Segment:
Cruiser Motorcycle
Target Audience:
Harley-Davidson FXS Shovelhead owners, mechanics, and restorers.
Competitors Manuals:
Competes with other OEM service manuals and aftermarket repair guides for American V-twin motorcycles of the era.
Manufacturer Support:
Provides manufacturer-specific procedures and specifications, crucial for maintaining originality and performance.
Diagnostic Focus:
Emphasis on troubleshooting and diagnosing issues specific to the Shovelhead engine and drivetrain.
Historical Value:
Essential resource for preserving and maintaining a classic Harley-Davidson motorcycle.
Engine:
Shovelhead V-Twin (disassembly, assembly, inspection, tuning, specific component overhauls)
Transmission:
4-Speed Cruise Drive (disassembly, assembly, clutch, primary drive)
Electrical System:
Ignition, charging system, lighting, starter, wiring diagrams, troubleshooting
Fuel System:
Carburetor (e.g., Keihin butterfly, sometimes Linkert in earlier models, but 1983 is likely Keihin), fuel lines, fuel tank
Brakes:
Front and rear brake systems (hydraulic, caliper, master cylinder, lines, pads)
Suspension:
Front forks (e.g., FLT style), rear shock absorbers, swingarm
Chassis And Frame:
Frame inspection, steering head, component mounting
Bodywork:
Fenders, tank, seat, handlebars, controls
Maintenance:
Routine service, oil changes, filter replacement, chain adjustment, spark plug service
Troubleshooting:
Diagnostic procedures for common and uncommon issues, symptom-based fault finding
Repair:
Component disassembly, repair, reassembly, and adjustment
Overhaul:
Complete engine and transmission rebuild procedures
Depth:
Comprehensive: Covers everything from basic fluid changes to full engine and transmission rebuilds, including detailed diagnostic flowcharts and specifications.
Engine Type:
Air-cooled, 45-degree V-twin OHV
Engine Displacement:
80 cubic inches (1310 cc)
Bore X Stroke:
3.4375 in x 4.25 in (87.3 mm x 108 mm)
Compression Ratio:
Approximately 8.2:1 (varies slightly by specific model/tuning)
Valve Train:
Overhead Valve (OHV) with pushrods and rocker arms
Ignition System:
Battery and coil, points ignition (likely with electronic ignition as an upgrade option)
Horsepower Estimate:
Approximately 60-65 HP (at crankshaft, varies by tuning and specific components)
Torque Estimate:
Approximately 70-75 lb-ft (at crankshaft, varies by tuning and specific components)
Carburetor:
Keihin Butterfly (likely 38mm CV or similar, though some early 80s might have had different options)
Fuel Type:
Unleaded Gasoline (minimum 87 octane recommended)
Oil Type:
Harley-Davidson 20W50 Motorcycle Oil or equivalent (mineral-based)
Oil Capacity Engine:
Approximately 3 US quarts (2.8 liters) including primary chaincase
Transmission Type:
4-speed manual, constant mesh
Clutch Type:
Wet multi-plate
Primary Drive:
Duplex chain (3/8" pitch)
Final Drive:
Belt drive (20mm, 122T)
Transmission Fluid Type:
Harley-Davidson primary chaincase lubricant or equivalent
Transmission Fluid Capacity:
Approximately 1 US quart (0.95 liters)
Wheelbase:
Approximately 62.6 inches (1590 mm)
Length:
Approximately 91.9 inches (2334 mm)
Dry Weight:
Approximately 585 lbs (265 kg)
Gross Vehicle Weight Rating:
Typically around 960 lbs (435 kg)
Safety Certifications:
No formal NCAP or IIHS ratings for motorcycles of this era. Focus on rider skill and responsible operation.
Braking System:
Dual-piston front disc brake, single-piston rear disc brake.
Lighting:
Halogen headlight, tail light, stop light, front and rear turn signals.
Frame Construction:
Steel tube frame designed for stability and rider comfort.
Oil Change Interval:
Every 2,000-3,000 miles or annually, whichever comes first (refer to manual for precise intervals).
Spark Plug Replacement:
Every 5,000-10,000 miles (depending on plug type and condition).
Primary Chain Adjustment:
Check and adjust at every 2,500 miles or as needed based on noise/performance.
Belt Drive Inspection:
Inspect for wear and tension at regular intervals (manual specifies).
Engine Oil:
Harley-Davidson 20W50 Motorcycle Oil (or API SG/SH rated 20W50)
Primary Chaincase Oil:
Harley-Davidson Primary Chaincase Lubricant or Formula+ Transmission Oil
Brake Fluid:
DOT 4 Hydraulic Brake Fluid (ensure compatibility)
Oil Leaks:
Common around pushrod tubes, oil filter, and primary cover due to aging seals and gaskets.
Carburetor Tuning:
May require periodic adjustment or rebuild for optimal performance and fuel economy.
Electrical Connections:
Corrosion or looseness in wiring harness connections can cause intermittent issues.
Primary Chain Tension:
Can slacken over time, leading to noise and potential damage if not adjusted.
Brand Legacy:
Harley-Davidson, an iconic American motorcycle manufacturer with a rich history dating back to 1903.
Shovelhead Era:
The Shovelhead engine (introduced in 1966) was a dominant force for Harley-Davidson, known for its distinctive sound and robust performance, evolving through the 70s and early 80s.
Fxs Designation:
The 'FX' designation typically indicated a frame that incorporated elements of both the FL (big twin) and XL (Sportster) lines, often with a rake and trail suitable for cruising.
Production Years:
Shovelhead engines were produced from 1966 to 1984. The FXS model was a prominent part of this lineage.
Manufacturing Location:
Milwaukee, Wisconsin, USA
