Market Position:
The FLSTN Heritage Softail represented a key model in Harley-Davidson's lineup during the 1990s, catering to riders seeking classic styling and comfortable touring capabilities. This manual is essential for owners and independent mechanics looking to maintain and repair these iconic motorcycles.
Competitive Analysis:
Competed with other large-displacement cruiser motorcycles from American and Japanese manufacturers. Its retro styling and V-twin engine were core selling points.
Key Features:
Classic styling with whitewall tires, chrome wire-spoke wheels, teardrop fuel tank, and extensive chrome accents. Comfortable riding position for long-distance cruising. Powered by the reliable Evolution V-Twin engine.
Years Covered:
1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
Manual Type:
Workshop Service Manual / Repair Manual
Format:
PDF (Digital Download)
Engine:
Evolution V-Twin Engine (1340cc/82 cubic inch), Carburetor systems (Keihin CV), Ignition systems, Cooling systems (air-cooled), Lubrication systems.
Transmission:
5-speed Cruise Drive Transmission, Clutch operation and adjustment, Gearbox internal components, Primary drive system.
Electrical:
Wiring diagrams, Lighting systems (headlight, taillight, turn signals), Ignition switch and components, Battery and charging system (alternator, regulator), Starter motor, Horn, Gauges and instrumentation, Accessory circuits.
Chassis:
Frame, Front suspension (telescopic forks), Rear suspension (swingarm, shock absorbers), Steering system (handlebars, steering head bearings), Wheel bearings, Brake systems (front and rear disc brakes, master cylinders, calipers), Fuel system (fuel tank, fuel lines, fuel pump for earlier EFI models if applicable, though most 90-99 FLSTN are carbureted), Exhaust system.
Bodywork:
Fenders, Fuel tank, Seat, Fairings (if equipped), Chrome trim, Paint and finishes, Body panel removal and installation.
Maintenance:
Scheduled maintenance, Oil changes, Filter replacements (oil, air), Spark plug replacement, Chain lubrication and adjustment (if applicable, though often belt drive), Brake pad replacement, Tire pressure checks and adjustments, Battery maintenance, Lubrication points.
Repair:
Engine disassembly and reassembly, Transmission overhaul, Brake system bleeding and repair, Suspension component replacement, Electrical component diagnosis and repair, Carburetor tuning and rebuilding, Fuel system troubleshooting.
Troubleshooting:
Diagnostic charts and procedures for common starting, running, and electrical issues. Symptom-based troubleshooting guides.
Depth:
Comprehensive, covering everything from basic scheduled maintenance and fluid checks to complete engine and transmission rebuilds, electrical system diagnostics, and chassis component overhauls. Includes detailed torque specifications, clearances, and assembly instructions.
Engine Type:
Air-cooled, Evolution V-Twin
Displacement:
1340 cc (82 cubic inches)
Bore X Stroke:
3.500 in x 4.250 in (88.9 mm x 108.0 mm)
Compression Ratio:
8.0:1 (typical, may vary slightly)
Horsepower:
Approx. 65-70 HP (at crankshaft, estimated)
Torque:
Approx. 80-85 ft-lbs @ 3000 RPM (estimated)
Fuel Delivery:
Keihin 40mm CV (Constant Velocity) carburetor. Some very late 99 models might have had early EFI, but the vast majority of this range is carbureted.
Fuel Type:
Unleaded gasoline, minimum 89 octane (Octane rating can vary by region, consult owner's manual for specifics).
Ignition Type:
Electronic Ignition (CDI or similar system)
Oil Capacity:
3.5 US quarts (3.3 liters) with filter change.
Oil Type:
Harley-Davidson High Performance Motorcycle Oil (or equivalent SAE 20W-50 motorcycle-specific oil).
Cooling Method:
Air-cooled
Wheelbase:
Approx. 63.5 inches (1613 mm)
Length:
Approx. 93.1 inches (2365 mm)
Seat Height:
Approx. 27.0 inches (686 mm)
Dry Weight:
Approx. 665 lbs (302 kg)
Gross Vehicle Weight Rating:
Approx. 1030 lbs (467 kg)
Fuel Capacity:
4.2 US gallons (15.9 liters)
Safety Ratings:
Motorcycle safety is primarily assessed through rider skill and adherence to traffic laws. No formal crash ratings like automobiles are applicable. The manual covers brake system maintenance critical for rider safety.
Active Features:
Dual disc front brakes, single disc rear brake, robust frame and suspension for stability.
Passive Features:
Headlight, taillight, brake light, turn signals, mirrors, horn.
Infotainment System:
Generally basic for this era; typically a radio (AM/FM) and often a CB/Intercom system on touring-oriented variants, but the FLSTN's focus was more on classic aesthetics. This manual will cover the operation and basic troubleshooting of any factory-installed audio systems.
Driver Assistance:
No electronic driver assistance systems (e.g., ABS, traction control) were standard or common on this model during this period. Safety relies on rider input and mechanical systems.
Connectivity:
No integrated smartphone connectivity or Bluetooth features for this generation.
First Service:
1000 miles (1600 km) or 6 months, whichever comes first (typically includes oil change, filter change, primary chain adjustment, and inspection).
Subsequent Oil Change:
Every 5000 miles (8000 km) or 12 months, whichever comes first.
Air Filter Replacement:
Check every 5000 miles (8000 km), replace as needed or per manual recommendations.
Spark Plug Replacement:
Typically every 10,000-15,000 miles (16,000-24,000 km).
Engine Oil Viscosity:
SAE 20W-50
Primary Drive Oil Type:
Harley-Davidson Primary Chaincase Lubricant or equivalent SAE 75W-90 gear oil.
Brake Fluid Type:
DOT 4 (for most models, verify with specific manual chapter as some older Harley's might have used different specs or had separate brake/clutch reservoirs).
Known Issues:
Potential for oil leaks from engine seals and gaskets, carburetor tuning sensitivity, cam chain tensioner wear (especially on earlier Evo models), some electrical connector corrosion, starter clutch issues on high-mileage units. The manual provides diagnostic procedures for these common concerns.
Brand Heritage:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines and distinctive styling.
Model Evolution:
The Heritage Softail line, introduced in the mid-1980s, pays homage to the classic styling of 1940s Harley-Davidsons. The FLSTN ('Nostalgia') variant specifically emphasized this retro aesthetic with vintage paint schemes, wide whitewall tires, and chrome wire-spoke wheels. It received minor updates throughout its production run within this specified period.
Production Period Covered:
1990-1999
Engine Platform:
Evolution (or 'Blockhead') engine, a successor to the Shovelhead and Panhead engines, known for its reliability and torque.
