Market Position:
Classic American V-twin cruiser, iconic model in Harley-Davidson's history, appeals to enthusiasts and restorers.
Competitive Analysis:
Competed with other large-displacement American motorcycles and European touring bikes. Known for its distinctive styling and rider experience.
Key Features:
Shovelhead engine, classic FL styling, robust construction, rider-focused ergonomics, strong aftermarket support.
Systems Covered:
Engine, Transmission, Drivetrain, Chassis, Electrical System, Fuel System, Brakes, Suspension, Bodywork, Special Tools, Troubleshooting
Estimated Page Count:
Hundreds (specific number not provided in product info, but implies comprehensive coverage)
Manual Type:
Factory Service Repair Manual
Engine:
1200cc (74ci) Evolution of the Panhead, Shovelhead engine components, including cylinder heads, barrels, pistons, crankshaft, camshaft, valvetrain, lubrication, cooling (air-cooled)
Transmission:
4-speed constant mesh, clutch, primary drive system, final drive (belt/chain specifics if applicable to the model year)
Drivetrain:
Drive chain/belt maintenance and adjustment, rear sprocket, front sprocket
Chassis:
Frame, front fork (often referred to as Springer or conventional telescopic), swingarm, steering head bearings, wheel bearings
Electrical System:
Ignition system (points, condenser, coil), charging system (generator/alternator, regulator), battery, lighting (headlight, taillight, turn signals), starter motor, wiring diagrams
Fuel System:
Carburetor (e.g., Keihin Butterfly, Linkert), fuel tank, fuel lines, fuel filter
Brakes:
Front and rear brake systems (drum or disc depending on specific FL model variant), master cylinder, calipers, brake lines, brake fluid specifications
Suspension:
Front fork service and oil, rear shock absorber maintenance and replacement
Bodywork:
Fenders, fuel tank, seat, handlebars, controls, fairings (if equipped)
Maintenance:
Regular scheduled maintenance, oil changes, filter replacements, chain/belt lubrication and adjustment, brake adjustments, spark plug replacement, battery charging
Troubleshooting:
Diagnostic procedures for common and uncommon problems, symptom-based troubleshooting guides
Repair:
Detailed step-by-step repair instructions for all major components, including engine rebuilds, transmission overhauls, electrical system repairs
Disassembly Reassembly:
Complete instructions for dismantling and reassembling all vehicle systems and components
Torque Specifications:
Precise torque values for all fasteners and critical components
Special Tools:
Identification and usage of specific Harley-Davidson tools required for certain procedures
Depth Of Information:
Comprehensive, covering everything from routine maintenance to full engine and transmission rebuilds, including electrical diagnostics and component-level repair.
Engine Type:
Air-cooled, four-stroke, 45-degree V-twin
Engine Displacement:
1200cc (74 cubic inches)
Bore X Stroke:
Approximately 3.4375 in. x 4.25 in. (87.3 mm x 108 mm) - specific to Shovelhead 74ci
Compression Ratio:
Varies by model and tuning, typically around 7.5:1 to 8.5:1 for stock 1979 models.
Valve Train:
Overhead valve (OHV) with pushrods
Horsepower:
Estimated 55-65 HP (varies by tuning and model variant)
Torque:
Estimated 65-75 ft-lbs (varies by tuning and model variant)
Carburetor Type:
Typically a Keihin Butterfly or possibly Linkert (check specific FL variant)
Fuel Type:
Unleaded gasoline, octane rating as recommended by Harley-Davidson (typically 87 or higher)
Oil Change Interval:
Typically every 2,000-3,000 miles or 6 months, whichever comes first (refer to manual for exact specification).
Primary Chain Tension Check:
Regular checks recommended, often every 5,000 miles.
Spark Plug Replacement:
Typically every 6,000-10,000 miles.
Engine Oil Type:
Varies by preference and climate, but typically SAE 20W-50 or 50W motorcycle-specific oil. Check manual for exact recommendation.
Transmission Fluid:
Harley-Davidson recommended transmission lubricant or equivalent SAE 80W-90 gear oil.
Brake Fluid:
DOT 3 or DOT 4 brake fluid (verify with manual, as some earlier models might have used different specs or drum brake fluid).
Primary Chain Case Oil:
Harley-Davidson primary chain case oil or SAE 20W-50 motorcycle oil.
Known Issues:
Valve guide wear, oil leaks (especially from rocker boxes and base gaskets), transmission shifting issues, starter clutch problems, weak charging systems (generator era).
Electrical Issues:
Aging wiring harnesses, ignition points/condenser maintenance, voltage regulator failures.
Brand Heritage:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines and cruiser motorcycles.
Model Evolution:
The FL Shovelhead is an evolution of the Panhead, featuring the distinctive Shovelhead engine design introduced in 1966. The 1979 model represents a mature iteration of this platform.
Production Years:
Shovelhead engine produced from 1966 to 1984. The FL platform existed for many years prior and continued with Evolution engines after.
Manufacturing Location:
Milwaukee, Wisconsin, USA
