CV or Linkert, depending on exact sub-model), fuel pump, fuel lines, and fuel tank service.
Ignition System:
Ignition module, coils, spark plugs, timing, and troubleshooting.
Transmission:
4-speed Cruise Drive transmission: disassembly, assembly, gear inspection, shifting mechanism, and lubrication.
Drivetrain:
Primary drive, clutch, belt/chain final drive, and wheel bearing service.
Suspension:
Front fork (Glaser/Gerde) disassembly, rebuild, and fluid changes; rear shock absorber and swingarm service.
Brakes:
Front and rear brake systems: caliper service, master cylinder rebuild, brake pad replacement, hydraulic lines, and bleeding procedures.
Electrical System:
Wiring diagrams, lighting, charging system (generator/alternator), starter motor, battery service, and accessory circuits.
Frame And Bodywork:
Frame inspection, body panel removal/installation, mounting hardware, and basic cosmetic repairs.
Wheels And Tires:
Wheel bearing maintenance, tire replacement, balancing, and spoke tension adjustment.
Maintenance:
Oil changes, filter replacement, lubrication points, chain adjustment, battery checks, and general tune-ups.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, fault finding charts.
Repair:
Step-by-step instructions for component repair and replacement.
Disassembly Assembly:
Detailed instructions for taking apart and reassembling major motorcycle components.
Installation:
Guidance for installing new or replacement parts and accessories.
Adjustments:
Carburetor tuning, ignition timing, clutch and brake lever adjustments, cable routing.
Torque Specifications:
Provides crucial torque values for all critical fasteners, ensuring correct assembly and preventing component damage.
Depth:
Factory-level technical data for professional mechanics and experienced DIY enthusiasts; includes detailed diagrams and specifications.
Diagrams Illustrations:
Includes detailed exploded views, schematics, and diagrams essential for assembly/disassembly and troubleshooting.
Diagnostic Charts:
Likely includes troubleshooting flowcharts for common performance issues and system failures.
Engine Type:
Air-cooled, 45-degree V-twin, OHV (Overhead Valve)
Engine Family:
Shovelhead
Bore X Stroke:
3.4375 in. x 4.25 in. (87.31 mm x 107.95 mm)
Compression Ratio:
Approximately 8.0:1 (can vary slightly by specific FL sub-model)
Horsepower:
Approx. 60-65 HP @ 5000-5500 RPM (estimated, factory figures often not directly published for this era)
Torque:
Approx. 70-75 ft-lbs @ 3000-3500 RPM (estimated)
Carburetor Type:
Typically Harley-Davidson-spec Keihin Butterfly (CV) or Tillotson carburetor; some earlier or custom builds might retain Linkert.
Fuel Requirement:
Unleaded gasoline, typically 87 octane minimum.
Fuel Capacity:
Varies by tank size, typically 3.5 to 5.0 gallons.
Type:
4-speed constant mesh, foot-shift, hand-clutch (left side).
Optional Transmissions:
None standard for 1980 FL models.
Clutch Type:
Wet, multi-plate, cable-actuated.
Transmission Fluid Spec:
Harley-Davidson recommended transmission lubricant (e.g., SYN3 or equivalent; manual will specify)
Oil Change Interval:
Typically every 2,000-3,000 miles or 6 months, depending on usage. Manual will specify exact interval and oil type.
Primary Chain Tension:
Check and adjust typically every 5,000 miles.
Spark Plug Replacement:
Recommended every 10,000-12,000 miles, or as needed based on inspection.
Engine Oil Type:
Viscosity and type will be specified by Harley-Davidson; typically a 20W50 or 20W-50 motorcycle-specific oil. Could be mineral or synthetic.
Engine Oil Capacity:
Approx. 3 quarts (2.8 Liters) with filter change.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (manual will specify precise type).
Known Issues:
Shovelhead engines are known for oil leaks (common in older air-cooled V-twins), potential rocker box oil seepage, pushrod seal leaks, and occasional transmission shifting issues if not properly maintained. Carburetor tuning can be sensitive. Early models might experience issues with the original ignition systems.
Common Repairs:
Gasket replacements (base, head, rocker box, primary), clutch adjustments, brake system rebuilds, and electrical system maintenance.
Brand History:
Harley-Davidson, founded in 1903, is an American motorcycle manufacturer known for its cruiser, touring, and custom motorcycles.
Model Lineage:
The FL designation historically represents Harley-Davidson's large displacement touring and cruiser models. The 1340cc engine, commonly known as the Shovelhead (introduced in 1966), was the flagship engine for many years.
Production Era:
The Shovelhead engine was produced from 1966 to 1984. 1980 models represent a mature phase of this engine's development.
Manufacturing Location:
Milwaukee, Wisconsin, USA (Harley-Davidson's traditional manufacturing base).
